Age and Growth of Mitre Squid ( Uroteuthis chinensis ) in the Northwestern South China Sea Based on Statolith Microstructure Analysis
The mitre squid Uroteuthis chinensis is distributed widely in the Chinese coastal areas and contributes to the majority of the Chinese neritic squid fishery, especially in the South China Sea. However, little has been investigated about its life history traits, despite its commercial importance. In...
Published in: | Diversity |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2024
|
Subjects: | |
Online Access: | https://doi.org/10.3390/d16070395 https://doaj.org/article/398d9f963456429891372b633ca92602 |
id |
ftdoajarticles:oai:doaj.org/article:398d9f963456429891372b633ca92602 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:398d9f963456429891372b633ca92602 2024-09-09T19:38:07+00:00 Age and Growth of Mitre Squid ( Uroteuthis chinensis ) in the Northwestern South China Sea Based on Statolith Microstructure Analysis Dan Liu Chi Zhang Jianzhong Guo Haozhan Wang Yumeng Pang Yongjun Tian 2024-07-01T00:00:00Z https://doi.org/10.3390/d16070395 https://doaj.org/article/398d9f963456429891372b633ca92602 EN eng MDPI AG https://www.mdpi.com/1424-2818/16/7/395 https://doaj.org/toc/1424-2818 doi:10.3390/d16070395 1424-2818 https://doaj.org/article/398d9f963456429891372b633ca92602 Diversity, Vol 16, Iss 7, p 395 (2024) Uroteuthis chinensis mitre squid statolith age determination biological characteristics South China Sea Biology (General) QH301-705.5 article 2024 ftdoajarticles https://doi.org/10.3390/d16070395 2024-08-05T17:48:50Z The mitre squid Uroteuthis chinensis is distributed widely in the Chinese coastal areas and contributes to the majority of the Chinese neritic squid fishery, especially in the South China Sea. However, little has been investigated about its life history traits, despite its commercial importance. In this study, using samples of U. chinensis collected through bottom trawlers from December 2019 to March 2021 in the northwestern South China Sea, biological traits including hatching date, growth pattern and dorsal mantle length at maturity of male individuals were explored by age determination based on statolith microstructure analysis. The results indicated that the U. chinensis showed a year-round spawning pattern with three main cohorts (spring, summer and autumn) that can be identified according to their hatching season. The range of the dorsal mantle length (DML) was 117–259 mm for females and 70–312 for males, and the body weight ranged from 55.1 to 480.5 g for females and from 19.3 to 560.2 g for males; the age ranges were estimated between 82 and 173 days for females and between 76 and 175 days for males. As for the length–weight relationship, males possessed a larger mantle length than females, while the body weight of females increased more compared to males at the same mantle length. The population recruits to the fishing ground, with individuals reaching sexual maturity at around 3 months, and the lifespan is less than 200 days. The growth model is well described by the exponential equation, which revealed that spring and autumn cohorts showed a higher growth rate than summer cohorts. As for male individuals, the smallest dorsal mantle length at maturity (DML 50% ) was recorded in the spring cohort (DML 50% = 116 mm) compared with the summer (DML 50% = 129 mm) and autumn cohorts (DML 50% = 149 mm). This study provides key and updated fishery biological information of U. chinensis in the South China Sea and contributes to the understanding of U. chinensis resources. Article in Journal/Newspaper DML Directory of Open Access Journals: DOAJ Articles Fishing Ground ENVELOPE(-55.848,-55.848,49.550,49.550) Mitre ENVELOPE(-66.691,-66.691,-66.204,-66.204) The Mitre ENVELOPE(-66.691,-66.691,-66.204,-66.204) Diversity 16 7 395 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Uroteuthis chinensis mitre squid statolith age determination biological characteristics South China Sea Biology (General) QH301-705.5 |
spellingShingle |
Uroteuthis chinensis mitre squid statolith age determination biological characteristics South China Sea Biology (General) QH301-705.5 Dan Liu Chi Zhang Jianzhong Guo Haozhan Wang Yumeng Pang Yongjun Tian Age and Growth of Mitre Squid ( Uroteuthis chinensis ) in the Northwestern South China Sea Based on Statolith Microstructure Analysis |
