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The ontogeny of physiological response to temperature in early stage spiny lobster (Jasus edwardsii) larvae

Citation

Bermudes, M and Ritar, AJ, The ontogeny of physiological response to temperature in early stage spiny lobster (Jasus edwardsii) larvae, Comparative Biochemistry and Physiology Part A Molecular and Integrative Physiology, 138, (2) pp. 161-168. ISSN 1095-6433 (2004) [Refereed Article]

DOI: doi:10.1016/j.cbpb.2004.03.010

Abstract

The physiological response to temperature, in terms of oxygen consumption, nitrogen excretion and feed intake was examined in Jasus edwardsii larvae at mid-stages I-III. From stage I to stage III, the mass-specific oxygen consumption increased in a sigmoid pattern over the temperature range of 10-22°C. The Q 10 value declined significantly from 14-18 to 18-22°C range, indicating a reduced temperature dependence of larval metabolism at higher temperatures. At all stages, feed intake increased with increasing temperature but reached a plateau at the higher temperatures for stages I and II larvae. In contrast, nitrogen excretion increased linearly over this temperature range for all larval stages. Therefore, higher temperatures (∼22°C) may cause an energetic imbalance and reduce growth potential in early stage larvae. While the convection requirement index (quotient of feed intake and oxygen consumption) indicated an equivalent metabolic feeding efficiency from 14 to 22°C, a consistent decline of the O/N ratio above 16-18°C from stage I to stage III suggested that exposure to elevated temperatures may result in an increase in the amount of protein being diverted from growth to catabolic processes. Based on these results, a temperature of 18°C is recommended for the culture of early stage J. edwardsii larvae. © 2004 Elsevier Inc. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
Author:Ritar, AJ (Associate Professor Arthur Ritar)
ID Code:30797
Year Published:2004
Web of Science® Times Cited:13
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2004-08-01
Last Modified:2007-08-14
Downloads:0

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