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North American Journal of Aquaculture Volume 65, 2003 - Issue 1
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Technical Notes

The Effect of Using Two-Year-Old Male Coho Salmon in Hatchery Broodstock on Adult Returns

Andrew E. Appleby Washington Department of Fish and Wildlife, 600 Capitol Way North, Olympia, Washington, 98501-1091, USA
,
Jack M. Tipping Washington Department of Fish and Wildlife, 600 Capitol Way North, Olympia, Washington, 98501-1091, USA
&
Paul R. Seidel Washington Department of Fish and Wildlife, 600 Capitol Way North, Olympia, Washington, 98501-1091, USA
Pages 60-62 | Received 30 Nov 2001, Accepted 26 Jun 2002, Published online: 09 Jan 2011
 
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Abstract

We conducted an experiment comparing the age at maturity of hatchery coho salmon Oncorhynchus kisutch sired with 2% or 100% age-2 jacks and released at two smolt sizes. Progeny sired by 100% age-2 males returned significantly more age-2 jacks than did those sired with 2% age-2 males. However, the survival and mean length of age-3 fish was similar for the two groups. Significantly more age-2 returns were produced by releasing larger (34–40 g) smolts rather than smaller (23–28 g) ones, but smolt size did not affect the survival or mean length of age-3 returns.

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