Accession Number : ADA490026


Title :   Worldwide Population Structure in Cuvier's Beaked Whales: Identification of Units for Conservation


Descriptive Note : Final rept. for 10 Aug 2005-10 Aug 2006 and 1 May 2007-1 May 2008


Corporate Author : NEW SOUTH WALES UNIV SYDNEY (AUSTRALIA)


Personal Author(s) : Dalebout, Merel


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a490026.pdf


Report Date : Sep 2008


Pagination or Media Count : 21


Abstract : This report summarizes the research conducted under two contracts from the Southwest Fisheries Science Center, La Jolla, CA, using funding from the Office of Naval Operations (N45), Washington, DC, and the Naval Postgraduate School, Monterey, CA. Small bone samples from over 500 Cuvier's beaked whales (Ziphius cavirostris) representing populations worldwide were collected from museums and other institutions. Genetic analysis of mitochondrial DNA (mtDNA) control region and cytochrome b diversity is underway. These data will be used for a robust statistical assessment of genetic differentiation between populations at regional and ocean basin levels and estimation of rates of dispersal, allowing units for conservation to be identified. Information on the mtDNA haplotype and sex of each specimen will also be provided. Preliminary median-spanning network reconstructions and analyses of molecular variance (AMOVA) for a subset of samples (control region -- 317 base pairs, n = 219; cytochrome b -- 326 base pairs, n = 190) revealed strong differentiation among the three ocean basins (North Atlantic, North Pacific, and Southern Hemisphere) at the haplotype and nucleotide level (p 0.0001). There also is possible evidence of historical movements of these whales between the Atlantic and Pacific Oceans prior to the closure of the Isthmus of Panama approximately 3 million years ago. DNA extraction and sequencing are ongoing. The final deliverables for these contracts are expected in approximately 6 months' time.


Descriptors :   *POPULATION , *DEOXYRIBONUCLEIC ACIDS , *SOFT TISSUES , *WHALES , *BONES , *GENETICS , *GENES , SOUTHERN HEMISPHERE , NORTH ATLANTIC OCEAN , COLLECTION , OCEAN BASINS , NORTH PACIFIC OCEAN , MITOCHONDRIA , SEX , EXTRACTION , PATTERNS , SAMPLING , STATISTICAL ANALYSIS


Subject Categories : Genetic Engineering and Molecular Biology
      Biology


Distribution Statement : APPROVED FOR PUBLIC RELEASE