Land-use and land-cover affect inland fish catch in two rivers of Central Africa

作     者：Leandro Castello Gifty Anane-Taabeah Attu Anthony Aliebe Nelly Ornelle Onana Ateba Sandrine Jueya Felipe Carvalho Amy Ickowitz Emmanuel A.Frimpong 

作者机构：Department of Fish&Wildlife ConservationVirginia Polytechnic Institute and State UniversityBlacksburgVAUnited States Department of Fisheries and Watershed ManagementKwame Nkrumah University of Science and TechnologyKumasiGhana Farmerline LimitedKumasiGhana Department of Parasitology and EcologyUniversity of Yaounde 1YaoundeCameroon Faculty of SciencesUniversity of NgaoundereNgaoundereCameroon Center for International Forestry ResearchBogorIndonesia 

出 版 物：《Water Biology and Security》 (水生生物与安全（英文）)

年 卷 期：2022年第1卷第4期

页      面：51-60页

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1002[医学-临床医学] 0908[农学-水产] 100214[医学-肿瘤学] 10[医学] 

基　　金：Funding for this study came from United States Agency for International Development's Forestry and Biodiversity Office(USAID-FAB) Directorate General for International Cooperation and Development(EVDEVCO) 

主　　题：Agriculture Diet Fish traits Food security LULC 

摘      要：Land-cover change can affect inland fisheries,which underpin food security of millions of people *** of forests from very large floodplains has been found to decrease fish catch via loss of feeding and nursery habitat for ***,it is unknown if similar effects occur in smaller rivers with limited floodplain *** is also known about the mechanisms by which land-cover changes affect inland fish ***,we assessed land-use and land-cover(LULC)effects on fish catch,diet,and condition at sites in two medium-sized rivers of Cameroon,in Central *** found that LULC explained 30%of the variation in fish catch,with the catch of five species being positively,and of two species being negatively,related to floodplain *** niche breadth of fish diets was higher in the river surrounded by forests than in the river surrounded by agricultural ***,contrary to expectations,condition of the fish,as indicated by occurrence of diseases or deformities,eroded fins,lesions or tumors,was not related to *** results support the notions that floodplain forests support fish populations in rivers with limited floodplain areas in ways similar to that of rivers with large floodplains,and that LULC affects fish populations via changes in fish diets and instream habitat features(i.e.,riparian canopy closure,water clarity,substrate heterogeneity,and habitat volume).These effects imply that prevailing changes in LULC threaten the food and livelihood security services provided by inland fisheries,highlighting the importance of policies that maintain native vegetation along riverbanks and in floodplain areas.