The effects of hatchery domestication on competitive dominance of juvenile spring Chinook salmon (Oncorhynchus tshawytscha)

被引:36
作者
Pearsons, Todd N. [1 ]
Fritts, Anthony L. [1 ]
Scott, Jennifer L. [1 ]
机构
[1] Washington Dept Fish & Wildlife, Olympia, WA 98501 USA
关键词
D O I
10.1139/F07-058
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
We tested the null hypotheses that competitive dominance among juvenile Chinook salmon (Oncorhynchus tshawytscha) in contest and scramble experiments would not be affected by domestication selection after one generation of state-of-the-art hatchery culture. Dyadic challenges of size-matched juvenile fish were conducted after a 6-day acclimation in 113.4 L aquaria. Differences in dominance and frequency of different types of agonistic interactions used were not significantly different in contest (n = 505) or scramble (n = 363) competition experiments (P > 0.05). However, wild origin fish were more aggressive than hatchery origin fish in both types of experiments (P <= 0.05). Furthermore, wild origin fish gained more weight than hatchery origin fish during contest experiments, and hatchery origin fish lost less weight than wild origin fish in scramble experiments (P <= 0.05). Dominant fish, regardless of origin, grew more than subordinate fish in both contest and scramble experiments (P <= 0.05). Our results indicate that aggression, and growth mediated by competition, can be affected by domestication after only one generation of state-of-the-art hatchery culture; however, impacts to competitive dominance appear to be small.
引用
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页码:803 / 812
页数:10
相关论文
共 41 条
[1]  
ABBOTT JC, 1985, BEHAVIOUR, V92, P241
[2]  
[Anonymous], 1981, Statistical Tables
[3]   Reproductive success of captive-bred steelhead trout in the wild: Evaluation of three hatchery programs in the Hood River [J].
Araki, Hitoshi ;
Ardren, William R. ;
Olsen, Erik ;
Cooper, Becky ;
Blouin, Michael S. .
CONSERVATION BIOLOGY, 2007, 21 (01) :181-190
[4]  
BACHMAN RA, 1984, T AM FISH SOC, V113, P1, DOI 10.1577/1548-8659(1984)113&lt
[5]  
1:FBOFWA&gt
[6]  
2.0.CO
[7]  
2
[8]  
Berejikian BA, 1999, T AM FISH SOC, V128, P832, DOI 10.1577/1548-8659(1999)128<0832:CDBNEO>2.0.CO
[9]  
2
[10]   Effects of hatchery and wild ancestry and rearing environments on the development of agonistic behavior in steelhead trout (Oncorhynchus mykiss) fry [J].
Berejikian, BA ;
Mathews, SB ;
Quinn, TP .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1996, 53 (09) :2004-2014