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Radioactive strontium ( 85 Sr) in marking newly hatched pike and success of stocking
Author(s) -
Vuorinen P. J.,
Nyberg K.,
Lehtonen H.
Publication year - 1998
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1998.tb00798.x
Subject(s) - pike , stocking , biology , zoology , esox , strontium , predation , fishery , fish <actinopterygii> , ecology , chemistry , organic chemistry
Immersion of newly hatched pike fry in an aqueous solution of 1·85 MBq ml −1 85 Sr did not affect their growth or survival over 3 weeks. Cannibal pike fry retained only l.2–3·3% of the 85 Sr from their labelled prey. Newly hatched 85 Sr‐marked fry stocked into two lakes in 3 years were distinguishable from wild fish 4–6 weeks later. Stocked and wild fry grew equally well, and stocked pike survived best where density of wild pike was highest. There was no evidence of increase in density as a result of Stocking.