Premium
Survival and Behavior of Sockeye Salmon Fry Migrating into Brooks Lake, Alaska
Author(s) -
Hartman Wilbur L.,
Strickland Charles W.,
Hoopes David T.
Publication year - 1962
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(1962)91[133:saboss]2.0.co;2
Subject(s) - fishery , geography , biology
This paper describes the behavior of sockeye salmon fry (Oncorhynchus nerka) during their migration from stream spawning gravels to lake nursery areas. Fry were negatively phototactic, sought holding areas along stream banks during daylight hours, and only left holding areas and gravel to migrate during the darkest hours of the night. Fry migrated as individuals, facing downstream, and usually exhibited swimming movements. Certain features of the migratory behavior are discussed in terms of survival values in the face of intense piscivorous predation.