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Understanding larval culture requirements of Southern Bluefin Tuna

Citation

Cobcroft, JM and Battaglene, SC and Chen, B and Deichmann, M and Fielder, S and Hutchinson, W and Knuckey, R and Qin, J and Schipp, G and Thomson, M, Understanding larval culture requirements of Southern Bluefin Tuna, Australasia Aquaculture, 1-4 May 2012, Melbourne, pp. on CD. (2012) [Conference Extract]


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Abstract

The primary goal of Clean Sea Tuna Ltd (CST) and the recent Seafood CRC-supported collaborative research projects, is to achieve the closed life-cycle production of Southern Bluefin Tuna (SBT)(Thunnus maccoyii), in order to underpin a sustainable aquaculture industry. There are several known bottlenecks in the hatchery production of bluefin tuna species, initially identified through pioneering research in Japan, largely through Kinki University. These mortality events include: surface mortality in newly hatched larvae, sinking and death on the tank bottom in the live feed stage, cannibalism, weaning, and wall collisions. This research has aimed to address early larval mortality bottlenecks through the live feed stage in tank-based larval rearing. In the 2011 spawning season,fertilised SBT eggs were successfully transferred to Darwin (DAC), Port Stephens (PSFI) and two CST hatcheries in Arno Bay. Investigations of light intensity and live feed type at first feeding resulted in an increase in the incidence of swimbladder inflation in SBT larvae compared to the two previous years’ trials. Urinary calculi, which can be indicative of inappropriate culture conditions, were present at a high incidence in SBT larvae reared in some conditions and were not present in other conditions.

Item Details

Item Type:Conference Extract
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Aquaculture Tuna
Author:Cobcroft, JM (Dr Jennifer Cobcroft)
Author:Battaglene, SC (Associate Professor Stephen Battaglene)
ID Code:77623
Year Published:2012
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2012-05-14
Last Modified:2012-05-28
Downloads:12 View Download Statistics

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