Welcome to Chinese Journal of Applied Ecology! Today is Share:

Chinese Journal of Applied Ecology ›› 2025, Vol. 36 ›› Issue (3): 903-910.doi: 10.13287/j.1001-9332.202503.035

• Original Articles • Previous Articles     Next Articles

Spatiotemporal distribution of Lagocephalus spadiceus and the relationship with environmental factors in the Beibu Gulf

XU Hao1,2,3,4, HUANG Liangliang1,2,3*, WANG Caiguang1,2, YANG Yiheng1,2, SONG Jianqiang5, XU Peng6, WU Zhiqiang1,3   

  1. 1College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China;
    2Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin 541004, Guangxi, China;
    3Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas, Guilin University of Technology, Guilin 541004, Guangxi, China;
    4College of Ocean and Earth Sciences, Xiamen University, Xiamen 361002, Fujian, China;
    5Guangxi Jinggong Marine Science and Technology Co. Ltd., Beihai 536000, Guangxi, China;
    6Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation, Qinzhou 535011, Guangxi, China
  • Received:2024-09-24 Accepted:2025-01-06 Online:2025-03-18 Published:2025-05-15

PDF (PC)

1

Abstract: To elucidate the influence of marine environmental factors on the distribution of Lagocephalus spadiceus, we analyzed fisheries and environmental survey data from the Beibu Gulf in April (spring) and August (autumn), 2022. We used the generalized additive model (GAM) to examine the relationship between the distribution of L. spadiceus and marine environmental factors, both before and after the implementation of a fishing moratorium. We showed that the density of L. spadiceus in the Beibu Gulf exhibited significant spatio-temporal variation, which concentrated in the central and northern parts of the gulf during spring and autumn, respectively. Such variation in resource density may be attributed to factors such as chlorophyll a content, salinity, pH, and latitude. The GAM accounted for 91.3% of the cumulative variance in resource density. The resource density of L. spadiceus increased with the increases of chlorophyll content, while it began to decrease after chlorophyll reaching 5 μg·L-1. Both salinity and pH demonstrated a nonlinear relationship with resource density, characterized by multiple peaks, while latitude was positively correlated with resource density. This research provides valuable scientific evidence for the conservation of L. spadiceus resources.

Key words: Lagocephalus spadiceus, generalized additive model (GAM), resource density, Beibu Gulf, environmental factor