To see the other types of publications on this topic, follow the link: Fish biometrics.
Journal articles on the topic 'Fish biometrics'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Fish biometrics.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Melani, Hellen, Ari B. Rondonuwu, Joudy R. R. Sangari, Fransine B. Manginsela, Silvester B. Pratasik, and Suzanne L. Undap. "Cardinal Fish Otolith Biometrics Banggai Pterapogon kauderni Koumans, 1933 In the Front Waters of Dudepo TPI Dudepo, South Bolaang Mongondow Regency and in the Lembeh Strait, Bitung City." Jurnal Ilmiah PLATAX 11, no. 1 (2023): 74–80. http://dx.doi.org/10.35800/jip.v11i1.44002.
Full textAbstract:
This study aims to determine the biometric comparison of otoliths of Banggai cardinal fish based on gender and to determine the comparison of otolith biometrics at two locations in the Waters Front of TPI Dudepo Kab. South Bolaang Mongondow and in the Lembeh Strait, Bitung City. Data collection in the field using the roaming survey method. Fishing is done by snorkelling, catching a minimum of 50 individuals representing each size class using Chang net/Sibu fishing gear. The differences in otoliths in male and female sexes have seven different otolith characters in otolith length (OL), otolith width (OW), otolith area (OA) and otolith perimeter (OP), roundness (Rnd), ellipticity (Ell) and aspect ratio (Ar), and three characters that do not show significant differences, namely form factor (Ff), circularity (Cir), rectangularity (Rec). The differences in otoliths based on location in front of the Dudepo TPI and in the Lembeh Strait have seven different otolith characters in otolith length (OL), otolith width (OW), otolith area (OA) and otolith perimeter (OP), roundness (Rnd), ellipticity (Ell). and aspect ratio (Ar), and three characters that do not show significant differences, namely form factor (Ff), circularity (Cir), rectangularity (Rec).
 
 Keywords: Biometrics, cardinal proud fish, comparison
 
 Abstrak
 Penelitian ini bertujuan untuk mengetahui perbandingkan biometrik otolit ikan kardinal banggai berdasarkan jenis kelamin dan mengetahui perbandingan biometrik otolit pada dua lokasi di Perairan Depan TPI Dudepo Kab. Bolaang Mongondow Selatan dan di Selat Lembeh Kota Bitung. Pengambilan data di lapangan menggunakan metode survei jelajah. Penangkapan ikan dilakukan dengan penyelaman snorkling, penangkapan minimal 50 individu yang mewakili setiap kelas ukuran dengan alat tangkap Chang net/Sibu. Perbedaan otolit pada jenis kelamin jantan dan jenis kelamin betina memiliki tujuh perbedaan karakter otolit pada panjang otolit (OL), lebar otolit (OW), area otolit (OA) dan perimeter otolit (OP), roundness (Rnd), ellipticity (Ell) dan aspect ratio (Ar), dan tiga karakter yang tidak menunjukkan perbedaan yang signifikan, yaitu form factor (Ff), circularity (Cir), rectangularity (Rec). Perbedaan otolit berdasarkan lokasi di depan TPI Dudepo dan di Selat Lembeh memiliki tujuh perbedaan karakter otolit pada panjang otolit (OL), lebar otolit (OW), area otolit (OA) dan perimeter otolit (OP), roundness (Rnd), ellipticity (Ell) dan aspect ratio (Ar), dan tiga karakter yang tidak menunjukkan perbedaan yang signifikan, yaitu form factor (Ff), circularity (Cir), rectangularity (Rec).
 
 Kata kunci: Biometrik, ikan banggai kardinal, perbandingan
2
Marsaoly, Rafil, Nego Bataragoa, Ari B. Rondonuwu, Adnan S. Wantasen, Unstain Rembet, and Jans Lalita. "Biometrics and Reproduction of Redbelly Yellowtail fusilier Caesio cuning (Bloch, 1791) in Guraping Bay, Halmahera Island, Indonesia." Jurnal Ilmiah PLATAX 12, no. 1 (2023): 114–24. http://dx.doi.org/10.35800/jip.v12i1.49322.
Full textAbstract:
This study aims to analyze the biometrics of yellowtail fish (length-weight relationship, growth patterns, condition factors, length-fecundity relationship) and reproductive aspects (gonadal maturity level, gonadal maturity index, and fecundity). The yellowtail fish sample used in this study was taken from fishermen's catches in April 2023. A total of 73 male individuals 17.0-29.9 cm total length, 62.00-356.00 gram, 77 female individuals 17.5-8 .1 cm total length, weight 69.88-288.00 grams. Male length-weight relationship W= 0.0140L2.9662 R2= 0.9812, isometric growth pattern. Female W= 0.0166L2.9104, R2 = 0.9633, growth pattern isometric. Condition factor 1.00 ± 0.06 for males and 1.00 ± 0.07 for females. Gonadal maturity levels I, II, III, IV and V for both males and females with the number of individuals at TKG I 65, II 26, III 25, IV 24, and V 10 individuals. The gonadal maturity index with the highest average value was 1.08 ± 0.47 at TKG IV. Fecundity ranged from 1.771-68.425 which was calculated on 28 fish samples with a mean ± SD of 20.158 ± 19.110. Biometric relationship with fecundity F = 102.67L0.1955, R² = 0.0789 shows a very weak relationship between length and fecundity. Keywords: Length-weight, condition factor, maturity, gonad index, fecundity. Abstrak Penelitian ini bertujuan untuk menganalisis biometrik ikan ekor kuning (hubungan panjang-berat, pola pertumbuhan, faktor kondisi, hubungan panjang-fekunditas) dan aspek reproduksi (tingkat kematangan gonad, indeks kematangan gonad, dan fekunditas). Sampel ikan ekor kuning yang digunakan dalam penelitian ini diambil dari tangkapan nelayan pada bulan April 2023. Sebanyak 73 individu jantan 17,0-29,9 cm panjang total, 62,00-356,00 gram, 77 individu betina 17,5-8,1 cm panjang total, berat 69,88-288,00 gram. Hubungan panjang-berat jantan W= 0,0140 L 2,9662 R2= 0,9812, pola pertumbuhan isometrik. Betina W= 0,0166L2,9104, R2 = 0,9633, pola pertumbuhan isometrik. Fakotor kondisi 1,00±0,06 untuk jantan dan betina 1,00±0,07. Tingkat kematangan gonad I, II, III, IV dan V baik jantan maupun betina dengan jumlah individu pada TKG I 65, II 26, III 25, IV 24, dan V 10 individu. Indeks kematangan gonad dengan nilai rata-rata tertinggi yaitu 1,08±0,47 pada TKG IV. Fekunditas berkisar pada 1.771-68.425 yang dihitung pada 28 sampel ikan dengan rata-rata ± SD 20.158 ±19.110. Hubungan biometrik dengan fekunditas F = 102,67L0,1955, R² = 0,0789 menunjukkan hubungan yang sangat lemah antara panjang dan fekunditas. Kata Kunci: Panjang-berat, faktor kondisi, kematangan gonad indeks, fekunditas.
3
Silva, Fabricio Nilo Lima da, Raoani Cruz Mendonça, Manoel Luciano Aviz de Quadros, et al. "Good management practices course and social technologies for aquaculture farmers in Marajó, Pará, Brazil." Revista Ibero-Americana de Ciências Ambientais 11, no. 4 (2020): 49–58. http://dx.doi.org/10.6008/cbpc2179-6858.2020.004.0004.
Full textAbstract:
The objective of this study was capacitate aquaculture farmers and develop social technologies for the culture of tambaqui (Colossoma macropomum) in the archipelago of Marajó (Pará - Brazil). The study was carried out in the municipality of Curralinho by the Federal Institute of Education, Science and Technology of Pará (IFPA) Campus Breves, in March 2020. Two structured questionnaires were applied to 13 course participants who participated in the training. The first was before the course, about fish farming and the adoption of Good Management Practices (BPM) adopted by aquaculture farmers in the Marajó region. The second, composed of closed questions to evaluate the training course, whose themes were: 1) water quality, 2) indicated species, 3) fish transport management, 4) fish quarantine and stock, 5) fish biometrics, 6) liming and fertilizing ponds, 7) management of fish nutrition and health, and 8) fish harvesting and slaughter, were approached in the course. At the end of the lectures / training, a workshop for the production of social technologies was conducted, among students, teachers and aquaculture farmers. Previous knowledge about fish farming and the adoption of BPM were essential for the effectuation of the course. Issues about water quality, biometrics and fish nutrition and health were the ones that called the most attention from aquaculture farmers. Secchi's disk, ichthyometer, hand net and net-tank were the social technologies built. Post-course evaluation was essential to understand the impact of the socialization of knowledge provided to the community. In conclusion, the project reinforced teaching, research and extension actions, involving the community in favor of strengthening aquaculture in the Marajó island, Pará, Brazil.
4
Li, Haili. "Biometric-Driven Digital Village Governance: A SWOC-Enabled Model with Fraud Prevention." Journal of Electrical Systems 20, no. 3s (2024): 1929–40. http://dx.doi.org/10.52783/jes.1732.
Full textAbstract:
In the digital age, the integration of advanced technologies and biometrics plays a pivotal role in transforming governance models. This research introduces an innovative approach to digital village governance, leveraging the potential of biometric data in biomedical applications while incorporating robust fraud detection mechanisms. The proposed model harnesses the power of Swarm Fish Optimization Classification (SWOC) to enhance the accuracy and efficiency of biometric-based authentication systems, ensuring the security of village governance processes. The study outlines the multifaceted components of the Intelligent Digital Village Governance Model, emphasizing its adaptability to the unique needs of rural communities. Central to this model is the utilization of biometric data, such as fingerprints, for user identification, access control, and the delivery of essential services. SWOC, with an optimization and classification algorithm inspired by swarm behavior, is integrated to refine the accuracy of biometric identification and detect fraudulent activities. Experimental results demonstrate the efficacy of SWOC in enhancing the accuracy of biometric-based authentication, thereby strengthening the security of digital village governance. The model's adaptability, scalability, and compliance with ethical standards are also discussed, ensuring responsible deployment in rural settings.
