Adaptação do epitélio branquial de peixes eurialinos, guaru (Poecilia vivipara), para água doce

• Autor(a) principal: Sabóia-Moraes, Simone Maria Teixeira de
• Data de Publicação: 2011
• Outros Autores: Saldiva, Paulo Hilário Nascimento, Silva, José Roberto Machado Cunha da, Yamada, Áureo Tatsumi, Aloia, Thiago Pinheiro Arrais, Hernandez-Blazquez, Francisco Javier
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Journal of Veterinary Research and Animal Science
• Texto Completo: https://www.revistas.usp.br/bjvras/article/view/34370
• topic: Guppy; Brânquias; Salinidade; Células mucosas; Morfologia; Guppy; Gills; Salinity; Mucous cells; Morphology

The south-american euryhaline fish Poecilia vivipara (BLOCH; SNEIDER, 1801), the guppy, is found both in estuary and river waters, which suggests high adaptability to environments of different salinity. In this work we studied the adaptation of the interlamellar, bars and rakers epithelia of the gills of estuary fish to freshwater conditions. The results reveal that the gill epithelia of Poecilia vivipara can adjust itself to freshwater by decreasing the VP of mucous cells of the interlamellar epithelium and increase the volumetric proportion (VP) of chloride cells. However, there was no evidence of similar morphological alteration in the rakers region. The epithelia of the rakers appears to be part of a different compartment that is less sensitive to variation of salinity.