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Endogenous excretion of Siberian sturgeon, Acipenser baeri Brandt

Published online by Cambridge University Press:  15 October 1991

Dominique Salin  and
Patrick Williot
Dominique Salin
Affiliation:
CEMAGREF, Division Aquaculture et Pêche, 50, avenue de Verdun, BP 3, 33610 Gazinel, France
Patrick Williot
Affiliation:
CEMAGREF, Division Aquaculture et Pêche, 50, avenue de Verdun, BP 3, 33610 Gazinel, France
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Abstract

The pattern of ammonia excretion was examined in the Siberian sturgeon, Acipenser baeri, during starvation. For different weight groups (60 g to 2 kg), this excretion decreased rapidly to reach a constant level of 32 mg NH4-N.kg-1.day-1 after 8 days of fast. This minimum is an estimation of the Endogenous Nitrogen Excretion (ENE). No diurnal pattern was observed in the ammonia excretion or oxygen consumption (28.6 ± 3.2 mg O2.kg-1.h-1, mean ± sd) of fasted fish. These data appear to indicate that the basal metabolism is very low in the Siberian sturgeon and that the nycthemeral cycle is only the result of exogenous nutrition.

Keywords

ExcretionammoniaoxygensturgeonAcipenser baeriExcrétionammoniaqueoxygèneesturgeonAcipenser baeri
Type
Research Article
Information
Aquatic Living Resources , Volume 4 , Issue 4 , October 1991 , pp. 249 - 253
Copyright
© IFREMER-Gauthier-Villars, 1991

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