5
Ramírez-Coronel, Fernando Joaquín, Oscar Mario Rodríguez-Elías, Edgard Esquer-Miranda, Madaín Pérez-Patricio, Anna Judith Pérez-Báez, and Eduardo Antonio Hinojosa-Palafox. "Non-Invasive Fish Biometrics for Enhancing Precision and Understanding of Aquaculture Farming through Statistical Morphology Analysis and Machine Learning." Animals 14, no. 13 (2024): 1850. https://doi.org/10.3390/ani14131850.
Full textAbstract:
This research addresses the problem of biomass estimation and fish development monitoring by developing and meticulously validating a computer-vision-interpretable methodology for fish biometrics based on the extraction of statistical features of shape and size through a signature function. This is done by comparing manually extracted features in machine learning predictions against the computer vision (image feature extraction) machine learning predictions. This research shows promising results in statistical accuracy and error metrics, especially the computer vision methodology plus artificial neural networks for biomass prediction. It is concluded that the signature-function-based methodology plus the neural networks regression is competitive for biomass estimation and provides a powerful interpretable tool for species morphology development research. As a result, from a better understanding of fish development and biomass estimation, the aquaculture sector can improve production, wasting less animal food and detecting fish welfare problems through deformity detection, which translates into reduced costs and improved quality of animal meat.
6
Mutlu, Erhan. "A Package of Script Codes, POSIBIOM for Vegetation Acoustics: POSIdonia BIOMass." Journal of Marine Science and Engineering 11, no. 9 (2023): 1790. http://dx.doi.org/10.3390/jmse11091790.
Full textAbstract:
Macrophytes and seagrasses play a crucial role in a variety of functions in marine ecosystems and respond in a synchronized manner to a changing climate and the subsequent ecological status. The monitoring of seagrasses is one of the most important issues in the marine environment. One rapidly emerging monitoring technique is the use of acoustics, which has advantages compared to other remote sensing techniques. The acoustic method alone is ambiguous regarding the identities of backscatterers. Therefore, a computer program package was developed to identify and estimate the leaf biometrics (leaf length and biomass) of one of the most common seagrasses, Posidonia oceanica. Some problems in the acoustic data were resolved in order to obtain estimates related to problems with vegetation as well as fisheries and plankton acoustics. One of the problems was the “lost” bottom that occurred during the data collection and postprocessing due to the presence of acoustic noise, reverberation, interferences and intense scatterers, such as fish shoals. Another problem to be eliminated was the occurrence of near-bottom echoes belonging to submerged vegetation, such as seagrasses, followed by spurious echoes during the survey. The last one was the recognition of the seagrass to estimate the leaf length and biomass, the calibration of the sheaths/vertical rhizomes of the seagrass and the establishment of relationships between the acoustic units and biometrics. As a result, an autonomous package of code written in MATLAB was developed to perform all the processes, named “POSIBIOM”, an acronym for POSIdonia BIOMass. This study presents the algorithms, methodology, acoustic–biometric relationship and mapping of biometrics for the first time, and discusses the advantages and disadvantages of the package compared to the software dedicated to the bottom types, habitat and vegetation acoustics. Future studies are recommended to improve the package.
7
Larasati, Aulia Nur, Ridwan Affandi, Mohammad Mukhlis Kamal, and Dudi Muhammad Wildan. "BIOMETRIC CHARACTERISTICS AND STRESS LEVELS OF GLASS EEL (Anguilla sp.) IN THE SOUTHERN ESTUARIES OF SUKABUMI, WEST JAVA." Jurnal Teknologi Perikanan dan Kelautan 16, no. 1 (2025): 1–11. https://doi.org/10.24319/jtpk.16.1-11.
Full textAbstract:
Palabuhanratu Bay is the terminating flow for some rivers, i.e. the Cimandiri River, Ciletuh River, Cikaso River, and Cibuni River, where the estuary is the entry route for glass eels (Anguilla spp.) or fish seeds from sea waters to these estuaries. Different rivers have different water quality conditions that may imply differences in the quality and quantity of eels entering the estuary. This research aims to determine locations with superior seeds, and seeds with low quality based on studying biometric characteristics and stress levels of eel seeds in several estuaries in the south of Sukabumi, West Java. The information gathered is subject to determining the highly recommended use of glass eels as seeds in eel aquaculture, as well as determining the area where habitat rehabilitation and conservation. The research was carried out in four locations, namely the Cimandiri, Ciletuh, Cibuni, and Cikaso River Estuaries, from December 2021 to January 2022, the peak time for eel seed migration. The parameters observed include water physics and chemistry, biometrics, and blood glucose. The research results show that each location has different physical and chemical water parameter values but has relatively the same stress level. The best biometric value of eel fish seeds was found in eel seeds originating from the Cimandiri River, while the lowest one was at the mouth of the Cibuni River. Therefore, eels that are suitable for cultivation activities come from the Cimandiri River Estuary, while the eel location that needs conservation is the Cibuni River Estuary.
8
Hubbard, Jennifer. "Johan Hjort: The Canadian Fisheries Expedition, International Scientific Networks, and the challenge of modernization." ICES Journal of Marine Science 71, no. 8 (2014): 2000–2007. http://dx.doi.org/10.1093/icesjms/fsu086.
Full textAbstract:
Abstract By leading the Canadian Fisheries Expedition of 1914–1915 Johan Hjort took the opportunity to do far more than just survey herring, other fish stocks, and the hydrography of Canadian Atlantic waters. He also attempted to improve the backward fish-processing technologies used in the local fisheries, an agenda blocked by the Canadian government. Hjort did succeed markedly, however, in introducing Canadian scientists to the International Council for the Exploration of the Sea's new scientific methods for fisheries research. He and his colleagues offered training in the new dynamic oceanography as well as population demographic studies and biometrics for studying fish populations, races, and other units. His extroverted leadership-initiated lasting linkages between Canadian and Scandinavian scientists, and created an international network of fisheries biologists.
9
Ghazwan, Muhammad I. "Replacing Formalin with Alcohol and its Effect on Preserved Fish Specimens." IOP Conference Series: Earth and Environmental Science 1259, no. 1 (2023): 012085. http://dx.doi.org/10.1088/1755-1315/1259/1/012085.
Full textAbstract:
Abstract This study aims to formulate an alternative solution for Formalin for preserving fish as study specimens for long periods. The main reason for finding a solution instead of formalin is to get rid of the negative effects of this solution on those who work with it, as well as to better preserve the bodies of fish. Hence, three new solutions were proposed to replace formalin. Thus, Formalin, in turn, may enter the composition of a small part of these solutions to give better results and for long periods of keeping specimens. All solutions prepared in this study participated in being acidic as in formalin. Two solutions succeeded in compensating for the use of formalin in preserving fish bodies for a period of six months, with a lesser effect on some of the studied biometrics of fish kept in these two solutions.
10
Ghazwan, Mohammed Inad. "A Study of Some Biological Aspects of Pacu Piaractus Brachypomus (G. Cuvier, 1818)." Diyala Agricultural Sciences Journal 13, no. 2 (2021): 10–15. http://dx.doi.org/10.52951/dasj.21130202.
Full textAbstract:
The present study attempts to shed light on some biological aspects and characteristics of Piaractus brachypomus, including some biometrics, phenotypic and feeding pattern that characterizes this species. Besides, the study touches upon the body shape and the Otolith. These fish species have recently been seen frozen in the Iraqi local market. The standard length of fish specimens in this study reach 26.55cm it exceeded the specimens of Pacu fish collected from other studies from other countries, As well the specimens weight was 632gm it exceeded other studies mentioned in this manuscript. As the irregularity in the distribution of teeth rows, especially in the lower jaw was clear in our specimens. The average weight of some skull bones of Piaractus brachypomus specimens is 2.25g, which gives evidence of the heaviness of the bones of this species.
11
Firdus, Firdus, Samadi Samadi, Abdullah A. Muhammadar, et al. "Gut and intestinal biometrics of the giant trevally, Caranx ignobilis, fed an experimental diet with difference sources of activated charcoal." F1000Research 9 (May 26, 2020): 444. http://dx.doi.org/10.12688/f1000research.23788.1.
Full textAbstract:
Background: The giant trevally, Caranx ignobilis, is a commercially important marine fish in Indonesia. This species was initially cultured in Aceh Province. Previous reports showed that charcoal has a positive effect on survival and feed utilization of the giant trevally. However, the effects of adding charcoal to the diet on gut and intestine biometrics has, to our knowledge, never been described. Methods: Four activated charcoal sources were tested in this study using a completely randomized experimental design; coconut shell charcoal, mangrove wood charcoal, rice husk charcoal, and kernel palm shell charcoal. All treatments were performed with four replications. Juvenile giant trevally (average body weight, 16.52 ± 3.12 g; and average total length, 10.26 ± 0.64 cm) were stocked into the experimental tank at a density of 15 fish per tank. The fish were fed an experimental diet twice daily at 7 AM and 5 PM ad satiation for 42 days. Results: Analysis of variance showed that adding charcoal to the diet had significant effects on the length and width of the foveola gastrica and villous intestine (P < 0.05). The greatest length and width of the foveola gastrica was recorded in fish fed an experimental diet of rice husk charcoal with average values of 311.811 ± 9.869 µm and 241.786 ± 10.394 µm, respectively. The greatest length of intestinal villous was found in fish fed the mangrove wood charcoal diet, with a value of 135.012 ± 5.147 µm, but this length was not significantly different to that in fish fed rice charcoal and kernel palm shell charcoal. However, the greatest width of intestinal villous was recorded in fish fed the control diet (without charcoal; P < 0.05). Conclusion: The optimal sizes of the foveola gastrica and villous intestine were found in fish fed an experimental diet with rice husk charcoal.
