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- Title
Spawning site fidelity of wild and hatchery lake trout ( Salvelinus namaycush) in northern Lake Huron.
- Authors
Binder, Thomas R.; Riley, Stephen C.; Holbrook, Christopher M.; Hansen, Michael J.; Bergstedt, Roger A.; Bronte, Charles R.; He, Ji; Krueger, Charles C.; Jech, Josef Michael
- Abstract
Fidelity to high-quality spawning sites helps ensure that adults repeatedly spawn at sites that maximize reproductive success. Fidelity is also an important behavioural characteristic to consider when hatchery-reared individuals are stocked for species restoration, because artificial rearing environments may interfere with cues that guide appropriate spawning site selection. Acoustic telemetry was used in conjunction with Cormack-Jolly-Seber capture-recapture models to compare degree of spawning site fidelity of wild and hatchery-reared lake trout ( Salvelinus namaycush) in northern Lake Huron. Annual survival was estimated to be between 77% and 81% and did not differ among wild and hatchery males and females. Site fidelity estimates were high in both wild and hatchery-reared lake trout (ranging from 0.78 to 0.94, depending on group and time filter), but were slightly lower in hatchery-reared fish than in wild fish. The ecological implication of the small difference in site fidelity between wild and hatchery-reared lake trout is unclear, but similarities in estimates suggest that many hatchery-reared fish use similar spawning sites to wild fish and that most return to those sites annually for spawning.
- Subjects
LAKE Huron (Mich. &; Ont.); LAKE trout; FISH spawning; LAKE trout -- Artificial spawning; MARK &; recapture (Population biology)
- Publication
Canadian Journal of Fisheries & Aquatic Sciences, 2016, Vol 73, Issue 1, p18
- ISSN
0706-652X
- Publication type
Article
- DOI
10.1139/cjfas-2015-0175