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Hooking Mortality of Lake‐dwelling Landlocked Atlantic Salmon, Salmo salar
Author(s) -
Warner Kendall
Publication year - 1978
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1978)107<518:hmolla>2.0.co;2
Subject(s) - salmo , landlocked country , fishery , biology , fish <actinopterygii> , ecology , environmental science , political science , law
To evaluate hooking mortality of lake‐angled landlocked Atlantic salmon (Salmo salar), angled and net‐trapped (control) fish were held for 5 days after capture in each spring and fall for 4 yr. Angled fish suffered a significantly greater mortality than controls in both spring (P < 0.001) and fall (P < 0.05). Mortality of fall‐angled salmon was significantly less than that of spring‐angled fish (P < 0.01). No significant differences (P > 0.05) were found between hooking mortality of age II and III fish, nor between legal‐sized (⩾356 mm, total length) and sublegal salmon. Most mortality occurred within 24 h of hooking. No significant differences (P > 0.05) were found between mortality caused by single‐ and treble‐hook gears, nor between flies and lures. Mortality of gill‐hooked fish was significantly greater (P < 0.001) than that of salmon hooked in the mouth area. No particular gear, hook, or lure type was more prone to hook fish in vital anatomical locations. Mortality of fish bleeding from hooking was significantly greater (P < 0.001) than that of nonbleeding fish. Hooking deaths (y) were predicted accurately from accumulated angler‐hours (x) by the formula: y = 2.772 + 0.029x.