12
Firdus, Firdus, Samadi Samadi, Abdullah A. Muhammadar, et al. "Gut and intestinal biometrics of the giant trevally, Caranx ignobilis, fed an experimental diet with difference sources of activated charcoal." F1000Research 9 (October 13, 2020): 444. http://dx.doi.org/10.12688/f1000research.23788.2.
Full textAbstract:
Background: The giant trevally, Caranx ignobilis, is a commercially important marine fish in Indonesia. This species was initially cultured in Aceh Province. Previous reports showed that charcoal has a positive effect on survival and feed utilization of the giant trevally. However, the effects of adding charcoal to the diet on gut and intestine biometrics has, to our knowledge, never been described. Methods: Four activated charcoal sources were tested in this study using a completely randomized experimental design; coconut shell charcoal, mangrove wood charcoal, rice husk charcoal, and kernel palm shell charcoal. All treatments were performed with four replications. Juvenile giant trevally (average body weight, 16.52 ± 3.12 g; and average total length, 10.26 ± 0.64 cm) were stocked into the experimental tank at a density of 15 fish per tank. The fish were fed an experimental diet twice daily at 7 AM and 5 PM ad satiation for 42 days. Results: Analysis of variance showed that adding charcoal to the diet had significant effects on the length and width of the foveola gastrica and villous intestine (P < 0.05). The greatest length and width of the foveola gastrica was recorded in fish fed an experimental diet of rice husk charcoal with average values of 311.811 ± 9.869 µm and 241.786 ± 10.394 µm, respectively. The greatest length of intestinal villous was found in fish fed the mangrove wood charcoal diet, with a value of 135.012 ± 5.147 µm, but this length was not significantly different to that in fish fed rice charcoal and kernel palm shell charcoal. However, the greatest width of intestinal villous was recorded in fish fed the control diet (without charcoal; P < 0.05). Conclusion: The optimal sizes of the foveola gastrica and villous intestine were found in fish fed an experimental diet with rice husk charcoal.
13
Akmal, Yusrizal, Rossy Azhar, Muchammad Yunus, Hani Plumeriastuti, Yeni Dhamayanti, and Agung Setia Batubara. "Biometrics of the gastrointestinal tract of Tor tambra and Tor soro from Aceh, Indonesia." BIO Web of Conferences 87 (2024): 03007. http://dx.doi.org/10.1051/bioconf/20248703007.
Full textAbstract:
The gastrointestinal tract of native fish shows structural and functional diversity, which is related to different dietary requirements, feeding habits, phylogeny, age, body shape, and sex. There is some research that discusses the digestive tract of fish, but research on the digestive tract of Tor tambra and Tor soro is still limited. The purpose of this study was to describe the biometrics of the stomach and intestines of T. tambra and T. soro harvested from Leuser Ecosystem Area. This study included sample collection, sample preparation, gastrointestinal biometrics, and data analysis. The observation parameters include GaSI (Gastro Somatic Index), ISI (Intestine Somatic Index), RGL (Relative Gut Lengths), and RIL (Relative Intestine Lengths). The measurement data were tested using analysis of variance (ANOVA). The results showed that the highest GaSI, ISI, RGL and RIL values were in T. tambra with respective values of 0.50±0.24%, 2.46±0.58%, 44.35±5.22%, and 340.37±33.99%, while the lowest values were found in T. soro, whereas 0.22±0.07%, 1.57±0.55%, 32.03±14.99%, and 259.62±65.74%, respectively. The results of the statistical analysis showed that there were significant differences (P<0.05) in the GaSI, ISI, and RIL values, while RGL no significant differences (P>0.05) between the two species.
14
Muhammad, Inad Ghazwan. "Differences in some cranial bones between two Cyprinidae species, Common carp Cyprinus carpio (Linnaeus, 1758) and Crucian Carp Carassius carassius (Linnaeus, 1758) Collected from Tigris River, Iraq." GSC Biological and Pharmaceutical Sciences 15, no. 3 (2021): 225–37. https://doi.org/10.5281/zenodo.5060748.
Full textAbstract:
The present study attempts to identify some of the differences between the skull bones of two species <em>Cyprinus carpio</em> and <em>Carassius carassius</em>, which belong to the Cyprinidae family. The study is a taxonomic diagnostic study between the two species which are considered local fish abundant in the Iraqi aquatic environment
15
Čolak, Slavica, Silvia Križanac, Božena Vitlov, Josipa Raljević, Renata Barić, and Lav Bavčević. "Effects of Feed Quality on Growth and Feed Utilization of Gilthead Seabream (Sparus aurata, L.) at Low Temperatures." Naše more 71, no. 3 (2024): 109–14. https://doi.org/10.17818/nm/2024/3.3.
Full textAbstract:
The gilthead seabream (Sparus aurata) is cultured throughout the Mediterranean; the sea temperature most significantly determines the duration of farming. Sea temperatures reduce gilthead seabream’s need for feed and fish growth is not expected in these conditions. It is hypothesized that improving feed formulation could improve growth during the winter months. For the research, two groups were formed, and fed for a month with two types of fish feed of different nutritional composition at an average temperature of 13.9 ± 0.90 °C. The fish from cage A (21.53 ± 1.53 cm; 173.77 ± 38.24 g) were fed fish feed containing protein and lipid 100% from marine origin (H1). The fish from cage B (22.17 ± 1.43 cm; 181.08 ± 43.05 g) were fed with commercial feed for gilthead seabream, whose proteins and lipids were partially replaced by plant raw materials (H2). The temperature was measured daily and samples were taken at the beginning and end of the experiment for biometrics, which included the fish’s total length, total weight, and condition factor. This study showed that fish fed with a modified formula achieved higher growth parameters than fish fed with commercial feed. The data obtained indicate that gilthead seabream can grow at low temperatures and there is a need for further research to ensure the correct selection of raw materials for the testing and production of feed for the period of low sea temperatures.
16
Ramírez-Coronel, Fernando Joaquín, Oscar Mario Rodríguez-Elías, Edgard Esquer-Miranda, Madaín Pérez-Patricio, Anna Judith Pérez-Báez, and Eduardo Antonio Hinojosa-Palafox. "Non-Invasive Fish Biometrics for Enhancing Precision and Understanding of Aquaculture Farming through Statistical Morphology Analysis and Machine Learning." Animals 14, no. 13 (2024): 1850. http://dx.doi.org/10.3390/ani14131850.
Full textAbstract:
Aquaculture requires precise non-invasive methods for biomass estimation. This research validates a novel computer vision methodology that uses a signature function-based feature extraction algorithm combining statistical morphological analysis of the size and shape of fish and machine learning to improve the accuracy of biomass estimation in fishponds and is specifically applied to tilapia (Oreochromis niloticus). These features that are automatically extracted from images are put to the test against previously manually extracted features by comparing the results when applied to three common machine learning methods under two different lighting conditions. The dataset for this analysis encompasses 129 tilapia samples. The results give promising outcomes since the multilayer perceptron model shows robust performance, consistently demonstrating superior accuracy across different features and lighting conditions. The interpretable nature of the model, rooted in the statistical features of the signature function, could provide insights into the morphological and allometric changes at different developmental stages. A comparative analysis against existing literature underscores the competitiveness of the proposed methodology, pointing to advancements in precision, interpretability, and species versatility. This research contributes significantly to the field, accelerating the quest for non-invasive fish biometrics that can be generalized across various aquaculture species in different stages of development. In combination with detection, tracking, and posture recognition, deep learning methodologies such as the one provided in the latest studies could generate a powerful method for real-time fish morphology development, biomass estimation, and welfare monitoring, which are crucial for the effective management of fish farms.
17
Pala, Gabriela, Eduardo Pahor-Filho, Jaqueline Custódio da Costa, Suzana Kotzent, and Lindomar de Oliveira Alves. "Environmental factors can affect the relationship between Nile tilapia and its parasites in cage systems culture." Brazilian Journal of Animal and Environmental Research 5, no. 4 (2022): 3797–812. http://dx.doi.org/10.34188/bjaerv5n4-028.
Full textAbstract:
Parasites represent a serious obstacle in Brazilian intensive fish farming, and then, monitoring parasitic infestations in aquaculture is a duty of every tilapia producer. The objective of this study was to identify the branchial ectoparasites of Nile tilapia, evaluate the correlation between parasitic intensity, host biometrics, and limnological variables, as well as to identify gill histological changes in fish. Thus, fish representing the three phases (I, II, and III) of production were collected in two commercial fish farms - 1 and 2, necropsied, and their parasites quantified and identified. The gill alterations were processed for histological analysis. Cichlidogyrus sclerosus and Scutogyrus longicornis (Monogenoidea), and Lamproglena monodi (Lernaeidae) have been identified in the tilapia gills. The highest intensities of Monogenoidea infestation were in summer and autumn in both fish farms, with a positive correlation between parasites and water temperature. Infestation by L. monodi occurred only in Fish farm 2, with greater infestations in winter and spring, with a negative correlation between water temperature and parasitism. There was also an increase in parasitism according to the weight and length of the fish in the two fish farms. Histological changes such as hyperplasia, lamellar hypertrophy, and the presence of basophilic cysts on the secondary lamellae were detected in tilapia. Thus, water quality parameters and season of the year, which are closely related, can affect communities of parasites that infest Nile tilapia grown in cages. These findings are important to assist in planning disease control and prevention strategies for Nile tilapia fish farming, to reduce economic losses resulting from fish diseases and death.
