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Allozyme heterozygosity and development in Atlantic salmon, Salmo salar

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Abstract

The development of Atlantic salmon (Salmo salar) parr was monitored during the first year in a fresh-water hatchery environment to test whether multilocus heterozygosity (computed for six allozyme loci: s AAT-4*, IDDH-1*, IDDH-2*, IDPH-3*, s MDH-3,4* andm MEP-2*) is associated with growth (body mass, fork length) and maturity status (mature male parr). The length frequency distribution of population was unimodal in September, but was clearly bimodal by December. UMG fish tended to be more heterozygous and had higher growth rates than LMG fish. The heterozygosity of UMG fish and mature male parr (MMP) did not differ significantly but MMP showed lower growth rates than UMG. There were positive correlations between the number of heterozygotic loci and the fork length, weight or growth rates of individuals.

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Blanco, G., Presa, P., Vázquez, E. et al. Allozyme heterozygosity and development in Atlantic salmon, Salmo salar. Fish Physiology and Biochemistry 19, 163–169 (1998). https://doi.org/10.1023/A:1007771417270

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