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Journal articles on the topic 'Oreochromis urolepis'

Author: Grafiati

Published: 4 June 2025

Last updated: 23 June 2025

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1

Nyinondi, Christer S., Matern S. P. Mtolera, Aviti J. Mmochi, et al. "Assessing the genetic diversity of farmed and wild Rufiji tilapia ( Oreochromis urolepis urolepis ) populations using ddRAD sequencing." Ecology and Evolution 10, no. 18 (2020): 10044–56. http://dx.doi.org/10.1002/ece3.6664.

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2

Mulokozi, Deogratias P., Matern S. Mtolera, and Aviti J. Mmochi. "Spirulina (Arthrospira fusiformis) as a potential protein source in practical diets for fry mariculture of Rufiji tilapia (Oreochromis urolepis urolepis)." Western Indian Ocean Journal of Marine Science 18, no. 2 (2019): 57–67. http://dx.doi.org/10.4314/wiojms.v18i2.6.

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The effects on growth performance, feed utilization, survival and whole fish body proximate composition of replacing fishmeal (Rastrineobola argentea) with a locally available spirulina species (Arthrospira fusiformis) as a protein ingredient in the feed of Rufiji tilapia (Oreochromis urolepis urolepis) fry was examined. Fishmeal replacement with A. fusiformis was carried out at 5%, 15%, 25%, 35% and 100% (S5, S15, S25, S35 and S100), and the effect of the replacement was compared with the control diet (S0, 0% spirulina). Fish fry were stocked at an average initial weight of 0.57 g at 10 fish per 0.1 m3 and cultured for 60 days using full strength salt water (30-35 ppt). A. fusiformis was isolated from Momela Lake in Arusha National Park, Tanzania and propagated using selected culture media. It was observed that fish fry fed spirulina at a 5% fishmeal substitution level diet had better (p<0.05) final weight (8.48), average daily weight gain (0.132), specific growth rate (4.47), feed conversion rate (2.08) and protein efficiency ratio (1.37) compared to the control fish group. Growth performance in fish fed diet S15 was comparable with the control group (p>0.05). Spirulina supplementation had no effect on fish survival rates and meat quality. It appears that the Momella Lake spirulina may be an appropriate growth-stimulating plant protein when used as a feed additive in Rufiji tilapia mariculture.

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3

Morelos-Castro, Rosa M., Benjamín Aparicio-Simón, Ricardo García-Morales, et al. "Exploring the presence of tilapia species in a central western Mexican reservoir using mitochondrial DNA control region sequencing." Latin American Journal of Aquatic Research 52, no. 4 (2024): 575–85. http://dx.doi.org/10.3856/vol52-issue4-fulltext-3168.

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Oreochromis niloticus is the most important aquacultural species worldwide. Several countries are interested in repopulating natural or artificial reservoirs with the fry of tilapia (Oreochromis sp.) to develop new fisheries or to enhance the existing ones. However, as tilapia is considered an invasive species, it is essential to check the existence of the species in the place before releasing any fry. Characterization of tilapia species with meristic is unreliable because of existing morphological similarities among species. In this work, the composition of the tilapia species of Laguna El Mastranzo (LEM), Nayarit, Mexico, was explored for the first time through a molecular method using the mitochondrial DNA control region. Three tilapia species (Oreochromis niloticus, O. aureus, and O. urolepis) were found in LEM, and it was confirmed that the two commercial strains (Aquamol and Spring) intended for repopulation were O. niloticus. Seven haplotypes of mitochondrial DNA control region sequences were obtained: three in LEM, three in Aquamol, and one in Spring strains. Before repopulating any reservoir, a molecular verification strategy is recommended to avoid spreading the species. The results of this work represent a glimpse into the genetic material of LEM, Nayarit, Mexico.

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4

da Trindade Alfaro, Alexandre, Gustavo Graciano Fonseca, Evellin Balbinot, and Carlos Prentice. "Characterization of wami tilapia (Oreochromis urolepis hornorum) skin gelatin: microbiological, rheological and structural properties." Food Science and Technology International 20, no. 5 (2013): 373–81. http://dx.doi.org/10.1177/1082013213488776.

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5

Mbiru, Moses, Samwel Mchele Limbu, Sebastian W. Chenyambuga, et al. "Comparative performance of mixed-sex and hormonal-sex-reversed Nile tilapia Oreochromis niloticus and hybrids (Oreochromis niloticus × Oreochromis urolepis hornorum) cultured in concrete tanks." Aquaculture International 24, no. 2 (2015): 557–66. http://dx.doi.org/10.1007/s10499-015-9946-z.