18
De Souza, Diego Moreira, Loani Weber Garcia, Juliana Pereira Fonseca, et al. "Compensatory growth of tilapias (Oreochromis niloticus) reared in earthen ponds in Southern Brazil / Crescimento compensatório de tilápias (Oreochromis niloticus) cultivadas em viveiros escavados no Sul do Brasil." Brazilian Journal of Animal and Environmental Research 4, no. 2 (2021): 1895–901. http://dx.doi.org/10.34188/bjaerv4n2-026.
Full textAbstract:
Tilapia fingerlings (0.5 ± 0.08g) were reared during the nursery phase in two different stocking densities (0.5 fish/m2 for control in a pond of 600m² and 75 fish/m2 for compensatory group in a cage of 4m²) for a period of 100 days. After this period, a 50-day trial study was performed with 43 juvelines of tilapia (Oreochromis niloticus) for each group (control 294 ± 24.43g and compensatory 99.33 ± 16.99g) stocked at the same density (0,28 fish/m2) in order to evaluate the compensatory growth in eathern ponds of 160m2 for each treatment. Throughout the experimental period the water quality was monitored and biometrics were performed to evaluate the zootechnical performance. The results revealed that the fishes of compensatory group presented higher specific growth rate compared to control, demonstrating a compensatory growth. At the end of the trial both treatments presented weight loss strongly influenced by temperature decrease. These results showed the compensatory growth of O. niloticus and the possibility to use this strategy (nursery in high density) contributing to ensure a successful production of O. niloticus in this region of the country.
19
Fola-Matthews, Omolara Opeyemi, Olufemi Olukolajo Soyinka, and Aderonke Omolara Lawal-Are. "Biometrics of the Common Smooth-Hound Shark, Mustelus mustelus from Landing Sites of Lagos and Ondo Coasts (Nigeria)." Transylvanian Review of Systematical and Ecological Research 26, no. 1 (2024): 95–108. http://dx.doi.org/10.2478/trser-2024-0006.
Full textAbstract:
Abstract This study investigates the biometrics of the common smooth-hound shark, Mustelus mustelus, from fish landing sites of the Lagos and Ondo Coasts. Morphometric measurements and meristic counts were used on 1,018 specimens to analyze morphometric differentiations. Significant sex-based differences were found across various morphometric traits, with phenotypically separable populations observed between locations. Bray-Curtis analysis categorized morphometrics into four groups based on similar characteristics. Principal component analysis identified three components, with PC1 dominated by chondrocranium and gill slit measurements, PC2 by gill slit and fin origin measurements, and PC3 by snout and fin origin measurements.
20
QI, YAQIANG, and JIANLIN NIU. "DOES CHILDHOOD NUTRITION PREDICT HEALTH OUTCOMES DURING ADULTHOOD? EVIDENCE FROM A POPULATION-BASED STUDY IN CHINA." Journal of Biosocial Science 47, no. 5 (2015): 650–66. http://dx.doi.org/10.1017/s0021932014000509.
Full textAbstract:
SummaryUsing data collected from the 2008 survey of Internal Migration and Health in China, this study examines the impact of late childhood nutrition intakes on a wide range of indicators of adult health. The results show that respondents who consume rich nutrients (meat, fish, milk, etc.) less frequently during late childhood have worse health outcomes when they grow up. They are more likely to rate their health as ‘fair/poor’, report a greater number of chronic diseases, have a higher incidence of acute illness, perceive greater numbers of physical pains/discomforts and to suffer more from insomnia and depression. With respect to objective biometrics, respondents who have less access to rich nutrients at age 14 tend to attain a shorter stature, gain more weight as an adult, and are more likely to become obese or have low lung capacity. Taken together, the evidence in support of a harmful impact of late childhood undernutrition on adult health is stronger and more consistent for subjective health indicators than for the objective biometrics examined in this study. Moreover, the results also indicate that the long-term health impact of late childhood nutrition deprivation is especially detrimental for females in China.
21
Barrilli, Germano Henrique Costa, Evelise Nunes Fragoso de Moura, Odete Rocha, and José Roberto Verani. "The influence of black spot disease on the relative condition factor of Astyanax paranae Eigenmann, 1914 (Characiformes: Characidae) in Brazilian subtropical streams." Acta Scientiarum. Biological Sciences 43 (September 14, 2021): e56164. http://dx.doi.org/10.4025/actascibiolsci.v43i1.56164.
Full textAbstract:
Environmental disturbances and their consequences require constant studies to understand how communities and their ecological relationships respond to these processes. Through analysis of the host-parasite relationships, it is observed that the effect of these disturbances is variable and can change the physiology or behavior of organisms. Black spot disease, caused by endoparasitic helminths, is a pathology observed in natural environments, however, there is not much information about the consequences of this infestation. We separated the specimens from each stream into parasitized and non-parasitized groups, which were subjected to biometric analysis. The biometrics involved cysts count and weight-length measures, which were used to analyze the average relative condition factor. Additionally, we correlate these measures with the parasitic burden of infected individuals. Finally, the parasitized individuals were submitted to histological sections to recognize the parasite. The results demonstrate a low physiological condition in the parasitized group, when compared with non-parasitized groups from the same stream and from different streams. This suggests that pollution, in addition to effects of infestation worsen the fish condition. Besides, the parasite burden was negatively correlated with the condition factor, weight and length measures. We conclude that the parasite burden negatively affects Astyanax paranae individuals´ physiological condition and that trematodes also occur in polluted environments.
22
T. H. Lam et al., Tran. "Otolith biometrics and their relationships with fish sizes of Butis koilomatodon living in Mekong Delta, Vietnam." Egyptian Journal of Aquatic Biology and Fisheries 25, no. 3 (2021): 803–14. http://dx.doi.org/10.21608/ejabf.2021.181459.
Full text
23
Schnute, Jon T., and Laura J. Richards. "A Unified Approach to the Analysis of Fish Growth, Maturity, and Survivorship Data." Canadian Journal of Fisheries and Aquatic Sciences 47, no. 1 (1990): 24–40. http://dx.doi.org/10.1139/f90-003.
Full textAbstract:
This paper presents an approach to the analysis of growth, maturity, and survivorship data that unifies an extensive biometrics literature, particularly in fisheries and forestry. The model involves a probabilistic response y[Formula: see text] to a positive factor x[Formula: see text]. Because the relationship is asymptotic, the model can also be interpreted as a descriptor of biological growth, in which the asymptotic size is scaled to 1. The model generalizes earlier work by Gompertz, von Bertalanffy, Weibull, Richards, Chapman, and Schnute; it also extends the logit method introduced by Berkson. We identify reasonable curve families for the model, in which a transform parameter associated with x or y determines the curve shape, and we provide a complete analysis of curve types. We describe likelihood functions associated with two classes of data, typified by (1) size-at-maturity data and (2) time–mortality data. We illustrate the model's application to both data classes and show that it provides a useful extension to past methods of analysis.
24
Passinato, Érica Bevitorio, Francisco Oliveira de Magalhães Junior, Filipe Dos Santos Cipriano, et al. "Performance and economic analysis of the production of Nile tilapia submitted to different feeding management." Semina: Ciências Agrárias 36, no. 6Supl2 (2015): 4481. http://dx.doi.org/10.5433/1679-0359.2015v36n6sup2p4481.
Full textAbstract:
The productive performance and the variable cost of production were evaluated for different feeding strategies for tilapia during the production cycle. A sample of 2,000 juvenile tilapia was distributed (23.55 ± 2.38 g) into five treatments and with four repetitions as follows: C (feed consumption to apparent satiety), R20 (beginning feed restriction when fish reached an average weight of 20 g), R200 (beginning feed restriction when fish reached an average weight of 200 g), R400 (beginning feed restriction when fish reached an average weight of 400 g) and R600 (beginning feed restriction when fish reached an average weight of 600 g). The fish were given extruded commercial feed containing 34% crude protein until they reached a weight of 200 g, at which time they received feed containing 32% crude protein. Monthly biometrics were performed in order to determine the food restriction starting point, which was one day of restriction followed by six feeding days. The following parameters were evaluated: water quality, productive performance variables, the variable costs of production and excreted nitrogen. The results were subjected to analysis of variance, and the means were compared using Tukey’s test (5% significance). No statistical differences were observed in final weight, weight gain, feed consumption, feed conversion or survival. The fish from the R20 treatment had the lowest variable cost of production (g fish-1) and the lowest nitrogen excretion into the water. This suggests that feed restriction from the early stages of life does not compromise the productive performance and contributes to reducing the variable costs and the quantity of nitrogen excreted into the environment. Thus, a one-day per week feed restriction strategy can be applied from the earliest stages of life without compromising the productive performance or body composition of Nile tilapia. This strategy can also reduce variable costs of production by means of reducing relative labour and feed costs.
25
Silva, Fabricio Nilo Lima da, Osnan Lennon Lameira Silva, Raoani Cruz Mendonça, et al. "Checklist application to evaluate good management practices in aquaculture." Research, Society and Development 10, no. 1 (2021): e0310110296. http://dx.doi.org/10.33448/rsd-v10i1.10296.
