Abstract

Introducing new alien species into marine ecosystems is one of the most significant drivers of decline in global fisheries productivity, with far-reaching ecological, economic, and social consequences. This research analyzes the effects of non-indigenous fish species on the fisheries of different oceanic regions affected by biodiversity losses due to dealing with native species, habitat modification, and changes in food web dynamics. Species such as lionfish in the Atlantic Ocean, comb jellies in the Black Sea, and Zebra mussels in North America can drastically restructure ecosystems and consequently suppress the populations of commercially valuable fish species. This study aims to demonstrate specific trends and regional susceptibilities to nonnative invasive species through multidisciplinary approaches integrating international fishery databases, ecological surveys, and detailed case studies on biodiversity hotspots and prime fishing zones. The research also defines the consequences of these phenomena, such as climate change, ballast water discharge, unintentional escapes from controlled fisheries, and international commerce, with the rapid dissemination of invasive species. In addition, the study estimates the socio-economic impacts, such as the decline in the number of fish served, increased expenditure, and the deprivation of livelihood for fishermen and responders of the region. Thorough examination of the mitigation frameworks that involve pre-emptive monitoring systems, ecosystem-centered governance frameworks, and policy collaboration on international treaties shows the robust response needed to invasive species control at international borders with maximized efficacy. These strategies are all geared towards active responses bound by intense diplomacy dealing with the regions touched by invasive alien species, establishing feasible and effective countermeasures. The findings highlight that a more socio-ecologically integrated and forward-thinking management approach is required. This work seeks to understand the implications of invasive alien species on the dynamics of marine resources. It provides critical guidance to those responsible for managing fisheries under invasive biological pressures.