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Addressing causes of early mortality in hatchery produced southern bluefin tuna larvae. Chapter 9: the effects of in-tank lighting on the early behaviour and performance of yellowtail kingfish larvae

Citation

Cobcroft, JM, Addressing causes of early mortality in hatchery produced southern bluefin tuna larvae. Chapter 9: the effects of in-tank lighting on the early behaviour and performance of yellowtail kingfish larvae, Australian Seafood Cooperative Research Centre, 2011/740 (2014) [Contract Report]


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Abstract

High levels of variability in the survival, growth and malformation rates of YTK larvae (produced by different hatcheries, or even between different hatchery runs at the same hatchery), have been problematic in trying to better understand the causes of the bottleneck issues in YTK larval rearing. Some of the key parameters that have differed between hatchery sites or runs with variable rearing outcomes include the level of tank illumination, tank wall colour and pattern and especially the amount of reflected light coming off the walls. One potential way to address this is to use in-tank lighting. One experiment was carried out to see if an in-tank LED light could reduce walling behaviour in early stage YTK reared in standard glossy green tanks. The indications were that the in-tank light setup used in this study did not perform as well as the Granite tanks for YTK larvae up to 4 dph.

Item Details

Item Type:Contract Report
Keywords:yellowtail kingfish, larval rearing, vision, early feeding, light
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 Fin Fish (excl. Tuna)
Author:Cobcroft, JM (Dr Jennifer Cobcroft)
ID Code:96232
Year Published:2014
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2014-10-27
Last Modified:2015-04-09
Downloads:0

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