Full textAbstract:
The objective of the study was to evaluate good management practices through a Checklist for aquaculture enterprises in the Marajó archipelago (Pará, Brazil). The research was carried out in the municipality of Curralinho, as part of the actions of the project “Transfer of technology through training and technical assistance for creators of tambaqui, Colossoma macropomum, in the archipelago of Marajó/PA” of the Federal Institute of the Pará (IFPA), Campus Breves, between September 2019 and January 2020. A total of 13 fish farms participated in the survey. The instrument for data collection was a checklist, which includes items related to the management of fish farming. After applying the checklist, it was possible to identify that the implementation of fish farming, identification of infrastructure, soil management and application of limestone, occurrence of diseases and storage of fry, presented levels of non-conformities between 75% to 79%. The items filters and anti-leak prevention, handling during the process of draining the tanks, stocking density and handling of fishing, presented levels of non-conformities between 80 - 89%. For the item soil disinfection the level of non-conformities was 94% and for the items: fertilization, protection of tanks with anti-bird nets, water quality, biometrics management, transfer management, cleaning procedures and equipment asepsis and the condition and safety of fish farming workers, presented levels of non-conformities varying between 95 - 100%. It was concluded that all sites are not suitable for good practices and therefore put the species' fish farming in the region at risk.
26
Albano, Marco, Claudio D’Iglio, Nunziacarla Spanò, et al. "New Report of Zu cristatus (Bonelli, 1819) in the Ionian Sea with an In-Depth Morphometrical Comparison with All Mediterranean Records." Fishes 7, no. 6 (2022): 305. http://dx.doi.org/10.3390/fishes7060305.
Full textAbstract:
Monitoring the occurrence and distribution of rare fish species is essential, especially in a semi-closed basin such as the Mediterranean Sea. Biologically interesting species often represent fishing waste (being part of the by-catch) and therefore are not retained, leading to a huge gap in data collection. Here we report about the occurrence in the Ionian Sea of a Zu cristatus (Bonelli, 1819) specimen, a mesopelagic fish from the order Lampriformes considered rare in the whole Mediterranean basin. The sample was captured at a depth of 720 m off the coast of Noto (Sicily, Italy) by deep-sea longline fisheries. The biometrics and meristic data were compared with all the available data on specimens previously reported in the Mediterranean Sea. It is interesting to note that, among the few records in the literature, most reports mention a lower depth range for this species. In fact, it is quite known that juvenile specimens of Z. cristatus were frequently found in shallow waters, while information about the biology of the adult stage is scarce, indicating they would seem to prefer much deeper environments. Considering the difficulty to collect data on this rare fish, this contribution can help to improve the knowledge about its distribution.
27
Singh, Yambem Tenjing. "Biometrics, condition index and meat yield of edible rock oyster, Saccostrea cucullata (Born, 1778)." Journal of the Marine Biological Association of the United Kingdom 99, no. 2 (2018): 385–92. http://dx.doi.org/10.1017/s0025315418000309.
Full textAbstract:
Rock oysters of the genus Saccostrea are the dominating group of filter-feeding communities on rocky beaches worldwide. The edible rock oyster (Saccostrea cucullata) is used as food and fish bait along the Indian coast. Morphometric analyses of S. cucullata from Baindur, Karnataka (India) were performed from June 2010 to May 2011, aiming to establish relationships between length and weight (total weight, shell weight, meat wet weight and meat dry weight). Morphometric relationships between length (L)-breadth (B) and length (L)-width (W) were B = 6.4952 + 0.4619 L and W = 3.1806 + 0.3276L, respectively. The equations of the length (L)-total weight (TW), length (L)-shell weight (SW), length (L)-meat wet weight (WW) and length (L)-meat dry weight (DW) were TW = 0.001227L2.3973, SW = 0.001165L2.3164, WW = 0.000037L2.1327 and DW = 0.000030L2.3289, respectively. The allometric growth pattern revealed changes in shell shape and weight variation throughout ontogeny in rocky habitats. The condition index and meat yield of S. cucullata exhibited seasonality, with higher values recorded during the periods post-monsoon and pre-monsoon.
28
Quiazon, K., T. Yoshinaga, H. Doi, J. Araki, and K. Ogawa. "First description of male Philometra thaiensis Moravec, Fiala et Dyková, 2004 (Nematoda: Philometridae) from the body cavity of the eyespot pufferfish Tetraodon biocellatus Tirant, and evolutionary relationships of this species with other dracunculoids as inferred from SSU rRNA gene sequences." Helminthologia 51, no. 3 (2014): 236–45. http://dx.doi.org/10.2478/s11687-014-0235-6.
Full textAbstract:
Abstract Finding male philometrid nematodes is essential for taxonomic identification among congeneric species. In this study, male Philometra thaiensis Moravec, Fiala et Dyková, 2004 were collected and described for the first time, from the body cavity of the freshwater fish (eyespot pufferfish) Tetraodon biocellatus Tirant (Tetraodontiformes, Tetraodontidae), and conspecific females were redescribed based on the additional morphological biometrics examined. Molecular examination was carried out on the small subunit 18S rRNA, revealing the evolutionary relationships of P. thaiensis and reported philometrid species (Philometra and Philometroides) from Japan with other dracunculoids deposited in the GenBank. Based on the molecular data, there are some genera (Philometra, Philometroides, Clavinema, and Margolisianum [genus inquirendum]) requiring further morphological re-evaluation that should be supported with molecular data.
29
Passinato, Érica Bevitorio, Francisco Oliveira de Magalhães Junior, Filipe Dos Santos Cipriano, et al. "Performance and economic analysis of the production of Nile tilapia submitted to different feeding management." Semina: Ciências Agrárias 36, no. 6Supl2 (2015): 4481. http://dx.doi.org/10.5433/1679-0359.2015v36n6supl2p4481.
Full textAbstract:
<p>The productive performance and the variable cost of production were evaluated for different feeding strategies for tilapia during the production cycle. A sample of 2,000 juvenile tilapia was distributed (23.55 ± 2.38 g) into five treatments and with four repetitions as follows: C (feed consumption to apparent satiety), R20 (beginning feed restriction when fish reached an average weight of 20 g), R200 (beginning feed restriction when fish reached an average weight of 200 g), R400 (beginning feed restriction when fish reached an average weight of 400 g) and R600 (beginning feed restriction when fish reached an average weight of 600 g). The fish were given extruded commercial feed containing 34% crude protein until they reached a weight of 200 g, at which time they received feed containing 32% crude protein. Monthly biometrics were performed in order to determine the food restriction starting point, which was one day of restriction followed by six feeding days. The following parameters were evaluated: water quality, productive performance variables, the variable costs of production and excreted nitrogen. The results were subjected to analysis of variance, and the means were compared using Tukey’s test (5% significance). No statistical differences were observed in final weight, weight gain, feed consumption, feed conversion or survival. The fish from the R20 treatment had the lowest variable cost of production (g fish-1) and the lowest nitrogen excretion into the water. This suggests that feed restriction from the early stages of life does not compromise the productive performance and contributes to reducing the variable costs and the quantity of nitrogen excreted into the environment. Thus, a one-day per week feed restriction strategy can be applied from the earliest stages of life without compromising the productive performance or body composition of Nile tilapia. This strategy can also reduce variable costs of production by means of reducing relative labour and feed costs. </p>
30
Farrag, Mahmoud M. S., Taha B. H. Soliman, El-Sayed Kh A. Akel, Alaa A. K. Elhaweet, and Mohsen A. Moustafa. "Molecular phylogeny and biometrics of lessepsian puffer fish Lagocephalus sceleratus (Gmelin, 1789) from Mediterranean and Red Seas, Egypt." Egyptian Journal of Aquatic Research 41, no. 4 (2015): 323–35. http://dx.doi.org/10.1016/j.ejar.2015.08.001.
Full text
31
Sadraddin, Avan Aladin, Bakhan Rafiq Hassan, Shaima Saleh Mahmood, Nasreen MohiAlddin, Raber Mahmud Rashid, and Karzan Namiq. "Biological and Health impact of Astaxanthin powders in common carp Cyprinus." Omni-Akuatika 15, no. 2 (2019): 52. http://dx.doi.org/10.20884/1.oa.2019.15.2.737.
Full textAbstract:
The effect of astaxanthin powders on biological, health and growth parameter of common carp Cyprinus carpio L. Fish weight varied between (59.2 –66.4gm)were studied for 10 weeks. four treatments(three replicates/treatment) were employed as follows: T1: Diet without any addition, T2: adding 2.5 gm astaxanthin powders / kg diet, T3: adding 5 gm astaxanthin powders / kg diet, T4: adding 7.5gm astaxanthin powders / kg diet. Twice daily feeding at 9:00 a.m. and 2:00 p.m. should be considered that the feeding rate of biomass weight after each took biometrics. Finally, blood samples were taken from the caudal vein of fish. The results showed no significant difference between treatments in terms of biological parameter (p>0.05). The results showed significant difference between treatments in terms of body indices, including Gonadosomatic, but no significant difference (p>0.05) Hepatosomatic, Spleenosomaticindex and Gill index. The results showed a significant difference between treatments in terms of growth performance (p<0.05), including weight gain, Relative growth rate and Specific growth rate. Group results of blood factors showed that between Granulocytes, Lymphocytes and Monocytes there was no significant difference between treatments (p>0.05). Lastly, we found that diets containing higher levels of Astaxanthin powders improve the growth performance, biological and GSI in common carp Cyprinus carpio L.
32
Escobar-Sierra, Camilo, Willemien de Kock, Harald Hasler-Sheetal, et al. "Metabolomics Unravels Grazing Interactions under Nutrient Enrichment from Aquaculture." Diversity 15, no. 1 (2022): 31. http://dx.doi.org/10.3390/d15010031.
