Evaluating post-release behaviour modification in large pelagic fish deployed with pop-up satellite archival tags
<qd> Hoolihan, J. P., Luo, J., Abascal, F. J., Campana, S. E., De Metrio, G., Dewar, H., Domeier, M. L., Howey, L. A., Lutcavage, M. E., Musyl, M. K., Neilson, J. D., Orbesen, E. S., Prince, E. D., and Rooker, J. R. Evaluating post-release behaviour modification in large pelagic fish deployed...
Published in: | ICES Journal of Marine Science |
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Main Authors: | , , , , , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
Oxford University Press
2011
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Subjects: | |
Online Access: | http://icesjms.oxfordjournals.org/cgi/content/short/fsr024v1 https://doi.org/10.1093/icesjms/fsr024 |
Summary: | <qd> Hoolihan, J. P., Luo, J., Abascal, F. J., Campana, S. E., De Metrio, G., Dewar, H., Domeier, M. L., Howey, L. A., Lutcavage, M. E., Musyl, M. K., Neilson, J. D., Orbesen, E. S., Prince, E. D., and Rooker, J. R. Evaluating post-release behaviour modification in large pelagic fish deployed with pop-up satellite archival tags. – ICES Journal of Marine Science, doi:10.1093/icesjms/fsr024. </qd>Post-release behaviour modification, possibly a result of capture and handling stress, was evaluated using empirical eigenfunction analysis to detect changes in vertical movement patterns recorded by 183 pop-up satellite archival tags (PSATs) deployed on large pelagic fish. Argos-transmitted summary, timed interval, and some archival data were included. Scoring of irregular post-release behaviour was based on a separation of plotted eigenfunction coefficient values by their mean, with the transection across the mean reference line denoting the duration of irregular behaviour. In all, 67 (36.6%) individual fish exhibited irregular behaviour, lasting from 3 to 60 d (mean = 15.8, s.d. = 10.4). An additional 27 (14.8%) displayed patterns suggestive of irregular behaviour. Data quality and quantity were important criteria for revealing behaviour patterns. Irregular behaviour was detected in 32.6% of Argos-transmitted dataseries, increasing to 60.6% in the higher-resolution archival series. Decreased vertical movement characterized the irregular behaviour of blue sharks ( Prionace glauca ) and porbeagles ( Lamna nasus ), whereas all other species showed increased vertical activity. The approach described provides a useful method of revealing behavioural modification during the post-release recovery period of PSAT-tagged large pelagic fish, although the extent of influence on normal behaviour is not fully understood. |
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