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| Registros recuperados: 31 | |
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| Fracasso,Hélio Augusto Alves; Branco,Joaquim Olinto; Barbieri,Edison. |
| Despite being widely distributed in South America and having relatively large populations, little is known about the trophic ecology of the South American Tern (Sterna hirundinacea) and Cabot's Tern (Thalasseus acuflavidus). In Brazil, South American and Terns Cabot's breed in mixed colonies from the state of Espírito Santo to Santa Catarina. Here, we describe results of a study of the feeding ecology of these two species during the reproductive seasons of April to October of 2003, 2005 and 2006 from Cardos Island, Santa Catarina, Brazil. A total of 6248, 5140, and 4006 fishes were delivered to chicks or females by South American Terns; and 1157, 628 and 98 fish and or other prey items by Cabot's Terns during the breeding seasons of 2003, 2005, and 2006,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cabot's Terns; South American Terns; Feeding ecology; Prey; Foraging. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300016 |
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| Ávila Najera, Dulce María. |
| Durante el 2007 y 2008 en el ecotono (bosque de encino y bosque tropical) ubicado en el Ejido de San Nicolás de los Montes enclavado en la Huasteca Potosina se estudió la abundancia y densidad del jaguar (Panthera onca) y la abundancia relativa (IAR) de seis de sus presas potenciales, armadillo (Dasypus novemcinctus), coatí (Nasua narica), pecarí de collar (Pecari tajacu), venado temazate (Mazama temama), venado cola blanca (Odocoileus virginianus) y tuza real (Cuniculus paca). La abundancia del jaguar se estimó con base en trampeo fotográfico, la densidad por medio del programa de cómputo CAPTURE. El IAR se calculó con tres metodologías (transectos parcelas y trampas-cámara). Además, por medio de encuestas se determinó el índice de importancia... |
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Palavras-chave: Abundancia; Jaguar; Presas; Valor cultural; Conocimiento abundance; Jaguar; Prey; Cultural value; Knowledge. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/809 |
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| Ávila Najera, Dulce María. |
| Durante el 2007 y 2008 en el ecotono (bosque de encino y bosque tropical) ubicado en el Ejido de San Nicolás de los Montes enclavado en la Huasteca Potosina se estudió la abundancia y densidad del jaguar (Panthera onca) y la abundancia relativa (IAR) de seis de sus presas potenciales, armadillo (Dasypus novemcinctus), coatí (Nasua narica), pecarí de collar (Pecari tajacu), venado temazate (Mazama temama), venado cola blanca (Odocoileus virginianus) y tuza real (Cuniculus paca). La abundancia del jaguar se estimó con base en trampeo fotográfico, la densidad por medio del programa de cómputo CAPTURE. El IAR se calculó con tres metodologías (transectos parcelas y trampas-cámara). Además, por medio de encuestas se determinó el índice de importancia... |
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Palavras-chave: Abundancia; Jaguar; Presas; Valor cultural; Conocimiento abundance; Jaguar; Prey; Cultural value; Knowledge. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/785 |
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| Ávila Najera, Dulce María. |
| Durante el 2007 y 2008 en el ecotono (bosque de encino y bosque tropical) ubicado en el Ejido de San Nicolás de los Montes enclavado en la Huasteca Potosina se estudió la abundancia y densidad del jaguar (Panthera onca) y la abundancia relativa (IAR) de seis de sus presas potenciales, armadillo (Dasypus novemcinctus), coatí (Nasua narica), pecarí de collar (Pecari tajacu), venado temazate (Mazama temama), venado cola blanca (Odocoileus virginianus) y tuza real (Cuniculus paca). La abundancia del jaguar se estimó con base en trampeo fotográfico, la densidad por medio del programa de cómputo CAPTURE. El IAR se calculó con tres metodologías (transectos parcelas y trampas-cámara). Además, por medio de encuestas se determinó el índice de importancia... |
| Tipo: Tesis |
Palavras-chave: Abundancia; Jaguar; Presas; Valor cultural; Conocimiento; Abundance; Jaguar; Prey; Cultural value; Knowledge. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/1168 |
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| Ávila Nájera, Dulce María. |
| Durante el 2007 y 2008 en el ecotono (bosque de encino y bosque tropical) ubicado en el Ejido de San Nicolás de los Montes enclavado en la Huasteca potosina se estudió la abundancia y densidad del jaguar Panthera onca) y la abundancia relativa (IAR) de seis de sus presas potenciales, armadillo (Dasypus novemcinctus), coatí (Nasua Narica), pecarí de collar (Pecari tajacu), venado temazate (Mazama temama), venado cola blanca (Odocoileus virginianus) y tuza real (Cuniculus paca). La abundancia del jaguar se estimó con base en trampeo fotográfico, la densidad por medio del programa de cómputo CAPTURE. El IAR se calculó con tres metodologías (transectos parcelas y trampas-cámara). Además, por medio de encuestas se determinó el índice de importancia cultural... |
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Palavras-chave: Abundancia; Jaguar; Presas; Valor cultural; Conocimiento; Abundance; Prey; Cultural value; Knowledge; Maestría; Ganadería; Fauna silvestre. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/106 |
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| Avila Nájera, Dulce María. |