Full textAbstract:
Our goal was to understand the mechanisms behind the impact of nutrient enrichment at intermediate distances from aquaculture on the interactions of a subtidal macroalgae community with its main grazer, the sea urchin Paracentrotus lividus. We assessed the diversity and cover of the macroalgal community, the abundance and biometrics of the sea urchins, the carbon and nitrogen elemental and isotopic compositions, and their metabolome in two stations, at an intermediate distance (station A) and away (station B) from a fish cage facility in the Aegean Sea (Greece), during the warm and cold seasons. The nutrient input at station A favored a shift to a macroalgal assemblage dominated by turf-forming species, depleted of native-erected species and with a higher abundance of invasive algae. A stable isotope analysis showed fish-farm-associated nitrogen enrichment of the macroalgae and trophic transfer to P. lividus. A decrease in metabolites related to grazing, reproduction, and energy reserves was found in P. lividus at station A. Furthermore, the metabolomic analysis was able to pinpoint stress in P. lividus at an intermediate distance from aquaculture. The chosen combination of traditional ecology with omics technology could be used to uncover not only the sublethal effects of nutrient loading but also the pathways for species interactions.
33
Baidoo, Kezia, Noble Kwame Asare, and Seth Mensah Abobi. "Length-Weight Relationship and the Condition Factor of some Important Estuarine Fish Species from Kakum Estuary of Ghana." Ghana Journal of Science, Technology and Development 8, no. 2 (2022): 88–103. http://dx.doi.org/10.47881/377.967x.
Full textAbstract:
This study assessed the length-weight relationships and the condition factors of nine commercial and abundant fish species namely Liza dumerilli, Mugil curema, Liza falcipinnis, Mugil bananensis, Lutjanus goreensis, Lutjanus fulgens, Sardinella aurita, Caranx hippos, and Eucinostomus melanopterus from the Kakum River Estuary. This study was conducted from November 2016 to April 2017 to provide primary information about the biometrics, the length-weight model parameters, and the state of well-being of fish species inhabiting the Kakum Estuary. Sampling was done monthly using a mini boat of 9 m long with a depth of 1.5 m for both diurnal (06:00, 10:00, 14:00, 18:00, 06:00 h) and nocturnal (22:00, 02:00 h) periods with a medium-mesh cast net of 20 mm stretched. Sampling was done within thirty (30) minutes on all sampling times. The total length of the species from the estuary ranged from 2.2 cm in Liza dumerilli to 29.8 cm in Mugil curema while the total weight ranged from 0.2 g to 251 g in Mugil curema. The slope b values of the species varied from 2.3787 for Liza dumerilli to 3.1009 for Eucinostomus melanopterus. Three species from the Kakum Estuary exhibited negative allometric growth and 6 species were growing isometrically. The mean condition factors of the fish species ranged from 0.82 ± 0.36 (SD) in Sardinella aurita to 1.82 ± 0.23 (SD) in Lutjanus goreensis. The results of the present study provide essential input parameters for further assessment of the species standing stock biomass.
34
Jusmaldi, Jusmaldi, Karisma Dewi, and Nova Hariani. "Biometrik dan Kematangan Gonad Ikan Selar Kuning (Selaroides leptolepis Cuvier, 1833) Pada Perairan Muara Badak, Kalimantan Timur." Al-Kauniyah: Jurnal Biologi 17, no. 1 (2023): 57–69. http://dx.doi.org/10.15408/kauniyah.v16i2.1.27010.
Full textAbstract:
AbstrakAspek biologis ikan Selar kuning Selaroides leptolepis (Cuvier, 1833) pada Perairan Muara Badak, Kalimantan Timur belum pernah diinformasikan. Penelitian ini bertujuan untuk menganalisis aspek biometrik dan kematangan gonad ikan Selar kuning. Pengumpulan sampel ikan dilakukan setiap bulan dari September hingga Desember 2021. Total 530 individu ikan dikoleksi menggunakan metode acak sederhana dari hasil tangkapan nelayan yang ikannya didaratkan di pelabuhan nelayan Toko Lima, Muara Badak. Panjang tubuh ikan diukur menggunakan kaliper digital dan bobot tubuh ditimbang menggunakan neraca digital. Hasil penelitian ini diperoleh panjang tubuh ikan berkisar 91,39–145,44 mm dan bobot 7,60–37,60 g. Modus dominan panjang tubuh ikan didapatkan pada rentang kelas 121,39–127,38 mm. Rasio kelamin adalah 1 jantan: 1,03 betina, yang menunjukkan rasio jenis kelamin seimbang. Hubungan panjang dan bobot tubuh memiliki koefisien korelasi yang kuat (r= 0,953), dengan persamaan regresi W= 0,0000003L3,281. Pola pertumbuhan allometrik positif dan nilai faktor kondisi relatif rata-rata 1,04 ± 0,060, yang mencerminkan kondisi pertumbuhan ikan relatif baik. Persentase tertinggi ikan matang gonad didapatkan pada bulan November dan Desember 2021, yang mengindikasikan ikan siap memijah. Kajian ini meginformasikan hubungan panjang dan bobot tubuh, pola pertumbuhan, faktor kondisi, rasio jenis kelamin, dan tingkat kematangan gonad ikan Selar kuning dari Perairan Muara Badak yang dapat digunakan untuk penilaian kesehatan populasi dan strategi pengelolaannya.AbstractBiological aspects of the Yellow-stripe scad Selaroides leptolepis (Cuvier, 1833) from Muara Badak Waters, East Kalimantan have never been informed anywhere. This research aimed to inform biometrics aspects and gonadal maturity of the Yellow-stripe scad. The collection of fish samples was carried out every month from September to December 2021. A total of 530 individual fish were collected using a simple random method from the catches of fishers who landed their fish at the Toko Lima fishing port, Muara Badak. Its body length was measured using a digital caliper and the body weight was weighed using a digital balance. The results of this research showed that the fish’s body length ranged from 91.39–145.44 mm and body weight ranged from 7.60–37.60 g. A modus of fish body length was found in the range class of 121.39–127.38 mm. The sex ratio is 1 male:1.03 female, which indicates a balanced sex proportion. The length and bodyweight relationship has a strong correlation coefficient (r= 0.953), with the regression equation was W= 0.0000003L3.281. The positive allometric growth and the relative condition factor value were an average of 1.04 ± 0.060, reflecting the fish’s relatively good growth conditions.The highest percentage of gonadal maturity of fishes was found in November and December 2021, which indicated that the fishes were ready to spawn. This research provides information on the relationship between length and body weight, growth patterns, condition factors, sex ratio, and gonadal maturity level of the Yellow-stripe scad from Muara Badak waters which can be used for population health assessment and management strategies.
35
Mura, Graziella. "Biometrics and Fatty Acid Composition of the Resting Eggs of Thamnocephalus Platyurus (Anostraca) in View of an Eventual Use as Fish Feed." Crustaceana 68, no. 5 (1995): 629–35. http://dx.doi.org/10.1163/156854095x00863.
Full textAbstract:
AbstractFairy shrimps have recently been considered for use in larval fish rearing, because of their size and their nutritional value. This study presents the results obtained for Thamnocephalus platyurus, a species from Central and South America, which was already mass cultured successfully in the United States in a flow-through system. Cysts and instar I nauplii have an unfavourably large size: mean diameter 278 μm and 240 μm for untreated and decapsulated cysts, respectively; mean naupliar length 436 μm. However, the species shows an interesting pattern in its fatty acid methyl ester (FAME) profile, especially with regard to polyunsaturated fatty acids (PUFA). In particular, T. platyurus cysts are characterized by significant levels of the 18:2 and the 20:5w3, and by the presence of the 22:6w3, which are normally absent in Artemia cysts.
36
Pereira, Ubatã Corrêa, Nataly Meira Matos, Romy Gleyse Chagas Barros, et al. "Influence of guava residue on tambaqui growth performance." Acta Scientiarum. Animal Sciences 44 (March 8, 2022): e54361. http://dx.doi.org/10.4025/actascianimsci.v44i1.54361.
Full textAbstract:
Fruit residues represent alternative ingredients that can be included in diets of tambaqui, Colossoma macropomum. This study evaluated the growth performance of tambaqui fed diets containing different levels of guava agroindustrial residue. The experiment was based on a completely randomised design, with 105 fish randomly distributed in 15 plastic 60 L-1 boxes with a water recirculation system. Feeding was carried out to apparent satiety for 45 days, using diets with 0, 50, 100, 150 and 200 g kg-1 inclusion of guava residue. Biometrics were performed every 15 days. Quadratic effect (p < 0.05) was observed for daily feed intake and apparent feed conversion, with optimum levels of 4.86 and 6.05% inclusion of guava residue, respectively. There was no significant difference (p > 0.05) in relation to final weight, weight gain, specific growth rate, hepato-somatic index, survival rate and protein efficiency rate by the dietary treatments. The inclusion of up to 150 g kg-1 of the guava agroindustrial residue in the feed did not compromise the performance of tambaqui juveniles.
37
Mura, Graziella. "Biometrics and Fatty Acid Composition of the Resting Eggs of Thamnocephalus Platyurus (Anostraca) in View of an Eventual Use as Fish Feed." Crustaceana 68, no. 8 (1995): 629–35. http://dx.doi.org/10.1163/156854095x01790.
Full text
38
Sánchez-Muros, M. J., E. Morote, C. Gil, J. J. Ramos-Miras, M. Torrijos, and J. A. Rodríguez Martin. "Mercury contents in relation to biometrics and proximal composition and nutritional levels of fish eaten from the Western Mediterranean Sea (Almería bay)." Marine Pollution Bulletin 135 (October 2018): 783–89. http://dx.doi.org/10.1016/j.marpolbul.2018.08.003.
