New Zealand Journal of Marine and Freshwater Research abstracts

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Effect of brine shrimp size on the consumption rate, growth, and survival of early stage phyllosoma larvae of the rock lobster Jasus edwardsii

LENNARD J. TONG
GRAEME A. MOSS
MEGAN P. PAEWAI

National Institute for Water & Atmospheric
 Research Ltd
P. O. Box 14 901, Kilbirnie
Wellington, New Zealand
email: g.moss@niwa.cri.nz

Abstract  Stages I, III, and V phyllosoma larvae of the rock lobster Jasus edwardsii (Hutton) were fed daily with 40, 80, 160, or 320, 1-mm brine shrimps (Artemia salina) while controls were fed either 4, 8, or 16, 2-3-mm brine shrimps. Stage I larvae fed 1-mm brine shrimps moulted in the same time as the controls. Stage III and V larvae fed 160, 1-mm brine shrimps or less took significantly longer to moult than the controls but those fed 320, 1-mm brine shrimps were not significantly different. There was no difference in the survival rates, which ranged between 70 and 100% for all stages. The consumption rate increased significantly as the initial density of 1-mm brine shrimps increased.

Keywords  Jasus edwardsii; phyllosoma larvae; Artemia salina; food size; intermoult period; post-moult size; survival

M0005
Received 26 January 2000; accepted 11 April 2000

PDF file of entire paper: medium quality (415K); (scanned from paper original: notes about this process)

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