New Zealand Journal of Marine and Freshwater Research abstracts

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Short communication 

Jaw malformation in cultured yellowtail kingfish (Seriola lalandi) larvae

Jennifer M. Cobcroft

Marine Research Laboratories
Tasmanian Aquaculture and Fisheries Institute
University of Tasmania
Private Bag 49, Hobart
Tas 7001, Australia
email: jenny.cobcroft@utas.edu.au

Patricia M. Pankhurst

School of Aquaculture
Tasmanian Aquaculture and Fisheries Institute
University of Tasmania
Locked Bag 1370, Launceston
Tas 7250, Australia

Carolyn Poortenaar

National Institute of Water and Atmospheric
 Research Limited
P.O. Box 109 695
Auckland, New Zealand

Bob Hickman
Mike Tait

National Institute of Water and Atmospheric
 Research Limited
P.O. Box 14 901
Wellington, New Zealand

Abstract  Several jaw malformations are common in cultured finfish larvae. Hatchery-reared yellowtail kingfish (Seriola lalandi) larvae were cleared and stained to examine cartilage and bone structure of the jaw. One malformation, characterised by a lowered hyoid arch, was present in kingfish larvae on days 4 and 8 post-hatching, but not on day 12. A different malformation was present in larvae on day 16, typified by abnormal positioning of the lower jaw and hyoid arch, and breakage of the Meckel’s cartilage. Evidence of jaw malformations as early as day 4 suggests that broodstock nutrition may be a factor in the jaw malformation of kingfish larvae, but other potential causes are environmental factors in culture and larval nutrition.

Keywords  Seriola lalandi; jaw malformation; marine fish larvae; larval rearing

M03026; Online publication date 15 March 2004; Received 23 May 2003; accepted 15 October 2003
New Zealand Journal of Marine and Freshwater Research, 2004, Vol. 38: 67-71
0028-8330/04/3801-0067 © The Royal Society of New Zealand 2004

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