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Bioenergetics of European sardine: Simulating environmental influences on population dynamics in the western Mediterranean Sea

AuthorsAlbo Puigserver, Marta ; Pethybridge, H.; Navarro, Joan ; Palomera, Isabel ; Iglesias, Magdalena; Ospina-Álvarez, Andrés ; Coll, Marta
Issue Date6-Mar-2017
PublisherInternational Council for the Exploration of the Sea
CitationInternational symposium : Drivers of dynamics of small pelagic fish resources (2017)
AbstractIn the Mediterranean Sea, European sardine (Sardina pilchardus) is an important species in terms of biomass and catches, although recent declines have been observed, in addition to negative changes in body condition. The objective of this study was to better understand how sardine respond to environmental changes in the western Mediterranean Sea. We implemented a size-structured bioenergetics model based on Dynamic Energy Budget (DEB) theory. DEB models allow the description of the energy allocation in various physiological processes during organisms¿ full life-cycle (growth, maintenance, and maturity/reproduction from egg to adult). To calibrate the model biometric data collected from 2009 to 2015 and energy density estimates from calorimetry analysis were used. Model simulations captured ontogenetic growth patterns and energy storage in spring and summer previous to the spawning season. To examine population dynamics, the DEB model was coupled to an individualbased population model. Scenarios of increasing sea surface temperature (SST) and reduction of food availability (FA) were tested. Stock productivity of sardine was affected through reductions of individual growth rates with decreasing FA, as well as reductions in fecundity rates due to a shorter spawning window as a consequence of an increase of SST in the study area. This information will be vital in assisting the management plans of sardines in the Mediterranean marine ecosystems in the near future
DescriptionInternational Council for the Exploration of the Sea (ICES) - North Pacific Marine Science Organization (PICES) International symposium : Drivers of dynamics of small pelagic fish resources, 6-11 March 2017, Victoria, BC, Canada
Publisher version (URL)https://meetings.pices.int/publications/presentations/2017-Pelagics
Appears in Collections:(ICM) Comunicaciones congresos
(EBD) Comunicaciones congresos
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