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Author
Araki, HitoshiPublication Editor
Romana-Eguia, Maria Rowena R.Parado-Estepa, Fe D.
Salayo, Nerissa D.
Lebata-Ramos, Ma. Junemie Hazel
Date
2015
Metadata
Show full item recordAbstract
Accumulating evidence suggests rapid adaptation of fish populations when they are exposed to artificial hatchery environments. However, little is known if rapidly-adapted populations can readapt to their original, natural environment at the same rate. Here, I review recent studies on salmonid fish that address this issue. They indeed suggest rapid adaptation of hatchery populations, in which reproductive fitness under a natural environment became much lower than that in the wild population after only 1-2 generations of captive breeding. However, the reproductive fitness did not recover after one generation of natural rearing, implying that rapid adaptation to a new environment was not reversible at the same rate. I discuss potential consequences of the irreversible fitness reduction in extensively stocked fish species. Understanding the mechanism behind the irreversible rapid adaptation in fish populations will help us figure out a better, nature-friendly, and hence sustainable means of hatchery operations for human welfare.Page Range
pp.19-24Title of Parent Book or Report
Resource enhancement and sustainable aquaculture practices in Southeast Asia: challenges in responsible production of aquatic species: proceedings of the International Workshop on Resource Enhancement and Sustainable Aquaculture Practices in Southeast Asia 2014 (RESA).Publisher or University
Aquaculture Dept., Southeast Asian Fisheries Development CenterResource/Dataset Location
http://hdl.handle.net/10862/2760