Estuarine and marine environmental effects on the Gulf of Cadiz anchovy dynamics
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The Gulf of Cadiz socio-ecosystem is characterized by a focal ecosystem component, the estuary of the Guadalquivir River that has an influence on the marine ecosystem (serves as a nursery area), and at the same time concentrates a great number of sectoral human activities. This nursery role particularly affects the anchovy fishery, which is the most economically and culturally important fishery in the region. As a transition zone between terrestrial and marine environments, estuaries are particularly sensitive to human activities, either developed directly at the aquatic environment or its surroundings. A dam 110 km upstream from the river mouth regulates freshwater input (mainly for agriculture purposes) into the estuary with consequences on turbidity and salinity. Using time- series analysis we (1) quantify the effects that natural (nekton, temperature, winds) and anthropogenic-influenced variables (freshwater discharges, turbidity, salinity) have on the abundance of anchovy larvae and ...
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