Cetáceos de las aguas costeras del Pacífico norte y sur de Costa Rica (original) (raw)
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Inshore cetaceans from the North and South Pacific coast of Costa Rica. Twenty nine cetacean species occur in Costa Rican waters but extensive research has been conducted only for three species. The latter shows there is a lack of general and local information about these mammals, even when the country, has shown a remarkable growth in whale watching activities. The increasing use of marine resources in coastal areas has also developed the need to determine the occurrence of cetaceans in areas showing high tourist presence, in order to propose sound conservation measures. In this study, environmental variables were determined and subsequently related to the presence of the species recorded, out of 166 sightings, between 2005 and 2006. The species with highest proportion of sightings were Stenella attenuata (68%), followed by Megaptera novaeangliae (13%) and Tursiops truncatus (10%). The presence of spotted dolphins is related to changes in salinity and water transparency, while that of the humpback whale was related to wave height (Beaufort scale) and water temperature. The presence of seven species of cetaceans was confirmed in two coastal areas of the Pacific coast of Costa Rica, from which three are present throughout the year. Environmental variables were found related to the presence of at least two species. Rev. Biol. Trop. 59 (1): 283-290. Epub 2011 March 01.
Areas de congregacion de cetaceos en el Pacifico norte de Costa Rica
La información disponible sobre la distribución de los cetáceos para el Pacífico Norte de Costa Rica actualmente carece de análisis que faciliten la toma de decisiones con el fin de tomar medidas políticas o de manejo para la conservación de los cetáceos costeros. El objetivo de este estudio es identificar áreas de importancia para los cetáceos en el Pacífico Norte, especialmente fuera de la de las áreas protegidas existentes. Se analizaron datos publicados anteriormente sobre avistamientos de cetáceos entre 2004 y 2008, y se complementó esta información con esfuerzo de muestreo durante la estación seca del 2012. Se utilizó un análisis geoestadístico de Kriging ordinario para predecir la continuidad espacial de avistamientos de cetáceos dentro de cuatro áreas de estudio. Con base en este análisis, las áreas de congregación más importantes para los delfines son: Bahía Santa Elena, Parque Nacional Marino Las Baulas and Reserva Natural Cabo Blanco, debido a las altas densidades de grupos de delfines en actividades de alimentación. Las áreas de congregación relevantes para las ballenas jorobadas son: Bahía Santa Elena, Playa Tambor, Golfo de Papagayo and Reserva Natural Cabo Blanco. El estudio identifica las áreas de altas concentraciones de cetáceos en el Pacífico Norte, tanto dentro como fuera de las zonas protegidas. Nuestros resultados indican que algunas de las áreas no protegidas deben ser priorizadas con respecto a la priorización de estrategias de conservación, tales como: Península de Santa Elena, Bahía Culebra, Santa Rosa-Islas Murciélagos, y los alrededores de Punta Pargos y Cabo Blanco. Con base en una primera identificación de las amenazas marinas, se proponen medidas de gestión y políticas para garantizar la conservación de estos sitios de congregación de cetáceos.
. Twenty nine cetacean species occur in Costa Rican waters but extensive research has been conducted only for three species. The latter shows there is a lack of general and local information about these mammals, even when the country, has shown a remarkable growth in whale watching activities. The increasing use of marine resources in coastal areas has also developed the need to determine the occurrence of cetaceans in areas showing high tourist presence, in order to propose sound conservation measures. In this study, environmental variables were determined and subsequently related to the presence of the species recorded, out of 166 sightings, between 2005 and 2006. The species with highest proportion of sightings were Stenella attenuata (68%), followed by Megaptera novaeangliae (13%) and Tursiops truncatus (10%). The presence of spotted dolphins is related to changes in salinity and water transparency, while that of the humpback whale was related to wave height (Beaufort scale) and water temperature. The presence of seven species of cetaceans was confirmed in two coastal areas of the Pacific coast of Costa Rica, from which three are present throughout the year. Environmental variables were found related to the presence of at least two species.
Ciencia & Desarrollo, 2021
Se realizó una revisión del registro de especies de cetáceos en el sur del Perú entre las latitudes 16° y 18° LS. Las fuentes de información fueron artículos publicados, información obtenida por el autor e información compartida por colegas biólogos. El número de especies que contaron con una identificación positiva fue de 16, lo cual corresponde al 50 % de la diversidad de especies registradas en el Perú. La mayoría de especies son odontocetos o cetáceos con dientes con doce especies. Por su parte, las especies de misticetos o cetáceos con barbas alcanzaron a cuatro. Las latitudes 16° y 17° LS son los que albergan a la mayoría de las especies, así como a los grupos grandes de odontocetos. Esta distribución coincide con la extensión de la plataforma continental que se ensancha entre las latitudes 16° y 17° LS por efecto del aporte de los grandes ríos costeros del sur de Arequipa.
