Spatial and temporal occurrence of fin whales ( Balaenoptera physalus ) and euphausiids ( Nyctiphanes simplex ) in the Ballenas Channel, Gulf of California, Mexico

Fin whales ( Balaenoptera physalus ) are observed year-round in the B allenas Channel and Bahía de los Ángeles region, Gulf of California, where their main food item is the euphausiid Nyctiphanes simplex . This investigation was desi gned under the hypothesis that the spatial and temporal occurrence...

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Detalles Bibliográficos
Autores: Paloma Ladrón-de-Guevara, Gisela Heckel, Bertha E Lavaniegos
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:México
Institución:Centro de Investigación Científica y de Educación Superior de Ensenada
Repositorio:Redalyc-CICESE
OAI Identifier:oai:redalyc.org:48039202004
Acceso en línea:https://www.redalyc.org/articulo.oa?id=48039202004
Access Level:acceso abierto
Palabra clave:Ciencias de la Tierra
fin whale
euphausiids
Gulf of California
Nyctiphanes simplex
Balaenoptera physalus
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spelling Spatial and temporal occurrence of fin whales ( Balaenoptera physalus ) and euphausiids ( Nyctiphanes simplex ) in the Ballenas Channel, Gulf of California, MexicoPaloma Ladrón-de-GuevaraGisela HeckelBertha E LavaniegosCiencias de la Tierrafin whaleeuphausiidsGulf of CaliforniaNyctiphanes simplexBalaenoptera physalusFin whales ( Balaenoptera physalus ) are observed year-round in the B allenas Channel and Bahía de los Ángeles region, Gulf of California, where their main food item is the euphausiid Nyctiphanes simplex . This investigation was desi gned under the hypothesis that the spatial and temporal occurrence of whales and euphausi ids coincides. The aim was to establish the geographic, seasonal, and interannual changes in the abundance of the fin whale and its main prey in the region during 2003 and 2004. F our field trips were carried out per year. Surveys to search for whales and carry out horizontal surface t ows were conducted from small boats . Fin whales and euphausiids were mainly observed off the coast of Baja California and in the southern B allenas Channel. The ir abundance varied significantly from one season to another in both years. The highest rel ative abundance of whales occurre d in July (warm season), followed by June (cold–warm transition period) and March–April (cold season), and th e lowest in October (late warm season). Euphausiid abundance wa s significantly higher in June (cold–warm transition period), followed by July (warm season). There was n o direct correlation between week ly abundances of both species, probably because whale peak abundance occu rred four weeks later than eup hausiid peak abundance. Fin whal e relative abundance was signif icantly higher in 2004 than in 2003 (2.22 and 0.46 whales h –1 , respectively), but euphausiid abundance remained almost the s ame (geometric means 255 and 174 ind/1000 m 3 ). Even though there wa s no weekly correlati on between both spe cies, their geographic di stribution did overlap.Universidad Autónoma de Baja California2015info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdf0185-3880https://www.redalyc.org/articulo.oa?id=48039202004Ciencias Marinas (México) Num.2 Vol.41reponame:Redalyc-CICESEinstname:Centro de Investigación Científica y de Educación Superior de Ensenadainstacron:CICESEenhttp://www.redalyc.org/revista.oa?id=480Ciencias Marinasinfo:eu-repo/semantics/openAccessoai:redalyc.org:480392020042024-08-23T17:34:17Z
dc.title.none.fl_str_mv Spatial and temporal occurrence of fin whales ( Balaenoptera physalus ) and euphausiids ( Nyctiphanes simplex ) in the Ballenas Channel, Gulf of California, Mexico
title Spatial and temporal occurrence of fin whales ( Balaenoptera physalus ) and euphausiids ( Nyctiphanes simplex ) in the Ballenas Channel, Gulf of California, Mexico
spellingShingle Spatial and temporal occurrence of fin whales ( Balaenoptera physalus ) and euphausiids ( Nyctiphanes simplex ) in the Ballenas Channel, Gulf of California, Mexico
Paloma Ladrón-de-Guevara
Ciencias de la Tierra
fin whale
euphausiids
Gulf of California