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6

Ordinola-Zapata, Alberto, Paul Campaña-Maza, Carola Ortiz-Mogollón, et al. "Peces introducidos y potencialmente invasores en los departamentos de la Costa Norte del Perú. Una revisión sistemática." FIGEMPA: Investigación y Desarrollo 19, no. 1 (2025): e7318. https://doi.org/10.29166/revfig.v19i1.7318.

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Los peces introducidos pueden amenazar a la biodiversidad acuática. Perú es un país megadiverso; su costa norte (Tumbes, Piura, Lambayeque y La Libertad) presenta una mayor diversidad íctica que su centro y sur. En esta región existen especies introducidas; pero, no se ha encontrado una investigación que consolide los datos sobre las mismas. La investigación tuvo como objetivo preparar una revisión sistemática sobre peces introducidos y potencialmente invasores en la costa norte peruana. Siguiendo las pautas de Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) del 2020, se obtuvieron 2665 documentos de Scopus, WoS, ScienceDirect, SciELO, Pubmed y Google Académico, Tras eliminar documentos duplicados y aplicar los criterios de inclusión y exclusión, se seleccionaron seis documentos. Se añadieron ocho documentos obtenidos de otras fuentes. Se reportaron 12 especies introducidas: carpa (Cyprinus carpio), gambusia (Gambusia affinis), guppy (Poecilia reticulata), pez cola de espada (Xiphophorus hellerii), mojarra (Coptodon rendalli), tilapia azul (Oreochromis aureus), tilapia mosámbica (Oreochromis mossambicus), tilapia nilótica (Oreochromis niloticus), wami tilapia (Oreochromis urolepis), cobia (Rachycentron canadum), trucha arcoíris (Oncorhynchus mykiss) y carachama (Hypostomus sp.). De estas, cinco especies fueron cíclidos y tres poecílidos; once especies se encontraron en agua dulce, cinco en manglares y dos en el mar. Tumbes registró el mayor número de cuerpos de agua con especies introducidas, Piura registró la mayor cantidad de especies (ocho), mientras que en Lambayeque se reportó solo una especie en un cuerpo de agua. Siete especies: carpa, gambusia, guppy, tilapias (azul, mosámbica y nilótica) y trucha arcoíris tienen alto potencial invasor, pues se encuentran entre las 100 peores especies invasoras de Europa o del mundo. Los documentos evaluados solo han reportado la presencia de especies introducidas, sin profundizar en el impacto que han tenido en los ecosistemas; por lo que, sería recomendable realizar investigaciones en esa dirección.

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7

ZHU, HUAPING, ZHIGANG LIU, MAIXIN LU, et al. "Screening and identification of a microsatellite marker associated with sex in Wami tilapia, Oreochromis urolepis hornorum." Journal of Genetics 95, no. 2 (2016): 283–89. http://dx.doi.org/10.1007/s12041-016-0653-y.

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8

da Trindade Alfaro, Alexandre, Gustavo Graciano Fonseca, and Carlos Prentice-Hernández. "Enhancement of Functional Properties of Wami Tilapia (Oreochromis urolepis hornorum) Skin Gelatin at Different pH Values." Food and Bioprocess Technology 6, no. 8 (2012): 2118–27. http://dx.doi.org/10.1007/s11947-012-0859-9.

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9

Sardella, Brian A., and Colin J. Brauner. "The effect of elevated salinity on ‘California’ Mozambique tilapia (Oreochromis mossambicus x O. urolepis hornorum) metabolism." Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology 148, no. 4 (2008): 430–36. http://dx.doi.org/10.1016/j.cbpc.2008.05.006.

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10

da Trindade Alfaro, Alexandre, Gustavo Graciano Fonseca, Evellin Balbinot, Nilson Evelazio de Souza, and Carlos Prentice. "Yield, viscosity, and gel strength of wami tilapia (Oreochromis urolepis hornorum) skin gelatin: Optimization of the extraction process." Food Science and Biotechnology 23, no. 3 (2014): 765–73. http://dx.doi.org/10.1007/s10068-014-0103-7.

