Study on the Geographic Variation and Trophic Variation of Todarodes pacificus in Different Areas Based on Stable Isotope Information from the Gladius-Reference-Cited by-同舟云学术

Study on the Geographic Variation and Trophic Variation of Todarodes pacificus in Different Areas Based on Stable Isotope Information from the Gladius

Published:2023-04-04 Issue:4 Volume:12 Page:551
ISSN:2079-7737
Container-title:Biology
language:en
Short-container-title:Biology

Author:

Lu Huajie¹²³⁴^ORCID,Wang Rui¹,Chen Jing¹,Ou Yuzhe¹,Zhao Maolin¹,Zhang Biqiang¹

Affiliation:

1. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China

2. Key Laboratory of Marine Ecological Monitoring and Restoration Technologies, MNRs, Shanghai 201306, China

3. National Distant-Water Fisheries Engineering Research Center, Shanghai Ocean University, Shanghai 201306, China

4. Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China

Abstract

The Japanese flying squid (Todarodes pacificus) is an important cephalopod in the northwest Pacific Ocean. In this study, the proostracum of the gladius of T. pacificus samples collected by Chinese squid fishing vessels in the East China Sea and the Sea of Japan in August and December 2018 were continuously cut, and stable isotope values of the cut fragments were used to analyze the migration path and feeding ecology of T. pacificus. The results showed that when the proostracum grew to 120 mm from the distal end, T. pacificus began to migrate. In the East China Sea, T. pacificus migrated to low latitudes and nearshore areas, and the trophic level of their food showed no large changes during migration. In the Sea of Japan, T. pacificus migrated to high latitudes and offshore areas, and the trophic level of their food showed a decreasing trend during migration. There was no significant difference in migration or feeding ecology between females and males, but the competitive capacity of the females may be stronger than that of the males. The results provided a scientific basis for the scientific management and development of T. pacificus resources.

Funder

National Natural Science Foundation of China

National Key R&D Program of China

Publisher

MDPI AG

Subject

General Agricultural and Biological Sciences,General Immunology and Microbiology,General Biochemistry, Genetics and Molecular Biology

Link

https://www.mdpi.com/2079-7737/12/4/551/pdf

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