Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 8686
Title: Effects of rearing temperature on growth and survival of larval sablefish (Anoplopoma fimbria)
Author: M. A. Cook, J. S.F. Lee, K. C. Massee, Thomas H. Wade, F. W. Goetz
Publication Year: 2017
Volume: 479
Pages: 91-99
Keywords: fast growth,early weaning,cannibalism,larvaculture
Abstract:

The effects of three different rearing temperatures (12, 15, and 18°C) on growth and survival of sablefish larvae (Anoplopoma fimbria) were examined from five days post-stocking to weaned sub-juveniles. First-feeding larvae were stocked into 960 L circular tanks at a density of 15 larvae L-1 (n=3 per temperature treatment). Feeding, increases in light and water flow, and other changes during the experiment were based on a degree-day (°Cday) schedule to adjust for time and temperature. The larvae were weaned on calendar day 41, 34, and 30 in the 12, 15, and 18°C treatments, respectively. Survival to weaning was greater at 15 than 12 or 18°C. Calendar day and degree-day length and dry weight were greater in the 18°C treatment. The larvae were weaned seven days earlier at 15°C and eleven days earlier at 18°C compared to larvae at 12°C. Sablefish larvae can be reared at 15°C with faster growth and good survival compared to 12°C and at an approximately 17% reduction in cost and labor. Sablefish grew even faster but had higher mortality rates at 18°C compared to 15°C. Results from genotyping strongly suggest that there is a genetic basis for performing differentially at varying rearing temperatures and would also suggest that selection for faster growth and higher survival could be accomplished in a  broodstock program.

Description:

Manuscript describing the effect of three different temperature on growth and survival.

Theme: Sustainable, safe and secure seafood for healthy populations and vibrant communities
Foci: Develop research and technology to foster innovative and sustainable approaches to aquaculture.