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Journal articles on the topic 'Abundance of individuals'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Morlon, Hélène, Ethan P. White, Rampal S. Etienne, et al. "Taking species abundance distributions beyond individuals." Ecology Letters 12, no. 6 (2009): 488–501. http://dx.doi.org/10.1111/j.1461-0248.2009.01318.x.

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Swengel, Ann B., and Scott R. Swengel. "Paradoxes of Poweshiek Skipperling (Oarisma poweshiek) (Lepidoptera: Hesperiidae): Abundance Patterns and Management of a Highly Imperiled Prairie Species." ISRN Entomology 2014 (January 19, 2014): 1–10. http://dx.doi.org/10.1155/2014/216427.

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Although Oarisma poweshiek sometimes occurred in localized abundance, its known range is centered on the highly decimated northern tallgrass prairie of North America. To aid its conservation, we analyze surveys from 1988 to 1997 of populations no longer being found. While we recorded 2403 individuals at 20 sites, five sites had 87% of individuals, while 12 sites had only 2% of individuals. Most surveys during O. poweshiek flight had zero individuals recorded. In peak vegetative characteristics for O. poweshiek, fire management had the highest mean abundance but the lowest median abundance and

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3

Mulyono, Sabella Friska S., Suhara Suhara, and Iwan Setia Kurniawan. "Abundance of Ordo Lepidoptera in The Land Conversion of Ciwidey Pine Forest." Al-Hayat: Journal of Biology and Applied Biology 5, no. 2 (2022): 113–22. https://doi.org/10.21580/ah.v5i2.12684.

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The study entitled "Abundance of Ordo Lepidoptera in The Land Conversion of Ciwidey Pine Forest" aims to obtain the information about the abundance of insects of the ordo Lepidoptera and the influence of climatic factors on the abundance. The research method used is descriptive method, the research design is belt transect, and the sampling techniques used are pitfall trap, hand sorting, beating tray, and insect net. There are 6 stations with 5 quadrants in each. The results of this study obtained 37 individuals from 10 species, 10 genus, and 6 families. Abundance at station one is worth of 2 i

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Qureshi, Mubassera, Shrey Pandya, Punita Parikh, and Chirag Tank. "Assessment of diversity indices and rank abundance curve for herbaceous community of Junaghad district of Saurashtra." INTERNATIONAL JOURNAL OF PLANT SCIENCES 17, OCAEBGD (2022): 23–27. http://dx.doi.org/10.15740/has/ijps/17/ocaebgd/23-27.

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This Research was aimed at studying diversity indices and plotting a Rank Abundance Curve for herbaceous plant community at Kapuriyavadi area located in Junagadh District of Saurashtra region. The study was conducted from July to September 2021-22. Five quadrats of 1mx1m size were randomly laid down in the study area in such a way that they include maximum vegetation cover. Total number of individuals of each plant species, Rank abundance curve and Simpsons and Shannon-Wiener indices were calculated. A total of 33 plant species were identified and listed.Brachiariasp.Cyanodondactylon and Phyll

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de Oyarzabal, Eleane, Lourdes García-García, Claudia Rangel-Escareño, et al. "Expression of USP18 and IL2RA Is Increased in Individuals Receiving Latent Tuberculosis Treatment with Isoniazid." Journal of Immunology Research 2019 (December 6, 2019): 1–13. http://dx.doi.org/10.1155/2019/1297131.

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Background. The treatment of latent tuberculosis infection (LTBI) in individuals at risk of reactivation is essential for tuberculosis control. However, blood biomarkers associated with LTBI treatment have not been identified. Methods. Blood samples from tuberculin skin test (TST) reactive individuals were collected before and after one and six months of isoniazid (INH) therapy. Peripheral mononuclear cells (PBMC) were isolated, and an in-house interferon-γ release assay (IGRA) was performed. Expression of chemokine ligand 4 (CCL4), chemokine ligand 10 (CXCL10), chemokine ligand 11 (CXCL11), i

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Sherman, CS, MR Heupel, SK Moore, A. Chin, and CA Simpfendorfer. "When sharks are away, rays will play: effects of top predator removal in coral reef ecosystems." Marine Ecology Progress Series 641 (May 7, 2020): 145–57. http://dx.doi.org/10.3354/meps13307.

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Shark abundances are decreasing on many coral reefs, but the ecosystem effects of this loss are poorly understood. Rays are a prevalent mesopredator in tropical coral reef ecosystems that are preyed upon by top predators like sharks. Studies have suggested reduced predator abundances lead to increases in mesopredator abundance (mesopredator release). We examined the relationship between top predator abundances and the abundance and behaviour of 2 small benthic ray genera using baited remote underwater video systems (BRUVS) across 6 countries. Where predators were more abundant, 2 genera of sma

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Manu, Gaspar, Martinus Baroleh, and Alex D. Kambey. "STUDI FITOPLANKTON DI DANAU TONDANO PROVINSI SULAWESI UTARA." JURNAL PERIKANAN DAN KELAUTAN TROPIS 6, no. 1 (2012): 13. http://dx.doi.org/10.35800/jpkt.6.1.2010.108.

