Consulta: subjectFacets:"Niche breadth"
Registros recuperados: 14
Data/hora: 06/06/2024 11:55:25

Dietary Changes over Time in a Cai&amp;#231;ara Community from the Brazilian Atlantic Forest
Provedor de dados: 7
Autores: MacCord, Priscila L.; Universidade Estadual de Campinas; pmaccord@gmail.com; Begossi, Alpina; Universidade Estadual de Campinas; alpinab@uol.com.br.
Tipo: Peer-Reviewed Reports
Palavras-chave: Atlantic Forest; Brazil; Cai&amp;#231; Ara; Social-ecological resilience; Dietary change; Fish consumption; Animal protein; Food delocalization; Niche breadth.
Ano: 2006

Diet of the ichthyofauna associated with marginal vegetation of a mangrove forest in southeastern Brazil
Provedor de dados: 76
Autores: Corrêa,Michéle de O. D. A.; Uieda,Virgínia S.
The objective of this study was to analyze the diet of fish species that use the mangrove vegetation for shelter and feeding in a river southeastern Brazil. The fieldwork, including collecting and underwater observations, was carried out in the dry (July and August 2004) and in the rainy season (February and March 2005) in order to assess the existence of seasonal variation in the diets. Seven kinds of food items were consumed, two of plant origin and five of animal origin. Crustaceans predominated in the diet of most species, either in the form of unidentified fragments or discriminated in eight groups. The predominance of species using mainly a single food source (crustaceans, principally Ostracoda and Tanaidacea) and the existence of seasonal variation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feeding habit; Seasonal variation; Ontogenetic variation; Niche breadth.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000400020

Ecology of colonizing populations of the figfly Zaprionus indianus (Diptera, Drosophilidae) in Porto Alegre, Southern Brazil
Provedor de dados: 76
Autores: 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

Trophic interactions among sympatric zooplanktivorous fish species in volume change conditions in a large, shallow, tropical lake
Provedor de dados: 83
Autores: 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 &lt; 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

Riffle and pool fish communities in a large stream of southeastern Brazil
Provedor de dados: 83
Autores: 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

Comparative feeding ecology and habitats use of Crenicichla species (Perciformes: Cichlidae) in a Venezuelan floodplain river
Provedor de dados: 83
Autores: 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

Trophic ecology of the chiton Acanthopleura echinata on Chilean rocky shores
Provedor de dados: 97
Autores: 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

Resource use and coexistence of two syntopic hylid frogs (Anura, Hylidae)
Provedor de dados: 104
Autores: 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

Do local environmental factors structure the trophic niche of the splash tetra, Copella arnoldi? A test in an Amazonian stream system
Provedor de dados: 36
Autores: SOARES,Bruno Eleres; BENONE,Naraiana Loureiro; ROSA,Daniela Cristina Oliveira; MONTAG,Luciano Fogaça de Assis.
ABSTRACT Environmental variation affects the availability of spatial and trophic resources in Amazonian streams and may be important factors structuring the diet of fishes. We analyzed the diet composition and trophic niche breadth of the lebiasinid splash tetra, Copella arnoldi, aiming to evaluate how environmental variation in Amazonian streams affects the species’ trophic niche. Fish were captured and environmental factors were recorded in 20 streams in the Caxiuanã National Forest, in the eastern Amazon, in November 2010. We made a semi-quantitative analysis of stomach contents of 200 individuals. Copella arnoldi exhibited an omnivorous diet composed mainly of detritus and allochthonous invertebrates. Environmental variation (stream width, stream...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental variation; Lebiasinidae; Niche breadth; Trophic ecology; Brazilian Amazon.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000100054

Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil
Provedor de dados: 36
Autores: 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

DIET OF DIRECT-DEVELOPING FROGS (ANURA: CRAUGASTORIDAE: Pristimantis) FROM THE ANDES OF WESTERN COLOMBIA
Provedor de dados: 37
Autores: GARCIA-R,Juan Carlos; POSSO-GÓMEZ,Carmen Elisa; CÁRDENAS-HENAO,Heiber.
We studied the diet of 15 montane frog species of the genus Pristimantis (Craugastoridae) from the Andes of Western Colombia to determine the diet range, breadth of niche and overlap among species. We identified 499 prey items from stomach and intestinal contents of 154 specimens. Prey items were included in 74 different categories. The most common 15 prey categories accounted for 65 % of all frogs' diet. The invertebrate families Isotomidae, Chironomidae, Formicidae, and Tipulidae were the most abundant categories and accounted for 32 % of the frogs' diet. Ten of the 15 frog species were found with at least one item of Araneae. Coleoptera and Tipulidae were found in nine frog species, and Acari and Carabidae in eight frog species. In general, beetles were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colombia; Diet; Niche breadth; Niche overlap; Pristimantis; Western Cordillera.
Ano: 2015
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100009

Feeding ecology of the Neotropical otter Lontra longicaudis in the Lower Arroio Grande River, southern Brazil
Provedor de dados: 42
Autores: Souza,Kleisson S.; Bastazini,Vinicius A.G.; Colares,Elton P.
The present study was based on the analysis of spraints (n = 294) collected between December 2005 and November 2007. The importance of each type of prey was determined by absolute and relative frequency. Niche breadth was also estimated. The results were reported as mean (± SD) of relative frequencies. Fish were the main prey found in spraints (57.8 ± 7.0%). Fish from Callichthyidae family were the main prey, followed by Cichlidae, the species Hoplias malabaricus and the family Characidae. The frequencies of other fish and taxa were lower than 13.9% (absolute frequency) and 5.6% (relative frequency). Despite significant seasonal variations, (P = 0.001), niche breadth values were low in all seasons (0.39 ± 0.11). Therefore, Lontra longicaudis presented a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diet; Neotropical otter; Niche breadth; Seazonal; Southern Brazil.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100285

Extension of the geographical distribution of two anuran species for Rio Grande do Sul State, Brazil, with comments on natural history
Provedor de dados: 49
Autores: 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

Diet and trophic niche overlap of Boana bischoffi and Boana marginata (Anura: Hylidae) in southern Brazil
Provedor de dados: 49
Autores: Moser,Camila F.; Oliveira,Mateus de; Avila,Fernanda R. de; Dutra-Araújo,Diogo; Farina,Renata K.; Tozetti,Alexandro M.
Abstract: The species Boana bischoffi and Boana marginata are endemic to the Atlantic Forest, where they often occur in sympatry. There is a large gap in the knowledge of natural history of both species. In this study, we aimed to describe and compare the diet composition of B. bischoffi and B. marginata in the southern domain of the Brazilian Atlantic Forest. We analyzed the gastrointestinal contents of 43 individuals of B. bischoffi and 30 individuals of B. marginata. Both showed a high trophic niche overlap (0.90 Ojk). The most important prey categories for both species belonged to the orders Araneae and Coleoptera. The species niche breadth (Bsta) varied from 0.35 to 0.42, suggesting a generalist feeding behavior for both species. Our data provide...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Trophic ecology; Atlantic forest; Niche breadth; Amphibians.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000100502