Back to Search
Start Over
Evaluation of external operculum loop tags to individually identify cage-cultured Atlantic halibut Hippoglossus hippoglossus in commercial research trials
- Source :
- Journal of Fish Biology. 80:2267-2280
- Publication Year :
- 2012
- Publisher :
- Wiley, 2012.
-
Abstract
- The growth, survival and tag retention of double-tagged [external FT4 lock-on (FT4) and internal passive integrated transponder (PIT)-tagged] Atlantic halibut Hippoglossus hippoglossus were compared to internal PIT-tagged controls in a randomized trial. The objective was to assess the suitability of these tags for monitoring the performance of individual fish in longitudinal trials under commercial cage-culture conditions in the lower Bay of Fundy, New Brunswick, Canada. The FT4 tags were chosen due to their similarity to tags used by investigators to track H. hippoglossus in the wild. A subset of the population randomly received an external FT4 tag inserted through the operculum and were monitored over a 1105 day period. The specific growth rate of FT4-tagged fish was significantly reduced in the first sea summer with no significant difference observed for the remainder of the trial. The differential growth in the first sea summer created a relative size advantage, permitting controls to increase in size significantly faster than FT4 fish in all subsequent periods. The FT4 tags did not significantly influence survival under normal commercial cage-culture conditions. Results, however, suggest that the survival of FT4-tagged H. hippoglossus may be compromised during stressful handling events. Tag retention of FT4 tags was acceptable with 76% of tags remaining at the end of the 1105 day trial. FT4 tags proved to be an effective method to identify individual H. hippoglossus, with the caveat that they seriously bias productivity measures in commercial research trials.
- Subjects :
- Population
Animal Identification Systems
Fisheries
Flounder
Aquatic Science
Halibut
Random Allocation
Animal science
Aquaculture
Animals
New Brunswick
education
Ecology, Evolution, Behavior and Systematics
education.field_of_study
biology
business.industry
Significant difference
Reproducibility of Results
Hippoglossus hippoglossus
biology.organism_classification
Survival Analysis
Hippoglossus
Fishery
visual_art
visual_art.visual_art_medium
business
Cage
Operculum (gastropod)
hormones, hormone substitutes, and hormone antagonists
Subjects
Details
- ISSN :
- 00221112
- Volume :
- 80
- Database :
- OpenAIRE
- Journal :
- Journal of Fish Biology
- Accession number :
- edsair.doi.dedup.....14a275c58db382a816b0dcaf508aa23c