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Differential effects of internal tagging depending on depth treatment in Atlantic salmon:a cautionary tale for aquatic animal tag use

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Current Zoology 2019年第6期65卷 665-673页

作者： Daniel W.WRIGHT Lars H.STIEN Tim DEMPSTER Frode oPPEDAL Institute of Marine Research Matre Research StationMatredalNorway Sustainable Aquaculture Laboratory-Temperate and Tropical School of BioSciencesUniversity of MelbourneParkvilleAustralia

Electronic tags are widespread tools for studying aquatic animal behavior;however,tags risk behavioral manipulation and negative welfare *** an experiment to test behavioral differences of Atlantic salmon Sal mo salar in different aquaculture cage types,including ones expected to elicit deeper swimming behavior,we found negative tagging effects depending on whether cages were *** the experiment,data storage tags implanted in Atlantic salmon tracked their depth behavior and survival in unmodified sea-cages and depth-modified seacages that forced fish below or into a narrow seawater-or freshwater-filled snorkel tube from a 4 m net roof to the *** tagged individuals survived in unmodified cages;however,survival was reduced to 62%in depth-modified *** in depth-modified cages spent considerably less time above 4 m than those in unmodified cages,and dying individuals in depth-modified cages tended to position in progressively shallower *** maximum depth that fish in our study could attain neutral buoyancy was estimated at 22 m in *** calculated that the added tag weight in water reduced this to 8 m,and subtracting the tag volume from the peritoneal cavity where the swim bladder reinflates reduced this further to 4 *** conclude that the internal tag weight and volume affected buoyancy regulation as well as the survival and behavior of tagged *** tagging studies on aquatic animals should carefully consider the buoyancy-related consequences of internal tags with excess weight in water,and the inclusion of data from dying tagged animals when estimating normal depth behaviors.

关键词： Atlantic salmon physostome Salmo salar swim bladder swimming depth tagging effects

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