Records at sea of juveniles southern elephant seals (Mirounga leonina) from Península Valdés, Argentina

Mirtha Lewis; Claudio Campagna

doi:10.15468/ow2byy

Records at sea of juveniles southern elephant seals (Mirounga leonina) from Península Valdés, Argentina

Citation

Lewis M, Campagna C (2016): Records at sea of juveniles southern elephant seals (Mirounga leonina) from Península Valdés, Argentina. v1.0. ArOBIS Centro Nacional Patagónico. Dataset/Samplingevent. http://arobis.cenpat-conicet.gob.ar:8081/resource?r=mleonina_juv&v=1.0 https://doi.org/10.15468/ow2byy accessed via GBIF.org on 2024-12-14.

Description

This resource contains satellite-tracked locations obtained through Argos system from juveniles of southern elephant seal of Península Valdés, Argentina, during the pelagic phase in the South Atlantic and South Pacific oceans. The dataset encompasses the satellite positions of tags deployed on 6 males and 7 females in 2004 and 2005 winter haul out (July-August), and 18 males and 7 females in 2003, 2005 to 2007 summer haul out (December-January). A filter was applied to delete unrealistic locations.

Sampling Description

Study Extent

Records coverage the positions at sea during the foraging pelagic trip that includes the Patagonian shelf, from the edge of the Patagonian shelf and to the Argentine Basin in the SW Atlantic Ocean, and South Pacific area. Most of the records of each animal are one trip from and to Peninula Valdes. Each location was provided by the Argos System (http://www.cls.fr) and the frequency depended of the behavior of elephant seals at sea and their time surface intervals.

Sampling

Satellite tags (SPOT4/SPOT5, Wildlife Computers, Redmond, Washington, http://www.wildlifecomputers.com) were deployed on juveniles southern elephant seals, during haul out at Península Valdés, Patagonia, Argentina. Tags were configured to send information through Argos System as soon as the animals entered the water.

Quality Control

The behavior of elephant seals at sea and their short surface intervals precludes high accuracy with position fixes. An filter was applied to reject records that would require a travel rate greater than 2.8 m/s (10 km/h).

Method steps

Instruments (Wildlife Computers, Redmond, Washington; instrument description at: http://www.wildlifecomputers.com.) were glued directly on the fur of the head using a 10-min setting epoxy resin (Campagna et al., 1999). Anesthesia protocols to deploy and recover instruments were described in Campagna et al. (1995, 1998, 1999). Tags were configured to send information as soon as the animals entered the water, 24 h per day with repetition rates of 45±6 s in 2003-2004 and 40±6 s in 2005-2006. Locations were received daily via e-mail; Argos provide the estimated accuracy of each location, however, a filter was applied to exclude locations that would require an unrealistic travel rate.

Additional info

marine, harvested by iOBIS

Taxonomic Coverages

The resource includes a unique specie. Scientific Name: Mirounga leonina (Linnaeus, 1758) Common Name (s): Southern Elephant Seal, South Atlantic Elephant-seal, Southern Elephant-seal (English). Eléphant De Mer Austral, Eléphant De Mer Du Sud (French). Elefante Marino Del Sur (Spanish)

Mirounga leonina
common name: Southern elephant seal rank: species

Geographic Coverages

The geographic coverage includes the Patagonian shelf, from the edge of the Patagonian shelf and to the Argentine Basin in the SW Atlantic Ocean, and South Pacific area. Mixed subtropical-subpolar waters characterize five oceanographic regimes in terms of water masses, currents and productivity. 1) Open continental shelf waters of subantarctic origin. 2) Shelf break front a narrow transition region between subpolar (Malvinas/Falkland Current) and shelf waters. 3) Subtropical waters carried by the Brazil Current collide with the cold-fresh subpolar waters of the Malvinas Current. It is characterized by enhanced meridional gradients of sea surface temperature and salinity, and its location has high seasonal and interannual variability. 4) Subpolar characterized by low salinity, cold temperatures and high concentrations of nutrients. 5) Polar with low temperature (<4 °C) and relatively high nutrient concentration waters derived from the Antarctic Circumpolar Current.