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This research was conducted in Tondano Lake North Sulawesi for 3 month from June to August 2007. The research was aimed to identify species abundance of phytoplankton. Phytoplankton were collected by using a 40 μm large plankton net. Results showed that phytoplankton consisted of 32 genera. It also indicated that the highest individual abundance was shown by Fragillaria (2903 individuals), followed by Microspora (2349 individuals), Closterium ( 984 individuals), Zynema (803 individuals), Melosira (770 individuals), and Anabaena (693 individuals) respectively with monthly sampling the highest a

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Kamal, Abdullahi, Aliyu Abdulhamid Omar, Abdullahi Shamsudden, et al. "Diversity and Abundance of Butterfly Fauna (<i>Lepidoptera</i>) at Sa'adu Zungur University, Bauchi Main Campus, Nigeria." Dutse Journal of Pure and Applied Sciences 11, no. 1b (2025): 282–91. https://doi.org/10.4314/dujopas.v11i1b.30.

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The study was conducted to assess the diversity and abundance of butterfly species at Sa’adu Zungur University, Main Campus, Bauchi State. A total of three hundred and fifty-seven (357) individual butterflies were recorded across two different sites within the campus, and the study was conducted between July and August, 2024. These individuals were distributed among eleven (11) species belonging to three (3) families. The recorded species included Limenitis archippus, Danaus plexippus, Anthocharis sara, Colias harfordii, Pieris rapae, Nathalis iole, Heliopetes ericetorum, Hypolimnas misippus,

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Asni Johari, Pebi Triamaliah, Muswita, Upik Yelianti, and Muhammad Naswir. "Temporal variation in aphid abundance throughout cucumber plant growth stages." Open Access Research Journal of Biology and Pharmacy 10, no. 2 (2024): 022–27. http://dx.doi.org/10.53022/oarjbp.2024.10.2.0009.

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This study aims to analyze the abundance of aphids (Aphis gossypii) on cucumber plants (Cucumis sativus L.) during both the vegetative and generative growth phases in the agricultural land of the Jambi farming community. The research employs a descriptive exploratory approach. Data were collected using a total sampling technique, involving the counting of all aphids found on sampled cucumber plants. Measurements of air humidity, temperature, and light intensity were conducted during the observation period. The results revealed that during the vegetative phase, the highest abundance of aphids o

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Teston, José Augusto, and Danúbia Marcela Pereira Valente. "Population Fluctuation of Pseudalus limona (Lepidoptera, Erebidae, Arctiinae) in an Amazonian Savannah of the alter do chão environmental protection area, Santarém, Pará, Brazil." Revista Ouricuri 15, no. 1 (2025): 03–12. https://doi.org/10.59360/ouricuri.vol15.i1.a18042.

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The tiger moth (Lepidoptera: Erebidae: Arctiinae) Pseudalus limona Schaus, 1896 occurs almost exclusively in Brazil. The caterpillar of this polyphagous species primarily feeds on plants from the families Anacardiaceae, Connaraceae, Proteaceae, and Vochysiaceae. In this study, the population dynamics of P. limona were monitored monthly using light traps in an Amazonian savannah over a one-year period (June 2014 – May 2015). Population data were analyzed and correlated with meteorological variables—mean temperature, relative humidity, and rainfall—using multiple regression analyses. Analysis of

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11

Poulsen, Bent Otto, Niels Krabbe, Amy Frølander, Marcelo B. Hinojosa, and Carmen O. Quiroga. "A note on 20-species lists." Bird Conservation International 7, no. 3 (1997): 293. http://dx.doi.org/10.1017/s0959270900001611.

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Since our paper on the efficiency and biases of 20-species lists (Poulsen et al. 1997) went to press we have recognized a further two biases in the method, after discussions with C. Rahbek. We remarked in our paper that the abundance curves were behaving rather strangely and that “the importance of these phenomena needs to be investigated in more detail”. The behaviour may be due to the method setting constraints on the highest possible frequency, namely the number of times a species occurs in 20-species lists. This could affect the calculation of the expected abundances and hence the a-index.

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Pérez-Rojas, Diego A., Diego Escamilla-Quitián, María Fernanda Estupiñan-Tibaduiza, and Juan E. Carvajal‑Cogollo. "Annotated checklist of the amphibians and reptiles of the Santander highland, Colombia." Check List 16, no. 3 (2020): 611–20. http://dx.doi.org/10.15560/16.3.611.

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We characterize the amphibian and reptile fauna from four habitats of the Andean region of the department of Santan&shy;der, Colombia. Eight species were recorded, including four amphibians and four reptiles. The family Hylidae was represented by two species and had the greatest abundance of individuals at 241. Among reptiles, the family with the greatest diversity was the Colubridae, with two species, but the Dactyloidae had the greatest abundance, with seven individuals. The grassland habitat exhibited the greatest diversity, with five species found, and it was the habitat with the great

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Farahisah, H., N. Azizah, I. Dewiyanti, and C. Yulvizar. "Relationship of mangrove snail’s abundance (Cerithidea sp.) with mangrove density at mangrove ecosystem in Banda Aceh and Aceh Besar." IOP Conference Series: Earth and Environmental Science 1221, no. 1 (2023): 012057. http://dx.doi.org/10.1088/1755-1315/1221/1/012057.