Full text
39
Ullah, Md Rahamat, Md Mahamudul Hasan Mredul, Mohammad Ashraful Alam, Md Arifur Rahman, and Md Ariful Alam. "Weight-length, length-length relationships and form factor of three flatfish species from the Bay of Bengal, Bangladesh." Archives of Agriculture and Environmental Science 7, no. 4 (2022): 525–28. http://dx.doi.org/10.26832/24566632.2022.070407.
Full textAbstract:
Biometrics such as weight-length relationships (WLRs), length-length relationships (LLRs), as well as form factor (a3.0) were investigated for three flatfish species, Cynoglossus lingua, Cynoglossus arel, and Brachirus pan which were captured using seines and gill nets between September 2021 and March 2022 from the Bay of Bengal, Bangladesh. The lengths were measured to adjacent 0.1 cm accuracy with a digital caliper and weights to the accuracy of 0.01 g with a digital balance for each individual. The WLRs were accurately adjusted for all species (r2 > 0.9500). Brachirus pan had the lowest b value of 2.9543, whereas C. arel had the highest b value of 3.2924 amongst the three species. For the investigated species of fish, LLRs were also highly significant (r2 > 0.9600, p < 0.01). The estimated form factor values were 0.0023 for B. pan, 0.0026 for C. arel, 0.0027 for C. lingua. New maximum total lengths for C. arel and B. pan have also been recorded. Since there are no weight-length relationships (WLRs), length-length relationships (LLRs), as well as form factor (a3.0) data for these species in Bangladesh; the information supplied here expands the depth of knowledge for these species.
40
Odulate, D. O., A. O. Akinde, O. P. Oyetade, O. Y. Atobaale, S. O. Shorunke, and J. U. Ukulu. "Morphological features and length-weight relationships of <i>Sarotherodon galilaeus</i> from Oyan Lake, Southwestern Nigeria." Zoologist (The) 23, no. 1 (2023): 8–14. http://dx.doi.org/10.4314/tzool.v23i1.2.
Full textAbstract:
Oyan Lake is one of the major sources of fish protein supply to many parts of Southwestern Nigeria. Investigation was conducted on the biometrics, length-weight relationship and condition factor of Sarotherodon galilaeus in Oyan Lake. Fish samples were obtained from fishermen using gillnets, hook and line, cast nets and traps. One hundred and thirty samples of S. galilaeus were collected for the study, comprising eighty-three (83) males and forty-seven (47) females with sex ratio of 1:0.57 (male:female). The mean total lengths for combined sexes, males and females were 15.5±0.15, 15.7±0.19 and 15.3±0.26cm while the mean total weights were 81.0±2.78, 83.8±0.56 and 75.9±4.70g, respectively. No significant difference (p>0.05) was observed between mean total lengths of males and females. However, mean weight of males was significantly higher (p<0.05) than females. Mean eye diameter (EYD) and length of caudal peduncle (LCP) were significantly higher (p<0.05) in females. The range of number of pectoral rays (PRA) (12-14), number of pelvic rays (PVR) (4-5), number of anal spines (ANS) (2-3) and number of pelvic spines (PEVS) (1, no range) were the same in both sexes. There was strong correlation between weight/total length (r=0.93) and total length/length of dorsal fin base (r=0.72), while there was no correlation between body depth/head length. The mean condition factor (k) were 2.07±0.02 (combined sexes), 2.08±0.03 (males) and 2.03±0.03 (females). Growth was isometric for both sexes: males, 3.24 and females, 3.06. The results suggested that Oyan Lake is suitable for S. galilaeus.
41
Alt, Katharina G., Thomas Kuhn, Julian Münster, Regina Klapper, Judith Kochmann, and Sven Klimpel. "Mesopredatory fishes from the subtropical upwelling region off NW-Africa characterised by their parasite fauna." PeerJ 6 (August 8, 2018): e5339. http://dx.doi.org/10.7717/peerj.5339.
Full textAbstract:
Eastern boundary upwelling provides the conditions for high marine productivity in the Canary Current System off NW-Africa. Despite its considerable importance to fisheries, knowledge on this marine ecosystem is only limited. Here, parasites were used as indicators to gain insight into the host ecology and food web of two pelagic fish species, the commercially important species Trichiurus lepturus Linnaeus, 1758, and Nealotus tripes Johnson, 1865. Fish specimens of T. lepturus (n = 104) and N. tripes (n = 91), sampled from the Canary Current System off the Senegalese coast and Cape Verde Islands, were examined, collecting data on their biometrics, diet and parasitisation. In this study, the first parasitological data on N. tripes are presented. T. lepturus mainly preyed on small pelagic Crustacea and the diet of N. tripes was dominated by small mesopelagic Teleostei. Both host species were infested by mostly generalist parasites. The parasite fauna of T. lepturus consisted of at least nine different species belonging to six taxonomic groups, with a less diverse fauna of ectoparasites and cestodes in comparison to studies in other coastal ecosystems (Brazil Current and Kuriosho Current). The zoonotic nematode Anisakis pegreffii occurred in 23% of the samples and could pose a risk regarding food safety. The parasite fauna of N. tripes was composed of at least thirteen species from seven different taxonomic groups. Its most common parasites were digenean ovigerous metacercariae, larval cestodes and a monogenean species (Diclidophoridae). The observed patterns of parasitisation in both host species indicate their trophic relationships and are typical for mesopredators from the subtropical epi- and mesopelagic. The parasite fauna, containing few dominant species with a high abundance, represents the typical species composition of an eastern boundary upwelling ecosystem.
42
Canteiro, Rita de Cássia S. A., and Edélti F. Albertoni. "Growth of immature Chironomus calligraphus (Diptera, Chironomidae) in laboratory conditions." Anais da Academia Brasileira de Ciências 83, no. 4 (2011): 1279–86. http://dx.doi.org/10.1590/s0001-37652011005000035.
Full textAbstract:
Chironomidae larvae are important macroinvertebrates in limnic environments, but little knowledge exists about their biometrics development characteristics. This study aims to describe the immature Chironomus calligraphus Goeldi, 1905 under laboratory conditions by the accomplishment of thirteen egg masses from eggs eclosion to adults emergency, at controlled room temperature (25ºC) and photoperiod (12-12h). Larvae were feed ad libitum with "Alcon Basic - MEP 200 Complex" fish food and commercial dehydrated Spirulina. The postures had a mean length of 9 ± 1 mm (n = 13) and 348 ± 66 eggs. The brownish colored eggs with elliptical shape had length of 160.3 ± 17.7 µm (n = 130), being arranged as an organized string in a pseudo spiral form. The time duration from the first to the four instars were three, four, four and eight days, and the average length of a cephalic capsule to each one of the instars (66.3 ± 12.3 µm, 102.9 ± 22.1 µm, 159 ± 24.6 µm, 249.2 ± 29.7 µm, n = 456) were significantly different (ANOVA, p < 0.001). The Dyar’s Rule showed a constant growth rate, r = 1.5. Our results demonstrated that C. calligraphus is a species with short life cycle, low mortality rate, food adaptability, fast larval growth and easily maintained at laboratory, factors that allowed the use of this native species as a tool for ecotoxicological tests.
43
Sousa, Fabrício Barros de, Hélio Beltrão, Rodrigo Yudi Fujimoto, Raimundo Aderson Lobão de Souza, Severino Adriano de Oliveira Lima, and Raniere Garcez Sousa. "Biometric and reproductive characteristics of the King Tiger Plecos Hypancistrus sp. “L-333” (Siluriformes: Loricariidae) endemic to the lower Xingu River (Pará, Brasil)." International Journal for Innovation Education and Research 9, no. 1 (2021): 336–52. http://dx.doi.org/10.31686/ijier.vol9.iss1.2905.
Full textAbstract:
This research analyzed the biometrics and reproductive characteristics of a group of Hypancistrus sp. L-333 (King Tiger Plecos) in order to gather biological information and aid the rearing of the species in captivity, thus supporting its natural conservation. This species has a natural distribution that is restricted to the lower Xingu River, and is currently threatened by the hydroelectric projects in the region. The acquired specimens were measured, weighed and classified according to sex based on morphometric characteristics (evidence of secondary sexual characteristics) that were later confirmed by dissection. A total of 32 individuals, 16 males and 16 females were identified. Although the length-weight ratio did not present significant differences, the results revealed that the species has secondary sexual dimorphism. The odontodes were more developed in the mid-lateral region of the body, post-dorsal region, caudal peduncle and in the first ray (ossified) of the pectoral fin in males. Histological analyses of the gonads confirmed that all of the fish were adult individuals. The diameter of the oocytes ranged from 0.14 to 2.0 mm, presented three distinct modes, and were synchronous in more than two groups, which evidences batch spawning. Fecundity was low, between 35 and 54 oocytes in the largest batch. This information is novel and important for the identification of reproductive groups, and is aimed at breeding in captivity so that these resources can be exploited in a sustainable way, without harming the already threatened natural stocks.
44
Virgen Rodríguez, Gerardo, Grecia Virgen Hidalgo, and Juan Pablo Alcántar Vázquez. "EVALUACIÓN DE UN ADITIVO ALIMENTICIO COMERCIAL EN EL DESEMPEÑO PRODUCTIVO DE LA TILAPIA DEL NILO CULTIVADA EN JAULAS FLOTANTES." Anales Científicos 85, no. 1 (2024): 50–59. http://dx.doi.org/10.21704/ac.v85i1.858.
