Selection equilibrium for hatchery and wild spawning fitness in integrated breeding programs

被引:37
作者
Goodman, D [1 ]
机构
[1] Montana State Univ, Dept Ecol, Environm Stat Grp, Bozeman, MT 59717 USA
关键词
D O I
10.1139/F04-187
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Some salmon hatchery programs intentionally integrate the wild and hatchery population by taking naturally spawned fish as some fraction of the broodstock and allowing hatchery progeny to constitute some fraction of the adults spawning in the wild. This circumvents some ecological concerns about the effects of hatchery fish on the "wild" population while still reaping some of the benefits of increased potential for harvest, but it increases some genetic concerns. Here, we model phenotypic evolution in the integrated population to investigate the effects on natural spawning fitness at the joint selection and demographic equilibrium. We find a potential, but not a certainty, depending on quantitative aspects of the management interacting with biological characteristics of the stock, for substantial erosion of natural spawning fitness, compared with the original wild population, including the possibility of runaway selection driving natural spawning fitness effectively to zero. The vulnerability to such evolutionary deterioration increases with the magnitude of the contribution of hatchery breeding to the total production and increases with harvest. The response of the selection equilibrium to increasing contribution of hatchery progeny to the broodstock can exhibit a catastrophic discontinuity.
引用
收藏
页码:374 / 389
页数:16
相关论文
共 76 条
[1]   Population differentiation in Pacific salmon: Local adaptation, genetic drift, or the environment? [J].
Adkison, MD .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1995, 52 (12) :2762-2777
[2]  
Arnold Stevan J., 1995, P295
[3]  
Ballou JD, 1995, POPULATION MANAGEMEN
[4]  
BILBY RE, 2003, REV SALMON STEELHEAD
[5]  
Bisson PA, 2002, FISHERIES, V27, P16, DOI 10.1577/1548-8446(2002)027&lt
[6]  
0016:HSITPN&gt
[7]  
2.0.CO
[8]  
2
[9]  
Bugert RM, 1998, FISHERIES, V23, P11, DOI 10.1577/1548-8446(1998)023<0014:MOSITC>2.0.CO
[10]  
2