Analysis of Feeding Habits of Boreopacific Armhook Squid Gonatopsis borealis in the Northwest Pacific Ocean based on High-Throughput Sequencing
HE Junjie1, LIU Bilin1,2,3,4, SONG Linwei1, OU Yuzhe1
1. College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai 201306, China; 2. National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China; 3. Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China; 4. Key Laboratory of Sustainable Utilization of Oceanic Fisheries, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
Abstract：To investigate and clarify the feeding habits and position of boreopacific armhook squid Gonatopsis borealis in the marine food web and ecological function, the stomach contents were analyzed in 14 individuals of boreopacific armhook squid with body weight from 293 g to 593 g collected from the high seas of the Northwest Pacific Ocean(E 161°55'36″, N 44°59'18″) using high-throughput sequencing. A total of 543 647 high-quality sequences were obtained, yielding 107 operational taxonomic units (OTUs) through cluster analysis, and 14 prey species were identified, via taxonomic classification and filtering, including 4 phyla, 7 classes, 11 orders, 12 families, and 14 genera. G. borealis had the foods primarily composed of cephalopods, fishes, and zooplankton (including euphausiids, medusae, etc.), with dominant prey species of Sigmops gracilis, Sardinops sagax, and Euphausia pacifica, indicate that G. borealis had a broad feeding spectrum, closely associated with the natural prey composition in its habitat. In addition, feeding preferences were shown to be varied among different mantle length groups, large individuals tending to prey more frequently on fishes. Cannibalistic behavior was more pronounced in immature individuals. The finding provides a scientific basis for clarifying of the trophic position of G. borealis in the Northwest Pacific ecosystem and enriches the understanding of cephalopod feeding ecology, especially, offering valuable support for fishery resource assessment and the development of ecosystem-based fishery management strategies in the Northwest Pacific.
何骏杰, 刘必林, 宋林玮, 欧玉哲. 基于高通量测序的西北太平洋北方拟黵乌贼食性初步分析[J]. 水产科学, 2026, 45(5): 709-717.
HE Junjie, LIU Bilin, SONG Linwei, OU Yuzhe. Analysis of Feeding Habits of Boreopacific Armhook Squid Gonatopsis borealis in the Northwest Pacific Ocean based on High-Throughput Sequencing. Fisheries Science, 2026, 45(5): 709-717.
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