Descripción
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.
Registros
Los datos en este recurso de registros biológicos han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 546 registros.
Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.
Versiones
La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.
¿Cómo referenciar?
Los usuarios deben citar este trabajo de la siguiente manera:
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
Derechos
Los usuarios deben respetar los siguientes derechos de uso:
El publicador y propietario de los derechos de este trabajo es Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).
Registro GBIF
Este recurso no ha sido registrado en GBIF
Palabras clave
Occurrence
Contactos
- Proveedor De Los Metadatos ●
- Originador ●
- Punto De Contacto
Cobertura geográfica
Auckland Islands
| Coordenadas límite | Latitud Mínima Longitud Mínima [-50,611, 166,124], Latitud Máxima Longitud Máxima [-50,456, 166,385] |
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Cobertura taxonómica
Southern right whale
| Especie | Eubalaena australis |
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Cobertura temporal
| Fecha Inicial / Fecha Final | 1995-08-01 / 1998-08-31 |
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Métodos de muestreo
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.
| Área de Estudio | Port Ross, Laurie Harbour and waters around Enderby Island, Auckland Islands, New Zealand |
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Descripción de la metodología paso a paso:
- 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
- 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.
Referencias bibliográficas
- 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
Metadatos adicionales
marine, harvested by iOBIS
| Identificadores alternativos | https://nzobisipt.niwa.co.nz/resource?r=southernrightwhales_auck |
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