Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 4566
Title: Hitting the Right Target: Rearing Innovations for Conservation Aquaculture
Author: T. N. Pearsons, Joshua G. Murauskas, Donald A. Larsen, Brian R. Beckman, Andrew H. Dittman
Publication Year: 2013
Journal: Hatchery International
Keywords: hatcheries,salmon,life history,imprinting
Abstract:

No abstract -this is the introductory paragraph

 Reform of salmon and steelhead hatcheries on the West Coast of North America has focused on achieving metrics that occur outside of the hatchery environment. For example, conservation aquaculture programs typically attempt to match the adult characteristics of natural-origin fish, reduce straying, and reduce undesirable ecological interactions.  However, despite a change in the target of conservation aquaculture programs, hatchery rearing practices have not evolved to help achieve these targets. For example, the stated and unstated target of many programs is to produce a given number of big healthy smolts of similar size that presumably migrate and survive well.  This target may not produce the results that are desired for conservation oriented hatchery programs.   Accelerated growth regimes under this approach may result in elevated levels of precocious maturation (e.g., mini-jacks and jacks), reduced age at maturity, increased stray rates, high nutrient discharges, and undesirable ecological interactions with other taxa.  Some of these unintended consequences can be reduced by utilizing an outcome-based rearing strategy focused on conservation.  We present six approaches to align hatchery rearing practices with reformed targets and suggest methods to meet these targets.

Description:

 Article on improved hathcery practices

Theme: Recovery, Rebuilding and Sustainability of Marine and Anadromous Species
Foci: Maximize effectiveness and minimize impacts of artificial propagation in recovery, rebuilding and stock sustainability
Describe the relationship among human activities and species stock status, recovery, rebuilding and sustainability.