Descripción
Blue whale distribution in the Southern Hemisphere is poorly understood. Their survival is dependent on the ability to reliably encounter large aggregations of euphausiid prey. Therefore, documenting and protecting blue whale foraging grounds is fundamental to enhancing their recovery. Various data sources are compiled here to support the hypothesis that the South Taranaki Bight, between the north and south islands of New Zealand, is used as a foraging ground by blue whales for a common euphausiid prey that aggregate as a function of a nearby coastal upwelling system.
It is difficult to distinguish between an Antarctic and pygmy blue whale without genetic analysis and therefore sightings and strandings in the STB region were not recorded to subspecies. Hereafter, the term ‘blue whale’ refers to both subspecies in the Southern Hemisphere unless otherwise described to subspecies.
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 51 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:
Torres L G (2024). Blue whales sighting to 2013 in the South Taranaki Bight, New Zealand. Version 1.0. The National Institute of Water and Atmospheric Research (NIWA). Occurrence dataset. https://nzobisipt.niwa.co.nz/resource?r=bluewhale_forgaging_stbnz&v=1.0
Derechos
Los usuarios deben respetar los siguientes derechos de uso:
El publicador y propietario de los derechos de este trabajo es The National Institute of Water and Atmospheric Research (NIWA). Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).
Registro GBIF
Este recurso ha sido registrado en GBIF con el siguiente UUID: 1c015688-44a2-4de3-bb88-1995eac2180a. The National Institute of Water and Atmospheric Research (NIWA) publica este recurso y está registrado en GBIF como un publicador de datos avalado por GBIF New Zealand.
Palabras clave
Occurrence; Observation
Contactos
- Proveedor De Los Metadatos ●
- Originador ●
- Punto De Contacto
Cobertura geográfica
South Taranaki Bight, New Zealand
| Coordenadas límite | Latitud Mínima Longitud Mínima [-43,509, 170,23], Latitud Máxima Longitud Máxima [-34,755, 176,963] |
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Cobertura taxonómica
Blue whales
| Especie | Balaenoptera musculus |
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Cobertura temporal
| Fecha Inicial / Fecha Final | 1893-01-21 / 2012-05-03 |
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Métodos de muestreo
Within this region, blue whale sighting and stranding records were compiled to examine the frequency, seasonality and persistence of blue whale presence. Modern (since 1979) records of blue whale sightings within the STB from the following sources of cetacean sighting records were examined: (1) a database curated by the New Zealand Department of Conservation (DOC) in which each sighting is validated; (2) sightings recorded by trained observers aboard transiting ships between New Zealand and overseas ports collated between 1979 and 1999; (3) sightings recorded by scientists and vessel captains at the National Institute of Water and Atmospheric Research Ltd (NIWA) and photo verified by the author (L. Torres unpubl. data); (4) sightings recorded during two recent seismic surveys with on-board marine mammal observers in the STB between 9 May and 22 July 2011, which consisted of 519.7 h of visual surveys (Blue Planet Marine); and (5) anecdotal sightings by a tugboat captain and a DOC ranger in October 2007, which were followed-up with personal conversations.
| Área de Estudio | The South Taranaki Bight (STB) encompasses 55,835 km2 and lies between the north and south islands of New Zealand (38°49'S to 40°53'S, 171°37'E to 175°13'E) |
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Descripción de la metodología paso a paso:
- Additionally, the distribution and density of incidental blue whale sightings from the DOC and Cawthorn datasets were compared between the STB and all of New Zealand. Geographic locations for all these sightings were recorded on-site by the observers. Also investigated were stranding records of blue whales within the STB and all of New Zealand held in the DOC whale stranding database.
Referencias bibliográficas
- Torres, L. (2013). Evidence for an unrecognised blue whale foraging ground in New Zealand. New Zealand Journal of Marine and Freshwater Research, 47(2), 235–248. doi.org/10.1080/00288330.2013.773919
Metadatos adicionales
marine, harvested by iOBIS
| Identificadores alternativos | https://nzobisipt.niwa.co.nz/resource?r=bluewhale_forgaging_stbnz |
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