Southern right whales wintering in the Auckland Islands, 1995-1998

Latest version published by Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node on Dec 29, 2019 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node

Historically, southern right whales were widely distributed in New Zealand waters. This population, was driven to commercial extinction following extensive exploitation during the early 19th century (Dawbin 1986). It was further depleted by illegal Soviet hunting in 1950-1970 (Tormosov et al. 1998). While right whale sightings around mainland New Zealand remain rare, up to 165 whales can be found at the Auckland Is in a single day during winter. Despite what appears to be adequate habitat along the eastern coastline, the whales' distribution is largely limited to Port Ross, Laurie Harbour and waters around Enderby I. The relatively small area where so many whales congregate means that at peak season the density of whales at the Auckland Is is very high (approximately 8 whales/km2). The residency period extends from at least early May to at least the end of September, with peak numbers in July and August.

Data Records

The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 546 records.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.

Downloads

Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:

Data as a DwC-A file download 546 records in English (18 KB) - Update frequency: not planned
Metadata as an EML file download in English (7 KB)
Metadata as an RTF file download in English (10 KB)

Versions

The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Patenaude N (2019): Southern right whales wintering in the Auckland Islands, 1995-1998. v1.0. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Dataset/Occurrence. https://nzobisipt.niwa.co.nz/resource?r=southernrightwhales_auck&v=1.0

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License.

GBIF Registration

This resource has not been registered with GBIF

Keywords

Occurrence

Contacts

Who created the resource:

Nathalie Patenaude
Researcher
School of Biological Sciences, University of Auckland Auckland NZ

Who can answer questions about the resource:

Nathalie Patenaude
Researcher
School of Biological Sciences, University of Auckland Auckland NZ

Who filled in the metadata:

Nathalie Patenaude
Researcher
School of Biological Sciences, University of Auckland Auckland NZ

Geographic Coverage

Auckland Islands

Bounding Coordinates South West [-50.611, 166.124], North East [-50.456, 166.385]

Taxonomic Coverage

Southern right whale

Species  Eubalaena australis

Temporal Coverage

Start Date / End Date 1995-08-01 / 1998-08-31

Sampling Methods

In order to determine the minimum number of southern right whales visiting the Auckland Is each winter, combined non-systematic small boat and shore-based surveys of right whales were conducted within Port Ross and surrounding areas. The boat surveys were conducted along the centre-line of the harbour, and visibility (during most surveys) allowed scanning to the extent of both coastlines. Simultaneously, other observers conducted shore-based counts from several elevated vantage points on Enderby and Auckland Is.

Study Extent Port Ross, Laurie Harbour and waters around Enderby Island, Auckland Islands, New Zealand

Method step description:

  1. During these surveys, a sighting was considered to include only one individual unless more than one individual could be counted at the surface within one and a half whale body lengths. Thus these censuses represent a minimum estimate of the number of whales observed on each occasion
  2. For all observations, an animal was judged to be a calf when the portion visible at the surface was less than half of the length of an accompanying adult. The accompanying adult was assumed to be the cow.

Bibliographic Citations

  1. Patenaude, NJ., 2000. Southern right whales wintering in the Auckland Islands. Conservation Advisory Science Notes No. 321, Department of Conservation, Wellington. https://www.doc.govt.nz/globalassets/documents/science-and-technical/casn321.pdf

Additional Metadata

marine, harvested by iOBIS

Alternative Identifiers https://nzobisipt.niwa.co.nz/resource?r=southernrightwhales_auck