dc.contributor.advisor |
Professor Scott Baker |
en |
dc.contributor.advisor |
Dr. Stuart Parsons |
en |
dc.contributor.advisor |
Dr. Shane Lavery |
en |
dc.contributor.author |
Wiseman, Nicky |
en |
dc.date.accessioned |
2008-07-31T19:51:44Z |
en |
dc.date.available |
2008-07-31T19:51:44Z |
en |
dc.date.issued |
2008 |
en |
dc.identifier.citation |
Thesis (PhD--Biological Sciences)--University of Auckland, 2008. |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/2612 |
en |
dc.description |
Whole document restricted, but available by request, use the feedback form to request access. |
en |
dc.description.abstract |
Little long-term research has been conducted in the Hauraki Gulf on Bryde’s whales;
the least studied baleen whale. This thesis investigates this population using photoidentification
and sighting records obtained from boat-based opportunistic surveys
and genetic analyses of samples from living and `stranded’ whales.
Samples from `stranded’ Bryde’s whales have been collected since 1994 from the
North Island of New Zealand. In addition, biopsy samples were collected from
whales in the Hauraki Gulf. Fifty-two samples from `stranded’ and biopsied Bryde’s
whales identified 49 unique individuals using 12 polymorphic microsatellites. The
sex ratio for both sample collection types were equal with 22 males : 23 females (the
sex of four could not be determined). MtDNA D-loop analysis (~800 bp) identified
the samples as being consistent with Balaenoptera brydei with 11 haplotypes defined
by 16 variable sites. Comparisons with published sequences (373 bp) revealed three
shared haplotypes between the North Pacific and Indian Oceans. However, an
AMOVA (FST and ΦST) showed high levels of differentiation between these oceans,
likely resulting from ancestral gene flow.
Between March 2001 and February 2006, 1,102 boat-based surveys were conducted
during which there were 1,059 sightings over 521 days of Bryde’s whales (including
two birth-length calves) in the Gulf. Since whales with calves, were observed during
all months this suggests that the Hauraki Gulf is an important area for breeding
whales. The seasonal change in `trip encounter rate’ indicated that some whales leave
the Gulf for part of the year. Whales in the Gulf were observed in shallower (12.1 to
59.8 m) and cooler (12 to 24.5oC) water than has generally been reported elsewhere.
Balaenoptera brydei corresponds to the form described in the offshore waters of the
western North Pacific. In contrast, their habitat use in the Hauraki Gulf was more
consistent with the `inshore’ form from the coasts off South Africa. |
en |
dc.language.iso |
en |
en |
dc.publisher |
ResearchSpace@Auckland |
en |
dc.relation.ispartof |
PhD Thesis - University of Auckland |
en |
dc.relation.isreferencedby |
UoA1824394 |
en |
dc.rights |
Whole document restricted but available by request. Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.rights.uri |
http://creativecommons.org/licenses/by-nc-sa/3.0/nz/ |
en |
dc.title |
Genetic identity and ecology of Bryde's whales in the Hauraki Gulf, New Zealand |
en |
dc.type |
Thesis |
en |
thesis.degree.discipline |
Biological Sciences |
en |
thesis.degree.grantor |
The University of Auckland |
en |
thesis.degree.level |
Doctoral |
en |
thesis.degree.name |
PhD |
en |
dc.rights.holder |
Copyright: The author |
en |
pubs.local.anzsrc |
06 - Biological Sciences |
en |
pubs.org-id |
Faculty of Science |
en |
dc.identifier.wikidata |
Q112878648 |
|