2001
DOI: 10.1590/s1516-89132001000100001
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Abstract: This work aimed to know the tolerance mechanisms through the salinity variation by Na+ K+ - ATPase and Mg++ - ATPase and enzymes encountered in the gills of Poecilia vivipara. In field, the presence of this species was observed in salinities of 0 and 28‰. In laboratory, these fish were maintained in aquarium with mean salinity of 30‰ and positive responses were obtained. Some adult specimens, collected in a lagoon of the Coqueiros Beach, were utilized as matrixes. In the experiments the specimens used were tho… Show more

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Cited by 7 publications
(4 citation statements)
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“…These results agree with similar studies that reported the effect of salinity on Mg +2 -ATPase and Na + /K + -ATPase activities in the gills of Poecilia vivipara. It was concluded that the active transport enzymes adapted to the new conditions by greatly increasing their activity with the salinity differences (Amaral et al, 2001). They concluded that these enzymes have complementary functions with the plasma membrane.…”
Section: Discussionmentioning
confidence: 99%
“…These results agree with similar studies that reported the effect of salinity on Mg +2 -ATPase and Na + /K + -ATPase activities in the gills of Poecilia vivipara. It was concluded that the active transport enzymes adapted to the new conditions by greatly increasing their activity with the salinity differences (Amaral et al, 2001). They concluded that these enzymes have complementary functions with the plasma membrane.…”
Section: Discussionmentioning
confidence: 99%
“…P. vivipara is a freshwater migrant, inhabiting slightly brackish waters in channels and drainage trenches on the margins of wetlands (Keith & Planquette, 2000). This species is not only abundant in Pernambuco, but also in estuaries down to southeastern Brazil (Fischer et al, 2004), living in water in which the salinity ranges from 0 to 28 (reaching as high as 30 under laboratory conditions) (Amaral et al, 2001).…”
Section: Discussionmentioning
confidence: 99%
“…The total ATPase activity was estimated as described by Amaral et al . 72 . The main concept of this method is estimation the amount inorganic phosphate (Pi) resulted from ATP hydrolysis by ATPase.…”
Section: Methodsmentioning
confidence: 99%