Modelling ecosystem dynamics to assess the effect of coastal fisheries on cetacean species

摘要: Abstract The expansion of fisheries and its increased efficiency are causing severe detrimental impacts on marine species ecosystems, that can be categorised into operational ecological effects. While directly caused by fishing activities have been extensively documented, it is difficult to set an empirical link between changes in predator biomass abundance. Therefore, exploring the functioning ecosystems as a whole, interactions different within them impact human activities, key understanding effects top predators develop effective conservation measures, while ensuring more sustainable exploitation resources. For instance, mass balance models, such Ecopath with Ecosim, proven useful tool holistic management strategies. In this study, Ecosim was used investigate temporal dynamics Rias Baixas shelf ecosystem (North-West Spain) 2005 2017. Additionally, nine 30-year forward projecting simulations covering period 2018–2047 were developed examine differing strategies common dolphins (Delphinus delphis), bottlenose (Tursiops truncatus) harbour porpoises (Phocoena phocoena). Results from these models suggest when intense increases poses major threat area, reducing variety their available prey potentially enhancing competition amongst them. study highlights applicability cetacean measures despite small spatial scale, provides general framework assess larger impacted areas.