New Zealand Journal of Marine and Freshwater Research abstracts
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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