The early life stages of marine organisms are pivotal in shaping community dynamics and resource availability.In this study,we focused on Portunus trituberculatus,a crustacean integral to China's fisheries economy...The early life stages of marine organisms are pivotal in shaping community dynamics and resource availability.In this study,we focused on Portunus trituberculatus,a crustacean integral to China's fisheries economy,and examined the effect of sea surface temperature(SST)in its critical early life stages on subsequent yields.To analyze the correlation between SST in different larval stages and the corresponding yield of P.trituberculatus,we simulated the transport and distribution of larvae from 2014 to 2022 by employing circulation models and Lagrangian particle tracking experiments(LPTE).In the five years(2014,2015,2016,2019,and 2020),particles were transported in a northwestern direction and moved in the direction of low SST.The distribution of particles in the megalopa stage(M stage)were located in the region of the lower temperature.In 2017,2018,and 2021,the particles were transported in a northeastern direction but they did not move with the gradient of low SST in these years,and the particles in the last M stage were located in the region where the SST was at the peak of the time period.In 2022,the distribution was observed for most of the particles in the southwestern part of Zhejiang coast,a small part of them were transported in the northwestern direction and a small amount of particles was distributed offshore along the northern area of the Zhejiang coast.The correlations between the SST at each stage of larvae with the corresponding year's yield showed that the yield of P.trituberculatus decreased significantly(R=-0.772,P=0.015)with increasing SST at the M stage.This study preliminarily explains the correlation between SST at the larval stage and the yield of P.trituberculatus and provides essential information for scientific stock enhancement in the future.展开更多
在水温23．5～28．5℃下，将体质量（6．76±0．1）g的中华绒螯蟹随机分为6组，置于24个100 cm ×50 cm ×50 cm的玻璃缸中，每组4个平行，每个平行30尾中华绒螯蟹，投喂含有0（对照组）、0．1％、0．5％、1．0％、1．5％、...在水温23．5～28．5℃下，将体质量（6．76±0．1）g的中华绒螯蟹随机分为6组，置于24个100 cm ×50 cm ×50 cm的玻璃缸中，每组4个平行，每个平行30尾中华绒螯蟹，投喂含有0（对照组）、0．1％、0．5％、1．0％、1．5％、2．0％复方中草药的饲料60d。试验结果表明，除0．1％组与对照组差异不显著（P＞0．05）外，其他各试验组中华绒螯蟹的质量增加率和特定生长率均显著高于对照组（P＜0．05）。1．0％组中华绒螯蟹血细胞吞噬率和吞噬指数最高（P＜0．05）；血清和肝胰脏组织中超氧化物歧化酶、过氧化物歧化酶、过氧化氢酶的活性最高，与对照组差异显著（P＜0．05）。血清中酸性磷酸酶活性，除0．1％和2．0％组（P＞0．05）外，其他各处理组酸性磷酸酶活性显著升高（P＜0．05）。0．5％、1．0％和1．5％组中华绒螯蟹的碱性磷酸酶活性与对照组差异显著（P＜0．05），其他各组与对照组差异不显著（P＞0．05）。血清和肝胰脏组织中溶菌酶活性均随饲料复方中草药添加量的增加先升后降，显著高于对照组（P＜0．05）。肝胰脏中丙二醛的含量随着复方中草药添加量的增加而显著下降。除0．1％组外，其他组的中华绒螯蟹死亡率显著降低（P＜0．05），免疫保护率显著性升高（P＜0．05）。在基础饲料中添加1．0％的复方中草药，中华绒螯蟹生长、非特异性免疫及抗病力较强。展开更多
基金Supported by the National Key Research and Development Program of China(No.2019YFD0901304)the Public Welfare Technology Application Research Project of Zhejiang(No.LGN21C190009)the Science and Technology Project of Zhoushan(No.2022C41003)。
文摘The early life stages of marine organisms are pivotal in shaping community dynamics and resource availability.In this study,we focused on Portunus trituberculatus,a crustacean integral to China's fisheries economy,and examined the effect of sea surface temperature(SST)in its critical early life stages on subsequent yields.To analyze the correlation between SST in different larval stages and the corresponding yield of P.trituberculatus,we simulated the transport and distribution of larvae from 2014 to 2022 by employing circulation models and Lagrangian particle tracking experiments(LPTE).In the five years(2014,2015,2016,2019,and 2020),particles were transported in a northwestern direction and moved in the direction of low SST.The distribution of particles in the megalopa stage(M stage)were located in the region of the lower temperature.In 2017,2018,and 2021,the particles were transported in a northeastern direction but they did not move with the gradient of low SST in these years,and the particles in the last M stage were located in the region where the SST was at the peak of the time period.In 2022,the distribution was observed for most of the particles in the southwestern part of Zhejiang coast,a small part of them were transported in the northwestern direction and a small amount of particles was distributed offshore along the northern area of the Zhejiang coast.The correlations between the SST at each stage of larvae with the corresponding year's yield showed that the yield of P.trituberculatus decreased significantly(R=-0.772,P=0.015)with increasing SST at the M stage.This study preliminarily explains the correlation between SST at the larval stage and the yield of P.trituberculatus and provides essential information for scientific stock enhancement in the future.
文摘在水温23．5～28．5℃下，将体质量（6．76±0．1）g的中华绒螯蟹随机分为6组，置于24个100 cm ×50 cm ×50 cm的玻璃缸中，每组4个平行，每个平行30尾中华绒螯蟹，投喂含有0（对照组）、0．1％、0．5％、1．0％、1．5％、2．0％复方中草药的饲料60d。试验结果表明，除0．1％组与对照组差异不显著（P＞0．05）外，其他各试验组中华绒螯蟹的质量增加率和特定生长率均显著高于对照组（P＜0．05）。1．0％组中华绒螯蟹血细胞吞噬率和吞噬指数最高（P＜0．05）；血清和肝胰脏组织中超氧化物歧化酶、过氧化物歧化酶、过氧化氢酶的活性最高，与对照组差异显著（P＜0．05）。血清中酸性磷酸酶活性，除0．1％和2．0％组（P＞0．05）外，其他各处理组酸性磷酸酶活性显著升高（P＜0．05）。0．5％、1．0％和1．5％组中华绒螯蟹的碱性磷酸酶活性与对照组差异显著（P＜0．05），其他各组与对照组差异不显著（P＞0．05）。血清和肝胰脏组织中溶菌酶活性均随饲料复方中草药添加量的增加先升后降，显著高于对照组（P＜0．05）。肝胰脏中丙二醛的含量随着复方中草药添加量的增加而显著下降。除0．1％组外，其他组的中华绒螯蟹死亡率显著降低（P＜0．05），免疫保护率显著性升高（P＜0．05）。在基础饲料中添加1．0％的复方中草药，中华绒螯蟹生长、非特异性免疫及抗病力较强。