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Abstract Mangrove snails are aquatic biota that inhabit in the mangrove ecosystem, they lives attached to mangrove trees or scattered on the substrate surface. The purposes of this study were to identify the species, distribution pattern, the abundance of mangrove snails (Cerithidea sp.) and their correlation with mangrove density, water and soil characteristics in mangrove ecosystem, Banda Aceh and Aceh Besar. The research sampling was started in April to May 2022. The samples were collected from 5 stations, and purposive sampling method was applied in order to select the sampling station. Th

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Barbar, Facundo, Gonzalo O. Ignazi, Fernando Hiraldo, and Sergio A. Lambertucci. "Exotic lagomorph may influence eagle abundances and breeding spatial aggregations: a field study and meta-analysis on the nearest neighbor distance." PeerJ 6 (May 10, 2018): e4746. http://dx.doi.org/10.7717/peerj.4746.

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The introduction of alien species could be changing food source composition, ultimately restructuring demography and spatial distribution of native communities. In Argentine Patagonia, the exotic European hare has one of the highest numbers recorded worldwide and is now a widely consumed prey for many predators. We examine the potential relationship between abundance of this relatively new prey and the abundance and breeding spacing of one of its main consumers, the Black-chested Buzzard-Eagle (Geranoaetus melanoleucus). First we analyze the abundance of individuals of a raptor guild in relati

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15

Marshall, Charles R., Daniel V. Latorre, Connor J. Wilson, et al. "Absolute abundance and preservation rate of Tyrannosaurus rex." Science 372, no. 6539 (2021): 284–87. http://dx.doi.org/10.1126/science.abc8300.

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Although much can be deduced from fossils alone, estimating abundance and preservation rates of extinct species requires data from living species. Here, we use the relationship between population density and body mass among living species combined with our substantial knowledge of Tyrannosaurus rex to calculate population variables and preservation rates for postjuvenile T. rex. We estimate that its abundance at any one time was ~20,000 individuals, that it persisted for ~127,000 generations, and that the total number of T. rex that ever lived was ~2.5 billion individuals, with a fossil recove

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16

McClintock, Brett T., Jason M. Hill, Lowell Fritz, Kathryn Chumbley, Katie Luxa, and Duane R. Diefenbach. "Mark-resight abundance estimation under incomplete identification of marked individuals." Methods in Ecology and Evolution 5, no. 12 (2013): 1294–304. http://dx.doi.org/10.1111/2041-210x.12140.

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17

Luiselli, Luca, Leonardo Sale, Godfrey C. Akani, and Giovanni Amori. "Venomous Snake Abundance Within Snake Species’ Assemblages Worldwide." Diversity 12, no. 2 (2020): 69. http://dx.doi.org/10.3390/d12020069.

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Venomous snakes are among the main sources of mortality for humans in rural regions, especially in tropical countries. In this study, a meta-analysis of quantitative community ecology studies on snake assemblages throughout the world was conducted in order to evaluate variation in the frequency of occurrence of venomous species and venomous individuals by habitat and continent. A bibliographic search was done by consulting “Google Scholar” and “ISI Web of Knowledge”. In total, 24,200 results were obtained from our bibliographic search, out of which 60 independent studies reporting raw and anal

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Kerschbaumer, Philip, Michael Tritthart, and Hubert Keckeis. "Abundance, distribution, and habitat use of fishes in a large river (Danube, Austria): mobile, horizontal hydroacoustic surveys vs. a standard fishing method." ICES Journal of Marine Science 77, no. 5 (2020): 1966–78. http://dx.doi.org/10.1093/icesjms/fsaa081.

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Abstract We tested a novel approach for fish abundance and size estimates along a 3.6-km reach in the main stem of a free-flowing section of the Danube River east of Vienna. We deployed an adaptive resolution imaging sonar (ARIS) with horizontal beam orientation from a moving boat in order to assess spatial and temporal fish abundance distributions in different mesohabitats. To validate the results obtained from imaging sonar, hydroacoustic abundance and fish length estimates were compared with those received from boat electrofishing surveys conducted at the same time and place. Furthermore, f

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Chaudhari, Hiren J., and Hiren B Son. "Avian Diversity in and around Wetland of National Importance ‘Pariyej Community Reservoir’, Gujarat, India." Current World Environment 18, no. 3 (2024): 1168–77. http://dx.doi.org/10.12944/cwe.18.3.20.

