Author(s)

Jing Yu^1*, Qiwei Hu^1,2, Huarong Yuan^1*, Fei Tong¹, Pimao Chen¹, Jiangmei Mao^1,2

¹South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Key Laboratory of Fishery Ecology and Environment, Guangdong Province/Scientific Observing and Experimental Station of South China Sea Fishery Resources and Environment, Ministry of Agriculture/Key Laboratory of Marine Ranching Technology, CAFS, Guangzhou, China.
²College of Marine Science, Shanghai Ocean University, Shanghai, China.

In order to assess effects of Summer Fishing Moratorium (SFM) in Daya Bay, variations in stock density, fish diversity, fish species composition, fish body length and weight, and bio-environments during the pre-SFM (May in 2015) and post-SFM (August in 2015) in Daya Bay were analyzed, based on trawl survey data. Results showed that the average stock density in the post-SFM was 5.65 times of that in the pre-SFM, and the average species numbers in the post-SFM was 1.76 times of that in the pre-SFM. Analysis of fish body length and weight indicated that fish grew faster during the SFM, and body weight was more uniform in the post-SFM. In the post-SFM, the Shannon-Wiener diversity index and Pielou evenness index increased by 0.36 and 0.14, respectively, indicating that the fish biodiversity and community structure improved. SFM alleviated fishing intensity, recovered and conserved coastal fish resource. In order to improve efficiency and impacts of SFM and to promote sustainable development of coastal fish resource, prolonging the time of SFM, reducing the number of coastal fishing boats and enforcing the conservation of fish resources were suggested.

Summer Fishing Moratorium, Fishery Resources, Variation, Daya Bay

Yu, J. , Hu, Q. , Yuan, H. , Tong, F. , Chen, P. and Mao, J. (2017) Effects Assessment of Summer Fishing Moratorium in Daya Bay in the Northern South China Sea. Journal of Geoscience and Environment Protection, 5, 96-108. doi: 10.4236/gep.2017.57010.