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Open Access Variation in diet composition of the mudskipper Periophthalmodon septemradiatus from Hau River, Vietnam

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Periophthalmodon septemradiatus (Hamilton, 1822) is a mudskipper of the Mekong Delta. It can be found along estuaries and lower reaches of rivers. We determined diet and feeding ecology of this species by analyzing the contents within the stomachs of 1360 fish samples collected from August 2017 to July 2018. Data analysis suggests that P. septemradiatus is a carnivorous fish. We found six main food item categories: small fish, prawns (Acetes spp.), crabs (Uca spp.), mollusks, ants (Dolichoderus sp.), and detritus. Both males and females at different sizes, seasons, and habitats ingest primarily Dolichoderus sp., secondarily detritus, and rarely other prey. Diet composition is similar between sexes but varies according to fish size, season, and habitat. Dolichoderus sp. and detritus regulate the spatial variation of food composition. Our findings contribute to future artificial cultivation for conservation.
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Affiliations: 1: Department of Biology, School of Education, Can Tho University, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho 900000, Vietnam 2: Bac Lieu University, Bac Lieu City, Bac Lieu 960000, Vietnam 3: Centre for Continuing Education of Soc Trang Province, Soc Trang 950000, Vietnam 4: An Khanh High School, An Khanh Ward, Ninh Kieu District, Can Tho 900000, Vietnam 5: College of Aquaculture and Fisheries, Can Tho University, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho 900000, Vietnam

Appeared or available online: March 28, 2019

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