Full textAbstract:
The production of Nile tilapia (Oreochromis niloticus) has gained great importance in Latin American aquaculture systems, being considered an excellent option for local producers and large companies. However, is commercial growth has generated problems associated with the appearance of diseases that cause an increase in mortality. Due to the above and in order to reduce the use of antibiotics, in recent years producers have begun to use food additives from natural sources. The objective of this study was to evaluate the effect of commercial feed additive on the productive performance of Nile tilapia grown in floating cages. Two treatments were evaluated, commercial food (control) and commercial food + food additive (0.5%), both fed three times a day for a period of 30 days. After the 30 days, the experiment was continued for another 30 days. In total, 450 fish per floating cage were used. Each treatment was carried out by quadruplicate. Biometrics were performed every 15 days, recording wet weight (PH) and total length (LT). The final survival was calculated, and with the PH and LT data obtained, the biomass gained (BG), the daily growth rate (TCD) and the condition factor (FC) were calculated. The results showed that the values of PH, BG, TCD and final survival were significantly higher (P < 0.05) in the treatment that received the feed additive compared to the control treatment from day 30 until the end of the experiment. The growth and survival obtained provide evidence supporting the use of food additives as a strategy by Nile tilapia producers to reduce mortality in commercial culture, without resorting to the use of antibiotics or similar substances.
45
Wagner, Robert G., Kristen M. Bellisario, and Ningning N. Kong. "Change in Doctoral Dissertation Topics in Forest Resources from US Universities Over Four Decades." Forest Science 68, no. 2 (2022): 228–38. http://dx.doi.org/10.1093/forsci/fxac004.
Full textAbstract:
Abstract Changes in forest resources expertise from 1978 to 2017, as measured by annual number of doctoral dissertations published on twenty topics, were examined. Using the ProQuest Dissertations and Theses Global database, titles and abstracts from 11,530 dissertations produced by fifty-six universities in the United States were selected. Automated content analysis and latent Dirichlet allocation were used to identify the optimal number of topic groupings among 7,742 dissertations that met selection criteria. Substantial differences were found in the pattern of publication among the twenty topics over time. The number of dissertations related to forest growth and silviculture; tree seedling propagation, physiology, and regeneration; and forest soil nutrients, ecology, and management declined over the past two decades. Dissertations related to forest wildlife management, including terrestrial wildlife ecology and management; wildlife food and nutrition; and fish ecology and management also declined during the same period. The number of dissertations in the fields of forest policy, politics, and social science; forest modeling, biometrics, and statistics; wood science; forest vegetation ecology; and avian ecology increased during the four decades. Dissertations published in the fields of forest economics, and forest entomology and pathology, remained relatively stable. Study Implications: We found decreasing production of doctoral dissertations focused on applied forest and wildlife management topics in recent decades. Declining doctoral-level expertise in applied fields after the early 2000s suggest that there may be reduced capacity to address practical problems facing both forest and wildlife managers. This decline also suggests that finding university instructors qualified to teach more applied forest and wildlife courses may have been more difficult over the past decade and possibly into the future. Our analysis indicated that the increased number of dissertations in adjacent sciences supporting forest resources has substantially increased capacity in these areas.
46
Buwono, Ibnu Dwi, Iskandar Iskandar, Yuniar Mulyani, and Ersyad Prayoga Laksono. "Biometric analysis on three offspring of transgenic mutiara catfish (Clarias gariepinus)." International Journal of Fisheries and Aquatic Studies 10, no. 3 (2022): 46–49. http://dx.doi.org/10.22271/fish.2022.v10.i3a.2685.
Full text
47
Wijopriono, Wijopriono, and Mahiswara Mahiswara. "PARAMETER BIOMETRIK HASIL TANGKAPAN PUKAT CINCIN DI LAUT JAWA TERKAIT DENGAN KERAGAAN SELEKTIVITAS." Jurnal Penelitian Perikanan Indonesia 14, no. 3 (2017): 285. http://dx.doi.org/10.15578/jppi.14.3.2008.285-293.
Full textAbstract:
Pukat cincin merupakan alat tangkap utama perikanan pelagis di Laut Jawa dengan sasaran kelompok ikan pelagis kecil. Nelayan menggunakan mata jaring ukuran 19 mm (bagian kantong) dan 25 mm (bagian badan dan sayap). Sementara itu, pemerintah telah menetapkan ukuran mata jaring minimal 25 mm (bagian kantong) dan 51 mm (bagian sayap). Penelitian terhadap pukat cincin telah dilakukan untuk mengevaluasi selektivitas alat tangkap tersebut dan resistensi nelayan dalam menerapkan regulasi yang telah ditetapkan. Evaluasi selektivitas dilakukan melalui pendekatan karakteristik biometrik. Wawancara dilakukan untuk mengetahui masalah resistensi nelayan terhadap regulasi. Berdasarkan pada perbandingan antara hubungan fungsional parameter biometrik ikan sasaran tangkap dan bukaan mata jaring, rentang ukuran panjang ikan yang terjerat telah diestimasi. Diketahui bahwa pada ukuran mata jaring yang sama, ikan dapat terjerat pada ukuran panjang cagak (FL) yang berbeda tergantung dari morfologi. Hasil estimasi maupun aktual ikan yang terjerat menunjukkan kecenderungan yang sama, di mana rata-rata ukuran D. russelli dan S. crumenophthalmus yang terjerat lebih kecil dari D. macrosoma maupun R. kanagurta. Fakta bahwa aktual rentang ukuran ikan yang terjerat 25% lebih kecil dan 13% lebih besar dari hasil estimasi. Hal ini, membuktikan ada pengaruh faktor konstruksi jaring, khususnya hanging ratio, dan perilaku ikan terhadap, selain ukuran mata jaring yang berpengaruh terhadap selektivitas. Masalah resistensi nelayan terhadap regulasi dibahas dalam tulisan ini. Purse seine is the main fishing gear for pelagic fisheries in Java Sea with target species of small pelagic fish. The fishers applied mesh size of 19 mm at the bunt and 25 mm at the body and wing. While, the government has established to use mesh size of not less than 25 mm for the bunt and 51 mm for the wing. Research on the purse seine was done to evaluate its selectivity and to identify technical problems related to the resistence of the fishers in applying mesh regulation issued. Selectivity was evaluated using biometric characteristic approach, while the technical problems were identified through interviews. Based on the comparison of functional relationships among biometric parameters of the target species against mesh opening, the ranges of fish size enmeshed were estimated. It was found that for the same mesh size, fishes can be enmeshed at different fork length (FL) depending on their morphology. Both estimated and actual fish enmeshed showed the same tendency, where average sizes of D. russelli and S. crumenophthalmus enmeshed were smaller than those of D. macrosoma and R. kanagurta. The fact that range of actual size was 25% smaller and 13% larger than that of estimated size. This result revealed the existing of factors other than mesh size that influenced the selectivity. These factors considered as net construction, especially hanging ratio, and fish behaviour. Technical problems related to the resistence of fishers to the mesh regulation issue were discussed in this paper.
48
Kamal, M.Sc, Dr Ir Mohammad Mukhlis, Dudi Muhammad Wildan, Tatag Budiardi, et al. "Biometric and biochemical characteristics of glass eels (Anguilla spp.) collected from Cimandiri Estuary, Sukabumi Regency." Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) 13, no. 4 (2023): 634–43. http://dx.doi.org/10.29244/jpsl.13.4.634-643.
Full textAbstract:
Glass eel viability determines the success of cultivation and governs the recruitment variability, as seeds in aquaculture and its wild population, respectively. This study aims to examine the quality of glass eel using biometric measurements coupled proximate contents. Glass eel collection was made montly by using lift-net like fishing gear in Cimandiry Estuary during December 2020 - April 2021. Biometric aspects were examined on length, weight, eye diameter, heart, and liver, whereas proximate was run on proteins, fats, carbohydrates, and ash. The results showed that length and weight steadily increased between month, though the condition factor was indifferent. Eye diameter and mouth opening confirm the vision of diurnal predatory fish. Heart and liver have demonstrated the metabolism capability and fast swimming fish favors to migratory catadromous fish. Proteins, fats, carbohydrates, and ash fluctuated between month, though insignificant between month comparison. No clear confirmation of proximate analysis on biometric characters. However, the glass eels with largest size in April might be best for aquaculture.
49
Tharwat, Alaa, Ahmed Abdelmonem Hemedan, Aboul Ella Hassanien, and Thomas Gabel. "A biometric-based model for fish species classification." Fisheries Research 204 (August 2018): 324–36. http://dx.doi.org/10.1016/j.fishres.2018.03.008.
Full text
50
Galicia, David, Griselda Pulido-Flores, Rafael Miranda, et al. "Hidalgo Fishes: Dataset on freshwater fishes of Hidalgo state (Mexico) in the MZNA fish collection of the University of Navarra (Spain)." ZooKeys 403 (April 17, 2014): 67–109. https://doi.org/10.3897/zookeys.403.7149.
Full textAbstract:
The state of Hidalgo (Mexico) is an important region from the point of view of biodiversity. However, there exists a significant gap in accessible knowledge about species diversity and distribution, especially regarding to freshwater ecosystems. This dataset comprises the sampling records of two projects developed in Hidalgo between 2007 and 2009 about the freshwater fish communities of Tecocomulco lake and rivers belonging to the Metztitlán Canyon Biosphere Reserve. It contains the taxonomic identity (species level) and basic biometric data (total length and weight) as well as date of collection and coordinates of more than 9000 specimens. This dataset is the primary result of the first and unrepeated exhaustive freshwater fish’s survey of Metztitlán Canyon Biosphere Reserve and Tecocomulco lake. It incorporates seven more species to the regional fish fauna, and new exclusive biometric data of ten species. This dataset can be used by studies dealing with, among other interests, North American freshwater fish diversity (species richness, distribution patterns) and biometric analyses, useful for the management and conservation of these areas. The complete dataset is also provided in Darwin Core Archive format.