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11

D'Silva, Accio Moura, and O. Eugene Maughan. "Effects of Density and Water Quality on Red Tilapia (Oreochromis mossambicus × O. urolepis hornorum) in Pulsed-Flow Culture Systems." Journal of Applied Aquaculture 5, no. 1 (1995): 69–76. http://dx.doi.org/10.1300/j028v05n01_08.

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12

Lamtane, H.A., Y.D. Mgaya, and R.G. Bailey. "Effects of water quality, flooding episode and management variables on the fish yield from self-stocked ponds in lower Rufiji floodplain, Tanzania." Greener Journal of Agricultural Sciences 3, no. 5 (2013): 320–31. https://doi.org/10.15580/GJAS.2013.5.022613494.

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A study was conducted to determine fish yields from flood depended ponds in Rufiji floodplain, Tanzania. Eight ponds were constructed during dry season in two sites besides two floodplain lakes, Ruwe and Uba. These ponds were self-stocked with different fish species from the lakes. More than eight species were trapped and<em>Oreochromis urolepis, Labeo congoro and Clarias</em> species were considered as good candidates for aquaculture. Other small fish species were harvested immediately after flood recession and the three key species were cultured for the maximum of seven months. However, other species in small quantities were remained in the ponds for the whole period of experiment. Water quality parameters were monitored throughout the study period. The relationships between water quality variables and flooding events were determined using canonical correspondence analysis (CCA). Other parameters included in the relationships were fish density, manure and number of species trapped and cultured. Dissolved oxygen and pH decreased with time in both sites. Fish yields were influenced by some water quality, flooding episode and other management variables. Chlorophyll-<em>a</em> was the only environmental variable that showed a significant correlation with fish yield (P< 0.01).  Fish density and number of species trapped showed a significant effect on the fish yield (P<0.05). Re-connectivity between ponds and lakes was strongly positively correlated with yield. It can be concluded that some water quality variables, flooding and management parameters were responsible for the observed yield.

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13

Mbugani, John J., John F. Machiwa, Daniel A. Shilla, Dativa Joseph, Wahabu H. Kimaro, and Farhan R. Khan. "Impaired Growth Performance of Wami Tilapia Juveniles (Oreochromis urolepis) (Norman, 1922) Due to Microplastic Induced Degeneration of the Small Intestine." Microplastics 1, no. 3 (2022): 334–45. http://dx.doi.org/10.3390/microplastics1030025.

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Microplastics-induced histopathological changes in gastrointestinal tracts of fish have been widely reported. However, the translation of adverse effects in the gut to impacts on growth are understudied. This study investigated the effect of MP-induced small intestinal histomorphological changes on growth performance of Oreochromis urolepis juveniles. Sixty larvae were exposed in control (0), 1, 10, and 100 polyethylene microplastic particles (PE MPs)/mL treatment groups. On day 65, juveniles were euthanized, dissected, and biometric data were taken. Small intestine histomorphological lesion index (HLI) was calculated following histological preparation using routine hematoxylin and eosin procedure. Results showed increase in HLI proportional to PE MPs exposure dose. These deteriorations equally reduced growth in final weight, weight gain and total length (One-Way ANOVA, p > 0.05), and Specific Growth Rate (SGR) (Kruskal–Wallis Test, p > 0.05), though there were insignificant differences between treatment groups. Condition factors of fishes in control and 1 PE MPs differed significantly and with other treatment groups (Tukey HSD, p < 0.05). Small intestines HLI correlated significantly with growth pattern (Spearman, r = 1.00, p = 0.01), condition factors (Pearson, r = −0.995, p < 0.05), final weight, weight gain, and total length (Spearman, r = −1.00, p = 0.01) but not with SGR. The allometric growth pattern changed towards isometric corresponding to increasing HLI. These findings suggest that MPs damaged small intestine structure and thus impaired digestion and nutrients absorption functions which disrupted growth. Such effects may impair juveniles’ ability to escape enemies, find food, and eventually reproduce, and therefore require further study.

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14

Mbugani, John J., John F. Machiwa, Daniel A. Shilla, Wahabu Kimaro, Dativa Joseph, and Farhan R. Khan. "Histomorphological Damage in the Small Intestine of Wami Tilapia (Oreochromis urolepis) (Norman, 1922) Exposed to Microplastics Remain Long after Depuration." Microplastics 1, no. 2 (2022): 240–53. http://dx.doi.org/10.3390/microplastics1020017.

