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Territorial competition among wild brown trout fry: effects of ownership and body size
Author(s) -
Johnsson J. I.,
Nöbbelin F.,
Bohlin T.
Publication year - 1999
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1999.tb00846.x
Subject(s) - biology , competition (biology) , brown trout , trout , affect (linguistics) , logistic regression , fishery , zoology , ecology , demographic economics , fish <actinopterygii> , statistics , economics , sociology , mathematics , communication
The effects of ownership, energy status and relative size on the ability to defend a territory were studied in dyadic contests among wild brown trout fry. A logistic regression showed that the territory owner won 85% of the contests with opponents of equal size, and that a 30% size advantage was required to balance the advantage of ownership. Energy status did not affect the ability to win territorial contests.