Download RTF - ArOBIS Centro Nacional Patagónico

Sightings of marine mammals carried out during oceanographic surveys in
the Argentine continental shelf
María Valeria Retana1, Mirtha Noemí Lewis1, Natalia Andrea Dellabianca2, Andrea Raya
Rey2, Gabriela Scioscia2, Monica Torres2, María Rosa Marin1, Renato Mazzanti3
1 CESIMAR-CENPAT-CONICET, Bv. Almirante Brown 2915, U9120ACD, Puerto
Madryn, Argentina; 2 CADIC-CONICET, Bernardo Houssay 200, V9410CAB, Ushuaia,
Argentina; 3 CENPAT-CONICET, Bv. Almirante Brown 2915, U9120ACD, Puerto Madryn,
Argentina
Corresponding author(s): María Valeria Retana ([email protected])Mirtha
Noemí
Lewis
([email protected])Natalia
Andrea
Dellabianca
([email protected])Andrea Raya Rey ([email protected])Gabriela
Scioscia ([email protected])Monica Torres ([email protected]), María Rosa
Marin ([email protected])
Received {date}; Revised {date}; Accepted {date}; Published {date}
Citation: Combination of authors, year of data paper publication (in parentheses), Title,
Journal Name, Volume, Issue number (in parentheses), and doi of the data paper.
Resource Citation
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
Abstract
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.
Keywords: Occurrence, Sightings, Vessels, Marine Mammals, Pinnipeds, Whales, Dolphins,
Surveys, Census, Southwest Atlantic Ocean, Argentine Continental Shelf, Argentine Sea,
Observation
General description
Additional information: marine, harvested by iOBIS
Data published through GBIF:
http://arobis.cenpat-conicet.gob.ar:8081/resource?r=arobis-cenpat-cadic-mammalobs
Taxonomic coverage
General taxonomic coverage description: 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.
Taxonomic ranks
Family: Balaenopteridae, Delphinidae
Genus: Balaenoptera
Species: Arctocephalus australis, Balaenoptera bonaerensis, Balaenoptera borealis,
Cephalorhynchus commersonii, Delphinus delphis, Eubalaena australis, Globicephala melas,
Lagenorhynchus australis, Lagenorhynchus cruciger, Lagenorhynchus obscurus, Megaptera
novaeangliae, Mirounga leonina, Orcinus orca, Otaria flavescens, Phocoena dioptrica,
Physeter macrocephalus, Tursiops truncatus
Common names: South American fur seal, Antarctic minke whale, Sei whale, Commerson's
dolphin, Short-Beaked common dolphin, Southern right whale, Long-finned pilot whale,
Peale's dolphin, Hourglass dolphin, Dusky dolphin, Humpback whale, Southern elephant
seal, Killer whale, South American sea lion, Spectacled Porpoise, Sperm whale, Common
bottlenose dolphin, Baleen whales, Rorquals, Dolphins
Spatial coverage
General spatial coverage: Argentine continental shelf (Southwest Atlantic Ocean)
Coordinates: 58°0'0''S and 37°0'0''S Latitude; 70°0'0''W and 55°0'0''W Longitude
Temporal coverage: November 29, 2009 - December 16, 2009
Temporal coverage: February 13, 2012 - March 24, 2012
Temporal coverage: March 27, 2012 - April 14, 2012
Temporal coverage: January 25, 2013 - February 19, 2013
Temporal coverage: January 30, 2014 - February 16, 2014
Temporal coverage: February 12, 2014 - March 18, 2014
Temporal coverage: March 29, 2014 - April 4, 2014
Temporal coverage: November 4, 2014 - November 27, 2014
Temporal coverage: February 17, 2015 - February 23, 2015
Methods
Method step description: 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.
Study extent description: 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.
Sampling description: Data were collected using line transect sampling methodology
(Buckland et al. 2001).
Quality control description: 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.
Datasets
Dataset description
Object name: Darwin Core Archive Sightings of marine mammals carried out during
oceanographic surveys in the Argentine continental shelf
Character encoding: UTF-8
Format name: Darwin Core Archive format
Format version: 1.0
Distribution:
http://arobis.cenpat-conicet.gob.ar:8081/archive.do?r=arobis-cenpat-cadic-mammalobs
Publication date of data: 2017-03-10
Language: English
Licences of use: To the extent possible under law, the publisher has waived all rights to these
data
and
has
dedicated
them
to
the
<a
href="http://creativecommons.org/publicdomain/zero/1.0/legalcode">Public Domain (CC0
1.0)</a>. Users may copy, modify, distribute and use the work, including for commercial
purposes, without restriction.
Metadata language: English
Date of metadata creation: 2016-04-06
Hierarchy level: Dataset
References
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
Bastida R & Rodríguez D (2010) Mamíferos Marinos de la Patagonia y Antártida. Vazquez
Mazzini Editores, Buenos Aires. 207pp. ISBN 978-9879-132-203
Jefferson TA, Webber MA & Pitman RL (2011) Marine mammals of the world: a
comprehensive guide to their identification. Academic Press.
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.
Folkens P, Reeves A, et al. (2002) Guide to marine mammals of the world. National
Audubon Society. 527 pp.
Shirihai H, Jarrett B, & Kirwan GM (2006) Whales, dolphins, and other marine mammals of
the world. Princeton University Press.