RT Journal Article
T1 Environment or catches? Assessment of the decline in blackspot seabream (Pagellus bogaraveo) abundance in the Strait of Gibraltar
A1 Sanz Fernández, Víctor
A1 Gutiérrez Estrada, Juan Carlos
A1 Pulido Calvo, Inmaculada
A1 Gil Herrera, Juan
A1 Benchoucha, Said
A1 El Arraf, Sana
AB In this study we carried out an analysis of the relationship between the variation in environmental and oceanographic parameters and the changes in the abundance of blackspot sea bream (Pagellus bogaraveo) in the Strait of Gibraltar between 1983 and 2016. A discrete dynamic model was applied to simulate different scenarios of blackspot sea bream biomass on a monthly time scale. ARIMA models were applied to the simulated biomass time series in order to extract the effect of the fishing component and then correlate the residual series with each of the environmental and oceanic parameter sets. Regardless of the scenario analysed, the error terms provided by the ARIMA models indicated a strong auto-regression dependence on the series and that the fishing component accounted in the worst case scenario for 73% of the variation in sea bream biomass in the Strait of Gibraltar. Throughout the study period, part of the variation not explained by the fishing component was explained in certain years by environmental parameters. These correlations were particularly significant for the water temperature anomaly, salinity anomaly and the NAO index. Our analyses therefore suggest that the main factor responsible for the drastic decline in the abundance of sea bream in the Strait of Gibraltar is over-exploitation of the resource and that environmental conditions had a one-off effect which, depending on the year, favoured or harmed the recovery of the stock.
PB Elsevier
SN 1879-1573 (electrónico)
SN 0924-7963
YR 2019
FD 2019-02
LK https://hdl.handle.net/10272/22808
UL https://hdl.handle.net/10272/22808
LA eng
NO This study was supported by the Biodiversity Foundation of the Spanish Ministry of Agriculture and Fisheries, Food and Environment (Fundación Biodiversidad del Ministerio de Agricultura y Pesca, Alimentación y Medio Ambiente, España) through a research project entitled ‘Herramienta para la gestión pesquera sostenible en distintos escenarios ambientales y climáticos para el área del estrecho de Gibraltar (SimFish)’. Support to activities in the field of terrestrial, marine and coastal biodiversity 2016.
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026