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A Post‐hatching Sub‐gravel Stage in the Life History of the Arctic Grayling, Thymallus arcticus
Author(s) -
Kratt L. F.,
Smith R. J. F.
Publication year - 1977
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(1977)106<241:apssit>2.0.co;2
Subject(s) - grayling , hatching , substrate (aquarium) , arctic , fishery , biology , ecology , shore , zoology
Arctic grayling fry were not seen along shore or collected in traps set upstream and downstream of spawning areas until 4 to 5 days after we first observed fry in substrate samples. Fry were first captured in emergence traps 6 days after the first eggs had hatched in nearby substrate. Artificially incubated fry remained on the bottom of an incubating apparatus for 3 days before swimming to the surface. The yolk sac was absorbed during this interval. These observations are taken to indicate that Arctic grayling fry normally spend 3 to 4 days in the gravel substrate prior to emerging.