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Using Directional Feeders to Feed Juvenile Coho Salmon in an Attempt to Increase Adult Survivals
Author(s) -
Tipping Jack M.
Publication year - 2008
Publication title -
north american journal of aquaculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 41
eISSN - 1548-8454
pISSN - 1522-2055
DOI - 10.1577/a07-060.1
Subject(s) - juvenile , biology , oncorhynchus , fishery , fish <actinopterygii> , zoology , ecology
This study compared adult survivals of juvenile coho salmon Oncorhynchus kisutch fed with nonmoving directional feeders with fish fed by hand. In each of 2 years, two net‐pens each of coded‐wire‐tagged coho salmon juveniles were fed with either directional feeders or by hand from January until release in May–June. Adult return rates were compared using analysis of variance, and no significant difference in fish survival was detected between the two feeding methods; mean recoveries were 2.43% and 2.45% for directional‐feeder and hand‐fed fish, respectively. However, directional feeders could provide labor savings if water‐feed fouling were avoided.