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Now showing items 1-10 of 38
Hemocitical responses to environmental stress in invertebrates: a review
(Environmental Monitoring and Assessment, 2011-06-01) [Artigo]
Although invertebrates are recognized by the great facility to accumulate pollutants present in their environment and many of them are used as sentinel species in biomonitoring studies, little is known about the impact of ...
Histochemical analysis of seed reserve mobilization in Passiflora edulis Sims fo. flavicarpa O. Deg. (yellow passion fruit) during germination
(Brazilian Journal of Biology, 2011-08-01) [Artigo]
In the present work, we analyzed the histochemical aspects of Passiflora edulis seeds reserve mobilization during the first ten days of germination. Our results showed that mainly lipids present in the endosperm are used ...
The size of excavators within a polymorphic termite species governs tunnel topology
(Animal Behaviour, 2011-12-01) [Artigo]
Caste polymorphism in termites may provide specialization for different tasks in a colony, generating a division of labour that promotes fitness. The influence of polymorphism has been widely studied for many termite ...
The Submandibular Musculature of Phyllomedusinae (Anura: Hylidae): A Reappraisal
(Journal of Morphology, 2011-03-01) [Artigo]
The submandibular musculature of 37 species of the five currently recognized genera of the subfamily Phyllomedusinae (Anura: Hylidae) is described; observations are made on the variation and ontogeny of these muscles. ...
Conserved Karyotypes in Cophomantini: Cytogenetic Analysis of 12 Species from 3 Species Groups of Bokermannohyla (Amphibia: Anura: Hylidae)
(Journal of Herpetology, 2011-03-01) [Artigo]
Bokermannohyla is one of the five genera included in the recently recognized tribe Cophomantini, of the hylid frog subfamily Hylinae. Although karyotypic diversity is relatively well known in two genera of Cophomantini, ...
Mechanisms of insulin secretion in malnutrition: modulation by amino acids in rodent models
(Amino Acids, 2011-04-01) [Artigo]
Protein restriction at early stages of life reduces beta-cell volume, number of insulin-containing granules, insulin content and release by pancreatic islets in response to glucose and other secretagogues, abnormalities ...
Morphology and protein content of hepatocytes in type I diabetic rats submitted to physical exercises
(Micron, 2011-07-01) [Artigo]
The importance of physical exercise practice in the treatment of diabetes has been reported in many studies recently, but only limited data can be found regarding its benefits on liver morphology and protein content of ...
Hyperalgesic and edematogenic effects of peptides isolated from the venoms of honeybee (Apis mellifera) and neotropical social wasps (Polybia paulista and Protonectarina sylveirae)
(Amino Acids, 2011-01-01) [Artigo]
Stings by bees and wasps, including Brazilian species, are a severe public health problem. The local reactions observed after the envenoming includes typical inflammatory response and pain. Several studies have been performed ...
Cardiorespiratory responses to hypoxia in the African catfish, Clarias gariepinus (Burchell 1822), an air-breathing fish
(Journal of Comparative Physiology B: Biochemical Systemic and Environmental Physiology, 2011-10-01) [Artigo]
The African catfish, Clarias gariepinus, possesses a pair of suprabranchial chambers located in the dorsal-posterior part of the branchial cavity having extensions from the upper parts of the second and fourth gill arches, ...
Partitioning the relative fitness effects of diet and trophic morphology in the threespine stickleback
(Evolutionary Ecology Research, 2011-07-01) [Artigo]
Background: Numerous models show that if morphology and diet are correlated, frequency-dependent competition will lead to fitness differences among phenotypically dissimilar individuals within a species.Hypothesis: Selection ...