Search
Now showing items 1-10 of 250
Factors regulating diversity and abundance of fish communities in Pantanal lagoons, Brazil
(Fisheries Management and Ecology, 2004-02-01) [Artigo]
The factors effecting fish species richness, evenness and relative abundance in 19 floodplain lagoons in the Pantanal (Brazil) were examined. Richness and evenness were strongly correlated with the lagoon's: (i) isolation ...
Factors affecting seed predation of Eriotheca gracipiles (Bombacaceae) by parakeets in a cerrado fragment
(Acta Oecologica: International Journal of Ecology, 2008-03-01) [Artigo]
Psittacids are important pre-dispersal seed predators. However, little is known about the parameters that may determine seed predation rates by these birds, such as plants' characteristics and microhabitat. Eriotheca ...
Natural and artificially-induced habitat complexity and freshwater fish species composition
(Fisheries Management and Ecology, 2005-02-01) [Artigo]
The effects of habitat complexity, induced by construction of artificial reefs, on the fish assemblages in the Barra Bonita reservoir, Brazil, and in the lotic zone immediately below the dam were studied. Four artificial ...
Factors determining the structure of fish communities in Pantanal lagoons (MS, Brazil)
(Fisheries Management and Ecology, 2001-04-01) [Artigo]
The fish communities of lagoons in the Nhecolandia Pantanal were studied to determine the factors which are responsible for the composition and abundance of species. Fishes were collected in 19 lagoons during August 1997, ...
Effects of sublethal doses of imidacloprid in malpighian tubules of africanized Apis mellifera (Hymenoptera, Apidae)
(Microscopy Research and Technique, 2013-05-01) [Artigo]
In Brazil, imidacloprid is a widely used insecticide on agriculture and can harm bees, which are important pollinators. The active ingredient imidacloprid has action on the nervous system of the insects. However, little ...
Morphological caste studies in the neotropical swarm-founding polistinae wasp Angiopolybia pattern (Lepeletier) (hymenoptera: Vespidae)
(Neotropical Entomology, 2008-11-01) [Artigo]
Neotropical swarm-founding wasps present polygynic colonies and a great variation in relation to caste differentiation, ranging from species in which queens and workers are similar in shape and size to those where variation ...
Prevalência de dislipidemia em indivíduos fisicamente ativos durante a infância, adolescência e idade adulta
(Arquivos Brasileiros de Cardiologia, 2011-10-01) [Artigo]
FUNDAMENTO: A prevalência de dislipidemias vem aumentando em diversas partes do Brasil, porém não é claro ainda quanto de exercício físico é necessário para se obter efeitos benéficos sobre os níveis de lipoproteínas ...
Morphometric relationships and indirect determination of the length frequency structure of the pirarucu, Arapaima gigas (Cuvier), in Brazilian Amazonia
(Fisheries Management and Ecology, 1999-12-01) [Artigo]
The pirarucu (giant red fish), Arapaima gigas (Cuvier), (Arapaimidae) is among the diverse fish resources of Amazonia which are threatened by over-exploitation. Little is known about the biology of this species despite its ...
Snake assemblage in a disturbed grassland environment in Rio Grande do Sul State, southern Brazil: Population fluctuations of Liophis poecilogyrus and Pseudablabes agassizii
(Annales Zoologici Fennici, 2007-11-20) [Artigo]
A mark-recapture study of a snake assemblage using pitfall traps with drift fences was carried out in a disturbed grassland environment (e.g. cattle breeding and cultivations), located in the Pampa Biome, in the central ...
Length-weight relationships, condition and population structure of the genus Atlantoraja (Elasmobranchii, Rajidae, Arhynchobatinae) in Southeastern Brazilian waters, SW Atlantic Ocean
(Journal of Northwest Atlantic Fishery Science, 2007-12-01) [Trabalho apresentado em evento]
During the present study, 107 specimens of Atlantoraja castelnaui, 188 of A. platana, and 770 of A. cyclophora, were obtained by commercial vessels operating in Southeastern Brazil from March 2005 to April 2006. Males of ...