Sightings of marine mammals carried out during oceanographic surveys in the Argentine continental shelf

Occurrence
Dernière version Publié par ArOBIS Centro Nacional Patagónico le mars 10, 2017 ArOBIS Centro Nacional Patagónico
Date de publication:
10 mars 2017
Licence:
CC0 1.0

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Description

This dataset comprises 389 records of marine mammals collected during nine vessel surveys conducted during 2009-2015, along the Argentine continental shelf. The surveys, carried out between November and April, were designed as line-transect sampling methodology with data collection through visual methods. The database comprises 7 families, 14 genus and 17 marine mammals species were sighted, including records of dolphins, whales and pinnipeds.

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 389 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:

Retana M V, Lewis M N, Dellabianca N A, Raya Rey A, Scioscia G, Torres M (2016): Sightings of marine mammals carried out during oceanographic surveys in the Argentine continental shelf. v1.2. ArOBIS Centro Nacional Patagónico. Dataset/Occurrence. http://arobis.cenpat-conicet.gob.ar:8081/resource?r=arobis-cenpat-cadic-mammalobs&v=1.2

Droits

Les chercheurs doivent respecter la déclaration de droits suivante:

L’éditeur et détenteur des droits de cette ressource est ArOBIS Centro Nacional Patagónico. En vertu de la loi, l'éditeur a abandonné ses droits par rapport à ces données et les a dédié au Domaine Public (CC0 1.0). Les utilisateurs peuvent copier, modifier, distribuer et utiliser ces travaux, incluant des utilisations commerciales, sans aucune restriction.

Enregistrement GBIF

Cette ressource a été enregistrée sur le portail GBIF, et possède l'UUID GBIF suivante : 79e731ed-fe9b-4d50-93f7-ab1f01636385.  ArOBIS Centro Nacional Patagónico publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du Ocean Biodiversity Information System.

Mots-clé

Occurrence; Sightings; Vessels; Marine Mammals; Pinnipeds; Whales; Dolphins; Surveys; Census; Southwest Atlantic Ocean; Argentine Continental Shelf; Argentine Sea; Observation

Contacts

María Valeria Retana
  • Fournisseur Des Métadonnées ●
  • Créateur
  • Postdoctoral fellow
CESIMAR-CENPAT-CONICET
  • Bv. Almirante Brown 2915
U9120ACD Puerto Madryn
Chubut
AR
  • +54 280 4883184 (int. 1242)
Mirtha Noemí Lewis
  • Créateur
  • Researcher
CESIMAR-CENPAT-CONICET
  • Bv. Almirante Brown 2915
U9120ACD Puerto Madryn
Chubut
AR
  • +54 280 4883184 (int. 1242)
Natalia Andrea Dellabianca
  • Créateur
  • Researcher
CADIC-CONICET
  • Bernardo Houssay 200
V9410CAB Ushuaia
Tierra del Fuego
AR
  • +54 2901 422310
Andrea Raya Rey
  • Créateur
  • Researcher
CADIC-CONICET
  • Bernardo Houssay 200
V9410CAB Ushuaia
Tierra del Fuego
AR
  • +54 2901 422310
Gabriela Scioscia
  • Créateur
  • Postdoctoral fellow
CADIC-CONICET
  • Bernardo Houssay 200
V9410CAB Ushuaia
Tierra del Fuego
AR
  • +54 2901 422310
Monica Torres
  • Créateur
  • Professional supporting to research
CADIC-CONICET
  • Bernardo Houssay 200
V9410CAB Ushuaia
Tierra del Fuego
AR
  • +542901422310
María Rosa Marin
  • Fournisseur Des Métadonnées ●
  • Programmeur ●
  • Personne De Contact
  • Professional supporting to research
CESIMAR-CENPAT-CONICET
  • Bv. Almirante Brown 2915
U9120ACD Puerto Madryn
Chubut
AR
  • +54 280 4883184 (int. 1202)
Renato Mazzanti
  • Programmeur
  • Coordinator of the Information Management Unit
CENPAT-CONICET
  • Bv. Almirante Brown 2915
U9120ACD Puerto Madryn
Chubut
AR
  • +54 280 4883184 (int. 1260)

Couverture géographique

Argentine continental shelf (Southwest Atlantic Ocean)

Enveloppe géographique Sud Ouest [-58, -70], Nord Est [-37, -55]

Couverture taxonomique

All individuals were identified to species level, except for some individuals that been identified until family and genus level. The dataset comprises 7 families, 14 genus and 18 species.

