Premium
Benefits of repeated stocking with adult, hatchery‐reared brown trout, Salmo trutta , to recreational fisheries?
Author(s) -
BAER J.,
BLASEL K.,
DIEKMANN M.
Publication year - 2007
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.1365-2400.2006.00523.x
Subject(s) - stocking , brown trout , salmo , fishery , hatchery , fishing , trout , catch and release , biology , recreational fishing , fish <actinopterygii>
Recaptures of adult, hatchery‐reared, brown trout, Salmo trutta L., and fishing time from anglers were used to evaluate the benefits of stocking programmes with repeated releases of adult brown trout. The recapture rate varied between 17% and 29%. The time between stocking and capture (referred to as residence time) varied between 1 and 160 days (median 3–49 days). Between 67% and 84% of trout caught in the river were recently released fish. Fishing effort increased after stocking, thereby increasing the impact of angling on wild stocks. Stocking with adult brown trout decreases the impact of angling on wild trout only if the time spent fishing by all anglers is kept stable. Furthermore, because of the short residence time of stocked trout, long‐term impacts through competition for space and food, or genetic impact through introgression, are limited.