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The histopathological effects of microplastics (MPs) in the gastrointestinal tracts of fish following long-term exposure and depuration are relatively understudied. This study investigated histomorphological damage in the small intestine of Oreochromis urolepis larvae following 65 d exposure to 38–45 μm of polyethylene microspheres (PE MPs) and after a recovery period of 60 d. Larval fish were assigned to each treatment group (control, 1, 10 and 100 PE MPs), where ingestion and degenerative changes in the small intestine were examined using a routine hematoxylin and eosin staining technique. The results highlighted significant PE MPs ingestion and retention proportional to exposure dose (χ2 = 49.54; df = 2). Villi height and width and epithelial cell height were significantly affected and differed between treatment groups. Indices of damage to the small intestine organ (χ2 = 47.37; df = 2; p < 0.05) and reaction patterns of villi, epithelial, goblet and cryptic glandular cells, leucocytic infiltration and blood congestion revealed significant occurrence of alteration as PE MPs exposure dose increased. After the recovery period, no PE MPs were observed, and villi height, width and epithelial cells showed recovery with no significant difference between treatment groups. Organ indices declined (χ2 = 12; df = 2; p < 0.05) but remained significantly different between treatment groups, largely due to leucocytic infiltration (χ2 = 9.08; df = 2; p < 0.05). The study demonstrated that microplastics induced small intestinal wall degeneration, but recovery in young fish occurred slowly. The damage likely compromised its digestive function, which may affect growth and reproduction. This requires further research.

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15

Zhu, Hua Ping, Mai Xin Lu, Feng Ying Gao, Zhang Han Huang, Li Ping Yang, and Jian Fang Gui. "Chromosomal localization of rDNA genes and genomic organization of 5S rDNA in Oreochromis mossambicus, O. urolepis hornorum and their hybrid." Journal of Genetics 89, no. 2 (2010): 163–71. http://dx.doi.org/10.1007/s12041-010-0022-1.

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16

Zhu, Huaping, Zhigang Liu, Fengying Gao, et al. "Characterization and expression of Na+/K+-ATPase in gills and kidneys of the Teleost fish Oreochromis mossambicus, Oreochromis urolepis hornorum and their hybrids in response to salinity challenge." Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 224 (October 2018): 1–10. http://dx.doi.org/10.1016/j.cbpa.2018.05.017.

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17

Sardella, B. A. "Physiological, biochemical and morphological indicators of osmoregulatory stress in `California' Mozambique tilapia (Oreochromis mossambicus x O. urolepis hornorum) exposed to hypersaline water." Journal of Experimental Biology 207, no. 8 (2004): 1399–413. http://dx.doi.org/10.1242/jeb.00895.

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18

Zhu, Hua Ping, Mai Xin Lu, Zhang Han Huang, et al. "Karyotype analysis of Oreochromis mossambicus, O. urolepis hornorum and their hybrid based on Cot-1 DNA bands by fluorescence in situ hybridization." Aquaculture Research 42, no. 8 (2010): 1178–85. http://dx.doi.org/10.1111/j.1365-2109.2010.02706.x.

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19

Sardella, Brian A., Jill Cooper, Richard J. Gonzalez, and Colin J. Brauner. "The effect of temperature on juvenile Mozambique tilapia hybrids (Oreochromis mossambicus x O. urolepis hornorum) exposed to full-strength and hypersaline seawater." Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 137, no. 4 (2004): 621–29. http://dx.doi.org/10.1016/j.cbpb.2003.12.003.

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20

Leonard Mapenzi, Levinus, and Aviti John Mochi. "Role of Salinity on Growth Performance of Oreochromis niloticus♀ and Oreochromis urolepis urolepis♂ Hybrids." Journal of Aquaculture Research & Development 7, no. 6 (2016). http://dx.doi.org/10.4172/2155-9546.1000431.

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21

Young, Benjamin C., Riyadh H. Alfaggeh, Ibrahim AlMoutiri, and Winton Cheng. "Effects of High Salinity on Survival, Growth, and Reproductive performance of Red Tilapia (Oreochromis urolepis hornorum ♀× Oreochromis mossambicus ♂)." Israeli Journal of Aquaculture - Bamidgeh 74 (January 29, 2022). http://dx.doi.org/10.46989/001c.32371.

