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dc.contributor.authorSaavedra, C. (Camilo) es_ES
dc.contributor.authorHowell, D. (Daniel)es_ES
dc.contributor.authorCerviño-López, S. (Santiago) es_ES
dc.contributor.authorPierce, G.J. (Graham John) es_ES
dc.contributor.authorRead, F.L. (Fiona) es_ES
dc.contributor.authorSantos, M.B. (María Begoña) es_ES
dc.date.accessioned2014-09-18T08:41:57Z
dc.date.available2014-09-18T08:41:57Z
dc.date.issued2014es_ES
dc.identifier.urihttp://hdl.handle.net/10508/2234
dc.description.abstractThe short-beaked common dolphin (Delphinus delphis) is the most abundant small cetacean in the north eastern Atlantic and in some regions by-catch is considered to be unsustainable. To help inform conservation measures, population models are needed to explore how the population will react under different scenarios. In order to build a population model, mortality-at-age curves derived from stranding data were constructed, using a Siler model fitted to the total observed dataset. Due to the paucity of data for the youngest age classes, a separate model was fit to a subset of the data that did not include the youngest age classes. Finally, a Heligman-Pollard model was fitted to the second subset of data as well, taking into account the proportion of by-caught dolphins in the sample. The survivorship curves for the Siler models reported that a median of 30% of the females achieve maturity when we used the total observed data set but only the 18% if we remove the youngest ages. The Heligman-Pollard model showed a more realistic shape since by-catch mortality was taken into account. The results of this model show an effective growth of 0.912 which indicate a population decline, likely due to high rates of by-catch.
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Españaes_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/es_ES
dc.titleEstimation of biological parameters for the common dolphin (Delphinus delphis) and its importance on dynamic models. An approximation of the mortality-at-age and the influence of the bycatches_ES
dc.typeconferenceObjectes_ES
dc.identifier.bibliographicCitationICES 2014 Annual Science Conference. (15/09/2014 - 19/09/2014. A Coruña (España)). 2014. ICES CM 2014/J: 11. En: , .*
dc.publisher.centreCentro Oceanográfico de Vigoes_ES
dc.rights.accessRightsopenAccesses_ES
dc.coverage.spatialStudyAtlantic Oceanen_US
dc.coverage.spatialStudyNorth Atlanticen_US
dc.coverage.spatialStudyNortheast Atlanticen_US


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    Atribución-NoComercial-SinDerivadas 3.0 España
    Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España