| Durante el 2007 y 2008 en el ecotono (bosque de encino y bosque tropical) ubicado en el Ejido de San Nicolás de los Montes enclavado en la Huasteca potosina se estudió la abundancia y densidad del jaguar Panthera onca) y la abundancia relativa (IAR) de seis de sus presas potenciales, armadillo (Dasypus novemcinctus), coatí (Nasua Narica), pecarí de collar (Pecari tajacu), venado temazate (Mazama temama), venado cola blanca (Odocoileus virginianus) y tuza real (Cuniculus paca). La abundancia del jaguar se estimó con base en trampeo fotográfico, la densidad por medio del programa de cómputo CAPTURE. El IAR se calculó con tres metodologías (transectos parcelas y trampas-cámara). Además, por medio de encuestas se determinó el índice de importancia cultural... |
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Palavras-chave: Abundancia; Jaguar; Presas; Valor cultural; Conocimiento; Abundance; Prey; Cultural value; Knowledge; Maestría; Ganadería; Fauna silvestre. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/106 |
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| Grose, Susan O.; Pendleton, Linwood; Leathers, Amanda; Cornish, Andrew; Waitai, Sheridan. |
| Climate change is expected to dramatically alter the distribution of many marine megafauna, impacting the people and economies that depend upon them. We build on the recent literature by developing a framework to describe the effects these changes will have on marine megafauna. With the goal to assist policymakers and grass roots organizers, we identify three illustrative pathways by which climate change drives these range shifts: (1) effects on habitat and shelter, (2) impacts on reproduction and disease, and (3) changing distribution of sources of food. We examine non-climate factors that may constrain or enable megafauna to adapt, creating winners and losers both for the species and the people dependent upon them. Finally, we comment on what management... |
| Tipo: Text |
Palavras-chave: Climate change; Marine megafauna; Habitat loss; Disease; Range shifts; Prey. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00641/75354/76152.pdf |
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| Oliveira,Elaine C. da S.; Tardin,Rodrigo H.; Poletto,Fabiana R.; Simão,Sheila M.. |
| The coordinated feeding tactics used by delphinids are influenced by differences in the distribution of prey species, season, and opportunities for social learning. In the present study, we compared the coordinated feeding behavior of two populations of the Guiana dolphin, Sotalia guianensis, in southeastern Brazil, and how these feeding tactics vary seasonality and in the presence of calves. We observed eight types of coordinated feeding tactics, which differed in frequency and in the mean number of individuals engaged in them, and between both areas. Feeding tactics used to herd and capture prey were the most frequent and engaged a greater number of individuals, suggesting that these tactics are better for capturing fish that gather in larger schools.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cetaceans; Coordinated hunt; Feeding tactics; Prey; Social behavior. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000600001 |
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| Mageski,Marcio Marques; Campinhos,Elaine Costa; Duca,Charles; Stein,Maria Carolina; Oliveira,Melissa Peron de; Clemente-Carvalho,Rute Beatriz Garcia. |
| Abstract Knowledge about the diet of anurans in different environments is essential to understanding important aspects of their trophic ecology. The bromeliad-frog Phyllodytes luteolus inhabits tank bromeliads in sandy coastal plains and lowland forests on the mainland, as well as a continental island in southeastern Brazil. In this work, we describe and analyze the diet of P. luteolus in three environments. We obtained the consumed prey items of 92 frogs (32 from sandy coastal plain, 32 from lowland forest and 28 from the island) via a stomach-flushing procedure. We found some variations in consumed prey composition and prey volume across populations, but ants represented the most important consumed prey in all environments. Only ants had a relative... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Lowland forest; Prey; Restinga; Trophic ecology. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100229 |
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| Pires,Mathias M.; Widmer,Cynthia E.; Silva,Claudio; Setz,Eleonore Z. F.. |
| Scat analysis is a valuable tool for the description and quantification of mammal diets. However, estimating the number of prey eaten using prey remains found in feces is difficult mainly due to differential digestibility of prey. In this context, we performed feeding trials with captive ocelots, Leopardus pardalis (Linnaeus, 1785), to evaluate the time needed until complete elimination in feces of different prey such as rodents and birds. Rodents took up to five days and birds two days until complete elimination. Our results are consistent in showing that elimination time differs for different prey and some prey may take a long time to be expelled, inducing errors in dietary studies. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Captive; Diet; Feeding trial; Prey. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000200019 |
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| Mendes,Simone M.; Bueno,Vanda H.P.; Carvalho,Lívia M.; Silveira,Luís Cláudio P.. |
| Effect of ninfal density of Aphis gossypii Glover, 1877 (Hemiptera, Aphididae) on feed consumption and biological aspects of Orius insidiosus (Say, 1832) (Hemiptera, Anthocoridae). The influence of different densities of A. gossypii (10, 20, 30, 40, 50, 60 nymphs/day) on consumption rate, development time, survival, and reproduction of Orius insidiosus (Say, 1832) was investigated. The trials were carried out in climatic chamber at 25 ± 1 °C, 70±10% RH, and photoperiod 12:12h (L:D). Consumption rates of nymphs and adults increased under a linear form as the densities of aphids increased. Development time was longest when reared in 10 nymphs density (15.4 days). Nymphal survival was different under the densities of A. gossypii and no significant difference... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological control; Development time; Generalist predator; Prey; Reproduction. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000100004 |