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The Pariyej Community Reservoir (PCR) is a freshwater reservoir in the Kheda district of Gujarat State, India. The PCR is also listed in Asian Directory of Wetlands. It is an important water storage reservoir; falls in the 4-B Gujarat Rajwara region of Central Gujarat, India. The present study was carried out for the period of one year (March, 2021 to February, 2022) to assess the status of avian diversity in terms of its species richness, abundance, and density. 116 bird species from 20 orders, 51 families, and 100 genera were documented. 75 species (64.4%) were resident, whereas 41 (35.3%) w

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Buen, Lorena López-de, and Juan Francisco Ornelas. "Frugivorous birds, host selection and the mistletoe Psittacanthus schiedeanus, in central Veracruz, Mexico." Journal of Tropical Ecology 15, no. 3 (1999): 329–40. http://dx.doi.org/10.1017/s0266467499000851.

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Frugivorous birds play an important role in parasitic mistletoe transmission among host species. The foraging behaviour and host selection of Psittacanthus schiedeanus mistletoe fruit-eating birds was studied in cloud forest remnants in Central Veracruz, México. Cedar waxwings, Bombycilla cedrorum, gray silky-flycatchers, Ptilogonys cinereus, and social flycatchers, Myiozetetes similis, eating ripe whole mistletoe fruits and defecating or regurgitating the seeds were observed. That variation in host species selection by frugivorous birds had a direct effect on mistletoe dispersion was hypothes

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Akinmuleya, C. B., and A. S. Adeyi. "Evaluation of Diversity and Abundance of Diptera, Hemiptera and Lepidoptera in Afuremo, Oye-EgboandFaalex Areas inOye-Ekiti, Ekiti State, Nigeria." Journal of Applied Sciences and Environmental Management 29, no. 3 (2025): 901–7. https://doi.org/10.4314/jasem.v29i3.28.

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This study aimed at evaluating the diversity and abundance of Diptera, Hemiptera and Orthoptera in Afuremo, Oye- Egbo and Faalex areas in Oye- Ekiti, Ekiti State, Nigeria from January to April 2024 using a combination of Sweep net, Pitfall, jarring and Active hunting methods. Data obtained reveals, a total of 333 individuals belonging to 3 orders, 26 families and 40 species were identified from Afuremo, Oye- Egbo and Faalex. Diptera was the most dominant order across the three study areas with 164 individuals. Out of these numbers 96 individuals were obtained from Afuremo, 21 individuals were

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Gwiazdowicz, Dariusz J., Bogna Zawieja, Izabella Olejniczak, Piotr Skubała, Anna K. Gdula, and Stephen J. Coulson. "Changing Microarthropod Communities in Front of a Receding Glacier in the High Arctic." Insects 11, no. 4 (2020): 226. http://dx.doi.org/10.3390/insects11040226.

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This study was carried out at Ny-Ålesund on Spitsbergen in Svalbard (High Arctic). Eight study sites were established along a transect from the fjord to the snout of the glacier. The sites differed from each other by the type of vegetation cover and soil characteristics. Soil samples were collected and placed in Tullgren funnels. Extracted arthropods were represented by two groups of mites (Mesostigmata and Oribatida) and springtails (Collembola). The pioneer species that occurred first after retreat of the glacier were representatives of the Collembola (Agrenia bidenticulata and Hypogastrura

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Croft, DB. "Kangaroo management: individuals and communities." Australian Mammalogy 26, no. 1 (2004): 101. http://dx.doi.org/10.1071/am04101.

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Kangaroo management plans for the commercial take of meat and hides and non-commercial population control focus on numbers (estimates of species abundance), proportions (quotas) and trends (sustainability of offtake). Effects on individuals and communities are too readily dismissed leading to inhumane treatment of dependent offspring and single species modelling in a multi-species community. I discuss the evidence for these deficiencies in current management plans and suggest actions and research to redress them.

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Whiteman, Noah Kerness, and Patricia G. Parker. "Body Condition and Parasite Load Predict Territory Ownership in the GaláPagos Hawk." Condor 106, no. 4 (2004): 915–21. http://dx.doi.org/10.1093/condor/106.4.915.

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Abstract We tested for associations between body condition, territory ownership, and permanent parasite load of Galápagos Hawks (Buteo galapagoensis) on Isla Marchena, Galápagos. Two louse species were collected from most of the 26 hawks sampled: the amblyceran Colpocephalum turbinatum and the ischnoceran Degeeriella regalis. Nonterritorial hawks were in significantly poorer body condition than territorial hawks. Body condition was negatively correlated with the abundance of C. turbinatum. Nonterritorial hawks had significantly higher mean abundances, mean intensities, and median intensities o

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25

Suhonen, Jukka, and Jukka Jokimäki. "Long-term species richness-abundance dynamics in relation to species departures and arrivals in wintering urban bird assemblages." European Journal of Ecology 5, no. 1 (2019): 1–10. http://dx.doi.org/10.2478/eje-2019-0002.

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Abstract Temporal dynamics of local assemblages depend on the species richness and the total abundance of individuals as well as local departure and arrival rates of species. We used urban bird survey data collected from the same 31 study plots and methods during three winters (1991–1992; 1999–2000 and 2009–2010) to analyze the temporal relationship between bird species richness and total number of individuals (abundance). We also evaluated local departures and arrivals of species in each assemblage. In total, 13,812 individuals of 35 species were detected. The temporal variation in bird speci

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Hussien, Mohamed Elmekki Ali Elbadawi. "Diversity and Abundance of Bird’s Species at Um Dum Island, Khartoum Province, Sudan." International Journal of Zoology and Animal Biology 6, no. 6 (2023): 1–14. http://dx.doi.org/10.23880/izab-16000525.

