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Smolt size in relation to age at first maturity of Atlantic salmon ( Salmo salar ): the role of lacustrine habitat
Author(s) -
O'Connell M. F.,
Ash E. G. M.
Publication year - 1993
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.1095-8649.1993.tb00359.x
Subject(s) - salmo , habitat , biology , fluvial , fishery , maturity (psychological) , ecology , smoltification , life history , salmonidae , fish <actinopterygii> , paleontology , psychology , developmental psychology , structural basin
Back‐calculated growth and size of Atlantic salmon smolts were compared in two groups of river systems in Newfoundland. One group consisted of rivers dominated by lacustrine habitats while the other had rivers characterized by fluvial habitats. Back‐calculated length at each age and smolt size was significantly higher for the rivers dominated by lacustrine habitats. Associated with this was a lower proportion of maiden large salmon in adult returns. These findings are discussed in relation to density in fresh water, environmental conditions at sea, and life‐history strategy.