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Post‐stocking Movements and Recapture of Hatchery‐reared Trout Released into Flowing Waters ‐ Effect of a Resident Wild Population
Author(s) -
Cresswell R.C.,
Williams R.
Publication year - 1984
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1984.tb00577.x
Subject(s) - stocking , biology , brown trout , salmo , hatchery , fishery , electrofishing , trout , mark and recapture , population , fish <actinopterygii> , catch and release , zoology , recreational fishing , demography , sociology
The post‐stocking movements and survival of hatchery‐reared brown trout ( Salmo trutta L.) (length 18–19 cm) stocked into depopulated and control stretches of the Afon Clettwr, South Wales, were investigated. Data were obtained from electrofishing surveys and rewarded tag returns. Recapture rates ranged from 67–76% for both stretches. The resident population of wild brown trout had no significant effect on the dispersion of the stocked fish, the majority of which remained close to the point of stocking. No stocked fish were recovered from the experimental stretches in the year following their introduction. Within one year the depopulated stretch had been recolonized by wild trout. The implications upon restocking after a fish kill are discussed.