Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina

Autores
Crespo, Enrique Alberto; Pedraza, Susana Noemi; Dans, Silvana Laura; Coscarella, Mariano Alberto; Svendsen, Guillermo; Degrati, Mariana; Pedraza, Juan Carlos; Schiavini, Adrian Carlos Miguel
Año de publicación
2015
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
This paper presents information on rate of increase (RI) and mortality rates (MR) for Southern Right Whales (SRW). 1) RI was estimated using GLM procedures based on data of number of individuals obtained in aerial surveys carried out from 1999 to 2015 in Peninsula Valdes (PV). Predictor variables were Year and Julian Day, using also Julian Day2 . Response variables were: a) total number of whales; b) number of calves; c) number of solitary individuals and c) number of mating groups. The total population is increasing at 3.23% annually and the number of calves by 5.54%. RI declined from 6.22% (1999-2007) to 3.23 (1999-2014). Solitary Individual and Mating Groups are no longer growing, 2) the trend of MR was analysed trough time. Data of live and dead calves was obtained for the period 1971-1973, 1981-1982 and 2003-2014. The number of estimated calves born each year was obtained by means of a cumulative function developed from the GLM. It is clear that MR is variable among years. Maximum rates were observed in 2007, 2008 and 2009, being the highest rate in 2008 reaching almost 30% while minimum rates were as low as those observed in 2004 and 2014. The rates observed in the former years show the same pattern of variability with ranging 2- 10%. Finally, the analysis of the information supports that the SRW south Atlantic stock is increasing in the nursing area around PV. Although the number of whales in the surveyed area is increasing, RI is steadily decreasing. Density has been also increasing and whales are expanding their distribution to deeper waters and Golfo San Matías during the last decade. The analysis of the MR since the early 70´s shows an increase. All these facts together are coherent with a density-dependence response.
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Pedraza, Susana Noemi. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Dans, Silvana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Coscarella, Mariano Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Svendsen, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional del Comahue. Instituto de Biología Marina y Pesquera Almirante Storni; Argentina. Universidad Nacional del Comahue. Escuela de Ciencias Marinas; Argentina
Fil: Degrati, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Pedraza, Juan Carlos. Universidad de Buenos Aires. Ciclo Básico Común; Argentina
Fil: Schiavini, Adrian Carlos Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
XXVIII Jornadas Argentinas de Mastozoología
Santa Fe
Argentina
Sociedad Argentina para el Estudio de los Mamiferos
Universidad Nacional del Litoral
Materia
Eubalaena australis
Increase population rate
Patagonia
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/272470
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, ArgentinaRespuestas denso-dependientes en la ballena franca austral Eubalaena australis de la Península de Valdés, ArgentinaCrespo, Enrique AlbertoPedraza, Susana NoemiDans, Silvana LauraCoscarella, Mariano AlbertoSvendsen, GuillermoDegrati, MarianaPedraza, Juan CarlosSchiavini, Adrian Carlos MiguelEubalaena australisIncrease population ratePatagoniahttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1This paper presents information on rate of increase (RI) and mortality rates (MR) for Southern Right Whales (SRW). 1) RI was estimated using GLM procedures based on data of number of individuals obtained in aerial surveys carried out from 1999 to 2015 in Peninsula Valdes (PV). Predictor variables were Year and Julian Day, using also Julian Day2 . Response variables were: a) total number of whales; b) number of calves; c) number of solitary individuals and c) number of mating groups. The total population is increasing at 3.23% annually and the number of calves by 5.54%. RI declined from 6.22% (1999-2007) to 3.23 (1999-2014). Solitary Individual and Mating Groups are no longer growing, 2) the trend of MR was analysed trough time. Data of live and dead calves was obtained for the period 1971-1973, 1981-1982 and 2003-2014. The number of estimated calves born each year was obtained by means of a cumulative function developed from the GLM. It is clear that MR is variable among years. Maximum rates were observed in 2007, 2008 and 2009, being the highest rate in 2008 reaching almost 30% while minimum rates were as low as those observed in 2004 and 2014. The rates observed in the former years show the same pattern of variability with ranging 2- 10%. Finally, the analysis of the information supports that the SRW south Atlantic stock is increasing in the nursing area around PV. Although the number of whales in the surveyed area is increasing, RI is steadily decreasing. Density has been also increasing and whales are expanding their distribution to deeper waters and Golfo San Matías during the last decade. The analysis of the MR since the early 70´s shows an increase. All these facts together are coherent with a density-dependence response.Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Pedraza, Susana Noemi. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Dans, Silvana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Coscarella, Mariano Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Svendsen, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional del Comahue. Instituto de Biología Marina y Pesquera Almirante Storni; Argentina. Universidad Nacional del Comahue. Escuela de Ciencias Marinas; ArgentinaFil: Degrati, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Pedraza, Juan Carlos. Universidad de Buenos Aires. Ciclo Básico Común; ArgentinaFil: Schiavini, Adrian Carlos Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaXXVIII Jornadas Argentinas de MastozoologíaSanta FeArgentinaSociedad Argentina para el Estudio de los MamiferosUniversidad Nacional del LitoralSociedad Argentina para el Estudio de los Mamiferos2015info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectJornadaBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/pdfhttp://hdl.handle.net/11336/272470Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina; XXVIII Jornadas Argentinas de Mastozoología; Santa Fe; Argentina; 2015; 101-101CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sarem.org.ar/xxviii-jam/Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:49:35Zoai:ri.conicet.gov.ar:11336/272470instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:49:36.137CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina
Respuestas denso-dependientes en la ballena franca austral Eubalaena australis de la Península de Valdés, Argentina
title Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina
spellingShingle Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina
Crespo, Enrique Alberto
Eubalaena australis
Increase population rate
Patagonia
title_short Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina
title_full Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina
title_fullStr Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina
title_full_unstemmed Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina
title_sort Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina
dc.creator.none.fl_str_mv Crespo, Enrique Alberto
Pedraza, Susana Noemi
Dans, Silvana Laura
Coscarella, Mariano Alberto
Svendsen, Guillermo
Degrati, Mariana
Pedraza, Juan Carlos
Schiavini, Adrian Carlos Miguel
author Crespo, Enrique Alberto
author_facet Crespo, Enrique Alberto
Pedraza, Susana Noemi
Dans, Silvana Laura
Coscarella, Mariano Alberto
Svendsen, Guillermo
Degrati, Mariana
Pedraza, Juan Carlos
Schiavini, Adrian Carlos Miguel
author_role author
author2 Pedraza, Susana Noemi
Dans, Silvana Laura
Coscarella, Mariano Alberto
Svendsen, Guillermo
Degrati, Mariana
Pedraza, Juan Carlos
Schiavini, Adrian Carlos Miguel
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Eubalaena australis
Increase population rate
Patagonia
topic Eubalaena australis
Increase population rate
Patagonia
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv This paper presents information on rate of increase (RI) and mortality rates (MR) for Southern Right Whales (SRW). 1) RI was estimated using GLM procedures based on data of number of individuals obtained in aerial surveys carried out from 1999 to 2015 in Peninsula Valdes (PV). Predictor variables were Year and Julian Day, using also Julian Day2 . Response variables were: a) total number of whales; b) number of calves; c) number of solitary individuals and c) number of mating groups. The total population is increasing at 3.23% annually and the number of calves by 5.54%. RI declined from 6.22% (1999-2007) to 3.23 (1999-2014). Solitary Individual and Mating Groups are no longer growing, 2) the trend of MR was analysed trough time. Data of live and dead calves was obtained for the period 1971-1973, 1981-1982 and 2003-2014. The number of estimated calves born each year was obtained by means of a cumulative function developed from the GLM. It is clear that MR is variable among years. Maximum rates were observed in 2007, 2008 and 2009, being the highest rate in 2008 reaching almost 30% while minimum rates were as low as those observed in 2004 and 2014. The rates observed in the former years show the same pattern of variability with ranging 2- 10%. Finally, the analysis of the information supports that the SRW south Atlantic stock is increasing in the nursing area around PV. Although the number of whales in the surveyed area is increasing, RI is steadily decreasing. Density has been also increasing and whales are expanding their distribution to deeper waters and Golfo San Matías during the last decade. The analysis of the MR since the early 70´s shows an increase. All these facts together are coherent with a density-dependence response.
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Pedraza, Susana Noemi. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Dans, Silvana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Coscarella, Mariano Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Svendsen, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional del Comahue. Instituto de Biología Marina y Pesquera Almirante Storni; Argentina. Universidad Nacional del Comahue. Escuela de Ciencias Marinas; Argentina
Fil: Degrati, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Pedraza, Juan Carlos. Universidad de Buenos Aires. Ciclo Básico Común; Argentina
Fil: Schiavini, Adrian Carlos Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
XXVIII Jornadas Argentinas de Mastozoología
Santa Fe
Argentina
Sociedad Argentina para el Estudio de los Mamiferos
Universidad Nacional del Litoral
description This paper presents information on rate of increase (RI) and mortality rates (MR) for Southern Right Whales (SRW). 1) RI was estimated using GLM procedures based on data of number of individuals obtained in aerial surveys carried out from 1999 to 2015 in Peninsula Valdes (PV). Predictor variables were Year and Julian Day, using also Julian Day2 . Response variables were: a) total number of whales; b) number of calves; c) number of solitary individuals and c) number of mating groups. The total population is increasing at 3.23% annually and the number of calves by 5.54%. RI declined from 6.22% (1999-2007) to 3.23 (1999-2014). Solitary Individual and Mating Groups are no longer growing, 2) the trend of MR was analysed trough time. Data of live and dead calves was obtained for the period 1971-1973, 1981-1982 and 2003-2014. The number of estimated calves born each year was obtained by means of a cumulative function developed from the GLM. It is clear that MR is variable among years. Maximum rates were observed in 2007, 2008 and 2009, being the highest rate in 2008 reaching almost 30% while minimum rates were as low as those observed in 2004 and 2014. The rates observed in the former years show the same pattern of variability with ranging 2- 10%. Finally, the analysis of the information supports that the SRW south Atlantic stock is increasing in the nursing area around PV. Although the number of whales in the surveyed area is increasing, RI is steadily decreasing. Density has been also increasing and whales are expanding their distribution to deeper waters and Golfo San Matías during the last decade. The analysis of the MR since the early 70´s shows an increase. All these facts together are coherent with a density-dependence response.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Jornada
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/272470
Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina; XXVIII Jornadas Argentinas de Mastozoología; Santa Fe; Argentina; 2015; 101-101
CONICET Digital
CONICET
url http://hdl.handle.net/11336/272470
identifier_str_mv Density dependent responses in Southern Right whales Eubalaena australis at Península Valdés, Argentina; XXVIII Jornadas Argentinas de Mastozoología; Santa Fe; Argentina; 2015; 101-101
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sarem.org.ar/xxviii-jam/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/vnd.openxmlformats-officedocument.wordprocessingml.document
application/pdf
dc.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Sociedad Argentina para el Estudio de los Mamiferos
publisher.none.fl_str_mv Sociedad Argentina para el Estudio de los Mamiferos
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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