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Experimental Marking of Emergent Pink Salmon (Oncorhynchus gorbuscha) Fry with Sprayed Fluorescent Pigment
Author(s) -
Hennick Daniel P.,
Tyler Richard W.
Publication year - 1970
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(1970)99<397:emoeps>2.0.co;2
Subject(s) - oncorhynchus , salt water , fishery , zoology , biology , significant difference , fluorescent light , pigment , fish <actinopterygii> , fluorescence , chemistry , environmental science , mathematics , environmental engineering , statistics , physics , organic chemistry , quantum mechanics
The effects of various spraying pressures in fluorescent pigment marking on mark retention and mortality of emergent pink salmon fry were determined. The fry were sprayed in groups of 1,000 at pressures of 110, 90, 70 p.s.i., and were held with a control group in salt water in live pens for 31 days. The experiment was terminated at this time because of the effects of starvation on the fry. Checks at 14 and 31 days postmarking showed no significant difference in mark retention between groups (mean rate = 76.2%) and no loss of marks between check periods. Mortalities due to marking occurred entirely during the first 2 days postmarking and were related directly to spraying pressure (8.9% at 110 p.s.i.; 3.6% at 90 p.s.i.; 0.5% at 70 p.s.i.).