Nyctiphanes simplex
Balaenoptera physalus
title_short Spatial and temporal occurrence of fin whales ( Balaenoptera physalus ) and euphausiids ( Nyctiphanes simplex ) in the Ballenas Channel, Gulf of California, Mexico
title_full Spatial and temporal occurrence of fin whales ( Balaenoptera physalus ) and euphausiids ( Nyctiphanes simplex ) in the Ballenas Channel, Gulf of California, Mexico
title_fullStr Spatial and temporal occurrence of fin whales ( Balaenoptera physalus ) and euphausiids ( Nyctiphanes simplex ) in the Ballenas Channel, Gulf of California, Mexico
title_full_unstemmed Spatial and temporal occurrence of fin whales ( Balaenoptera physalus ) and euphausiids ( Nyctiphanes simplex ) in the Ballenas Channel, Gulf of California, Mexico
title_sort Spatial and temporal occurrence of fin whales ( Balaenoptera physalus ) and euphausiids ( Nyctiphanes simplex ) in the Ballenas Channel, Gulf of California, Mexico
dc.creator.none.fl_str_mv Paloma Ladrón-de-Guevara
Gisela Heckel
Bertha E Lavaniegos
author Paloma Ladrón-de-Guevara
author_facet Paloma Ladrón-de-Guevara
Gisela Heckel
Bertha E Lavaniegos
author_role author
author2 Gisela Heckel
Bertha E Lavaniegos
author2_role author
author
dc.subject.none.fl_str_mv Ciencias de la Tierra
fin whale
euphausiids
Gulf of California
Nyctiphanes simplex
Balaenoptera physalus
topic Ciencias de la Tierra
fin whale
euphausiids
Gulf of California
Nyctiphanes simplex
Balaenoptera physalus
description Fin whales ( Balaenoptera physalus ) are observed year-round in the B allenas Channel and Bahía de los Ángeles region, Gulf of California, where their main food item is the euphausiid Nyctiphanes simplex . This investigation was desi gned under the hypothesis that the spatial and temporal occurrence of whales and euphausi ids coincides. The aim was to establish the geographic, seasonal, and interannual changes in the abundance of the fin whale and its main prey in the region during 2003 and 2004. F our field trips were carried out per year. Surveys to search for whales and carry out horizontal surface t ows were conducted from small boats . Fin whales and euphausiids were mainly observed off the coast of Baja California and in the southern B allenas Channel. The ir abundance varied significantly from one season to another in both years. The highest rel ative abundance of whales occurre d in July (warm season), followed by June (cold–warm transition period) and March–April (cold season), and th e lowest in October (late warm season). Euphausiid abundance wa s significantly higher in June (cold–warm transition period), followed by July (warm season). There was n o direct correlation between week ly abundances of both species, probably because whale peak abundance occu rred four weeks later than eup hausiid peak abundance. Fin whal e relative abundance was signif icantly higher in 2004 than in 2003 (2.22 and 0.46 whales h –1 , respectively), but euphausiid abundance remained almost the s ame (geometric means 255 and 174 ind/1000 m 3 ). Even though there wa s no weekly correlati on between both spe cies, their geographic di stribution did overlap.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 0185-3880
https://www.redalyc.org/articulo.oa?id=48039202004
identifier_str_mv 0185-3880
url https://www.redalyc.org/articulo.oa?id=48039202004
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.relation.none.fl_str_mv http://www.redalyc.org/revista.oa?id=480
dc.rights.none.fl_str_mv Ciencias Marinas
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Ciencias Marinas
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Autónoma de Baja California
publisher.none.fl_str_mv Universidad Autónoma de Baja California
dc.source.none.fl_str_mv Ciencias Marinas (México) Num.2 Vol.41
reponame:Redalyc-CICESE
instname:Centro de Investigación Científica y de Educación Superior de Ensenada
instacron:CICESE
instname_str Centro de Investigación Científica y de Educación Superior de Ensenada
instacron_str CICESE
institution CICESE
reponame_str Redalyc-CICESE
collection Redalyc-CICESE
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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