Family Balaenopteridae (Rorquals), Delphinidae (Dolphins)
Genus Balaenoptera (Baleen whales)
Species Arctocephalus australis (South American fur seal), Balaenoptera bonaerensis (Antarctic minke whale), Balaenoptera borealis (Sei whale), Cephalorhynchus commersonii (Commerson's dolphin), Delphinus delphis (Short-Beaked common dolphin), Eubalaena australis (Southern right whale), Globicephala melas (Long-finned pilot whale), Lagenorhynchus australis (Peale's dolphin), Lagenorhynchus cruciger (Hourglass dolphin), Lagenorhynchus obscurus (Dusky dolphin), Megaptera novaeangliae (Humpback whale), Mirounga leonina (Southern elephant seal), Orcinus orca (Killer whale), Otaria flavescens (South American sea lion), Phocoena dioptrica (Spectacled Porpoise), Physeter macrocephalus (Sperm whale), Tursiops truncatus (Common bottlenose dolphin)

Couverture temporelle

Date de début / Date de fin 2009-11-29 / 2009-12-16
Date de début / Date de fin 2012-02-13 / 2012-03-24
Date de début / Date de fin 2012-03-27 / 2012-04-14
Date de début / Date de fin 2013-01-25 / 2013-02-19
Date de début / Date de fin 2014-01-30 / 2014-02-16
Date de début / Date de fin 2014-02-12 / 2014-03-18
Date de début / Date de fin 2014-03-29 / 2014-04-04
Date de début / Date de fin 2014-11-04 / 2014-11-27
Date de début / Date de fin 2015-02-17 / 2015-02-23

Méthodes d'échantillonnage

Data were collected using line transect sampling methodology (Buckland et al. 2001).

Etendue de l'étude The Argentine continental shelf extends between the coast of Argentina and the continental slope, with a surface estimated of 1,000,000 km2 and depths less than 100 m in most of its extension (Fig. X). The continental shelf is dominated by two marine currents: the Malvinas Current and Brazil currents. The Malvinas current is a cold and rich in nutrients current that flows north along the continental slope of Argentina up to 38◦ S. The Brazil current is a warm and poor in nutrients current that enters the Argentine Sea from the north, along the slope, and moves south to meet Malvinas current. The collision of these two currents, known as the Brazil/Malvinas Confluence, is a transition area whose location varies seasonally between 30 and 46º S.
Contrôle qualité During the census, all the individuals were identified at the lowest possible taxonomic level (species or genus) using reference guides of marine mammals (Folkens et al. 2002, Shirihai & Jarrett 2002, Shirihai et al. 2006, Bastida & Rodriguez 2010, Jefferson et al. 2011). All the scientific names of marine mammals were validated by matching them against World Register of Marine Species database (WoRMS, http://www.marinespecies.org/). The latitude and longitude of sightings were plotted on a GIS software to detect the outliers, which were corrected following the course of the ship.

Description des étapes de la méthode:

  1. In the Coriolis II mission, one observer, in the roof of the wheelhouse, recorded all the marine mammals in a range of 300 meters in the side of the boat with better visibility using 7x50 binoculars. A screen connected to pilot’s cabin, shown in real time: ship position, ship speed and direction, wind speed and direction, latitude, and longitude. The census was conducted continuously during daylight hours (7-21 hours) when the ship was sailing at a relatively constant velocity of 10 knots. Species, number of individuals, behavior, sea state, ship speed and direction, wind speed and direction were recorded, and each observation was automatically recorded the position (latitude and longitude), date and time of day. In the other censuses, the marine mammals sightings were recorded on a portable handheld computer with integrated GPS (Trimble Juno ST), using the free software CyberTracker (CyberTracker Software (Pty) Ltd Reg. no. 97/01908/07, http://www.cybertracker.co.za). Surveys were conducted daily during daylight hours (~ 12 hrs) at a mean vessel speed of 10 knots. During the surveys, two observers collected the data from both sides of the vessel, through naked eye scans supplemented by use of 7x50 binoculars with internal compass and reticle. A third observer assisted in the scans and recorded observations. Observers switched between the three positions at 2 hour intervals. Data recorded for each sighting included GPS position, date and time, sighting distance, sighting angle, species, group size and composition. Vessel speed, air temperature, wind speed and direction, Beaufort Sea State (BSS), cloud cover and visibility were recorded at the start of each day and updated whenever they changed.

Citations bibliographiques

  1. Buckland ST, Anderson DR, Burnham KP, Laake JL, Borchers DL & Thomas L (2001) Introduction to distance sampling: estimating abundance of biological populations. Oxford University Press, Oxford. 432pp ISBN 978-0-19-850927-8
  2. Bastida R & Rodríguez D (2010) Mamíferos Marinos de la Patagonia y Antártida. Vazquez Mazzini Editores, Buenos Aires. 207pp. ISBN 978-9879-132-203
  3. Jefferson TA, Webber MA & Pitman RL (2011) Marine mammals of the world: a comprehensive guide to their identification. Academic Press.
  4. Shirihai H & Jarrett B (2002) The complete guide to Antarctic wildlife: birds and marine mammals of the Antarctic continent and the Southern Ocean. G. M. Kirwan (Ed.). Princeton University Press.
  5. Folkens P, Reeves A, et al. (2002) Guide to marine mammals of the world. National Audubon Society. 527 pp.
  6. Shirihai H, Jarrett B, & Kirwan GM (2006) Whales, dolphins, and other marine mammals of the world. Princeton University Press.

Métadonnées additionnelles

marine, harvested by iOBIS

Identifiants alternatifs 79e731ed-fe9b-4d50-93f7-ab1f01636385
http://arobis.cenpat-conicet.gob.ar:8081/resource?r=arobis-cenpat-cadic-mammalobs