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Control of lake trout reproduction: role of lipids
Author(s) -
Aenderson B. A.,
Wong J. L.
Publication year - 1998
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.1095-8649.1998.tb00605.x
Subject(s) - trout , biology , reproduction , zoology , fishery , salmonidae , ecology , fish <actinopterygii> , rainbow trout
Somatic lipid density of lake trout decreased during summer and increased after spawning in October, peaking April, prior to ovarian recrudescence. Non‐lipid density increased from June or July until August and remained relatively constant until March. All lake trout ( n =30) reared on high ( n =10, 0·4%), medium ( n =10, 0·15%) and low ( n =10, 0·05%) rations from March to September spawned. In a second experiment for which the treatments commenced in November, the proportion of females maturing in the following October (high=88%, medium=69%, low=28%) was positively related to ration levels.