Bibliographic Citations

Campagna, C.; Piola, A.R.;Marin, M.R.; Lewis, M.; Fernández, T. 2006. Southern elephant seal trajectories, fronts and eddies in the Brazil/Malvinas Confluence, Deep Sea Research Part I Oceanographic Research Papers 53(12):1907-1924, December 2006. - doi:10.1016/j.dsr.2006.08.015
Campagna, C.; Piola, A.R.; Marin M.R.; Lewis, M.N.; Zajaczkovski, U.; Fernández, T. 2007. Deep divers in shallow seas: southern elephant seals on the Patagonian Shelf. Deep-Sea Research I 54:1792–1814. - doi:10.1016/j.dsr.2007.06.006
Campagna, C.; Fedak, M.; Lewis, M.; Thompson, D.; Trathan, P.; Staniland, I.; Wilson, R.; Marín, M.R.; Falabella, V. 2009. Pinípedos IN Atlas del Mar Patagónico. Especies y Espacios Lugar: Buenos Aires; Año: 2009; p. 202 – 237. Online: http://www.atlas-marpatagonico.org -
Eder, E.; Lewis, M.; Campagna, C.; Koch, P. 2010. Evidence of demersal foraging from stable isotope analysis of juvenile elephant seals from Patagonia. Marine Mammal Science, 26 (2), 430-442. - DOI: 10.1111/j.1748-7692.2009.00347.x
Eder, E.B., Lewis, M.N.; Marín, M.R.; Campagna, C. 2011. On- and off-shelf diving effort of juvenile elephant seals from Península Valdés determined by light loggers. Journal of Mammalogy 92(4): 811-818. - DOI: 10.1644/10-MAMM-A-292.1
Lewis, M.; Campagna, C. 2007. Mamíferos Marinos IN Atlas de Sensibilidad Ambiental de la Costa y el Mar Argentino, D. Boltovskoy (ed.). Secretaría de Ambiente y Desarrollo Sustentable de la Nación. Buenos Aires. -
Campanga, C.; Lewis, M. 2008. Mamíferos Marinos IN Foro para la Conservación del Mar Patagónico y Áreas de Influencia. 2008. Estado de conservación del Mar Patagónico y áreas de influencia. Puerto Madryn, Argentina, Edición del Foro. Online: www.marpatagonico.org, http://www.marpatagonico.org/libro/articulo.php?id=lewis-campagna-mamiferos-marinos -

Contacts

Mirtha Lewis
originator
position: Researcher
CESIMAR-CENPAT-CONICET
Bv. Almirante Brown 2915
Puerto Madryn
U9120ACD
Chubut
AR
Telephone: +54 280 4883184 (int. 1242)
email: mirtha@cenpat-conicet.gob.ar
homepage: http://www.cenpat-conicet.gob.ar/

Claudio Campagna
originator
position: Researcher
Wildlife Conservation Society
email: ccampagna@wcs.org

Mirtha Lewis
metadata author
position: Researcher
CESIMAR-CENPAT-CONICET
Bv. Almirante Brown 2915
Puerto Madryn
U9120ACD
Chubut
AR
Telephone: +54 280 4883184 (int. 1242)
email: mirtha@cenpat-conicet.gob.ar
homepage: http://www.cenpat-conicet.gob.ar/

María Rosa Marin
metadata author
position: Professional supporting to research
CESIMAR-CENPAT-CONICET
Bv. Almirante Brown 2915
Puerto Madryn
U9120ACD
Chubut
AR
Telephone: +54 280 4883184 (int. 1202)
email: marin@cenpat-conicet.gob.ar
homepage: http://www.cenpat-conicet.gob.ar/

Renato Mazzanti
programmer
position: Coordinator of the Information Management Unit
CENPAT-CONICET
Bv. Almirante Brown 2915
Puerto Madryn
U9120ACD
Chubut
AR
Telephone: +54 280 4883184 (int. 1260)
email: renato@cenpat-conicet.gob.ar

María Rosa Marin
administrative point of contact
position: Professional supporting to research
CESIMAR-CENPAT-CONICET
Bv. Almirante Brown 2915
Puerto Madryn
U9120ACD
Chubut
AR
Telephone: +54 280 4883184 (int. 1202)
email: marin@cenpat-conicet.gob.ar
homepage: http://www.cenpat-conicet.gob.ar/