Results 11 to 20 of about 15,494 (110)

Diversidade de membracídeos (Hemiptera, Membracidae) e sobreposição de recursos tróficos em área do semi-árido

open access: yesIheringia: Série Zoologia, 2012
Foram examinados 1.069 indivíduos de 13 espécies de membracídeos coletados em suas plantas hospedeiras, entre agosto de 2004 e setembro de 2005, em uma região do semi-árido da Paraíba, Nordeste do Brasil. Enchenopa concolor (Fairmaire, 1846) (31,6%) e E.
Antonio J. Creão-Duarte   +2 more
doaj   +1 more source

Seasonal dietary niche contraction in coexisting Neotropical frugivorous bats (Stenodermatinae)

open access: yesBiotropica, Volume 52, Issue 4, Page 749-757, July 2020., 2020
Abstract Tropical dry forests are characterized by punctuated seasonal precipitation patterns that drive primary production and the availability of fruits, seeds, flowers, and insects throughout the year. In environments in which the quantity and quality of food resources varies seasonally, consumers should adjust their foraging behavior to maximize ...
Jeremy Ryan Shipley, Cornelia W. Twining
wiley   +1 more source

Amplitud de nicho y selectividad alimentaria del borugo de páramo (Cuniculus taczanowskii) (Stolzmann 1885) en un bosque andino nublado (Zipacón Cundinamarca)

open access: yesRevista U.D.C.A Actualidad & Divulgación Científica, 2007
Cuniculus taczanowskii es una especie típica de la región andina amenazada por factores, como la fragmentación del paisaje y la cacería. El presente trabajo, se desarrolló con el objetivo de establecer la amplitud de nicho, la selección alimentaria, la relación entre la frecuencia de ocurrencia de los ítems alimentarios recuperados en materia fecal y ...
Karin Osbahr   +2 more
openaire   +3 more sources

Trophic structure of fish fauna along the longitudinal gradient of a first-order rural stream

open access: yesActa Limnologica Brasiliensia, 2015
Aim: This study evaluated the trophic structure of the fish assemblage along the longitudinal gradient of a first-order rural stream. Methods Fish were sampled by electrofishing technique in December 2007, September 2008 and March 2009, at three stretch
Jardel Nimet   +3 more
doaj   +1 more source

Feeding ecology of the Neotropical otter Lontra longicaudis in the Lower Arroio Grande River, southern Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2013
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
Kleisson S. Souza   +2 more
doaj   +1 more source

Diversidade e distribuição espaço-temporal de anuros em região com pronunciada estação seca no sudeste do Brasil Temporal and spatial distribution and diversity of anurans in a region with pronounced dry season in southeastern Brazil

open access: yesIheringia: Série Zoologia, 2007
As atividades antrópicas têm alterado profundamente os ambientes naturais e muitas vezes afetado a diversidade e distribuição dos anuros. O objetivo deste estudo foi investigar as seguintes questões: (1) qual a composição da anurofauna em uma região de ...
Tiago Gomes dos Santos   +2 more
doaj   +1 more source

Diet of the ichthyofauna associated with marginal vegetation of a mangrove forest in southeastern Brazil Dieta da ictiofauna associada à vegetação marginal de um mangue no sudeste do Brasil

open access: yesIheringia: Série Zoologia, 2007
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
Michéle de O. D. A. Corrêa   +1 more
doaj   +1 more source

Influência do nível hidrológico sobre a dieta de Leporinus reinhardtii (Characiformes, Anostomidae) em um reservatório do semiárido brasileiro

open access: yesIheringia: Série Zoologia, 2014
A Região Neotropical possui um elevado número de espécies de peixes de água doce, cujas adaptações para explorar diferentes tipos de alimento é particularmente evidente em reservatórios, refletindo numa considerável plasticidade alimentar.
Tatiane N. Medeiros   +3 more
doaj   +1 more source

Comments about some species abundance patterns: classic, neutral, and niche partitioning models Comentários sobre alguns padrões de espécie-abundância: modelos clássicos, neutros e de partição de nicho

open access: yesBrazilian Journal of Biology, 2008
The literature on species abundance models is extensive and a great deal of new and important contributions have been published in the last three decades.
FC. Ferreira, M. Petrere-Jr.
doaj   +1 more source

First Record of Pseudomyrmex acanthobius Emery in Brazilian Pantanal

open access: yesEntomoBrasilis, 2016
. Associations between ants and plants may be described, in some cases, as mutualisms. Ants use plant structures as sites for nesting and in return they offer protection against herbivory.
Rodrigo Aranda   +2 more
doaj   +1 more source

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