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| Shaiek, Moez; Romdhane, Mohamed Salah; Le Loc'H, Francois. |
| In order to define the structure of trophic network of Ichkeul Lake in Tunisia, diet of main teleost fish species was determined during two seasons, wet and dry. A total of 491 stomachs from 16 teleost species was analyzed. The analysis revealed spatial variability (East under marine influence and West with more continental effect) and temporal one (wet and dry seasons). Based on stomach contents, nine trophic groups were revealed, including eight monospecific groups. The main prey are mudflat snails (Hydrobia ventrosa, H. acuta), bivalves (Abra alba, Cerastoderma glaucum), amphipods and isopods, as well as seagrass (Potamogeton pectinatus, Ruppia cirrhosa) and water brackish algae (Ulva spp. and Chaetomorpha spp., Cladophora sp., Polysiphonia sp.). |
| Tipo: Text |
Palavras-chave: Ichthyofauna; Tunisia; Ichkeul Lake; Stomach contents; Prey; Diet; Trophic group. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00294/40541/73188.pdf |
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| Dias,Roberto Júnio P.; D'Agosto,Marta. |
| The objective of this study was to record and describe the morphological changes and the ingestion mechanisms of Frontonia leucas (Ehrenberg, 1833) according to the food type and to relate the food ingested with the different environmental conditions in a lotic system, namely São Pedro stream, located in the municipality of Juiz de Fora, Minas Gerais, Brazil. We sampled three points on a monthly basis from August 2002 to June 2003, each of which receiving different levels of untreated sewage. We prepared culture media for the ciliate specimens containing filtered water from each point and the types of food observed inside F. leucas (cyanobacteria, diatoms, desmids and testate amoebas). We observed the ingestion mechanisms of F. leucas in vivo, under a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciliate; Polluted stream; Predator; Prey. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000300021 |
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| CORRÊA,DANIELE N.; QUINTELA,FERNANDO M.; LOEBMANN,DANIEL. |
| ABSTRACT The snakes Erythrolamprus jaegeri jaegeri and Erythrolamprus poecilogyrus sublineatus are sympatric and syntopic in the coastal region of southern Brazil. Herein, we analyzed the diet composition to evaluate the niche breadth and the prey selection by both species. We examined 192 specimens, and analysis of stomach contents revealed that both species predominantly consume anurans. However, the diet of E. j. jaegeri consists mainly of fish and amphibians, whereas that of E. p. sublineatus is broader, including fish, amphibians, reptiles and mammals. The Standardized Levins Index presented lower values for E. j. jaegeri (BA = 0.17) than for E. p. sublineatus (BA = 0.61), evidencing specialist and generalist strategies for each species, respectively.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diet; Ophidians; Prey; Size; Niche. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100293 |
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| Birck,Tiago; Message,Hugo José; Baumgartner,Gilmar; Sebastien,Nyamien Yahaut; Baumgartner,Dirceu. |
| ABSTRACT The predator-prey relationships between juvenile Nile Tilapia Oreochromis niloticus and native fish species of the Paraná River basin, Brazil, were experimentally examined. Juveniles of O. niloticus were offered to three native predator species (Salminus brasiliensis, Pseudoplatystoma corruscans, and Brycon orbignyanus) in 2,000-L tanks with four levels of habitat complexity (0%, 50%, 100% and RD (rocks and driftwood)). Predator efficiency was more variable among species (S. brasiliensis consumed 86.6% of the prey, P. corruscans 22.5% and B. orbignyanus 18.3%) than among levels of habitat complexity, and S. brasiliensis was faster than the others in detecting and consuming the prey. The higher predatory efficiency observed for S. brasiliensis can... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Invasion; Management; Oreochromis niloticus; Predation; Prey. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300204 |
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| Kopf, R. Keller; Yen, Jian D. L.; Nimmo, Dale G.; Brosse, Sébastien; Villeger, Sébastien; Tittensor, Derek. |
| Aim The aim of this study was test whether maximum body mass and jaw length are reliable predictors of trophic position (TP) in fishes, and to compare linear and nonlinear machine‐learning (ML) models incorporating biogeography, habitat and other morphological traits. Location Global. Time period Modern. Major taxa studied Fishes. Methods We compiled a global database of TP (2.0–4.5), maximum body mass, jaw length, order, ecoregion, habitat and other morphological traits of freshwater, estuarine and diadromous fishes (n = 1,991). We used Bayesian linear mixed effects and ML, with r2 analogues and 10‐fold cross‐validation, to explain and predict TP. Results Random forest models outperformed Bayesian models in all comparisons. Jaw length was the most... |
| Tipo: Text |
Palavras-chave: Allometric trophic network models; Allometry; Body mass; Gape limitation; Machine learning; Predator– Prey; Random forest; Trophic network theory. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00661/77349/78823.pdf |
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| Registros recuperados: 31 | |
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