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Fish and Fishery: An Overview of Fish Farming and Aquaculture, Pollution, Microplastics and Habitat Degradation
Summary
This review pulls together existing research on how pollution, microplastics, and habitat destruction are harming fish populations worldwide, and how these tiny plastic particles can build up in fish tissue as they move up the food chain. Since fish are a major food source for billions of people, contamination like this matters because it could affect the safety and nutritional quality of seafood on your plate. The paper also outlines practical fixes—like cleaner farming practices and habitat restoration—that could help protect both fish and the people who depend on them for food.
Aquatic ecosystems are increasingly threatened by multiple anthropogenic stressors, among which pollution, microplastic contamination, and habitat degradation are of critical concern for fisheries and aquaculture sustainability. This chapter provides a comprehensive synthesis of the sources, distribution, and ecological consequences of these stressors in freshwater and marine environments. Special emphasis is placed on microplastics as emerging contaminants, detailing their origin, physicochemical characteristics, trophic transfer, and bioaccumulation in fish species. The chapter further explores how conventional pollutants such as heavy metals, pesticides, and industrial effluents interact synergistically with microplastics, exacerbating toxicity and ecological risks. Habitat degradation, including mangrove destruction, coral reef decline, eutrophication, and sedimentation, is discussed in relation to its impact on fish diversity, breeding grounds, and aquaculture productivity. The implications for fish health, growth performance, reproductive success, and food safety are critically evaluated. Finally, the chapter highlights mitigation strategies, including sustainable aquaculture practices, pollution control measures, habitat restoration, and policy interventions, providing a roadmap for enhancing ecosystem resilience and ensuring long-term fishery sustainability.