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2. It’s complicated and it depends: A review of the effects of ecosystem changes on Walleye and Yellow Perch Populations in North America

Author

Hansen, Gretchen J.A., primary, Ruzich, Jenna, additional, Krabbenhoft, Corey A., additional, Kundel, Holly, additional, Mahlum, Shad, additional, Rounds, Christopher I., additional, Van Pelt, Amanda O., additional, Eslinger, Lawrence D., additional, Logsdon, Dale E., additional, and Isermann, Daniel A., additional

Published
2022
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10. Oxytetracycline Marking of Newly Hatched Walleye Fry.

Author

Logsdon, Dale E., Pittman, Bruce J., and Barnard, Gary C.

Subjects
HATCHERY fishes, EGG incubation, WALLEYE (Fish), OXYTETRACYCLINE, FISHES
Abstract

Newly hatched walleye Sander vitreus (formerly Stizostedion vitreum) fry were treated by immersion in a solution of 700 mg of oxytetracycline hydrochloride (OTC)/L for 6 h to determine whether walleye fry could be marked at a younger age than previously described in the literature. The resulting marks varied in intensity but were observed on 100% of the fry inspected from groups that were treated at ages less than 24 h posthatch as well as those that were treated at ages less than 3 h posthatch. No false marks were observed on untreated controls in any of the treatment periods, and pond studies indicated no significant differences (P > 0.05) in either survival or growth between OTC-treated fry and untreated controls. The results of this study demonstrate that walleye fry can be successfully marked immediately after hatching and that the entire annual production of walleye fry at a hatchery can be marked without additional fry-holding facilities or significant disruption of routine hatchery operations. [ABSTRACT FROM AUTHOR]

Published
2004
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