Impacts of External and Surgery-Based Tagging Techniques on Small Northern Pike Under Field Conditions

Autor: Petr Zajicek, Thilo Pagel, Robert Arlinghaus, Daniel Hühn, Thomas Klefoth
Rok vydání: 2014
Předmět:
Zdroj: North American Journal of Fisheries Management. 34:322-334
ISSN: 1548-8675
0275-5947
DOI: 10.1080/02755947.2014.880762
Popis: In Northern Pike Esox lucius negligible effects of external tags on growth and survival have commonly been reported, but no studies exist for age-0 fish. We tested the impacts of fin clipping, PIT tags, and three external tags (T-bar anchor, opercular, and streamer tags) on age-0 Northern Pike in a pond. We also examined the impacts of surgically implanted transmitters on small adult Northern Pike in a natural lake. The loss of PIT tags was lowest among all tags and close to 0%. Of the external tags, T-bar anchor tags performed best. Loss of these tags was initially low (on average 5.7% after 195 d) increasing to about 20.0% by 520 d posttagging. Tagging-induced mortality of a few percent was present in all tags tested within the first 195 d posttagging in the pond environment but not present afterwards. The PIT tags, fin clips, and external tags did not affect the growth or condition of surviving fish. Surgically implanted transmitters reduced the growth of small adult Northern Pike with total le...
Databáze: OpenAIRE
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