Winter Foraging Locations Of Southern Ocean Predators - sub-Antarctic islands 2008/09

Occurrence Observation
Dernière version Publié par Australian Antarctic Data Centre le oct. 9, 2018 Australian Antarctic Data Centre
Date de publication:
9 octobre 2018
Licence:
CC-BY 4.0

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Description

Metadata record for data expected from ASAC Project 2940 See the link below for public details on this project. Public: The extent of Antarctic winter sea-ice influences all aspects of the Antarctic marine food-web. We will use natural variations in inter-annual ice extent, to assess how a key component of that ecosystem, the predators, use the sea ice zone. Core foraging areas and dietary signals for a key Antarctic predator (Antarctic fur seal) will be identified. We will use newly developed, technology to track the animals, and stable isotopes to examine tropic linkages. Combined with satellite-derived sea-ice data, this will lead to the development of a model to predict how changing sea-ice patterns will influence Antarctic marine predator communities. Project Objectives: 1. Use large samples of newly-developed (and tested) animal-borne miniature geolocating light level recorders to population level information on the spatial extent of movements of Antarctic fur seals, thereby quantifying the extent of the use of the winter pack-ice and associated waters by these abundant predators. 2. To quantify how changes in winter ice extent influence the location of core foraging areas for this species. 3. To develop models to investigate how changing ice conditions in the future will influence the movements of this species and to examine a range of climate-change scenarios. Taken from the 2007-2008 Progress Report: No field work was conducted at Macquarie Island in the last 12 months. This was due to the decision by the state government to not issue permits for the work. With the help of our colleagues from BAS we did however manage to deploy 20 GLS light loggers on Antarctic fur seals at South Georgia. Taken from the 2008-2009 Progress Report: Objective 1 has been revised to the study of Antarctic fur seals only (see below). Research is progressing well with 78 animals tracked in 2008 and a further 80 expected in 2009. Objectives 2 and 3 will follow once field data is available for both years (May 2010). Isotopic analysis of blood and whisker samples for the 2008 season will commence in May 2009 once samples have been received. Taken from the 2010-2011 Progress Report: Public summary of the season progress: This study has quantified the response of the Antarctic fur seal (Arctocephalus gazella) to inter-annual variation in oceanographic and winter ice conditions. We have measured the winter spatial foraging patterns of 66 adult females from three circum-Antarctic populations over two years (2008, 2009) during 114 trips to sea, while simultaneously recording in situ water temperature. Stable isotope analysis of fur seal blood and whisker samples indicates that adult females feed on a range of lower (krill) to higher (fish and squid) trophic levels across their winter range. Broad-scale habitat preferences across the range of the species indicate the importance of shelf, ice edge, frontal and oceanic and continental upwelling features in determining winter foraging movements.Quality: Values provided in spatial and temporal coverage are approximate only. Taken from the 2008-2009 Progress Report: Variations to work plan or objectives: Since the original submission of the proposal the project has undergone a change of focus due to logistic constraints imposed by the vertebrate pest eradication plan at Macquarie Island. The revised project objectives now relate to the influences of climate and oceanographic variability including changes in sea-ice extent, on the winter foraging behaviour and habitat use of the Antarctic fur seal, a numerous component of the Antarctic foodweb. Research is being undertaken at three sites with the collaboration of UK, US and South African scientists. The changes necessitate a reduction in the power of predictions pertaining to Southern Ocean trophic models. However the project will provide much needed insight into the winter behaviour of one of Antarctica's most numerous marine predators. Field work: In 2007/8, 78 geolocation light loggers were deployed on adult Antarctic fur seals at three sub-Antarctic/Antarctic sites: South Georgia (n=30), Cape Shirreff (n=18) and Marion island (n=30). Blood and whisker samples were collected for each individual at deployment and on return to facilitate analysis of winter prey consumption. Laboratory activity/analysis: Currently whisker samples are being readied for isotopic analysis.

Enregistrements de données

Les données de cette ressource occurrence ont été publiées sous forme dune Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant quensemble dun ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 66 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 naffiche que les versions publiées de la ressource accessibles publiquement.

Comment citer

Les chercheurs doivent citer cette ressource comme suit:

Hindell, M. and Lea, M.A. (2008, updated 2017) Winter Foraging Locations Of Southern Ocean Predators - sub-Antarctic islands - CAASM Metadata (https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD/AU/ASAC_2940)

Droits

Les chercheurs doivent respecter la déclaration de droits suivante:

L’éditeur et détenteur des droits de cette ressource est Australian Antarctic Data Centre. 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 lUUID GBIF suivante : 6943fd00-8381-4dd8-a39a-3ba9851e92a2.  Australian Antarctic Data Centre publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec lapprobation du Atlas of Living Australia.

Mots-clé

King Penguin; Macaroni Penguin; Antarctic Fur Seals; GLS Light Logger; Iles Kerguelen; Foraging; BIOTA; OCEANS; BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > PENGUINS; BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CARNIVORES > SEALS/SEA LIONS/WALRUSES; BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > FOOD-WEB DYNAMICS; BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS; BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > COASTAL; BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > PELAGIC; CRYOSPHERE > SEA ICE; OCEANS > SEA ICE; BIOSPHERE > ECOSYSTEMS > TERRESTRIAL ECOSYSTEMS > ISLANDS; Occurrence

Données externes

Les données de la ressource sont disponibles dans dautres formats

Point of truth metadata record https://data.aad.gov.au/metadata/records/ASAC_2940 ASCII DIF 9.9

Contacts

MARK HINDELL
  • Personne De Contact
  • INVESTIGATOR
  • ANTARCTIC WILDLIFE R'SRCH UNIT Department of Zoology University of Tasmania GPO BOX 252-05
7001 Hobart
Tasmania
AU
MARY-ANNE LEA
  • Personne De Contact
  • INVESTIGATOR
Institute for Marine and Antarctic Studies University of Tasmania
  • Institute for Marine and Antarctic Studies University of Tasmania Private Bag 129
7001 Hobart
Tasmania
AU
DAVE CONNELL
  • Fournisseur Des Métadonnées
  • DIF AUTHOR
  • Australian Antarctic Division 203 Channel Highway
7050 Kingston
Tasmania
AU
MARK HINDELL
  • Personne De Contact
  • TECHNICAL CONTACT
  • ANTARCTIC WILDLIFE R'SRCH UNIT Department of Zoology University of Tasmania GPO BOX 252-05
7001 Hobart
Tasmania
AU
MARY-ANNE LEA
  • Personne De Contact
  • TECHNICAL CONTACT
Institute for Marine and Antarctic Studies University of Tasmania
  • Institute for Marine and Antarctic Studies University of Tasmania Private Bag 129
7001 Hobart
Tasmania
AU
DATA OFFICER AADC
  • Distributeur
  • DATA CENTER CONTACT
Australian Antarctic Data Centre, Australia
  • Australian Antarctic Division 203 Channel Highway
7050 Kingston
Tasmania
AU

Couverture géographique

OCEAN > SOUTHERN OCEAN OCEAN > ATLANTIC OCEAN > SOUTH ATLANTIC OCEAN > SOUTH GEORGIA ISLAND OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND GEOGRAPHIC REGION > POLAR

Enveloppe géographique Sud Ouest [-70, -180], Nord Est [-45, 180]

Couverture taxonomique

Pas de description disponible

Species Arctocephalus gazella (Antarctic Fur Seals)

Couverture temporelle

Date de début / Date de fin 2007-09-30 / 2011-03-31

Métadonnées additionnelles