Cetacean sightings and acoustic detections during a seismic survey off Nicaragua and Costa Rica, November-December 2004
Although the wider Eastern Tropical Pacific has been systematically surveyed during summer/fall, relatively little effort has focused on shelf and slope waters of Nicaragua and Costa Rica. Such data are useful for establishing baseline information and assessing potential changes in cetacean occurren...
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Universidad de Costa Rica
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ftucostaricaojs:oai:portal.ucr.ac.cr:article/25477 2023-07-30T04:02:30+02:00 Cetacean sightings and acoustic detections during a seismic survey off Nicaragua and Costa Rica, November-December 2004 Avistamientos y detecciones acústicas de detáceos durante un sondeo sísmico en aguas fuera de las costas de Nicaragua y Costa Rica, en Noviembre y Diciembre 2004. Holst, Meike Smultea, Mari A. Koski, William R. Sayegh, Alejandro J. Pavan, Gianni Beland, Joseph Goldstein, Howard H. 2017-03-27 application/pdf text/html application/msword https://revistas.ucr.ac.cr/index.php/rbt/article/view/25477 https://doi.org/10.15517/rbt.v65i2.25477 eng eng Universidad de Costa Rica https://revistas.ucr.ac.cr/index.php/rbt/article/view/25477/28871 https://revistas.ucr.ac.cr/index.php/rbt/article/view/25477/28872 https://revistas.ucr.ac.cr/index.php/rbt/article/view/25477/35210 https://revistas.ucr.ac.cr/index.php/rbt/article/view/25477 doi:10.15517/rbt.v65i2.25477 Revista de Biología Tropical; Vol. 65 No. 2 (2017): Volume 65 – Regular number 2 – June 2017; 599-611 Revista de Biología Tropical; Vol. 65 Núm. 2 (2017): Volumen 65 – Número regular 2 – Junio 2017; 599-611 Revista Biología Tropical; Vol. 65 N.º 2 (2017): Volumen 65 – Número regular 2 – Junio 2017; 599-611 2215-2075 0034-7744 10.15517/rbt.v65i2 geophysical survey passive acoustic monitoring marine mammal Eastern Tropical Pacific Central America sondeo geofísico monitoreo acústico pasivo mamífero marino Pacífico Tropical Oriental América Central info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article 2017 ftucostaricaojs https://doi.org/10.15517/rbt.v65i2.2547710.15517/rbt.v65i2 2023-07-11T20:44:40Z Although the wider Eastern Tropical Pacific has been systematically surveyed during summer/fall, relatively little effort has focused on shelf and slope waters of Nicaragua and Costa Rica. Such data are useful for establishing baseline information and assessing potential changes in cetacean occurrence and distribution relative to natural (e.g., El Niño-Southern Oscillation, climate change) and anthropogenic factors. A visual-acoustic survey for cetaceans occurred as part of a monitoring and mitigation program during an academic geophysical seismic study off Nicaragua and Costa Rica, during November-December 2004. Approximately 2 067 cetaceans representing at least seven species were seen in 75 groups during 373 h (3 416 km) of daytime observations from the seismic research vessel (R/V) Maurice Ewing. The humpback whale (Megaptera novaeangliae) and the pantropical spotted dolphin (Stenella attenuata) were the most frequently sighted species (30 % of all groups sighted); both were seen in shelf waters < 100 m deep and in slope waters. The bottlenose dolphin (Tursiops truncatus; 10 % of sightings) was the third most frequently sighted species and was only seen in water > 100 m deep. In addition, sightings were made of spinner dolphins (S. longirostris), short-beaked common dolphins (Delphinus delphis), Risso’s dolphins (Grampus griseus), short-finned pilot whales (Globicephala macrorhynchus), and unidentified dolphins and whales. Unconfirmed sightings of a minke whale (Balaenoptera acutorostrata) and a pod of false killer whales (Pseudorca crassidens) were also recorded. An additional six groups of dolphins (50 % confirmed to species, all pantropical spotted dolphins) were made during 187 h (1 549 km) of observation effort during darkness, two of which were detected within 30 m of the vessel bow using a night vision device. A total of 217 cetacean detections occurred during 633 h of passive acoustic monitoring. A small concentration of 12 humpback whales was seen in eight groups, and two humpbacks were ... Article in Journal/Newspaper Balaenoptera acutorostrata Humpback Whale Megaptera novaeangliae minke whale Portal de revistas académicas de la Universidad de Costa Rica Ewing ENVELOPE(-61.257,-61.257,-69.924,-69.924) Maurice ENVELOPE(-55.817,-55.817,-63.133,-63.133) Pacific Revista de Biología Tropical 65 2 |
institution |
Open Polar |
collection |
Portal de revistas académicas de la Universidad de Costa Rica |
op_collection_id |
ftucostaricaojs |
language |
English |
topic |
geophysical survey passive acoustic monitoring marine mammal Eastern Tropical Pacific Central America sondeo geofísico monitoreo acústico pasivo mamífero marino Pacífico Tropical Oriental América Central |
spellingShingle |