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This study focuses on bird diversity and abundance as well as their conservation status in Um Dum Island, Khartoum area, Sudan. Um Dum Island hosts distinctive biodiversity, there are a number of bird species that make the island exclusive and valuable for the local ecosystems therefore indicating the importance of Island not only for biodiversity but also for human survival, development and local health environment. The data collection used direct bird count method over six months of the study period, from June to December 2020 except October bird counts and identification surveys were conduc

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27

Tseng, Li-Chun, Ram Kumar, Hans-Uwe Dahms, et al. "Copepod community structure over a marine outfall area in the north-eastern South China Sea." Journal of the Marine Biological Association of the United Kingdom 88, no. 5 (2008): 955–66. http://dx.doi.org/10.1017/s0025315408001574.

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This study focuses on the dynamics of copepod abundances and species composition in the upper water column of a marine outfall area Tso-Ying (T-Y) in the boundary waters of the north-eastern South China Sea and the Taiwan Strait as an example. Zooplankton samples were collected in March, June and September 2002. Mean copepod abundance at all stations ranged from a minimum of 9.4 (individuals m−3) in March to a maximum of 1685 (individuals m−3) in June. A total of 66 copepod species belonging to 31 genera and 19 families were identified during three cruises. Copepod assemblages were dominated b

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Asni Johari, Desi Asmiarni, and Muhammad Naswir. "Analysis of the abundance of whitefly in the vegetative and generative phases of eggplant at the Solok botanical garden, Muaro Jambi: A case study of the local ecosystem." International Journal of Scientific Research Updates 8, no. 2 (2024): 185–88. https://doi.org/10.53430/ijsru.2024.8.2.0071.

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This study aims to analyze the abundance of whiteflies (Bemisia tabaci Genn.) during the vegetative and generative growth phases of eggplant (Solanum melongena L.) at the Botanical Garden of Solok Village, Muaro Jambi District. The type of research used is descriptive exploratory. The sampling technique was conducted using total sampling through hand collecting. Observations of whiteflies were made once a week for 12 weeks on 50 samples of eggplant planted in the experimental garden. Data analysis was performed by counting the number of whiteflies found on the eggplant during the vegetative an

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Piovesan, Paulo Ricardo Rodrigues, José Luís Campana Camargo, Robyn Jeanette Burnham, and Isolde Dorothea Kossmann Ferraz. "Abundance of liana species in an Amazonian forest of Brazil reflects neither adventitious root nor foliar sprout production." Journal of Tropical Ecology 34, no. 4 (2018): 257–67. http://dx.doi.org/10.1017/s0266467418000238.

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Abstract:Liana abundance and size have increased in neotropical forests. High vegetative reproductive capacity (clonality) may be the cause of high abundance in some liana species. Correlations between vegetative propagation capacity and (1) relative abundance of liana species, (2) rooting and foliar sprouting potentials of congeneric species, and (3) phylogenetic position were determined. Species selection was based on the relative abundance of lianas in ten 0.5-ha parcels in continuous forest within the Biological Dynamics of Forest Fragments Project (BDFFP), Brazil. Five individuals per spe

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Bibi, Faysal, and Juan L. Cantalapiedra. "Plio-Pleistocene African megaherbivore losses associated with community biomass restructuring." Science 380, no. 6649 (2023): 1076–80. http://dx.doi.org/10.1126/science.add8366.

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Fossil abundance data can reveal ecological dynamics underpinning taxonomic declines. Using fossil dental metrics, we reconstructed body mass and mass–abundance distributions in Late Miocene to recent African large mammal communities. Despite collection biases, fossil and extant mass–abundance distributions are highly similar, with unimodal distributions likely reflecting savanna environments. Above 45 kilograms, abundance decreases exponentially with mass, with slopes close to −0.75, as predicted by metabolic scaling. Furthermore, communities before ~4 million years ago had considerably more

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Ferreira, Aila Soares, Isabel Medeiros dos Santos Rocha, Bruno Cavalcante Bellini, and Alexandre Vasconcellos. "Effects of habitat heterogeneity on epiedaphic Collembola (Arthropoda: Hexapoda) in a semiarid ecosystem in Northeast Brazil." Zoologia 35 (May 23, 2018): 1–5. http://dx.doi.org/10.3897/zoologia.35.e13653.