topic_facet |
Uroteuthis chinensis mitre squid statolith age determination biological characteristics South China Sea Biology (General) QH301-705.5 |
description |
The mitre squid Uroteuthis chinensis is distributed widely in the Chinese coastal areas and contributes to the majority of the Chinese neritic squid fishery, especially in the South China Sea. However, little has been investigated about its life history traits, despite its commercial importance. In this study, using samples of U. chinensis collected through bottom trawlers from December 2019 to March 2021 in the northwestern South China Sea, biological traits including hatching date, growth pattern and dorsal mantle length at maturity of male individuals were explored by age determination based on statolith microstructure analysis. The results indicated that the U. chinensis showed a year-round spawning pattern with three main cohorts (spring, summer and autumn) that can be identified according to their hatching season. The range of the dorsal mantle length (DML) was 117–259 mm for females and 70–312 for males, and the body weight ranged from 55.1 to 480.5 g for females and from 19.3 to 560.2 g for males; the age ranges were estimated between 82 and 173 days for females and between 76 and 175 days for males. As for the length–weight relationship, males possessed a larger mantle length than females, while the body weight of females increased more compared to males at the same mantle length. The population recruits to the fishing ground, with individuals reaching sexual maturity at around 3 months, and the lifespan is less than 200 days. The growth model is well described by the exponential equation, which revealed that spring and autumn cohorts showed a higher growth rate than summer cohorts. As for male individuals, the smallest dorsal mantle length at maturity (DML 50% ) was recorded in the spring cohort (DML 50% = 116 mm) compared with the summer (DML 50% = 129 mm) and autumn cohorts (DML 50% = 149 mm). This study provides key and updated fishery biological information of U. chinensis in the South China Sea and contributes to the understanding of U. chinensis resources. |
format |
Article in Journal/Newspaper |
author |
Dan Liu Chi Zhang Jianzhong Guo Haozhan Wang Yumeng Pang Yongjun Tian |
author_facet |
Dan Liu Chi Zhang Jianzhong Guo Haozhan Wang Yumeng Pang Yongjun Tian |
author_sort |
Dan Liu |
title |
Age and Growth of Mitre Squid ( Uroteuthis chinensis ) in the Northwestern South China Sea Based on Statolith Microstructure Analysis |
title_short |
Age and Growth of Mitre Squid ( Uroteuthis chinensis ) in the Northwestern South China Sea Based on Statolith Microstructure Analysis |
title_full |
Age and Growth of Mitre Squid ( Uroteuthis chinensis ) in the Northwestern South China Sea Based on Statolith Microstructure Analysis |
title_fullStr |
Age and Growth of Mitre Squid ( Uroteuthis chinensis ) in the Northwestern South China Sea Based on Statolith Microstructure Analysis |
title_full_unstemmed |
Age and Growth of Mitre Squid ( Uroteuthis chinensis ) in the Northwestern South China Sea Based on Statolith Microstructure Analysis |
title_sort |
age and growth of mitre squid ( uroteuthis chinensis ) in the northwestern south china sea based on statolith microstructure analysis |
publisher |
MDPI AG |
publishDate |
2024 |
url |
https://doi.org/10.3390/d16070395 https://doaj.org/article/398d9f963456429891372b633ca92602 |
long_lat |
ENVELOPE(-55.848,-55.848,49.550,49.550) ENVELOPE(-66.691,-66.691,-66.204,-66.204) ENVELOPE(-66.691,-66.691,-66.204,-66.204) |
geographic |
Fishing Ground Mitre The Mitre |
geographic_facet |
Fishing Ground Mitre The Mitre |
genre |
DML |
genre_facet |
DML |
op_source |
Diversity, Vol 16, Iss 7, p 395 (2024) |
op_relation |
https://www.mdpi.com/1424-2818/16/7/395 https://doaj.org/toc/1424-2818 doi:10.3390/d16070395 1424-2818 https://doaj.org/article/398d9f963456429891372b633ca92602 |
op_doi |
https://doi.org/10.3390/d16070395 |
container_title |
Diversity |
container_volume |
16 |
container_issue |
7 |
container_start_page |
395 |
_version_ |
1809907121982013440 |