Escape-related behaviour of Atlantic cod, Gadus morhua L., in a simulated farm situation

被引:27
作者
Hansen, Linda A. [1 ]
Dale, Trine [1 ,2 ]
Damsgard, Borge [1 ]
Uglem, Ingebrigt [3 ]
Aas, Kare [1 ,4 ]
Bjorn, Pal-Arne [1 ]
机构
[1] Norwegian Inst Fisheries & Aquaculture Res, NO-9291 Tromso, Norway
[2] Norwegian Inst Water Res, Bergen, Norway
[3] Norwegian Inst Nat Res, N-7004 Trondheim, Norway
[4] Barlindhaug Norf, Tromso, Norway
关键词
escape behaviour; feeding; cod; boldness; exploration; genotype;
D O I
10.1111/j.1365-2109.2008.02057.x
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Cultured fish escaping from farms represent an economic loss as well as a potential problem for wild fish populations. This study investigated the escape-related behaviour of farmed Norwegian coastal and northeast Arctic cod (NEAC), Gadus morhua L. Six groups of fish were observed during three replicate trials in a large tank that was split into two equal parts by a net wall. The fish could move freely through an opening in the net during the trials. Three groups were not fed during the trials. The first escape occurred shortly after producing the net opening (11 +/- 10.5 min; mean +/- standard deviation). Norwegian coastal cod were more prone to escape than the NEAC. A starvation period of 9 days increased the number of fish on the escape side of the tank. Net biting and net inspection by the fish were frequently observed, irrespective of whether the fish were fed or not. The same fish were repeatedly found on the escape side of the tank, but the propensity for recurrent escape behaviour was not related to genotype, feeding status or size. The results suggest that other factors, such as individual variation in boldness or exploration behaviour, could affect the willingness to escape.
引用
收藏
页码:26 / 34
页数:9
相关论文
共 26 条
[1]  
AAS K, 2005, REP NORW
[2]   Site fidelity and dispersal patterns of domestic triploid steelhead trout (Oncorhynchus mykiss Walbaum) released to the wild [J].
Bridger, CJ ;
Booth, RK ;
McKinley, RS ;
Scruton, DA .
ICES JOURNAL OF MARINE SCIENCE, 2001, 58 (02) :510-516
[3]   In situ examination of boldness-shyness traits in the tropical poeciliid, Brachyraphis episcopi [J].
Brown, C ;
Jones, F ;
Braithwaite, V .
ANIMAL BEHAVIOUR, 2005, 70 :1003-1009
[4]   Shyness and boldness in pumpkinseed sunfish: individual differences are context-specific [J].
Coleman, K ;
Wilson, DS .
ANIMAL BEHAVIOUR, 1998, 56 :927-936
[5]   Cross-shoal variability in the feeding habits of migrating Atlantic cod (Gadus morhua) [J].
DeBlois, EM ;
Rose, GA .
OECOLOGIA, 1996, 108 (01) :192-196
[6]   Genetic divergence at the synaptophysin (Syp I) locus among Norwegian coastal and north-east Arctic populations of Atlantic cod [J].
Fevolden, SE ;
Pogson, GH .
JOURNAL OF FISH BIOLOGY, 1997, 51 (05) :895-908
[7]   Explaining leptokurtic movement distributions: Intrapopulation variation in boldness and exploration [J].
Fraser, DF ;
Gilliam, JF ;
Daley, MJ ;
Le, AN ;
Skalski, GT .
AMERICAN NATURALIST, 2001, 158 (02) :124-135
[8]   TRANSPLANTATION-TAGGING-EXPERIMENTS IN PRELIMINARY STUDIES OF MIGRATION OF COD OFF NORWAY [J].
GODO, OR .
ICES JOURNAL OF MARINE SCIENCE, 1995, 52 (06) :955-962
[9]   One species with two biologies:: Atlantic salmon (Salmo salar) in the wild and in aquaculture [J].
Gross, MR .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1998, 55 :131-144
[10]  
Hansen MM, 2001, ECOL APPL, V11, P148, DOI 10.1890/1051-0761(2001)011[0148:BTSTSI]2.0.CO