Spatiotemporal Variation and Predictors of the Purpleback Flying Squid (Sthenoteuthis oualaniensis) Distribution Surrounding the Xisha and Zhongsha Islands during a Fishing Moratorium
文献类型： 外文期刊
作者： Wang, Liangming 1 ; Yang, Changping 1 ; Shan, Binbin 1 ; Liu, Yan 1 ; Zou, Jianwei 4 ; Sun, Dianrong 1 ; Guo, Tao 5 ;
作者机构： 1.Minist Agr & Rural Affairs, Key Lab Marine Ranching, Guangzhou 510300, Peoples R China
2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510000, Peoples R China
3.Sanya Trop Fisheries Res Inst, Sanya 572018, Peoples R China
4.Beihai Fishery Technol Extens Stn, Beihai 536000, Peoples R China
5.Hainan Adm Off Season Plant Breeding & Seed Prod S, Sanya 572000, Peoples R China
关键词： purpleback flying squid; Xisha and Zhongsha islands; fishing ground; environmental factors
期刊名称：FISHES （ 影响因子：2.1； 五年影响因子：2.4 ）
ISSN：
年卷期： 2024 年 9 卷 7 期
页码：
收录情况： SCI
摘要： As an economic species widely distributed in the South China Sea (SCS), the purpleback flying squid (Sthenoteuthis oualaniensis) still has a large potential for exploitation, and the variations in its use as a resource are highly correlated with environmental and other factors. In this study, using a generalized additive model (GAM) and gradient forest analysis (GFA), in conjunction with environmental factors, the distribution of purpleback flying squid surrounding the Xisha and Zhongsha islands during the fishing moratorium period was investigated. The results indicated that catch per unit effort (CPUE) had a gradual increase from May to July 2023 in the primary fishing area surrounded the Xisha Islands during May to June, then moved southward towards 13-15 degrees N after July. CPUE is used as an important indicator to reflect the abundance of the fishery, while the GFA results show that CPUE has a better fit than catch in this study. Therefore, the subsequent analysis focused on CPUE. Longitude and sea surface temperature (SST) were of relative higher importance, followed by sea surface salinity (SSS), latitude, chlorophyll a concentration (Chla), sea surface height (SSH), and mixed layer depth (MLD). Longitude and CPUE had a significant, positive correlation. The CPUE gradually increased with latitude within 14-16 degrees N. The CPUE increased slowly as SST increased from 29.5 to 30.5 degrees C in the primary fishing area. The Chla in this fishing zone was 0-0.2 mg/m(3) and displayed a significant positive association with CPUE. Conversely, SSS, SSH, and MLD had negative correlations with CPUE. These findings will promote the sustainable utilization of purpleback flying squid in the SCS.
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