Selection and crossbreeding in Mediterranean cultured marine fish

Wayne R Knibb; G Gorshkova; S Gorshkov

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Selection and crossbreeding in Mediterranean cultured marine fish

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Selection and crossbreeding in Mediterranean cultured marine fish

Wayne R Knibb, G Gorshkova and S Gorshkov

Genetics and breeding of Mediterranean aquaculture species : proceedings of the seminar of the CIHEAM Network on Technology of Aquaculture in the Mediterranean, Vol.34, pp.47-60

Genetics and breeding of Mediterranean aquaculture species : seminar of the CIHEAM Network on Technology of Aquaculture in the Mediterranean (TECAM), 1997 (Spain, 1997)

CIHEAM, Institut Agronomique Mediterraneen de Zaragoza

1998

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Abstract

Fisheries Sciences

Aquaculture

marine fish farmers

crossbreeding

As profit margins decline, and gains from husbandry improvement diminish, marine fish farmers around the Mediterranean are considering the development and use of genetically improved fish strains to increase productivity and profitability. To date, published data on the use of crossbreeding (intraspecific hybridization) and selection in marine Mediterranean cultured species are available only for the gilthead seabream (Sparus aurata). Crossbreeding: to date, crosses between S. aurata strains usually yielded little heterosis. Between strain selection: differences for growth and survival performance in culture were detected among several Eastern Mediterranean strains of gilthead sea bream S. aurata. Within strain selection: mass selection rather than family selection, was technically possible for the group spawning S. aurata. Single generation up-selection for weight increase yielded -0.4% to 10.9% gain (average gain of 7.3%), and down-selection for weight decrease yielded 8.5% to 16.2% loss at harvest weight. Gain from selection for increase weight was attributed to increased food conversioenf ficiency.

Details

Title: Selection and crossbreeding in Mediterranean cultured marine fish
Authors: Wayne R Knibb (Author) - Israel Oceanographic and Limnological Research
G Gorshkova (Author) - Israel Oceanographic and Limnological Research
S Gorshkov (Author) - Israel Oceanographic and Limnological Research
Publication details: Genetics and breeding of Mediterranean aquaculture species : proceedings of the seminar of the CIHEAM Network on Technology of Aquaculture in the Mediterranean, Vol.34, pp.47-60
Conference details: Genetics and breeding of Mediterranean aquaculture species : seminar of the CIHEAM Network on Technology of Aquaculture in the Mediterranean (TECAM), 1997 (Spain, 1997)
Publisher: CIHEAM, Institut Agronomique Mediterraneen de Zaragoza
Date published: 1998
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99449884102621
Output Type: Conference paper

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