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The spatial distribution of abiotic resources and environmental conditions can vary at small scales within terrestrial ecosystems, influencing the composition of soil fauna. Epiedaphic springtails (Collembola) of a semiarid Caatinga ecosystem were studied to determine if factors related to vegetation structure, such as species richness, aerial biomass, litterfall, and soil characteristics (pH, granulometry and soil organic matter), influence species richness and abundance of this group. A total of 5,513 individuals were collected of 15 species distributed in 13 genera and 9 families. The most

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Ferreira, Aila Soares, Isabel Medeiros dos Santos Rocha, Bruno Cavalcante Bellini, and Alexandre Vasconcellos. "Effects of habitat heterogeneity on epiedaphic Collembola (Arthropoda: Hexapoda) in a semiarid ecosystem in Northeast Brazil." Zoologia 35 (May 23, 2018): 1–5. https://doi.org/10.3897/zoologia.35.e13653.

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The spatial distribution of abiotic resources and environmental conditions can vary at small scales within terrestrial ecosystems, influencing the composition of soil fauna. Epiedaphic springtails (Collembola) of a semiarid Caatinga ecosystem were studied to determine if factors related to vegetation structure, such as species richness, aerial biomass, litterfall, and soil characteristics (pH, granulometry and soil organic matter), influence species richness and abundance of this group. A total of 5,513 individuals were collected of 15 species distributed in 13 genera and 9 families. The most

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Shaw, C. S., C. Swinton, M. G. Morales-Scholz, et al. "Impact of exercise training status on the fiber type-specific abundance of proteins regulating intramuscular lipid metabolism." Journal of Applied Physiology 128, no. 2 (2020): 379–89. http://dx.doi.org/10.1152/japplphysiol.00797.2019.

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Endurance training enhances the capacity for fat oxidation during exercise due to increased utilization of intramuscular lipid (IMCL). This study quantitatively investigated the impact of exercise training status on muscle fiber type-specific abundance of regulatory proteins involved in IMCL utilization. Endurance-trained [ n = 7 subjects, peak oxygen consumption (V̇o2peak) 62.6 ± 4.1 (SD) mL·min−1·kg−1] and non-endurance-trained ( n = 8 subjects, V̇o2peak 44.9 ± 5.3 mL·min−1·kg−1) young men completed an incremental exercise test to determine maximal fat oxidation (MFO) and maximal oxygen upta

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Buzas, Martin A. "Another look at confidence limits for species proportions." Journal of Paleontology 64, no. 5 (1990): 842–43. http://dx.doi.org/10.1017/s002233600001903x.

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In paleontological investigations the number of individuals of a particular species, ni, is often expressed as a proportion of the total number of individuals, ∑i=1S ni = n, for all, S, species. This proportion, p = ni/n expressed in percent, is referred to by various authors as percent species, relative abundance, percentage abundance, species frequency, fractional abundance, and so on. Naturally, researchers are interested in the confidence limits that can be placed on these estimates, and in the number of individuals required to obtain them. The binomial distribution was used by Dryden (193

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Syukur, Rinaldo, Juniartin Juniartin, and Lintal Muna. "Variabilitas Spasial Makrozoobenthos di Zona Pesisir Tropis: Studi Kasus dari Pantai Kastela, Ternate, Indonesia." International Journal of Science, Technology and Applications 2, no. 1 (2024): 38–46. https://doi.org/10.70115/ijsta.v2i1.226.

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Kastela Beach, located in Kastela Village, Ternate Island District, Ternate City, North Maluku, has main characteristics such as stretches of fine alluvial sand and an ecosystem of seagrass beds and coral reefs extending over 2 km. This research aims to identify the types of macrozoobenthos, study their distribution and abundance, and analyze the factors affecting them along the coast of Kastela Beach. The research was conducted using qualitative methods with an observational approach and quadrat analysis. The data analysis technique used the species abundance index according to the Ludwig and

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Clement, Matthew J., Sarah J. Converse, and J. Andrew Royle. "Accounting for imperfect detection of groups and individuals when estimating abundance." Ecology and Evolution 7, no. 18 (2017): 7304–10. http://dx.doi.org/10.1002/ece3.3284.

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Chaigneau, Alexis, François Talomonwo Ouinsou, Hervé Hotèkpo Akodogbo, et al. "Physicochemical Drivers of Zooplankton Seasonal Variability in a West African Lagoon (Nokoué Lagoon, Benin)." Journal of Marine Science and Engineering 11, no. 3 (2023): 556. http://dx.doi.org/10.3390/jmse11030556.

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This study aimed to investigate the seasonal variation of zooplankton diversity and abundance in the Nokoué Lagoon in southern Benin. Through extensive sampling, a total of 109 zooplanktonic taxa were identified and quantified. The average zooplankton abundance was found to be 60 individuals per liter, with copepods and rotifers being the most dominant groups, comprising 68.1% and 29.1% of the total abundance, respectively. The key factor identified as driving the structure of the zooplanktonic assemblages was salinity, which showed significant seasonal variation. The results revealed that dur

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Chaitanya, M., K. R. Mahendra, B. Manjunatha, and B. V. Jayanth. "Diversity and Relative Abundance of Insect Pests and Natural Enemies in Bacillus Treated Rice." Journal of Experimental Agriculture International 46, no. 8 (2024): 451–57. http://dx.doi.org/10.9734/jeai/2024/v46i82723.