geophysical survey passive acoustic monitoring marine mammal Eastern Tropical Pacific Central America sondeo geofísico monitoreo acústico pasivo mamífero marino Pacífico Tropical Oriental América Central Holst, Meike Smultea, Mari A. Koski, William R. Sayegh, Alejandro J. Pavan, Gianni Beland, Joseph Goldstein, Howard H. Cetacean sightings and acoustic detections during a seismic survey off Nicaragua and Costa Rica, November-December 2004 |
topic_facet |
geophysical survey passive acoustic monitoring marine mammal Eastern Tropical Pacific Central America sondeo geofísico monitoreo acústico pasivo mamífero marino Pacífico Tropical Oriental América Central |
description |
Although the wider Eastern Tropical Pacific has been systematically surveyed during summer/fall, relatively little effort has focused on shelf and slope waters of Nicaragua and Costa Rica. Such data are useful for establishing baseline information and assessing potential changes in cetacean occurrence and distribution relative to natural (e.g., El Niño-Southern Oscillation, climate change) and anthropogenic factors. A visual-acoustic survey for cetaceans occurred as part of a monitoring and mitigation program during an academic geophysical seismic study off Nicaragua and Costa Rica, during November-December 2004. Approximately 2 067 cetaceans representing at least seven species were seen in 75 groups during 373 h (3 416 km) of daytime observations from the seismic research vessel (R/V) Maurice Ewing. The humpback whale (Megaptera novaeangliae) and the pantropical spotted dolphin (Stenella attenuata) were the most frequently sighted species (30 % of all groups sighted); both were seen in shelf waters < 100 m deep and in slope waters. The bottlenose dolphin (Tursiops truncatus; 10 % of sightings) was the third most frequently sighted species and was only seen in water > 100 m deep. In addition, sightings were made of spinner dolphins (S. longirostris), short-beaked common dolphins (Delphinus delphis), Risso’s dolphins (Grampus griseus), short-finned pilot whales (Globicephala macrorhynchus), and unidentified dolphins and whales. Unconfirmed sightings of a minke whale (Balaenoptera acutorostrata) and a pod of false killer whales (Pseudorca crassidens) were also recorded. An additional six groups of dolphins (50 % confirmed to species, all pantropical spotted dolphins) were made during 187 h (1 549 km) of observation effort during darkness, two of which were detected within 30 m of the vessel bow using a night vision device. A total of 217 cetacean detections occurred during 633 h of passive acoustic monitoring. A small concentration of 12 humpback whales was seen in eight groups, and two humpbacks were ... |
format |
Article in Journal/Newspaper |
author |
Holst, Meike Smultea, Mari A. Koski, William R. Sayegh, Alejandro J. Pavan, Gianni Beland, Joseph Goldstein, Howard H. |
author_facet |
Holst, Meike Smultea, Mari A. Koski, William R. Sayegh, Alejandro J. Pavan, Gianni Beland, Joseph Goldstein, Howard H. |
author_sort |
Holst, Meike |
title |
Cetacean sightings and acoustic detections during a seismic survey off Nicaragua and Costa Rica, November-December 2004 |
title_short |
Cetacean sightings and acoustic detections during a seismic survey off Nicaragua and Costa Rica, November-December 2004 |
title_full |
Cetacean sightings and acoustic detections during a seismic survey off Nicaragua and Costa Rica, November-December 2004 |
title_fullStr |
Cetacean sightings and acoustic detections during a seismic survey off Nicaragua and Costa Rica, November-December 2004 |
title_full_unstemmed |
Cetacean sightings and acoustic detections during a seismic survey off Nicaragua and Costa Rica, November-December 2004 |
title_sort |
cetacean sightings and acoustic detections during a seismic survey off nicaragua and costa rica, november-december 2004 |
publisher |
Universidad de Costa Rica |
publishDate |
2017 |
url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/25477 https://doi.org/10.15517/rbt.v65i2.25477 |
long_lat |
ENVELOPE(-61.257,-61.257,-69.924,-69.924) ENVELOPE(-55.817,-55.817,-63.133,-63.133) |
geographic |
Ewing Maurice Pacific |
geographic_facet |
Ewing Maurice Pacific |
genre |
Balaenoptera acutorostrata Humpback Whale Megaptera novaeangliae minke whale |
genre_facet |
Balaenoptera acutorostrata Humpback Whale Megaptera novaeangliae minke whale |
op_source |
Revista de Biología Tropical; Vol. 65 No. 2 (2017): Volume 65 – Regular number 2 – June 2017; 599-611 Revista de Biología Tropical; Vol. 65 Núm. 2 (2017): Volumen 65 – Número regular 2 – Junio 2017; 599-611 Revista Biología Tropical; Vol. 65 N.º 2 (2017): Volumen 65 – Número regular 2 – Junio 2017; 599-611 2215-2075 0034-7744 10.15517/rbt.v65i2 |
op_relation |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/25477/28871 https://revistas.ucr.ac.cr/index.php/rbt/article/view/25477/28872 https://revistas.ucr.ac.cr/index.php/rbt/article/view/25477/35210 https://revistas.ucr.ac.cr/index.php/rbt/article/view/25477 doi:10.15517/rbt.v65i2.25477 |
op_doi |
https://doi.org/10.15517/rbt.v65i2.2547710.15517/rbt.v65i2 |
container_title |
Revista de Biología Tropical |
container_volume |
65 |
container_issue |
2 |
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1772813318943145984 |