Description
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.
Enregistrements de données
Les données de cette ressource occurrence ont été publiées sous forme d'une Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant qu'ensemble d'un ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 51 enregistrements.
Cet IPT archive les données et sert donc de dépôt de données. Les données et métadonnées de la ressource sont disponibles pour téléchargement dans la section téléchargements. Le tableau des versions liste les autres versions de chaque ressource rendues disponibles de façon publique et permet de tracer les modifications apportées à la ressource au fil du temps.
Versions
Le tableau ci-dessous n'affiche que les versions publiées de la ressource accessibles publiquement.
Comment citer
Les chercheurs doivent citer cette ressource comme suit:
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
Droits
Les chercheurs doivent respecter la déclaration de droits suivante:
L’éditeur et détenteur des droits de cette ressource est The National Institute of Water and Atmospheric Research (NIWA). Ce travail est sous licence Creative Commons Attribution (CC-BY) 4.0.
Enregistrement GBIF
Cette ressource a été enregistrée sur le portail GBIF, et possède l'UUID GBIF suivante : 1c015688-44a2-4de3-bb88-1995eac2180a. The National Institute of Water and Atmospheric Research (NIWA) publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du GBIF New Zealand.
Mots-clé
Occurrence; Observation
Contacts
- Fournisseur Des Métadonnées ●
- Créateur ●
- Personne De Contact
Couverture géographique
South Taranaki Bight, New Zealand
| Enveloppe géographique | Sud Ouest [-43,509, 170,23], Nord Est [-34,755, 176,963] |
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Couverture taxonomique
Blue whales
| Species | Balaenoptera musculus |
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Couverture temporelle
| Date de début / Date de fin | 1893-01-21 / 2012-05-03 |
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Méthodes d'échantillonnage
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.
| Etendue de l'étude | 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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Description des étapes de la méthode:
- 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.
Citations bibliographiques
- 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
Métadonnées additionnelles
marine, harvested by iOBIS
| Identifiants alternatifs | https://nzobisipt.niwa.co.nz/resource?r=bluewhale_forgaging_stbnz |
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