Journal
AQUACULTURE
Volume 295, Issue 1-2, Pages 22-29Publisher
ELSEVIER
DOI: 10.1016/j.aquaculture.2009.06.029
Keywords
Aquaculture; Broadcast-spawning; Ex situ conservation; Haliotis kamtschatkana; Population supplementation; Sweepstakes hypothesis
Categories
Funding
- AquaNet
Ask authors/readers for more resources
The northern (or pinto) abalone, Haliotis kamtschatkana, is a broadcast-spawning marine gastropod that was recently listed as endangered in Canada. To aid in species recovery, a captive-breeding and supplementation program is underway in Barkley Sound, British Columbia. We genotyped first generation progeny for five microsatellite loci and used a pedigree reconstruction program (PEDIGREE 2.2) to identify their genealogical relationships in the absence of information on parental genotypes. We analyzed progeny from three separate group-spawning events and inferred considerable variation in the number of offspring produced by each parent; in the most severe case a single male sired all the progeny produced during one spawning event. After only one generation of captive-breeding we found a 55-60% reduction in allelic richness and a 17-18% reduction in heterozygosity relative to the diverse wild source population. This study illustrates the difficulty of managing genetic diversity in hatchery populations of a broadcast-spawning species, even when gametes are collected separately from each individual broodstock. (C) 2009 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available