Evidence of Local Adaptation in Westslope Cutthroat Trout

被引:21
作者
Drinan, Daniel P. [1 ]
Zale, Alexander V. [2 ]
Webb, Molly A. H. [3 ]
Shepard, Bradley B. [1 ]
Kalinowski, Steven T.
机构
[1] Montana State Univ, Dept Ecol, Montana Cooperat Fishery Res Unit, Bozeman, MT 59717 USA
[2] US Geol Survey, Montana Cooperat Fishery Res Unit, Bozeman, MT 59717 USA
[3] US Fish & Wildlife Serv, Bozeman Fish Technol Ctr, Bozeman, MT 59715 USA
基金
美国国家科学基金会;
关键词
ATLANTIC SALMON; CLIMATE-CHANGE; RAINBOW-TROUT; POPULATIONS; TEMPERATURE; EXTINCTION; WILD; RECOVERY;
D O I
10.1080/00028487.2012.675907
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
An understanding of the process of local adaptation would allow managers to better protect and conserve species. Many salmonids are in need of such efforts, and because they often persist in differing, isolated environments, they are useful organisms for studying local adaptation. In addition, the temperature sensitivity of salmonids provides a likely target for natural selection. We studied thermal adaptation in four wild populations and one hatchery stock of westslope cutthroat trout Oncorhynchus clarkii lewisi. The mean summer temperatures of source streams ranged from 6.7 degrees C to 11.2 degrees C. Embryos were collected from the wild, and embryonic development, embryonic survival, and juvenile growth were determined. A significant relationship between median embryonic survival and source stream temperature was detected. Based on a rank test, populations from colder streams had a greater decline in median embryonic survival at warm temperatures than populations from warmer streams. Embryonic development and juvenile growth did not appear to be influenced by source. These findings suggest that populations are thermally adapted to their source streams and this should be considered by managers. However, further study is necessary to sort out the potential confounding factors, whether genetic or epigenetic.
引用
收藏
页码:872 / 880
页数:9
相关论文
共 44 条
[1]  
ALLENDORF F W, 1988, Conservation Biology, V2, P170, DOI 10.1111/j.1523-1739.1988.tb00168.x
[2]  
[Anonymous], 2010, R LANG ENV STAT COMP
[3]   Comparative thermal requirements of westslope cutthroat trout and rainbow 11-out: Implications for species interactions and development of thermal protection standards [J].
Bear, Elizabeth A. ;
Mcmahon, Thomas E. ;
Zale, Alexander V. .
TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY, 2007, 136 (04) :1113-1121
[4]  
Behnke R.J., 1992, American Fisheries Society Monograph, V6, pi
[5]   PERSISTENCE OF DIFFERENT-SIZED POPULATIONS - AN EMPIRICAL-ASSESSMENT OF RAPID EXTINCTIONS IN BIGHORN SHEEP [J].
BERGER, J .
CONSERVATION BIOLOGY, 1990, 4 (01) :91-98
[6]  
Brett J.R., 1970, MARINE ECOLOGY, V1, P515
[7]  
Bromage N. R., 1988, RECENT ADV AQUACULTU, P63
[8]  
Cooney SJ, 2005, WEST N AM NATURALIST, V65, P371
[9]  
Darwin C., 1892, Effects of Cross and Self Fertilization in the Vegetable Kingdom
[10]  
EMBODY G. G., 1934, TRANS AMER FISH SOC, V64, P281, DOI 10.1577/1548-8659(1934)64[281:ROTTTI]2.0.CO