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Título : A revision of daily egg production estimation methods, with application to Atlanto-Iberian sardine. 1. Daily spawning synchronicity and estimates of egg mortality
Autor : Bernal, Miguel; Stratoudakis, Yorgos; Wood, Simon; Ibaibarriaga, Leire; Uriarte, Andres
Citación : ICES JOURNAL OF MARINE SCIENCE, 2011, 68, 519-527
Resumen : Assumptions of daily spawning synchronicity and estimation of egg mortality for Atlanto-Iberian sardine are revised in the context of daily estimators of egg production. An extensive database of ichthyoplankton surveys from 1985 to 2008, aggregated at different levels, is used, a set of mortality models is derived, and a comparison among them is carried out using standard statistical techniques. Analysis of the database shows Atlanto-Iberian sardine to be a late-evening spawner, in agreement with previous knowledge, but suggests a lengthier daily period of spawning. Comparison among the set of mortality models used suggests that estimates of mortality from single surveys for Atlanto-Iberian sardine are often unreliable, and that the mean estimates obtained after aggregating data from various years are statistically significant, more robust, and in line with existing information gathered from the literature.
Palabras clave : egg production; mortality; Sardina pilchardus; sardine; spawning synchronicity; MULTINOMIAL MODELS; STOCK BIOMASS; PILCHARDUS; ANCHOVY; TEMPERATURE; HABITAT; RATES; FISH; BAY
Fecha de publicación : 2011
Editorial : OXFORD UNIV PRESS
Tipo de documento: Article
Idioma: Inglés
DOI: 10.1093/icesjms/fsr001
URI : http://dspace.azti.es/handle/24689/680
ISSN : 1054-3139
E-ISSN: 1095-9289
Patrocinador: ICES
SGSBSA
WGACEGG
EU
Aparece en las tipos de publicación: Artículos científicos



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