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How the interplay between individual spatial memory and landscape persistence can generate population distribution patterns
(Elsevier B.V., 2012-12-01)
Recent studies have suggested that the long distance movements of some terrestrial mammals are not migratory, but rather nomadic. Moreover, the spatial heterogeneity and temporal predictability of resources were proposed ...
Environmental evaluation of metals in sediments and dragonflies due to sugar cane cultivation in neotropical streams
(Springer, 2008-11-01)
The use of fertilizers, containing different metals ions such as lead(II), chromium(III), cadmium(II), copper(II) and zinc(II), in the soil, for sugar cane cultivation, may cause impacts on the hydric resources of the ...
Assessment of body surface temperature in cetaceans: an iterative approach
(Instituto Internacional de Ecologia, 2004-08-01)
A transferência de energia térmica da superfície corporal para a água é provavelmente o aspecto mais importante do equilíbrio térmico em mamíferos marinhos, mas os respectivos cálculos dependem do conhecimento da temperatura ...
Serotonin and circadian rhythms
(Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio)Universidade de Brasília (UnB)Universidade de São Paulo (USP), 2010-12-01)
All mammal behaviors and functions exhibit synchronization with environmental rhythms. This is accomplished through an internal mechanism that generates and modulates biological rhythms. The circadian timing system, ...
Morfologia da glândula mamária de gambás da espécie Didelphis sp associada ao modelo marsupial
(Instituto Virtual da Biodiversidade (BIOTA/FAPESP), 2006-01-01)
Vertebrados com períodos gestacionais curtos, os marsupiais tendem a ter proles pequenas e dependentes. O período gestacional dos gambás varia de 14-15dias e os filhotes terminam o seu desenvolvimento no marsúpio e este ...
Hypoxic pulmonary vasoconstriction in reptiles: a comparative study of four species with different lung structures and pulmonary blood pressures
(Amer Physiological Soc, 2005-11-01)
Low O-2 levels in the lungs of birds and mammals cause constriction of the pulmonary vasculature that elevates resistance to pulmonary blood flow and increases pulmonary blood pressure. This hypoxic pulmonary vasoconstriction ...
Population genetic structure and dispersal in white-lipped peccaries (Tayassu pecari) from the Brazilian Pantanal
(Alliance Communications Group Division Allen Press, 2011-04-15)
In many mammals social organization promotes genetic structuring, which can be influenced by the dispersal pattern of the species. We analyzed the population genetic structure and dispersal of white-lipped peccaries (Tayassu ...
Frugivory by the fish Brycon hilarii (Characidae) in western Brazil
(Gauthier-villars/editions Elsevier, 2009-01-01)
Frugivory and seed dispersal have been poorly studied in Neotropical freshwater fishes. We studied frugivory and seed dispersal by the piraputanga fish (Brycon hilarii, Characidae) in the Formoso River, Bonito, western ...
A LINE2 repetitive DNA sequence from the cichlid fish, Oreochromis niloticus: sequence analysis and chromosomal distribution
(Springer, 1999-12-01)
We report the cloning and characterization of a long interspersed nucleotide element (LINE) fi-om a cichlid fish, Oreochromis niloticus, and show the distribution of this element, called CiLINE2 for cichlid LINE2, in the ...
Purification and properties of buffalo (Bubalus bubalis) erythrocyte hexokinase
(Elsevier B.V., 1997-10-01)
Buffalo erythrocytes contain one isozyme of hexokinase that apparently lacks microheterogeneity as shown by chromatographic properties. A single protein band was detected by means of Western blotting using an antibody ...