Subhabitat selection and differences of diet composition for Acanthogobius ommaturus in the Dongtan wetland of the Yangtze estuary, China.

doi:10.13287/j.1001-9332.201803.033

Chinese Journal of Applied Ecology ›› 2018, Vol. 29 ›› Issue (3): 945-952.doi: 10.13287/j.1001-9332.201803.033

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Subhabitat selection and differences of diet composition for Acanthogobius ommaturus in the Dongtan wetland of the Yangtze estuary, China.

ZHANG Heng^1,2, YE Jin-yu^1,2, ZHANG Ying-ying^1,2, JIN Shao-fei^3,4, ZHANG Sheng-mao^1*

¹Ministry of Agriculture Key Laboratory of Oceanic and Polar Fisheries, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China;
²College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;
³College of Marine Sciences, Minjiang University, Fuzhou 350108, China;
⁴Institute of Oceanography, Minjiang University, Fuzhou 350108, China

Received:2017-07-27 Online:2018-03-18 Published:2018-03-18
Contact: * E-mail: 13127961290@126.com.
Supported by:
This paper was supported by Shanghai Natural Science Fund (15ZR1450000), Special Funds of Basic Research of Central Public Welfare Institute (2015M07) and the National Natural Science Fundation of China (31170508)

Abstract

Abstract: We examined the temporal and spatial variation in the abundance and diet composition of Acanthogobius ommaturus at three subhabitats (mudflat, salt marsh, and creek) of the Dongtan wetland of Yangtze Estuary with monthly field samplings from July 2015 to June 2016. The results showed that the samples of A. ommaturus were mainly composed of young individuals in the period of June-November, whereas no fish was collected during the other months. Most of the samples were collected in July (71) and only three individuals was collected in November. Most of the samples were collected (93) in creek, which was 5.2 and 4.9 times of those in mudflat and salt marsh, respectively. The diet of the A. ommaturus included 10 taxa and 30 prey species, dominated by shrimps. In the taxonomic level, the dominant preys were the Exopalaemon annandalei or other Exopalaemon sp. of shrimps, the Sesarma sp. of crabs and Micromecta quadriseta of insects. Compared with other taxonomic groups, the fish prey had relatively higher mass percentage but lower abundance percentage. The prey composition of A. ommaturus differed among subhabitats. The feeding level of A. ommaturus increased gradually from July to November and reached 3.0 in late autumn. The differences in the abundances of A. ommaturus among subhabitats would be induced by prey composition.

ZHANG Heng, YE Jin-yu, ZHANG Ying-ying, JIN Shao-fei, ZHANG Sheng-mao. Subhabitat selection and differences of diet composition for Acanthogobius ommaturus in the Dongtan wetland of the Yangtze estuary, China.[J]. Chinese Journal of Applied Ecology, 2018, 29(3): 945-952.

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Subhabitat selection and differences of diet composition for Acanthogobius ommaturus in the Dongtan wetland of the Yangtze estuary, China.

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