A Comparative Study on the Buoyancy of Resting Eggs from Different Artemia Populations, with Emphasis on Its Relationships with Habitat Salinity and Biometric Characters of Resting Eggs

作     者：ZHOU Jiaxuan HUANG Zhike GUO Yan SUN Shichun ZHOU Jiaxuan;HUANG Zhike;GUO Yan;SUN Shichun

作者机构：The Key Laboratory of Mariculture(Ministry of Education)and Institute of Evolution&Marine BiodiversityOcean University of ChinaQingdao 266003China Xinjiang Uygur Autonomous Region Fisheries Research InstituteUrumqi 830002China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2022年第21卷第6期

页      面：1585-1596页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 071004[理学-水生生物学] 

基　　金：supported by the Science and Technology Project of Tibet Autonomous Region(Nos.XZ201703-GB-04,XZ202102YD0022C) the Science and Technology Project of Zhejiang Province(No.2020C26008) 

主　　题：brine shrimp cyst floating capacity shell thickness 

摘      要：The buoyancy of Artemia resting eggs is a feature with both biological and economic *** the buoyancy of resting eggs is dependent on the specific weight of the eggs or salinity of ambient water,we suppose that habitat salinity may exert a selection pressure on resting egg buoyancy,and thereby lower habitat salinity may result in better floating capacity of resting eggs and vice *** this study,we compared the floating capacity of resting eggs from 25 Artemia *** results showed that the floating capacity of resting eggs varied greatly among different *** minimum salinity to float some eggs varied from 0 to *** salinity at which all resting eggs floated varied from 80 to *** FS_(50)(salinity with 50%eggs floating)of Zhundong and Yuncheng population was not detectable(over 50%eggs floating in distilled water),that of Kyêbxang Co population was 4.3,while the maximum value found in Dabancheng population was *** terms of the‘apparent specific weight’of resting eggs,18 populations exhibited a single-peak distribution pattern,while the other 7 populations showed a multiple-peak or non-peak *** correlations were found between FS50 and chorion thickness,and between FS_(50) and the volume percentage of the chorion in eggs,supporting a previous standpoint that shell thickness was a determinative factor for the floating capacity of resting eggs.A positive correlation was determined between FS50 and habitat *** hypothesis that habitat salinity may cause a directional selection on the buoyancy of resting eggs seems to be true.