Diversidad de cetáceos en el paisaje marino costeros de Golfo Dulce, Península de Osa, Costa Rica
Revista De Biologia Tropical, 2015
Diversity of cetaceans in coastal seascape Golfo Dulce, Osa Peninsula, Costa Rica. Golfo Dulce is a fiord-lilke embayment located in the southern Pacific of Costa Rica, this coastal-marine ecosystem harbors an important wealth in marine biodiversity, including cetaceans. In this study we describe the cetacean commu- nity of Golfo Dulce, in relation to the diversity of habitats constituting the seascape. Sighting data collected in periodic systematic surveys has yielded 943 records (2005-2014≈3 490h≈64 533km), of 12 species of cetaceans. A gradient of cetacean diversity is observed from the inner basin to the transitional-oceanic area at the entrance of the Gulf, with coastal bottlenose dolphin and spotted dolphin dominating the inner basin, and bottlenose dolphins and migratory humpback whales the sill area. Transitional oceanic habitat holds the greatest species diversity dominated by oceanic species, particularly piscivorous delphinids, including the off-shore form of bottlenose d...
Cetáceos presentes en el caribe nororiental colombiano (2004-2012)
Desde el 2004, el Programa de Conservación de Mamíferos Marinos de la Universidad Jorge Tadeo Lozano (ProCMM-UJTL), ha tenido como objetivo principal ampliar el inventario y el conocimiento de algunos de los aspectos ecológicos y etológicos de los cetáceos presentes en el Caribe nororiental colombiano; se consideran los resultados de los 16 estudios adelantados, refiriéndose los avistamientos reportados en sectores de la región de Santa Marta y Baja Guajira, mediante monitoreos desde puntos fijos y transectos lineales, logrando registrar individuos de diez especies –ocho odontocetos y dos misticetos–, y contando con un catálogo para foto-identificación y etogramas de especímenes en cautiverio conteniendo 110 eventos comportamentales dentro de los siete estados predeterminados. Su presencia puede atribuirse a un posible corredor biológico de tránsito en su mayor parte, con algunos focos de alimentación. El ProCMM-UJTL ha cumplido un papel importante de asistencia en necropsias y acompañamiento a diversas entidades en diferentes varamientos.
[Inshore cetaceans from the North and South Pacific coast of Costa Rica]
Revista de biología tropical, 2011
Twenty nine cetacean species occur in Costa Rican waters but extensive research has been conducted only for three species. The latter shows there is a lack of general and local information about these mammals, even when the country, has shown a remarkable growth in whale watching activities. The increasing use of marine resources in coastal areas has also developed the need to determine the occurrence of cetaceans in areas showing high tourist presence, in order to propose sound conservation measures. In this study, environmental variables were determined and subsequently related to the presence of the species recorded, out of 166 sightings, between 2005 and 2006. The species with highest proportion of sightings were Stenella attenuata (68%), followed by Megaptera novaeangliae (13%) and Tursiops truncatus (10%). The presence of spotted dolphins is related to changes in salinity and water transparency, while that of the humpback whale was related to wave height (Beaufort scale) and w...
Revista de Biología Tropical, 2015
Cetacean congregation areas in the North Pacific of Costa Rica: management recommendations. The information on cetacean distribution in the North Pacific of Costa Rica lacks a conservation-oriented analysis. The aim of this study is to identify areas of importance for cetaceans, especially outside the of the existing protected areas. Previously published data on cetacean sightings between 2004 and 2008 were analyzed, and supplemented by survey effort during the dry season of 2012. A Kriging geo-statistical analysis was used to predict the spatial continuity of cetacean sightings within four study areas. The most important congregation areas for dolphins are: Bahía Santa Elena, Parque Nacional Marino Las Baulas and Reserva Natural Cabo Blanco, they have high densities of dolphin feeding groups. Relevant congregation areas for humpback whales are: Bahía Santa Elena, Playa Tambor, Golfo de Papagayo and Reserva Natural Cabo Blanco. We found areas of high cetacean concentration in the North Pacific, both inside and outside protected areas. Some of the non-protected areas should be prioritized for conservation: Bahía Santa Elena, Bahía Culebra and the surrounding areas of Punta
Revista de biologia tropical
Stomatopods and decapods (Crustacea), of the expedition RV Urracá-STRI (2005) on the Pacific coast of central and northern of Costa Rica. During the RV Urracá-STRI (June-July 2005) expedition to the Central and Northern Pacific coast of Costa Rica, 90 species of crustaceans were collected. Seven were identified to family, four to genus and 79 to species. Of the four genera and 79 species (five stomatopods and 74 decapods), 66 have been reported previously for Costa Rican waters, 17 are new samples for the Museo de Zoología, Universidad de Costa Rica collection, 10 are new records for the country, and three represent range extensions.