Effect of salinity on oxygen consumption and ammonium excretion in Macrobrachium rosenbergii (Crustacea: Palaemonidae)

The metabolic rate of postlarvae and juvenile of Macrobrachium rosenbergii increased at low salinities because they required more energy to compensate for the accentuated osmotic gradient. Respiratory rates was constant at high salinities: less energy was used to hyperosomoconform. When salinity inc...

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Bibliographic Details
Published inRevista de biología tropical Vol. 41; no. 2; pp. 239 - 243
Main Authors Diaz Herrera, F, Buckle Ramirez, LF
Format Journal Article
LanguageSpanish
Published 01.08.1993
Subjects
Macrobrachium rosenbergii
Marine
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Summary:The metabolic rate of postlarvae and juvenile of Macrobrachium rosenbergii increased at low salinities because they required more energy to compensate for the accentuated osmotic gradient. Respiratory rates was constant at high salinities: less energy was used to hyperosomoconform. When salinity increased ammonia excretion increment of both stages were related to the activity of the ionic Na super(+)/NH super(+) sub(4) exchange bomb to balance the Na super(+) levels of hemolymph. The atomic relation O:N showed that the postlarvae and juvenile prawns used carbohydrate lipid at diluted mediums and protein at high salinities.
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ISSN:0034-7744