Journal of Tropical Oceanography >
Diet and trophic level analysis of triggerfish (Balistapus undulatuse) in coral reefs of Nansha
Copy editor: YAO Yantao
Received date: 2021-01-15
Revised date: 2021-04-17
Online published: 2021-04-20
Supported by
The Strategic Priority Research Program of the Chinese Academy of Sciences(XDA13020104)
National Natural Science Foundation of China(41806188)
National Key Research and Development Project of China(2016YFC0502800)
Science and Technology Planning Project of Guangdong Province, China(2020B1212060058)
As an omnivorous and widespread fish in tropical coral reefs, Balistapus Undulatus is an important sea urchins predator according to previous observations. However, the accurate food composition and ecological function of B. Undulatus remain unclear due to the lack of food composition information in natural environment. Here, we studied samples of triggerfish collected from the coral reef of Nansha in the summer of 2017. We used the high-throughput sequencing method targeted on the Cytochrome c. Oxidase subunit I (COI) gene and stable isotopes method to analyze the gut content composition of B. Undulatus, and conducted trophic levels analysis. Thirteen species were detected, including Arthropoda, Chordata and Annelida. Crabs of the Xanthidae family were the most important food item, such as Etisus sp., Luniella pubescens and Liomera rugata, accounting for 61.8%, 6.7% and 1.8%, respectively. Fish also made a contribution, accounting for 23.5% of the total food sequence. The isotopic results show that the trophic level was 3.71±0.07, which was consistent with the results of molecular detection. The results show that the main food of triggerfish (B. Undulatus) was small crustaceans and herbivore parrotfish. This study deepens our understanding of the ecological role of triggerfish.
ZHANG Chen , HU Simin , LIN Xianzhi , ZHOU Tiancheng , HUANG Hui , LIU Sheng . Diet and trophic level analysis of triggerfish (Balistapus undulatuse) in coral reefs of Nansha[J]. Journal of Tropical Oceanography, 2022 , 41(1) : 7 -14 . DOI: 10.11978/2021008
表1 波纹钩鳞鲀样品信息Tab. 1 Information on B.undulatu samples |
编号 | 体重/g | 体长/cm | 饱食度 | 消化道内容物 | 高通量测序 | 同位素分析 | δ15N值/‰ | δ13C值/‰ | 营养级 |
---|---|---|---|---|---|---|---|---|---|
Balun1 | 118.5 | 14.0 | 30% | 海胆棘刺 | √ | √ | 8.94 | -15.70 | 3.63 |
Balun2 | 120.9 | 14.0 | 20% | - | √ | √ | 9.60 | -15.96 | 3.82 |
Balun3 | 97.9 | 12.5 | 20% | 贝、螺 | √ | √ | 9.13 | -16.95 | 3.69 |
Balun4 | 60.1 | 10.5 | 30% | 贝、头足类 | √ | ||||
Balun5 | 188.6 | 15.3 | 50% | 大型藻类 | √ | √ | 9.18 | -16.08 | 3.70 |
Balun6 | 157.7 | 14.0 | 60% | 蟹、螺、海胆、藻类 | √ | √ | 9.15 | -15.79 | 3.69 |
Balun7 | 93.6 | 12.0 | 40% | 沙子、贝、海胆 | √ |
注: “-”表示Balun2消化道内容物无法识别, 空白表示未进行相应的分析 |
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