Effects of Fish Length and Anatomical Placement on Retention of Visible Implant Alpha Tags in Hatchery-Reared Rainbow Trout

Autor: Austin G. Galinat, Michael E. Barnes, Jacob L. Davis, Jeremy L. Kientz
Rok vydání: 2014
Předmět:
Zdroj: North American Journal of Fisheries Management. 34:932-937
ISSN: 1548-8675
0275-5947
Popis: We examined the effects of anatomical placement and fish TL on 8-month retention of standard-sized (1.2 × 2.7 mm) visible implant alpha (VIA) tags in 255 Rainbow Trout Oncorhynchus mykiss (128–368 mm TL) at 14-d intervals in a hatchery setting. Anatomical placement was strongly associated with tag retention at each sampling period following day 154, culminating with significantly fewer (P < 0.05) VIA tags retained in anal fin tissue (25%) than in postorbital adipose tissue (55%) on day 224. Logistic regression models suggested that TL was more strongly associated with retention when VIA tags were placed in postorbital adipose tissue than in anal fins. Visible implant alpha tag retention was significantly associated with TL for placement in the postorbital adipose tissue at each 14-d interval. Tag retention in anal fin tissue was associated with TL during the first 6-month period of the study and became less significant after day 182. Overall tag retention rates were lowest for fish < 200 mm TL at ...
Databáze: OpenAIRE
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