Intra- and inter-specific competition for winter concealment habitat in juvenile salmonids

被引:42
作者
Harwood, AJ
Metcalfe, NB
Griffiths, SW
Armstrong, JD
机构
[1] Univ Glasgow, Inst Biomed & Life Sci, Fish Biol Grp, Glasgow G12 8QQ, Lanark, Scotland
[2] Fisheries Res Serv Freshwater Lab, Pitlochry PH16 5LB, Perthshire, Scotland
[3] Cardiff Sch Biosci, Cardiff CF10 3TL, S Glam, Wales
关键词
D O I
10.1139/F02-119
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
The availability of streambed refuges has previously been shown to be of critical importance to the survival of overwintering juvenile salmonids. We used semi-natural stream channels to quantify intra- and inter-specific competition for daytime refuges and the willingness of Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) to share available shelter. Refuge use was frequently associated with aggressive behaviour when two fish were provided with only one shelter, with intra- and inter-specific competition being similar in intensity. Resident individuals were less likely to leave the refuge than were intruders, and sharing of refuges was uncommon, both when competing for one shelter (experiment I) and when these were provided in excess (experiment II). Fish showed greater preferences for foraging habitat during the night than for the location of daytime shelters and were therefore willing to shift habitats to find adequate shelter. Overall, these results suggest that winter competition for refuges, both within and between species of salmonid, is likely to be intense if refuge availability is limited in the wild.
引用
收藏
页码:1515 / 1523
页数:9
相关论文
共 40 条
[1]   Density-dependent refuge use among over-wintering wild Atlantic salmon juveniles [J].
Armstrong, JD ;
Griffiths, SW .
JOURNAL OF FISH BIOLOGY, 2001, 58 (06) :1524-1530
[2]  
BJORNN TC, 1971, T AM FISH SOC, V100, P423, DOI 10.1577/1548-8659(1971)100<423:TASMIT>2.0.CO
[3]  
2
[4]   Interspecific shelter competition between the sympatric crayfish species Procambarus clarkii (Girard) and Procambarus zonangulus (Hobbs and Hobbs) [J].
Blank, GS ;
Figler, MH .
JOURNAL OF CRUSTACEAN BIOLOGY, 1996, 16 (02) :300-309
[5]   Atlantic salmon (Salmo salar) in winter:: "the season of parr discontent"? [J].
Cunjak, RA ;
Prowse, TD ;
Parrish, DL .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1998, 55 :161-180
[8]   The worm re-turns: Hiding behavior of a tube-dwelling marine polychaete, Serpula vermicularis [J].
Dill, LM ;
Fraser, AHG .
BEHAVIORAL ECOLOGY, 1997, 8 (02) :186-193
[9]  
Dytham C., 2011, Choosing and Using Statistics. A Biologist's Guide
[10]   GROWTH, SURVIVAL AND PRODUCTION OF JUVENILE SALMON AND TROUT IN A SCOTTISH STREAM, 1966-75 [J].
EGGLISHAW, HJ ;
SHACKLEY, PE .
JOURNAL OF FISH BIOLOGY, 1977, 11 (06) :647-672