Influence of timing of fishing on trophic levels and diets of typical fish and invertebrate species in the Bohai Strait over a single year based on carbon, and nitrogen isotope analysis

doi:10.1016/j.ecolind.2016.06.029

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	Influence of timing of fishing on trophic levels and diets of typical fish and invertebrate species in the Bohai Strait over a single year based on carbon, and nitrogen isotope analysis
	Qu, Pei 1,2; Pang, Min 1; Wang, Qixiang 3; Li, Zhao 4; Liu, Chengyue 2; Zhang, Zhipeng 2; Tang, Xuexi 2,5
刊名	ECOLOGICAL INDICATORS
	2016-11
卷号	70 页码:348-356
关键词	Bohai Strait Fishing periods Predation Stable isotopes Trophic levels
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2016.06.029
英文摘要	Fishing is the most widespread human exploitation of marine resources, which has an annual cyclical influence on aquatic species in Chinese offshore waters. This study used carbon and nitrogen isotopic ratios as tracers to reveal the changes in trophic level and dietary composition of offshore organisms during four cruises in March, June, August and November 2014. The results indicated that the trophic levels of fishes declined during two fishing periods, from March (average trophic level = 3.36) to June (3.01), and from August (2.99) to November (2.57), while most invertebrates did not show this trend. The self-restoring ability of this ecosystem was reflected in the trophic level changes after the closed fishing season (from June 1 to September 1). The trophic levels of fishes remained stable, and some species even recovered such as Enchelyopus elongates (trophic level increased from 2.84 in June to 2.86 in August), Cryptocentrus filifer (from 3.10 to 3.12), and Ernogrammus hexagrammus (from 2.91 to 2.96). According to the trophic results, we selected the invertebrates Octopus minor and Asterias arnurensis from the top trophic levels for dietary composition analysis. The composition of their diets changed significantly after fishing periods, and the proportions of some smaller and "non-commercial" species increased, such as No toacmea schrenckii and Chlorostoma rustica. After the closed fishing season, the larger and "commercial" species contributed a greater proportion to their diet composition. These results indicated that the closed fishing season should be prolonged to give the ecosystem enough time to restore itself and further halt the trend of this fishery towards environment deterioration. (C) 2016 Elsevier Ltd. All rights reserved.
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000388785200031
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3329]
专题	业务部门_海洋生态研究中心
作者单位	1.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China; 2.Ocean Univ China, Coll Marine Life, Qingdao 266003, Peoples R China; 3.Marine Biol Inst Shandong Prov, Qingdao 266104, Peoples R China; 4.China Natl Environm Monitoring Ctr, Beijing 100029, Peoples R China; 5.5 Yushan Rd, Qingdao 266003, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Qu, Pei,Pang, Min,Wang, Qixiang,et al. Influence of timing of fishing on trophic levels and diets of typical fish and invertebrate species in the Bohai Strait over a single year based on carbon, and nitrogen isotope analysis[J]. ECOLOGICAL INDICATORS,2016,70:348-356.
APA	Qu, Pei.,Pang, Min.,Wang, Qixiang.,Li, Zhao.,Liu, Chengyue.,...&Tang, Xuexi.(2016).Influence of timing of fishing on trophic levels and diets of typical fish and invertebrate species in the Bohai Strait over a single year based on carbon, and nitrogen isotope analysis.ECOLOGICAL INDICATORS,70,348-356.
MLA	Qu, Pei,et al."Influence of timing of fishing on trophic levels and diets of typical fish and invertebrate species in the Bohai Strait over a single year based on carbon, and nitrogen isotope analysis".ECOLOGICAL INDICATORS 70(2016):348-356.