Journal
FRONTIERS IN ECOLOGY AND THE ENVIRONMENT
Volume 20, Issue 4, Pages 217-221Publisher
WILEY
DOI: 10.1002/fee.2457
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Funding
- Research Council of Norway [287438]
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This study used long-term mass-marking program data from Japan to evaluate the effects of wild genes on the survival of captive-bred populations. The results showed that increasing the percentage of wild genes can improve the survival rate of captive-bred offspring in the wild.
Captive-breeding programs are actively engaged in conservation and resource enhancement for a variety of species around the world, yet captive-bred individuals often experience reduced fitness in the wild due to inbreeding and adaptation to captivity. Increasing wild-type genetic contributions has been proposed as one solution to this problem, but the demographic impacts of these contributions remain unclear. Using data from long-term mass-marking programs conducted by national hatcheries in Japan, we evaluated the effects of wild genes in the parental generation on the survival of captive-bred populations. Our results indicated that increasing the percentage of wild genes improves survival of captive-bred offspring in the wild in two salmonid species. These findings offer insights for future bioresource management efforts that use both wild and captive-bred individuals.
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