Pseudobrânquia do guaru Poecilia reticulata (Peter, 1859): análise estrutural, morfométrica e histoquímica para detecção de glicoconjugados
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2013-05
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Resumo
The morphology, cytomorphometric parameters, and glycoconjugates present in the
pseudo-gill of guppy, Poecilia reticulata Peter, 1859 (Cyprinodontiformes: Poeciliidae),
were investigated by light microscopy coupled to image capture and analysis system, and
also by lectin histochemistry. The microscopic anatomy indicates that P. reticulata has a
glandular pseudo-gill formed by two lobes, located underneath the pharynx epithelium.
The organ is formed by vascularized parenchyma rich in pseudo-gill cells. This cell type
exhibits active cytophysiological state with an abundant system of biomembranes and lacking
of ostium in apical surface, which in turn is found in the mitochondria-rich cells of the
holobranch. This indicates that the pseudo-gill cells distinguishe from the holobranch cells
in their morphology, histochemistry and physiology. Due to these intrinsic characteristics,
the pseudo-gill of guppy fingerlings may have non-respiratory function in the initial phase
of their development. The characterization of guppy’s pseudo-gill could facilitate further
studies about the effect of water pollutants on biomonitor species, such as P. reticulata.
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Guaru, Poecilia reticulata, Brânquias, Células do cloro, Espécie bioindicadora, Guppy, Poecilia reticulata, Gills, Chloride cells, Biomonitor species
Citação
ROCHA, Thiago L.; SANTOS, Ana P. R.; SABÓIA-MORAIS, Simone M. T. Pseudobrânquia do guaru Poecilia reticulata (Peter, 1859): análise estrutural, morfométrica e histoquímica para detecção de glicoconjugados. Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 33, n. 5, p. 669-673, maio 2013.