|
|
|
| Registros recuperados: 14 | |
|
|
| Montaña,Carmen G.; Winemiller,Kirk O.. |
| Feeding behavior and habitat use of two species of pike cichlids, or mataguaros, (Crenicichla lugubris and C. aff. wallacii) were studied in the río Cinaruco, a floodplain river in the Venezuelan llanos. We examined 309 individuals of C. lugubris and 270 individuals of C. aff. wallacii from both the main channel and lagoons throughout the falling-water phase of the annual hydrological cycle. Crenicichla lugubris was common within habitats that contained rocks or woody debris, whereas C. aff. wallacii was more abundant in lagoons than the main channel, especially within shallow areas containing leaf litter. Although we did not capture C. aff. wallacii in rocky shoals, they sometimes were observed in these habitats. Crenicichla lugubris was larger than C.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Llanos; Pike cichlid; Neotropics; Niche breadth; Venezuela. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200019 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Silva,Norma Machado da; Fantinel,Carina da Conceição; Valente,Vera Lucia da Silva; Valiati,Vitor Hugo. |
| Ecological parameters such as trophic niche overlap and niche breadth were computed from the frequency of all drosophilid species collected in 2001 and 2002, in the urban area of Porto Alegre city, Brazil. Independently of place, drosophilids community composition and components breeding or feeding sites, the highest frequencies of Zaprionus indianus (Gupta, 1970) were obtained during seasons with higher average temperatures, especially during summer. From a total of the 19,146 individuals of Z. indianus sampled, 80% were found in this season. The data of trophic niche breadth suggest a higher opportunism of adult flies in feeding substrate use, but the females are still selective in oviposition substrate choice. For the values of niche overlap, only for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drosophilids; Niche overlap; Niche breadth. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212005000300002 |
| |
|
|
| Caldart,Vinícius Matheus; Iop,Samanta; Santos,Tiago Gomes dos; Cechin,Sonia Zanini. |
| We record for the first time Crossodactylus schmidti (Anura: Hylodidae) and Proceratophrys avelinoi (Anura: Cycloramphidae) from Rio Grande do Sul State, Brazil, based on individuals captured in an area of Mesophytic Semideciduous Forest, the Parque Estadual do Turvo, located in the northwest region of the state. These records extend the geographical range for both species in about 60 km from the nearest known locality, the Municipality of San Vicente, Misiones, Argentina. We provide a characterization of the calling site used by males of Crossodactylus schmidti, and we also determined the niche breadth of P. avelinoi regarding to the use of water bodies. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Range extension; Calling site; Breeding site; Niche breadth; Habitat use; Parque Estadual do Turvo; Mesophytic Semideciduous Forest. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000300015 |
| |
|
|
| PRUDENTE,Bruno da S.; CARNEIRO-MARINHO,Pedro; VALENTE,Roberta de M.; MONTAG,Luciano F. de A.. |
| Abstract Studies on feeding ecology of fishes are important to understand the relationship between species and environmental seasonal variations. In tropical rivers, these relationships are mainly modeled by hydrological patterns. Thereby, this study aimed to assess the influence of fluviometric variation and life stage (juveniles and adults) in the feeding ecology of Serrasalmus gouldingi in the lower Anapu River region, located in Eastern Amazon, Pará, Brazil. Specimens were collected bimonthly, considering four different hydrological periods. We assessed the diet composition, feeding intensity and niche breadth of the species. Thirty-two dietary items were identified and grouped into ten categories. A total of 279 stomachs were analyzed, showing a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon basin; Diet; Flood pulse; Niche breadth; Repletion index. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000300259 |
| |
|
| |
|
|
| Menin,Marcelo; Rossa-Feres,Denise de C.; Giaretta,Ariovaldo A.. |
| The objectives of this study were to measure and compare niche breadth and overlap of males of Hyla nana Boulenger, 1889 and Hyla sanborni Schmidt, 1944 in three neighboring ponds. The measured niche dimensions were seasonal occurrence, call site, and diet. The reproductive season of H. sanborni was longer in permanent ponds, whereas H. nana had a longer reproductive season in the temporary pond. Call site characteristics were similar for both species, however H. sanborni called from higher perches than H. nana. Diptera (Nematocera) were the most consumed item by both species in the three ponds but, in general, H. nana ingested larger prey than H. sanborni. For both species, the consumption of prey types was correlated with the availability in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hyla; Multidimensional overlap; Niche breadth; Niche overlap; Resource partitioning. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000100008 |
| |
|
|
| Langeani,Francisco; Casatti,Lilian; Gameiro,Helena Seixas; Carmo,André Bellucco do; Rossa-Feres,Denise de Cerqueira. |
| The structure of the fish communities of a pool and a rapid in the ribeirão Santa Bárbara is described. This stream of 5th order is a direct tributary of the rio Tietê in the system of the upper rio Paraná. Thirty three species, from nine families and three orders, were referred in the two mesohabitats: the pool with 31 species, and the rapid with 18. Orders Characiformes, Siluriformes, and Perciformes presented the greatest number of species in the two mesohabitats. The families Characidae and Loricariidae were the most specious, followed by Cichlidae in the pool, and by Parodontidae in the rapid. Most species were accidental, 17 in the pool, and 10 in the rapid, and only six were constant in the two mesohabitats. The greatest diversity and evenness... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seasonality; Spatial distribution; Upper rio Paraná system; Niche breadth; Diversity; Adventitious streams. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000200009 |
| |
|
|
| CAMUS,PATRICIO A; NAVARRETE,ARTURO H; SANHUEZA,ÁLVARO G; OPAZO,L. FELIPE. |
| Polyplacophorans are common herbivores on rocky shores, but basic aspects of their ecology remain scarcely studied and their role within communities could be more complex than previously considered. Such is the case of Acanthopleura echinata (Barnes), one of the largest and most conspicuous chitons in the world, and at the same time, one of the least known intertidal species in the southeastern Pacific. To improve the basic ecological knowledge of this potentially important intertidal consumer, we studied the diet of A. echinata and its variation among sites of varying levels of coastal upwelling spread over 1000 km along the coast of northern Chile. A seasonal evaluation of diet, body size distribution and density at sites expected to vary in overall... |
| Tipo: Journal article |
Palavras-chave: Body size; Intertidal; Niche breadth; Omnivory; Upwelling. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000100010 |
| |
|
|
| Moncayo-Estrada,Rodrigo; Lind,Owen T; Escalera-Gallardo,Carlos. |
| Significant reductions in the water volume of shallow lakes impose a restriction on species segregation promoting more interactions in the trophic relationships. The diets of three closely related zooplanktivorous silversides belonging to the Atherinopsidae species flock of lake Chapala , Mexico, were analyzed at two sites (Chirostoma jordani, C. labarcae, and C. consocium). Diets were described in critical shallow (August 2000) and volume recovery conditions (August 2005). Diets included mainly cladocerans (Bosmina, Ceriodaphnia, and Daphnia) and copepods (Cyclops). A significant difference in diets was detected when comparing years (MRPP analysis, A = 0.22, p < 0.0001) and sites at different years (MRPP analysis, A = 0.17, p = 0.004). According to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Niche breadth; Silversides; Segregation; Water-level fluctuation. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100016 |
| |
| Registros recuperados: 14 | |
|
|
|
