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Adaptation of the gill epithelium of an euryhaline fish, the guppy (Poecilia vivipara), to freshwater / Adaptação do epitélio branquial de peixes eurialinos, guaru (Poecilia vivipara), para água doce
Moraes, Simone Maria Teixeira de Sabóia; Saldiva, Paulo Hilário Nascimento; Silva, José Roberto Machado Cunha da; Yamada, Áureo Tatsumi; Hernandez-Blazquez, Francisco Javier; Aloia, Thiago Pinheiro Arrais.
  • Moraes, Simone Maria Teixeira de Sabóia; Federal University of Goias. Department of Morphology. Biologic Sciences Institute. Goiania. BR
  • Saldiva, Paulo Hilário Nascimento; University of São Paulo. School of Medicine. Department of Pathology. São Paulo. BR
  • Silva, José Roberto Machado Cunha da; University of São Paulo. Institute of Biomedical Sciences. Department of Cell and Developmental Biology. São Paulo. BR
  • Yamada, Áureo Tatsumi; State University of Campinas. Institute of Biology. Department of Histology and Embryology. Campinas. BR
  • Hernandez-Blazquez, Francisco Javier; University of São Paulo. School of Veterinary Medicine. Department of Surgery. São Paulo. BR
  • Aloia, Thiago Pinheiro Arrais; Federal University of Goias. Biologic Sciences Institute. Department of Morphology. Goiania. BR
Braz. j. vet. res. anim. sci ; 48(1): 5-13, 2011. tab
Article in English | LILACS | ID: lil-591488
ABSTRACT
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.
RESUMO
O peixe eurihalino sul-americano Poecilia vivipara (BLOCH; SNEIDER, 1801), o guppy, é encontrado tanto em estuários quanto em águas de rios, o que sugere uma alta adaptabilidade aos diferentes ambientes de salinidade. Neste trabalho, estudamos a adaptação do epitélio interlamelar, do arco e do rastelo das brânquias dos peixes de estuário de água doce. Os resultados revelam que o epitélio branquial de Poecilia vivipara pode ajustar-se à água doce, diminuindo a proporção volumétrica (PV) de células mucosas do epitélio interlamelar e aumentando a PV de células clorídricas. No entanto, não houve nenhuma evidência de alteração morfológica semelhante na região do rastelo branquial. O epitélio do rastelo branquial parece ser parte de um compartimento diferente que é menos sensível a variações de salinidade.
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Full text: Available Index: LILACS (Americas) Main subject: Poecilia Limits: Animals Language: English Journal: Braz. j. vet. res. anim. sci Journal subject: Veterinary Medicine Year: 2011 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Goias/BR / State University of Campinas/BR / University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Poecilia Limits: Animals Language: English Journal: Braz. j. vet. res. anim. sci Journal subject: Veterinary Medicine Year: 2011 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Goias/BR / State University of Campinas/BR / University of São Paulo/BR