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


Bermudes, MFM and Ritar, AJ and Carter, CG, The ontogeny of physiological response to light intensity in early stage spiny lobster (Jasus edwardsii) larvae, Comparative Biochemistry and Physiology, Part A, 150, (1) pp. 40-45. ISSN 1095-6433 (2008) [Refereed Article]

DOI: doi:10.1016/j.cbpa.2008.02.023


Early stage phyllosoma larvae of the spiny rock lobster Jasus edwardsii were examined for swimming speed, feeding, oxygen consumption and nitrogen excretion as instantaneous performance indicators when exposed to different irradiance levels. Swimming speed was measured in recently hatched Stage I larvae while all other parameters were measured in larvae from hatch to mid-Stage V. The swimming speed of recently hatched Stage I phyllosoma increased logarithmically between light intensities of 2.9 × 1014 and 1.8 × 1016 quanta s- 1 cm- 2 indicating that, within this range, swimming activity was only suppressed at the lowest irradiance level. Larvae examined under dark (no light) conditions showed lower feed intake, oxygen consumption and nitrogen excretion than larvae under low (7.7 × 1012 q s- 1 cm- 2) and high (3.9 × 1014 q s- 1 cm- 2) light intensities, and this was a consistent pattern observed throughout development from hatch to Stage V. There was no difference in feeding, oxygen consumption and nitrogen excretion between larvae exposed to low and high light intensities. However, from mid-Stage I to mid-Stage V, the metabolic feeding efficiency (feed intake:oxygen consumption ratio) was consistently higher in larvae exposed to low light intensity than in phyllosoma assessed in the dark and under high irradiance. A light intensity of about 7.7 × 1012 quanta s- 1 cm- 2 and no higher than 3.9 × 1014 quanta s- 1 cm- 2 is recommended to stimulate feeding and optimise metabolic feeding efficiency in early larval stages of J. edwardsii. © 2008 Elsevier Inc. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food 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
UTAS Author:Bermudes, MFM (Dr Michel Bermudes)
UTAS Author:Ritar, AJ (Associate Professor Arthur Ritar)
UTAS Author:Carter, CG (Professor Chris Carter)
ID Code:52141
Year Published:2008
Web of Science® Times Cited:18
Deposited By:NC Marine Conservation and Resource Sustainability
Deposited On:2008-06-03
Last Modified:2009-03-23

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