June 7, 2013 — The development of a standardized killer-whale necropsy system has boosted the collection of complete data from killer-whale strandings from 2 percent to about 33 percent, according to a recent study from a team of scientists, including a University of California, Davis wildlife veterinarian.
The study, published recently in the journal Marine Mammal Science, suggests that the data can help scientists better understand the life history of the orca species.
The killer-whale necropsy system was co-developed by Joe Gaydos, director of the SeaDoc Society -- a program of the UC Davis Wildlife Health Center within the School of Veterinary Medicine -- and Stephen Raverty, veterinary pathologist with the British Columbia Ministry of Agriculture.
"Because killer whales are apex predators and flagship conservation species, strandings are sad events," said Gaydos. "But this study confirms that if we make every effort to understand why the strandings occurred, we will ultimately improve the fate of the species."
Gaydos and Raverty developed the standardized killer-whale necropsy system in 2004. The analysis of strandings since then has shown that the protocol, along with increased funding for southern resident killer-whale recovery, has increased the collection of complete data from killer-whale strandings. Traditionally, only one in 50 stranded whale cadavers would be analyzed; now one in three get a full examination.
The increased recovery funding was provided by the U.S. National Marine Fisheries Service and Canadian Department of Fisheries and Oceans.
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