中国水产科学2024，Vol.31Issue(11)：1306-1315,10.DOI:10.12264/JFSC2024-0091
杭州湾及其邻近海域口虾蛄资源密度分布及个体体重的季节性变化
Seasonal variation of the resource density distribution and individual body weight of Oratosquilla oratoria in the Hangzhou Bay and its adjacent waters
摘要
Abstract
To study the spatio-temporal distribution and seasonal variation of resource density of Oratosquilla oratoria in Hangzhou Bay and its adjacent waters,single bottom trawl surveys and environmental data collection were conducted in March(winter),May(spring),July(summer),and November(autumn)in 2014.The spatial distribution characteristics of resource density,seasonal variation of barycenter,and body mass were analyzed,and the relationship between resource distribution and environmental factors was analyzed using GAM model.The results showed that the average resource density of Oratosquilla oratoria in Hangzhou Bay and its adjacent waters showed a changing trend of autumn>winter>spring>summer,with the average resource density of 20.40 kg/km2 in autumn being the highest,and 10.09 kg/km2 in summer being the lowest,which was more than twice that of summer.The Oratosquilla oratoria resources were mainly distributed on the offshore side of the island chain formed by Zhoushan island-Qushan island-Sijiaoshan-Huaniao Mountain,while the distribution of the Oratosquilla oratoria was relatively small on the coastal side near the mouth of Hangzhou Bay.The center of gravity of its resource density was located at a water depth of 30-40 m,and the overall trend was from south to north,from outside to inside.The average body mass of Oratosquilla oratoria individuals showed the order of summer>winter>spring>autumn,and no significant difference was observed in body mass between different seasons.GAM model analysis showed that season,bottom salinity,and bottom chlorophyll significantly affected the resource density of Oratosquilla oratoria.The bottom salinity was the most significant factor affecting the distribution of Oratosquilla oratoria,and the average bottom salinity of Oratosquilla oratoria occurence showed the trend of summer>winter>spring>autumn.This study provides technical support for revealing the spatio-temporal distribution and seasonal variation of the resource density of Oratosquilla oratoria in Hangzhou Bay and its adjacent waters.It also provides guidance for effectively managing and rationally utilizing Oratosquilla oratoria resources in this area.关键词
杭州湾海域/口虾蛄/资源密度/时空分布/季节性变化Key words
Hangzhou Bay/Oratosquilla oratoria/resource density/spatiotemporal distribution/seasonal variation分类
农业科技引用本文复制引用
徐国强,张洪亮,周永东..杭州湾及其邻近海域口虾蛄资源密度分布及个体体重的季节性变化[J].中国水产科学,2024,31(11):1306-1315,10.基金项目
国家自然科学基金项目(32303073) （32303073）
舟山市基础研究项目(2024C31047) （2024C31047）
浙江渔场渔业资源动态监测调查项目(HYS-CZ-202314). （HYS-CZ-202314）
