摘要
为了探究菲律宾海夏季仔稚鱼表层分布及其与环境因子的关系,于2022年夏季在菲律宾海(11°N~19°N、129°E~138°E)设置了50个采样站位,用大型仔稚鱼网(口径1.3 m,网目0.5 mm)进行表层水平拖网调查。共采集到仔稚鱼38159尾,隶属14目21科56种。日间采集优势种为黄鳍金枪鱼和银灰半棱鳀,夜间采集优势种为银灰半棱鳀,昼夜共同优势种为银灰半棱鳀,占采集样本总数的97.05%。各站位仔稚鱼的总平均密度为292.43 ind./1000 m^(3),日间采集的平均密度为17.61 ind./1000 m^(3),夜间采集的平均密度为526.54 ind./1000 m^(3),昼夜密度分布存在显著差异,密度较高的站位主要分布在15°N附近海域,且均为夜间采集。典型相关分析(Canonical correlation analysis,CCA)表明,影响仔稚鱼分布的环境因子从强到弱依次为海表面盐度(Sea surface salinity,SSS)、海表面温度(Sea surface temperature,SST)和溶解氧(Dissolved oxygen,DO),优势种银灰半棱鳀的分布主要受SSS和DO的影响。研究表明,菲律宾海夏季仔稚鱼的种类组成丰富,表层分布不均匀,昼夜分布差异显著。本研究可为菲律宾海渔业资源评估、保护与利用提供科学依据。
In order to investigate the relationship between the surface distribution of fish larvae and juveniles and environmental factors in the Philippine Sea in summer,surface horizontal trawl surveys were conducted with large larvae and juvenile fish nets(diameter 1.3 m,mesh 0.5 mm) at 50 sampling stations in the Philippine Sea(11°N-19°N,129°E-138°E) during the summer of 2022.A total of 38 159 fish larvae and juveniles,belonging to 14 orders,21 families,and 56 species were collected.The dominant species in the daytime collection were Thunnus albacares and Encrasicholina punctifer,while the dominant species in the nighttime collection was Encrasicholina punctifer,so the co-dominant species was Encrasicholina punctifer,which accounted for 97.05% of the total number of samples collected.The total mean density of fish larvae and juveniles at each station was 292.43 ind./1 000 m3,with a mean density of 17.61 ind./1 000 m3 collected during the daytime and 526.54 ind./1 000 m3 collected during the nighttime,indicating significant differences in diel distribution.The stations with higher densities were mainly located in the sea near 15°N,and all sample were collected at night.Canonical correlation analysis showed that the environmental factors affecting the distribution of fish larvae and juveniles were,in descending order,sea surface salinity,sea surface temperature,and dissolved oxygen.The distribution of the dominant species Encrasicholina punctifer was mainly influenced by sea surface salinity and dissolved oxygen.The study shows that the fish larvae and juveniles in the Philippine Sea have a rich species composition with uneven surface distribution and significant differences in diel distribution.This study can provide a scientific basis for the assessment,conservation and utilization of fishery resources in the Philippine Sea.
作者
吕莉欣
赵恒权
钟俊生
王晓东
叶旭昌
刘志良
LYU Lixin;ZHAO Hengquan;ZHONG Junsheng;WANG Xiaodong;YE Xuchang;LIU Zhiliang(Shanghai Universities Key Laboratory of Marine Animal Taxonomy and Evolution,Shanghai Ocean University,Shanghai 201306,China;College of Marine Living Resource Sciences and Management,Shanghai Ocean University,Shanghai 201306,China;Research Vessel Management Center,Shanghai Ocean University,Shanghai 201306,China)
出处
《上海海洋大学学报》
CAS
CSCD
北大核心
2024年第4期946-959,共14页
Journal of Shanghai Ocean University
基金
国家重点研发计划(2022YFC2804003)
农业农村部全球渔业资源调查监测评估(公海渔业资源综合科学调查)专项(D-8025-23-002)。
关键词
仔稚鱼
种类组成
昼夜分布
菲律宾海
fish larvae and juveniles
species composition
diel distribution
Philippine Sea
