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Some effects of temperature and starvation on the bivalve @iDonax vittatus@@ (da Costa) in experimental laboratory populations

DRS at CSIR-National Institute of Oceanography

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Title Some effects of temperature and starvation on the bivalve @iDonax vittatus@@ (da Costa) in experimental laboratory populations
 
Creator Ansell, A.D.
Sivadas, P.
 
Subject Molluscs
Aquatic Ecology, Productivity
marine molluscs
temperature effects
starvation
body weight
experimental research
controlled conditions
Donax vittatus
ISW, India
 
Description The effect of temperature on the body weight and composition, and on respiration, filtration and NH, excretion of the bivalve Donax uittatus (da Costa) has been investigated in laboratory-maintained populations under conditions of starvation In all experiments there was a steady mortality, which showed little temperature dependence The experimental animals lost weight at all temperatures, and carbohydrate, lipid and protein a11 contributed to this loss The rate of loss of all components was greater at higher temperatures There was a good agreement between the caloric loss calculated as the sum of carbohydrate and lipid loss from the body plus the protein equivalent of the ammonia excreted, and the calculated respiratory requirement in calories, but loss of protein as amino-acids also made a significant contribution to the total energy loss During progressive starvation protein played an increasingly important role as a respiratory substrate Most of the rate functions measured showed significant effects of both experimental and acclimation temperature The rate functions responded in different ways to temperature For oxygen consumption and filtration rate these responses corresponded to those shown in relation to different acclimation temperatures experienced in nature NH, excretion was more affected by starvation, and the increase in importance of protein as a respiratory substrate Donax virtatus shows no evidence of complete acclimation to different temperatures; the metabolic rate is higher at higher temperatures and the increased rate is maintained even during periods of starvation by rapid utilization of reserves Such a response to environmental changes involves both the ability to exploit short-term favourable conditions, and vulnerability to unfavourable conditions; both of which are reflected in the ecology of this and other species of Donax.
 
Date 2005-02-01T09:56:40Z
2017-09-29T13:47:16Z
2005-02-01T09:56:40Z
2017-09-29T13:47:16Z
1973
 
Type Journal Article
 
Identifier Journal of Experimental Marine Biology and Ecology, vol.13(3); 1973; 229-262
0022-0981
http://drs.nio.org/drs/handle/2264/5786
 
Language en
 
Relation J Exp Mar Biol Ecol
SCI
 
Publisher Elsevier