Francisco Tadeu Rantin

• Abstract

  The current proposal requests financial support for Dr. David McKenzie, a CNRS researcher from Montpellier, France, to maintain a research collaboration with Prof. F. Tadeu Rantin at the Department of Physiological Sciences, UFSCar, São Carlos, for a period of 4 months. The general objective is to investigate why individuals within animal species exhibit wide variation in complex physiolo…

  The respiratory physiology of fishes: ecological and evolutionary significance of individual variation, AV.EXT

• Abstract

  In fish, environmental hypoxia induces physiological adjustments detected mainly by branchial O2 chemoreceptors. Neuroepithelial cells (NECs) found in fish gill arches are morphologically similar to the mammalian chemoreceptors, being suggested as the putative O2-sensitive sites. The present study aims to determine the NECs distribution in the gas exchanging organs of the African catfish …

  Characterization of branchial neuroepithelial cells (putative O2 chemoreceptors) and c-Fos expression in central areas after hypoxic exposure in the African catfish (Clarias gariepinus), AP.R

• Abstract

  This collaborative project will use a facultative air breathing fish as a model to investigate the hypothesis that there are direct positive relationships among two physiological traits, intrinsic growth capacity and metabolic rate, and a "personality" trait, the tendency to take risks. Experiments will be performed on a population of 35 individually-tagged African catfish, Clarias gariep…

  Study on the individual variation in compensatory growth rate, metabolic rate and risk-taking behavior in an airbreathing fish, Clarias gariepinus, AV.EXT

(Only some records are available in English at this moment)

• Abstract

  In fish, environmental hypoxia is detected by O2 chemoreceptors, mainly located in the gills and orobranchial cavity, which trigger cardiorespiratory adjustments. The neuroepithelial cells (NECs), found in fish gill arches, are morphologically similar to the mammals O2 chemoreceptors and have been reported as putative O2 sensitive cells. The aim of the present study is to verify the distr…

  Characterization of neuroepithelial cells and expression of c-fos in central areas following hypoxic exposure in the African catfish (Clarias gariepinus), BP.DR

• Abstract

  Recent studies have shown that alternagin-C (ALT-C), a disintegrin-like protein purified from the venom of the snake urutu (R. alternatus), is able to induce in vivo angiogenesis and in vitro endothelial cell proliferation and migration. This molecule, therefore, has potential to be used in the pharmaceutical industry, as an adjuvant to pro-angiogenic therapies that are essentials in card…

  Effects of alternagin-C (ALT-C), a protein from venom of urutu snake (Rhinocerophis alternatus, previously known Bothrops alternatus), on fish cardiac contractility under normoxia and against tissue hypoxia, BP.PD

• Abstract

  Due to a probable difference between the heart of ectothermic and endothermic species in relation to the influx of calcium in excitation-contraction coupling, studies on cardiac contractility in fish, especially tropical and accessory air breathing, as the African catfish, Clarias gariepinus, become very important. In these animals the mechanisms of calcium control and functionality of th…

  In vitro cardiac function of the African catfish Clarias gariepinus, BP.IC

(Only some records are available in English at this moment)