Index Catalog // ScholarsArchive@OSU

Creator:: Palacios, Daniel M., Mate, Bruce R., Baker, C. Scott, Hayslip, Craig E., Follett, Thomas M., Steel, Debbie, Lagerquist, Barbara A., Irvine, Ladd M., and Winsor, Martha H.
Abstract:: In 2014, Oregon State University (OSU) initiated a multi-year project to study humpback whale (Megaptera novaeangliae) migrations in the North Pacific Ocean using satellite tracking technology in combination with genetic and photo-identification (photo-ID) analyses. The study is highly relevant to management, given the need for new information arising from the...
Resource Type:: Technical Report

Creator:: Torres, Leigh G., Rayment, Will, Olavarría, Carlos, Thompson, David R., Graham, Brittany, Baker, C. Scott, Patenaude, Nathalie, Bury, Sarah Jane, Boren, Laura, Parker, Graham, and Carroll, Emma L.
Abstract:: Since the decimation of the southern right whale Eubalaena australis population in New Zealand by whaling, research on its recovery has focused on the wintering ground at the Auckland Islands, neglecting potentially important wintering habitat at Campbell Island. For the first time in 20 years we conducted an expedition to...
Resource Type:: Article

Creator:: Alexander, Alana, Steel, Debbie, Hoekzema, Kendra, Mesnick, Sarah L., Engelhaupt, Daniel, Kerr, Iain, Payne, Roger, and Baker, C. Scott
Abstract:: The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Worldwide mtDNA diversity is relatively low, but highly structured...
Resource Type:: Article

Creator:: Jackson, Jennifer A., Carroll, Emma L., Smith, Tim D., Zerbini, Alexandre N., Patenaude, Nathalie J., and Baker, C. Scott
Abstract:: Accurate estimation of historical abundance provides an essential baseline for judging the recovery of the great whales. This is particularly challenging for whales hunted prior to twentieth century modern whaling, as population-level catch records are often incomplete. Assessments of whale recovery using pre-modern exploitation indices are therefore rare, despite the...
Resource Type:: Article

Creator:: Hamner, Rebecca M., Wade, Paul, Oremus, Marc, Stanley, Martin, Brown, Phillip, Constantine, Rochelle, and Baker, C. Scott
Abstract:: The New Zealand endemic Maui’s dolphin Cephalorhynchus hectori maui is characterized by several life history traits thought to be important predictors of extinction risk in marine mammals, including a slow rate of reproduction, small geographic range, small group size, and coastal distribution. We continued the genetic monitoring of the remnant...
Resource Type:: Article

Creator:: Caballero, Susana, Duchêne, Sebastian, Garavito, Manuel F., Slikas, Beth, and Baker, C. Scott
Abstract:: A small number of cetaceans have adapted to an entirely freshwater environment, having colonized rivers in Asia and South America from an ancestral origin in the marine environment. This includes the 'river dolphins', early divergence from the odontocete lineage, and two species of true dolphins (Family Delphinidae). Successful adaptation to...
Resource Type:: Article

Creator:: Sremba, Angela L., Hancock-Hanser, Brittany, Branch, Trevor A., LeDuc, Rick L., and Baker, C. Scott
Abstract:: The Antarctic blue whale (Balaenoptera musculus intermedia) was hunted to near extinction between 1904 and 1972, declining from an estimated initial abundance of more than 250,000 to fewer than 400. Here, we describe mtDNA control region diversity and geographic differentiation in the surviving population of the Antarctic blue whale, using...
Resource Type:: Article

Creator:: Constantine, Rochelle, Jackson, Jennifer A., Steel, Debbie, Baker, C. Scott, Brooks, Lyndon, Burns, Daniel, Clapham, Phillip, Hauser, Nan, Madon, Benedicte, Mattila, David, Oremus, Marc, Poole, Michael, Robbins, Jooke, Thompson, Kirsten, and Garrigue, Claire
Abstract:: Estimating the abundance of long-lived, migratory animals is challenging but essential for managing populations. We provide the first abundance estimates of endangered humpback whales Megaptera novaeangliae from their breeding grounds in Oceania, South Pacific. Using fluke photo-identification (1999−2004, n = 660 individuals) and microsatellite genotypes (1999−2005, n = 840 individuals),...
Resource Type:: Article

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