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Observations on the spawning behaviour of male and female adult sea trout, Salmo trutta L., using radio‐telemetry
Author(s) -
EVANS D.M.
Publication year - 1994
Publication title -
fisheries management and ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 55
eISSN - 1365-2400
pISSN - 0969-997X
DOI - 10.1111/j.1365-2400.1970.tb00009.x
Subject(s) - salmo , spawn (biology) , fishery , trout , telemetry , salmonidae , biology , brown trout , salvelinus , dominance (genetics) , fish <actinopterygii> , biochemistry , gene , engineering , aerospace engineering
The spawning behaviour of adult sea trout, Salmo trutta L., was studied using 174 MHz radio transmitters inserted into the stomachs. Sea trout were captured near the spawning beds and tracked prior to, during and after spawning. Ascent into the spawning river was shown to be linked to increases in flow for some fish but not others; the latter fish tended to move at night. Female sea trout were shown to spawn over 1–3 days, with preference for spawning during darkness, before leaving rapidly as kelts. Size was shown to be important in determining dominance among males, with up to 10 males accompanying one female. Males were shown to spawn with more than one female, and to leave and re‐enter the river on a number of occasions.