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dc.contributor.advisor Read, Andrew
dc.contributor.author Crain, Danielle
dc.date.accessioned 2012-04-27T02:06:34Z
dc.date.available 2012-04-27T02:06:34Z
dc.date.issued 2012-04-26
dc.identifier.uri http://hdl.handle.net/10161/5288
dc.description.abstract Remote biopsy sampling is a common method used to obtain tissue samples from wild cetaceans. Using this technique, researchers typically obtain a small sample of skin and blubber using a biopsy tip fired from a crossbow or modified air rifle. Analysis of these tissues can provide important information on specific identity, sex, pollutant levels, diet, and reproductive status, which are critical to studies of free-ranging cetaceans. Biopsy sampling is generally considered to be a relatively benign procedure, but all prior attempts to evaluate its impact have been subjective assessments of the behavioral response of individuals at the surface. The goal of the present study is to provide a quantitative assessment of the immediate effects of biopsy attempts on the behavior of short-finned pilot whales (Globicephala macrorhynchus) equipped with digital acoustic recording tags (DTags) off Cape Hatteras, North Carolina. A biopsy attempt was defined as any instance of contact between a biopsy dart with an animal. A series of five metrics was examined to determine if behavior of whales was affected by a biopsy attempt, including: foraging behavior (number of dives, depth, and number of prey capture attempts); time spent within 3 m of the surface; fine-scale body orientation; fluke rate and amplitude; and group vocalization rate. The short-term reactions to biopsy attempts appear to be ephemeral and should not compromise the fitness of the animal, although the effects of increasing the group vocalization rate after a biopsy attempt should be examined further. The results of this analysis provide the first subsurface, quantitative assessment of the short-term effects of biopsy sampling on cetaceans. en_US
dc.subject biopsy en_US
dc.subject behavioral responses en_US
dc.subject pilot whales en_US
dc.subject vocalization rate en_US
dc.subject DTag en_US
dc.title A quantitative analysis of the response of short-finned pilot whales, Globicephala macrorhynchus, to biopsy attempts en_US
dc.type Masters' project
dc.department Nicholas School of the Environment and Earth Sciences

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