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Evaluation of Oxytetracycline Marks in Sagittal Otoliths of Juvenile Black Crappies
Author(s) -
Conover Greg A.,
Sheehan Robert J.
Publication year - 1996
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(1996)016<0686:eoomis>2.3.co;2
Subject(s) - juvenile , oxytetracycline , fish <actinopterygii> , biology , zoology , fishery , ecology , antibiotics , microbiology and biotechnology
We validated oxytetracycline (OTC) mark production in the sagittal otoliths of juvenile black crappies Pomoxis nigromaculatus . Black crappies were marked en masse by immersion in a 500‐mg oxytetracycline hydrochloride/L solution for 6 h. The exposure to OTC did not diminish survival over 31 weeks. The technique effectively marked 88% of the black crappies, based on observations of one sagitta from each fish. Only 2% of the control black crappies were incorrectly classified as marked, and observer experience did not affect correct classification rate. Because we marked fish late in the growing season, the marks appeared in the annulus; OTC marks applied when fish are growing faster may be more readily discernable.