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22

Su, Huanhuan, Jiajia Fan, Dongmei Ma, and Huaping Zhu. "Identification and Characterization of Osmoregulation Related MicroRNAs in Gills of Hybrid Tilapia Under Three Types of Osmotic Stress." Frontiers in Genetics 12 (April 6, 2021). http://dx.doi.org/10.3389/fgene.2021.526277.

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Researchers have increasingly suggested that microRNAs (miRNAs) are small non-coding RNAs that post-transcriptionally regulate gene expression and protein translation in organs and respond to abiotic and biotic stressors. To understand the function of miRNAs in osmotic stress regulation of the gills of hybrid tilapia (Oreochromis mossambicus ♀ × Oreochromis urolepis hornorum ♂), high-throughput Illumina deep sequencing technology was used to investigate the expression profiles of miRNAs under salinity stress (S, 25‰), alkalinity stress (A, 4‰) and salinity–alkalinity stress (SA, S: 15‰, A: 4‰) challenges. The results showed that 31, 41, and 27 upregulated and 33, 42, and 40 downregulated miRNAs (P &lt; 0.05) were identified in the salt stress, alkali stress, and saline–alkali stress group, respectively, which were compared with those in the control group (C). Fourteen significantly differently expressed miRNAs were selected randomly and then validated by a quantitative polymerase chain reaction. On the basis of Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analysis, genes related to osmoregulation and biosynthesis were enriched in the three types of osmotic stress. In addition, three miRNAs and three predicted target genes were chosen to conduct a quantitative polymerase chain reaction in the hybrid tilapia and its parents during 96-h osmotic stress. Differential expression patterns of miRNAs provided the basis for research data to further investigate the miRNA-modulating networks in osmoregulation of teleost.

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23

Su, Huanhuan, Dongmei Ma, Huaping Zhu, Zhigang Liu, and Fengying Gao. "Transcriptomic response to three osmotic stresses in gills of hybrid tilapia (Oreochromis mossambicus female × O. urolepis hornorum male)." BMC Genomics 21, no. 1 (2020). http://dx.doi.org/10.1186/s12864-020-6512-5.

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24

Mbugani, John J., Daniel A. Shilla, Wahabu Kimaro, Dativa Joseph Shilla, and Farhan R. Khan. "Effect of Microplastic Exposure to the Reproductive Energy and Fecundity of Female Wami Tilapia (Oreochromis urolepis, Norman 1922) Fish." Environmental Quality Management 34, no. 2 (2024). http://dx.doi.org/10.1002/tqem.22330.

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ABSTRACTThere is mounting evidence indicating that microplastics (MPs, < 5 mm) cause reproductive dysfunction in fish, yet information on the long‐term effects of MP exposure remains scarce. In this study, Wami tilapia fries were exposed to 38–45 µm polyethylene (PE) MPs for their first 2 months in treatment groups of control (0 PE MPs/mL), 1, 10, and 100 PE MPs/mL (with 60 individuals per group in triplicates), and subsequently maintained in a ratio of 3 females to 1 male for an additional 5 months. Reproductive proxies and parameters of female fish health were calculated, and models were developed according to the Akaike information criterion (AIC) and no significant differences in fecundity, relative fecundity, hepatosomatic index (HSI), weight, length, gonadosomatic index, and oocyte packing density were found between treatment groups (one‐Way ANOVA, p > 0.05). However, condition factors varied significantly between treatment groups (Kruskal–Wallis Test, p = 0.006), with the control group differing significantly from the groups exposed to 1 PE MPs/mL (p = 0.007), 10 PE MPs/mL (p = 0.03), and 100 PE MPs/mL (p = 0.001). Fecundity showed strong correlations with weight and length in all treatment groups except the group exposed to 10 PE MPs/mL (weight: r = 0.471, p = 0.346; length: r = 0.688, p = 0.131) and showed insignificant correlations with condition factors and HSI. Multiple regression models revealed that weight significantly contributed to fecundity in all treatment groups except the group exposed to 10 PE MPs/mL. Histopathological analysis indicated damage to livers and small intestines proportional to the dose of PE MPs. This study demonstrates that long‐term exposure of fish to MPs has no significant effect on fecundity but impairs fish health, which could potentially jeopardize the quality of fish eggs and recruitment.

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25

Chale, FM. "Studies on the fisheries and biology of Oreochromis urolepsis (Pisces: Cichilidae) in the Mtera resorvoir (Tanzania)." Tanzania Journal of Science 30, no. 2 (2009). http://dx.doi.org/10.4314/tjs.v30i2.18397.

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