Stable isotopic and stomach content analyses reveal changes in the trophic level and feeding habit of large-head hairtail (Trichiurus lepturus) in the northern South China Sea
文献类型： 外文期刊
作者： Wang, Kaili 1 ; Li, Jiajun 1 ; Xu, Shannan 1 ; Gong, Yuyan 1 ; Xu, Youwei 1 ; Cai, Yancong 1 ; Yang, Yutao 4 ; Zhang, Kui 1 ; Chen, Zuozhi 1 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China
2.Minist Agr & Rural Affairs, Key Laborary Sustainable Utilizat Open Sea Fishery, Guangzhou 510300, Peoples R China
3.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
4.Shanghai Ocean Univ, Coll Marine Sci, Shanghai 201306, Peoples R China
5.231 Xingang Rd West, Guangzhou 510300, Peoples R China
关键词： Ribbonfish; Trophic level decreases; Water depth; Diet shift
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）
ISSN： 0048-9697
年卷期： 2023 年 896 卷
页码：
收录情况： SCI
摘要： The feeding habit of large-head hairtail (Trichiurus lepturus) in the northern South China Sea was investigated through isotopic and stomach content analyses. The isotopic features of the hairtail at the same body size differed among regions, with the fish in coastal waters presenting higher delta N-15 and delta C-13 values compared to those in the open sea, indicating different trophic levels (TL), food habits, and isotopic baselines. According to the partial correlation of water depth with delta N-15 values, the sampling stations were divided into three regions based on the depth of water: coastal (20-40 m), near coastal (60-80 m), and open sea (100-200 m) regions. In the coastal region, the hairtail from stations affected by the Pearl River plume exhibited lower delta N-15 and delta C-13 values. The stomach content analysis indicated different feeding habits of the hairtail from different regions. The hairtail in the coastal and near coastal waters fed more on fish and less on crustaceans compared to the hairtail in the open sea. The relationship between delta N-15 and fish size exhibited two contrary patterns. First, the delta N-15 values increased with increasing preanal length in the hairtail sampled from the water depth of 30-40min section F (in fish with preanal length < 200 mm) and those samples from the water depth of 100-200 m. This finding reflected an ontogenetic shift in diet and TL. However, the delta N-15 values tended to decrease with the increasing preanal length of the hairtail samples collected from the water depth of 30-40min section F (fish with a preanal length of similar to 200-300mm). These findings suggested that under the conditions of insufficient availability of high-quality prey, the larger hairtail fed more on low-TL prey to compensate for the increase energy demand, arising due to growth, which led to the observed decrease in delta N-15 values.
- 相关文献
作者其他论文 更多>>
-
Simulating Habitat Suitability Changes of Threadfin Porgy (Evynnis cardinalis) in the Northern South China Sea Using Ensemble Models Under Medium-to-Long-Term Future Climate Scenarios
作者：Zhang, Junyi;Li, Jiajun;Cai, Yancong;Zhang, Kui;Xu, Youwei;Chen, Zuozhi;Xu, Shannan;Zhang, Junyi;Li, Jiajun;Cai, Yancong;Zhang, Kui;Xu, Youwei;Chen, Zuozhi;Xu, Shannan
关键词：
Evynnis cardinalis ; ensemble model; climatic change; Biomod2; northern South China Sea -
Climate Variability and Fish Community Dynamics: Impacts of La Niña Events on the Continental Shelf of the Northern South China Sea
作者：Liu, Zikai;Li, Jiajun;Zhang, Junyi;Chen, Zuozhi;Zhang, Kui;Liu, Zikai;Zhang, Junyi;Li, Jiajun;Chen, Zuozhi;Zhang, Kui;Li, Jiajun;Chen, Zuozhi;Zhang, Kui
关键词：La Ni & ntilde;a conditions; fish community structure; species distribution models; climate change; fish diversity; South China Sea
-
Impact of Climate Change on the Habitat Distribution of Decapterus macarellus in the South China Sea
作者：Shen, Qikun;Zhang, Peng;Yu, Wenming;Cai, Yancong;Li, Jie;Chen, Zuozhi;Fan, Jiangtao;Shen, Qikun;Zhang, Peng;Yu, Wenming;Cai, Yancong;Li, Jie;Chen, Zuozhi;Fan, Jiangtao;Zhang, Peng;Chen, Zuozhi;Xiong, Pengli
关键词：SDMs;
Decapterus macarellus ; the South China Sea; climate change; environmental factors -
Variations in the fish community of the Beibu Gulf (South China Sea) following fishery resources protection measures
作者：Su, Li;Zhang, Kui;Xu, Youwei;Chen, Zuozhi;Su, Li;Zhang, Kui;Xu, Youwei;Chen, Zuozhi;Zhang, Kui;Xu, Youwei;Chen, Zuozhi
关键词：Beibu Gulf; Fish community; Mean trophic level; Diversity; Fishery resources conservation; Fishery resources policy
-
Status assessment of the Beibu Gulf coastal fishery ecosystem using a multispecies size-spectrum model
作者：Hong, Xiaofan;Zhang, Kui;Li, Jiajun;Xu, Youwei;Sun, Mingshuai;Xu, Shannan;Cai, Yancong;Qiu, Yongsong;Chen, Zuozhi;Zhang, Kui;Li, Jiajun;Xu, Youwei;Sun, Mingshuai;Xu, Shannan;Cai, Yancong;Qiu, Yongsong;Chen, Zuozhi;Zhang, Kui;Li, Jiajun;Xu, Youwei;Sun, Mingshuai;Xu, Shannan;Cai, Yancong;Qiu, Yongsong;Chen, Zuozhi
关键词：Beibu Gulf; Coastal fishery ecosystem; Multispecies size-spectrum model; Relative fishing effort; Climate anomalies
-
An extensive assessment of exploitation indicators for multispecies fisheries in the South China Sea to inform more practical and precise management in China
作者：Zhang, Kui;Su, Li;Chen, Zuozhi;Qiu, Yongsong;Zhang, Kui;Su, Li;Chen, Zuozhi;Qiu, Yongsong;Zhang, Kui;Chen, Zuozhi
关键词：Data-limited assessment models; Exploitation status; Fisheries management; Overfishing; The South China Sea; Trawl fisheries
-
Detecting fish community structure in open waters using environmental DNA: a case study from the central South China Sea
作者：Chen, Ting;Zhang, Shuai;Jiang, Peiwen;Chen, Zuozhi;Zhang, Jun;Xu, Shannan;Li, Min;Chen, Ting;Zhang, Shuai;Chen, Zuozhi;Zhang, Jun;Xu, Shannan;Li, Min;Zhang, Shuai;Xu, Shannan;Li, Min
关键词：eDNA; central South China Sea; fish diversity; fish community structure; environmental factors