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A field experiment was conducted at Indian Institute of Rice Research, Rajendranagar, Hyderabad to decipher diversity and relative abundance of insect pests, Hemipteran predators and Hymenopteran parasitoids in Bacillus treated rice crop during Rabi, 2020. Yellow pan traps, visual count, yellow sticky traps, sweep net and D-net methods were used for collecting insect specimens. A total of 777 individuals of pests belonging to 11 families, 920 predators belonging to 14 families and 3587 parasitoids belonging to 15 families were collected. The highest relative abundances of pests, predator and p

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Di Bitetti, Mario S., Agustín Paviolo, Carlos D. De Angelo, and Yamil E. Di Blanco. "Local and continental correlates of the abundance of a neotropical cat, the ocelot (Leopardus pardalis)." Journal of Tropical Ecology 24, no. 2 (2008): 189–200. http://dx.doi.org/10.1017/s0266467408004847.

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Abstract:As top predators, wild cats play a key ecological role in tropical forests, but little is known about the factors that regulate their abundance. This study looked for correlates of ocelot (Leopardus pardalis) abundance at two spatial scales. First, camera-trap surveys conducted in the Atlantic Forest of Misiones, Argentina, were used to test the hypothesis that selective logging and poaching affect the local abundance of this cat. Second, published density estimates (N = 21) were used to test the hypothesis that rainfall and latitude are correlated with the abundance of ocelots across

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Honěk, Alois, Zdenka Martinková, Marek Brabec, and Pavel Saska. "Predicting aphid abundance on winter wheat using suction trap catches." Plant Protection Science 56, No. 1 (2019): 35–45. http://dx.doi.org/10.17221/53/2019-pps.

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The relationship between the number of cereal aphids in flight (recorded by a national grid of suction traps in the Czech Republic) and their occurrence on winter wheat (in Prague) was established between 1999–2015. The flight of all the species was bimodal. Except for Rhopalosiphum padi, whose flight activity peaked in autumn, &gt; 80% of individuals were trapped during April to mid-August. The species frequency was different between the winter wheat and aerial populations. R. padi, the dominant species in the trap catches, formed a small proportion of the aphids on the winter wheat, whil

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Omifolaji, James Kehinde, Sunday Opeyemi Adedoyin, Emmanuel Tersea Ikyaagba, et al. "Population Abundance and Density Estimates of Poorly Documented Near-Threatened Calabar Angwantibo (Arctocebus calabarensis) in Oban Hills Region." Animals 14, no. 9 (2024): 1374. http://dx.doi.org/10.3390/ani14091374.

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Population abundance and density estimates play important roles in biodiversity conservation assessment and can lead to prioritization of conservation efforts, strategies, and management. The Calabar angwantibo (Arctocebus calabarensis) is a poorly studied, Near-Threatened nocturnal, arboreal mammal species occurring only in the lowland moist tropical rainforest blocks of southeastern Nigeria and southwestern Cameroon. Like other arboreal nocturnal mammals, there are gaps in knowledge of the distribution and abundance of this species, which may be facing population declines due to habitat loss

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Dantas, Vinícius de Lima, and Marco Antônio Batalha. "Can antiherbivory resistance explain the abundance of woody species in a Neotropical savanna?" Botany 90, no. 2 (2012): 93–99. http://dx.doi.org/10.1139/b11-087.

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The disturbance resistance model states that, in nutrient-poor communities, species more resistant to herbivory should dominate over the more palatable ones. Here we postulated that the disturbance resistance model should explain the species abundances in a nutrient-poor Neotropical savanna community. If so, the highly resistant species should be the commonest, whereas the poorly resistant ones should be rare. In an area of 2500 m2of woodland cerrado, a type of savanna, we measured the abundance of all 61 species as the total basal area and 9 antiherbivore defence traits from 10 individuals of

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Cowan, Diane F., Andrew R. Solow, and Andrew Beet. "Patterns in abundance and growth of juvenile lobster, Homarus americanus." Marine and Freshwater Research 52, no. 8 (2001): 1095. http://dx.doi.org/10.1071/mf01191.

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The combined effort of assessing abundance and measuring the time between settlement and recruitment is fundamental to forecasting future recruitment to the lobster fishery. This study represents the first monthly year-round sampling for abundance and in situ growth of juvenile lobster, Homarus americanus. Juvenile lobsters for repeated mark-recapture surveys were tagged in situ, so disturbance to the animals was minimal. From direct measurements of tagged individuals, lobsters up to 17 mm CL were estimated to be within their first two growing seasons. Some juveniles in the study area were rec

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Prendergast, Jeffrey A., William E. Jensen, and Stanley D. Roth. "Trends in Abundance of Hibernating Bats in a Karst Region of the Southern Great Plains." Southwestern Naturalist 55, no. 3 (2010): 331–39. https://doi.org/10.5281/zenodo.13435193.

