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      Marine mammals of Easter Island (Rapa Nui) and Salas y Gómez Island (Motu Motiro Hiva), Chile: a review and new records Translated title: Mamíferos marinos de la Isla de Pascua (Rapa Nui) e Isla Salas y Gómez (Motu Motiro Hiva), Chile: una revisión y nuevos registros

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          Abstract

          The Chilean oceanic islands Easter Island (Rapa Nui) and Salas y Gómez Island (Motu Motiro Hiva) have received little attention with regards to basic marine mammal investigations. Here we review and update available information on the status of marine mammals in this area from different sources, including published accounts, local interviews and two recent expeditions. We also provide detailed accounts for each confirmed family or species, including historical data from published archaeological studies and whalers' logbooks from the 18th to the 20th centuries. Results indicate that a total of five marine mammal families (Balaenopteridae, Physeteridae, Ziphiidae, Delphinidae and Phocidae) have been confirmed within the study area, representing two mammalian orders (Cetartiodactyla and Carnivora). Within these, twelve species are known to occur: blue whale (Balaenoptera musculus), unidentified minke whale (Balaenoptera bonaerensis or B. acutorostrata), humpback whale (Megaptera novaeangliae), sperm whale (Physeter macrocephalus), Cuvier's beaked whale (Ziphius cavirostris), Blainville's beaked whale (Mesoplodon densirostris), false killer whale (Pseudorca crassidens), unidentified pilot whale (Globicephala sp.), bottlenose dolphin (Tursiops truncatus), common dolphin (Delphinus sp.), southern elephant seal (Mirounga leonina) and leopard seal (Hydrurga leptonyx). We discuss the implications of some of most noteworthy records and make a plea for further studies to improve our knowledge of these top predators in one of the most isolated places in the world.

          Translated abstract

          Las islas oceánicas chilenas Isla de Pascua (Rapa Nui) e Isla Salas y Gómez (Motu Motiro Hiva) han recibido mínima atención en relación con la determinación de la riqueza de especies de mamíferos marinos, su distribución y aspectos básicos de su ecología. En este trabajo nos propusimos realizar una revisión de la información disponible y actualizar registros previos utilizando diferentes fuentes, incluyendo entrevistas locales, antecedentes arqueológicos y bitácoras de balleneros de los siglos XVIII-XX, junto con dos campañas de terreno realizadas recientemente. Los resultados indican que un total de cinco familias de mamíferos marinos (Balaenopteridae, Physeteridae, Ziphiidae, Delphinidae y Phocidae) proviniendo de dos órdenes (Cetartiodactyla y Carnivora) están representadas en el área de estudio. Entre los cetáceos, diez especies se encuentran confirmadas: ballenas azul (Balaenoptera musculus), ballena minke Antártica enana (Balaenoptera bonaerensis/acutorostrata), ballena jorobada (Megaptera novaeangliae), cachalote (Physeter macrocephalus), zifio de Cuvier (Ziphius cavirostris) y mesoplodonte de Blainville (Mesoplodon densirostris), orca falsa (Pseudorca crassidens), calderón de aletas cortas (Globicephala macrorhynchus), tursión (Tursiops truncatus), delfín común de rostro corto (Delphinus delphis), y en Carnivora, dos especies de fócidos: el elefante marino del sur (Mirounga leonina) y la foca leopardo (Hydrurga leptonyx). Se discuten las implicancias de algunos de los registros más relevantes y se enfatiza la necesidad de desarrollar investigaciones sistemáticas con el fin de incrementar el básico conocimiento que se dispone sobre estos depredadores, en una de las zonas más remotas de la Tierra.

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          The distribution of certain whales as shown by the logbook records of American whaleships

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            Variation in the Feeding Success of Sperm Whales: Temporal Scale, Spatial Scale and Relationship to Migrations

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              Systematic consideration of recent toothed whales based on morphology of tympano-periotic bone

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                lajar
                Latin american journal of aquatic research
                Lat. Am. J. Aquat. Res.
                Pontificia Universidad Católica de Valparaíso<BR>Facultad de Recursos Naturales<BR>Escuela de Ciencias del Mar (Valparaíso )
                0718-560X
                October 2014
                : 42
                : 4
                : 743-751
                Affiliations
                [1 ] Universidad Austral de Chile Chile
                [2 ] Universidad Austral de Chile Chile
                [3 ] Instituto Antártico Chileno Chile
                [4 ] Manu Project Chile
                [5 ] Universidad Andres Bello Chile
                Article
                S0718-560X2014000400005
                10.3856/vol42-issue4-fulltext-5
                84388aeb-e6e6-4ae1-9c06-99b73a7056eb

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Chile

                Self URI (journal page): http://www.scielo.cl/scielo.php?script=sci_serial&pid=0718-560X&lng=en
                Categories
                FISHERIES
                MARINE & FRESHWATER BIOLOGY
                OCEANOGRAPHY

                Oceanography & Hydrology,Aquaculture & Fisheries,Ecology
                oceanic islands,cetacean,cetáceo,Pinnipedia,islas oceánicas,cordillera submarina de Nazca,Pacífico suroriental,pinniped,Nazca ridge,southeastern Pacific

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