Genetic Effects of Straying of Non-Native Hatchery Fish into Natural Populations Proceedings of the Workshop June 1-2,1995 Seattle, Washington

The last decade has seen an increasing awareness of the importance of considering genetic issues in the management of Pacific salmon (Oncorhynchus spp.) (Simon et al. 1986, Allendorf and Ryman 1987, Withler 1988, Waples et al. 1990, Riddell 1993, Park et al. 1994, Currens and Busack 1995, NRC 1996). At the same time, it has become clear that available scientific information is often insufficient to allow reliable predictions of the genetic consequences of different management actions, particularly those involving artificial propagation. One issue with both scientific and management implications is straying. Straying among, as well as homing to, natal populations is part of the evolutionary ecology of Pacific salmon. However, human manipulation of salmon and their ecosystems can also affect the nature and magnitude of straying. In particular, artificial propagation can result in higher rates of straying than would occur naturally and may also cause salmon to stray into areas that they would not normally reach. 1997 NMFS (National Marine Fisheries Service) NWFSC (Northwest Fisheries Science Center) Library Public Domain 1861