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Feeding has the largest effect on the ammonia excretion rate of the southern rock lobster, Jasus edwardsii, and the western rock lobster, Panulirus cygnus

Citation

Crear, BJ and Forteath, GNR, Feeding has the largest effect on the ammonia excretion rate of the southern rock lobster, Jasus edwardsii, and the western rock lobster, Panulirus cygnus, Aquacultural Engineering, 26, (4) pp. 239-250. ISSN 0144-8609 (2002) [Refereed Article]

DOI: doi:10.1016/S0144-8609(02)00033-X

Abstract

The total ammonia nitrogen (TAN) excretion of spiny lobsters Jasus edwardsii and Panulirus cygnus, was determined in relation to temperature, body weight, emersion, daily rhythm and feeding. Temperature and body weight had large influences on the rate of TAN excretion. Exponential relationships were found between temperature (T) and TAN excretion of both species. These were described by the following equations: J. edwardsii Log10 TAN = 0.041 T-3.57 (r2 = 0.979, F = 143.2, P = 0.001), P. cygnus Log10 TAN = 0.057T-3.90 (r2 = 0.987, F = 302.2, P < 0.001). TAN excretions of both species were positively correlated to body weight (W), and the relationships were described by the following equations: J. edwardsii Log10 TAN = 0.473 log10 W-1.704 (r2 = 0.42, F = 14.05, P = 0.001), P, cygnus Log10 TAN = 0.499 log10 W-1.346 (r2 = 0.69, F = 44.18, P < 0.001), TAN excretion increased significantly when lobsters were re-immersed after a 30 min period of emersion. However, it returned to pre-emersion levels by the second hour of re-immersion. Daily rhythm resulted in a significantly higher nocturnal TAN excretion rate for J. edwardsii; no daily rhythm was observed for P. cygnus, Feeding had the largest influence on TAN excretion, with maximum increases of 6.28 (J. edwardsii) and 5.60 (P. cygnus) times the pre-feeding level. TAN excretion rates remained significantly higher than the pre-feeding levels for an extended period (26 h, J. edwardsii; 30 h, P. cygnus). Implications for the use of purging tanks in lobster holding facilities and for the design of biofiltration systems are discussed. © 2002 Elsevier Science B.V. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fish Physiology and Genetics
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Fisheries - Wild Caught not elsewhere classified
Author:Crear, BJ (Mr Bradley Crear)
Author:Forteath, GNR (Professor Nigel Forteath)
ID Code:25006
Year Published:2002
Web of Science® Times Cited:18
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2002-08-01
Last Modified:2003-05-22
Downloads:0

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