Descripción
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.
Registros
Los datos en este recurso de registros biológicos han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 389 registros.
Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.
Versiones
La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.
¿Cómo referenciar?
Los usuarios deben citar este trabajo de la siguiente manera:
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
Derechos
Los usuarios deben respetar los siguientes derechos de uso:
El publicador y propietario de los derechos de este trabajo es ArOBIS Centro Nacional Patagónico. En la medida de lo posible según la ley, el publicador ha renunciado a todos los derechos sobre estos datos y los ha dedicado al Dominio público (CC0 1.0). Los usuarios pueden copiar, modificar, distribuir y utilizar la obra, incluso con fines comerciales, sin restricciones.
Registro GBIF
Este recurso ha sido registrado en GBIF con el siguiente UUID: 79e731ed-fe9b-4d50-93f7-ab1f01636385. ArOBIS Centro Nacional Patagónico publica este recurso y está registrado en GBIF como un publicador de datos avalado por Ocean Biodiversity Information System.
Palabras clave
Occurrence; Sightings; Vessels; Marine Mammals; Pinnipeds; Whales; Dolphins; Surveys; Census; Southwest Atlantic Ocean; Argentine Continental Shelf; Argentine Sea; Observation
Contactos
- Proveedor De Los Metadatos ●
- Originador
- Postdoctoral fellow
- Bv. Almirante Brown 2915
- +54 280 4883184 (int. 1242)
- Originador
- Researcher
- Bv. Almirante Brown 2915
- +54 280 4883184 (int. 1242)
- Originador
- Researcher
- Bernardo Houssay 200
- +54 2901 422310
- Originador
- Researcher
- Bernardo Houssay 200
- +54 2901 422310
- Originador
- Postdoctoral fellow
- Bernardo Houssay 200
- +54 2901 422310
- Originador
- Professional supporting to research
- Bernardo Houssay 200
- +542901422310
- Proveedor De Los Metadatos ●
- Programador ●
- Punto De Contacto
- Professional supporting to research
- Bv. Almirante Brown 2915
- +54 280 4883184 (int. 1202)
- Programador
- Coordinator of the Information Management Unit
- Bv. Almirante Brown 2915
- +54 280 4883184 (int. 1260)
Cobertura geográfica
Argentine continental shelf (Southwest Atlantic Ocean)
| Coordenadas límite | Latitud Mínima Longitud Mínima [-58, -70], Latitud Máxima Longitud Máxima [-37, -55] |
|---|
Cobertura taxonómica
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.
| Familia | Balaenopteridae (Rorquals), Delphinidae (Dolphins) |
|---|---|
| Género | Balaenoptera (Baleen whales) |
| Especie | 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) |
Cobertura temporal
| Fecha Inicial / Fecha Final | 2009-11-29 / 2009-12-16 |
|---|
| Fecha Inicial / Fecha Final | 2012-02-13 / 2012-03-24 |
|---|
| Fecha Inicial / Fecha Final | 2012-03-27 / 2012-04-14 |
|---|
| Fecha Inicial / Fecha Final | 2013-01-25 / 2013-02-19 |
|---|
| Fecha Inicial / Fecha Final | 2014-01-30 / 2014-02-16 |
|---|
| Fecha Inicial / Fecha Final | 2014-02-12 / 2014-03-18 |
|---|
| Fecha Inicial / Fecha Final | 2014-03-29 / 2014-04-04 |
|---|
| Fecha Inicial / Fecha Final | 2014-11-04 / 2014-11-27 |
|---|
| Fecha Inicial / Fecha Final | 2015-02-17 / 2015-02-23 |
|---|
Métodos de muestreo
Data were collected using line transect sampling methodology (Buckland et al. 2001).
| Área de Estudio | 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. |
|---|---|
| Control de Calidad | 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. |
Descripción de la metodología paso a paso:
- 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.
Referencias bibliográficas
- 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.
Metadatos adicionales
marine, harvested by iOBIS
| Identificadores alternativos | 79e731ed-fe9b-4d50-93f7-ab1f01636385 |
|---|---|
| http://arobis.cenpat-conicet.gob.ar:8081/resource?r=arobis-cenpat-cadic-mammalobs |