Current Population,Habitat Status and Species of Amphioxus in Dongshan Bay,Fujian Province  

作　　者：WENG Zhaohong XIE Yangjie FANG Qi LI Jun LIU Jingwen WANG Jiaqiao HUANG Liangmin QU Tao XIE Wenliang 

机构地区：[1]State Key Laboratory of Mariculture Breeding,Fisheries College of Jimei University,Xiamen 361021,China [2]Key Laboratory of Healthy Mariculture for the East China Sea of Ministry of Agriculture and Rural Affairs,Fisheries College of Jimei University,Xiamen 361021,China [3]Third Institute of Oceanography,Ministry of Natural Resources,Xiamen 361005,China [4]College of Ocean Food and Biological Engineering,Jimei University,Xiamen 361021,China

出　　处：《Journal of Ocean University of China》2025年第2期417-426,共10页中国海洋大学学报(英文版)

基　　金：supported by grants from the Science and Technology Bureau of Xiamen(No.3502Z20227207)。

摘　　要：Dongshan Bay,along with Xiamen Bay,serves as a significant distribution area for amphioxus in Fujian Province.In this survey,we observed that the sedimentary environment of Dongshan Bay has been seriously silted due to rapid economic development and the thriving aquaculture industry.Consequently,there has been a significant reduction in suitable habitats for amphioxus and a sharp decline in its resource abundance.Totally 9 amphioxuses were collected from its eastern region in 2022 with a population density of 18.75 ind m^(-2) and a body length from 34.15 to 48.02 mm.The amphioxuses acquired in this investigation were classified as Branchiostoma japonicum based on morphological traits,such as a cuspate rostral fin,measurements of angles between the dorsal and super-caudal fins,angles between the pre-anal and sub-caudal fins,along with an accurate count of pre-anal fin chambers which matched those observed in B.japonicum.Moreover,a molecular barcoding analysis was conducted using a fragment of the mitochondrial COI gene.The results indicated that Branchiostoma sp.from Dongshan Bay in this study belongs to B.japonicum,providing additional support for the morphological identification results.Considering amphioxuses are still surviving in Dongshan Bay despite the destruction of their habitat,it is recommended to implement measures to safeguard their resources and habitats.The measures may include designating protection areas,strengthening law enforcement management to prohibit sand mining,regulating the scale of cage aquaculture,and augmenting wild resources through artificial breeding and release.

关 键 词：AMPHIOXUS distribution species identification habitat status Dongshan Bay 

分 类 号：Q958.8[生物学—动物学]