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(Uploaded by Plazi for the Bat Literature Project) We analyzed temporal variation in abundance of hibernating bats from long-term records (1965–2004) in gypsum caves of the Red Hills of Kansas and Oklahoma, a region lying at peripheries of geographic ranges of four species of bats. Nonparametric correlation analyses were used to evaluate variation in abundances of five species among 12 hibernacula. Townsend's big-eared bat (Corynorhinus townsendii) showed no significant change in abundance among most of its hibernacula, but exhibited one increase and one decrease in abundance in two hibernacul

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Prendergast, Jeffrey A., William E. Jensen, and Stanley D. Roth. "Trends in Abundance of Hibernating Bats in a Karst Region of the Southern Great Plains." Southwestern Naturalist 55, no. 3 (2010): 331–39. https://doi.org/10.5281/zenodo.13435193.

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(Uploaded by Plazi for the Bat Literature Project) We analyzed temporal variation in abundance of hibernating bats from long-term records (1965–2004) in gypsum caves of the Red Hills of Kansas and Oklahoma, a region lying at peripheries of geographic ranges of four species of bats. Nonparametric correlation analyses were used to evaluate variation in abundances of five species among 12 hibernacula. Townsend's big-eared bat (Corynorhinus townsendii) showed no significant change in abundance among most of its hibernacula, but exhibited one increase and one decrease in abundance in two hibernacul

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Prendergast, Jeffrey A., William E. Jensen, and Stanley D. Roth. "Trends in Abundance of Hibernating Bats in a Karst Region of the Southern Great Plains." Southwestern Naturalist 55, no. 3 (2010): 331–39. https://doi.org/10.5281/zenodo.13435193.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We analyzed temporal variation in abundance of hibernating bats from long-term records (1965–2004) in gypsum caves of the Red Hills of Kansas and Oklahoma, a region lying at peripheries of geographic ranges of four species of bats. Nonparametric correlation analyses were used to evaluate variation in abundances of five species among 12 hibernacula. Townsend's big-eared bat (Corynorhinus townsendii) showed no significant change in abundance among most of its hibernacula, but exhibited one increase and one decrease in abundance in two hibernacul

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47

Prendergast, Jeffrey A., William E. Jensen, and Stanley D. Roth. "Trends in Abundance of Hibernating Bats in a Karst Region of the Southern Great Plains." Southwestern Naturalist 55, no. 3 (2010): 331–39. https://doi.org/10.5281/zenodo.13435193.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We analyzed temporal variation in abundance of hibernating bats from long-term records (1965–2004) in gypsum caves of the Red Hills of Kansas and Oklahoma, a region lying at peripheries of geographic ranges of four species of bats. Nonparametric correlation analyses were used to evaluate variation in abundances of five species among 12 hibernacula. Townsend's big-eared bat (Corynorhinus townsendii) showed no significant change in abundance among most of its hibernacula, but exhibited one increase and one decrease in abundance in two hibernacul

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48

Prendergast, Jeffrey A., William E. Jensen, and Stanley D. Roth. "Trends in Abundance of Hibernating Bats in a Karst Region of the Southern Great Plains." Southwestern Naturalist 55, no. 3 (2010): 331–39. https://doi.org/10.5281/zenodo.13435193.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We analyzed temporal variation in abundance of hibernating bats from long-term records (1965–2004) in gypsum caves of the Red Hills of Kansas and Oklahoma, a region lying at peripheries of geographic ranges of four species of bats. Nonparametric correlation analyses were used to evaluate variation in abundances of five species among 12 hibernacula. Townsend's big-eared bat (Corynorhinus townsendii) showed no significant change in abundance among most of its hibernacula, but exhibited one increase and one decrease in abundance in two hibernacul

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Hall, Karen, Colin D. MacLeod, Laura Mandleberg, Caroline M. Schweder-Goad, Sarah M. Bannon, and Graham J. Pierce. "Do abundance–occupancy relationships exist in cetaceans?" Journal of the Marine Biological Association of the United Kingdom 90, no. 8 (2010): 1571–81. http://dx.doi.org/10.1017/s0025315410000263.

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A positive relationship between the number of locations where a species occurs and the average density of individuals across those locations has been found in a wide variety of taxa and has been described as one of the most general and widespread relationships in macro-ecology. However, exceptions to this general rule have been found and this study tested whether abundance–occupancy relationships exist within the cetacean community of the west coast of Scotland. Data were collected in 2003–2006 and occupancy rates were calculated and compared to two density indices (relative density of groups

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Araújo, VA, SK Melo, APA Araújo, MLM Gomes, and MAA Carneiro. "Relationship between invertebrate fauna and bromeliad size." Brazilian Journal of Biology 67, no. 4 (2007): 611–17. http://dx.doi.org/10.1590/s1519-69842007000400004.

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Several bromeliads species store water and organic substrates, allowing the establishment of phytotelmata and associated fauna on their leaves. In this study, we sampled 70 individuals of Vriesea sp. (Carrière) (Bromeliaceae), in rupestrian fields in the Serra de Ouro Branco-MG, Brazil. The relationships between invertebrate species richness and abundance and size of bromeliads were tested using multiple regression. We found 19 species associated with bromeliads, mainly Diptera larvae. The abundance of the phytotelmate fauna increased principally in relation to the volume of water in the brome

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