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Updated: Jun 10, 2026

07:41
Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
Published on: July 30, 2019
Inland capture fisheries
Robin L Welcomme1, Ian G Cowx, David Coates
1Division of Biology, Imperial College London, Silwood Park, Ascot SL5 7PY, UK. welcomme@btinternet.com
Summary
Inland fisheries, vital for many communities, face complex challenges from management and external factors like land use and climate change. These fisheries are most at risk in Asia and Africa due to intense exploitation.
Area of Science:
- Fisheries Science
- Aquatic Ecology
- Environmental Management
Background:
- Inland capture fisheries yield over 10 million tonnes annually, with actual catches likely higher.
- These fisheries are complex ecosystems supporting diverse species and communities with varied livelihoods.
- Numerous internal and external drivers, including management practices, land use, water demand, and climate change, impact inland fisheries.
Purpose of the Study:
- To highlight the complexity and importance of inland fisheries.
- To identify key drivers affecting inland fisheries and their environments.
- To assess the future outlook and risks for inland fisheries across different continents.
Main Methods:
- Review of reported fisheries data and existing literature.
- Analysis of ecological and socio-economic factors influencing fisheries.
- Comparative assessment of regional variations in exploitation and risk.
Main Results:
- Inland fisheries are significantly impacted by factors such as land-use practices, water demand, and climate change.
- Ecosystem functions in rivers, lakes, reservoirs, and wetlands are differentially affected by these drivers.
- Asia and Africa face the highest risks due to intense exploitation, while South/Central America are less exploited, and temperate zones focus on recreation.
Conclusions:
- Inland fisheries are under considerable pressure globally, with significant regional disparities in exploitation and risk.
- Sustainable management requires addressing both internal fishery practices and external environmental and socio-economic influences.
- Climate change acts as a threat multiplier, exacerbating existing challenges for inland fisheries worldwide.
