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Effects of UV-B radiation on fitness related behaviors of the sea urchin Strongylocentrotus intermedius

Journal of Oceanology and Limnology 2018年第5期36卷 1681-1687页

作者： SHI Dongtao DING Jingyun ZHANG Lingling ZHANG Lisheng SUN Jiangnan changyaqing ZHAO Chong Key Laboratory of Mariculture ＆ Stock Enhancement in North China＇s Sea Ministry of AgricultureDalian Ocean University Dalian 116023China

Ozone depletion induced by anthropogenic gases has been increasing the transmission of solar ultraviolet-B radiation(UV-B, 280–315 nm) through the atmosphere, which may impact the fitness of marine invertebrates in intertidal and shallow waters. To our knowledge, however, the responses of fitness related behaviors to UV-B radiation at different intensities have been rarely studied in marine invertebrates. For the first time, the present study investigated the eff ects of exposure of one hour to UV-B radiation at different intensities on foraging behavior, Aristotle's lantern reflex and righting behavior of the sea urchin Strongylocentrotus intermedius. Exposure of one hour to UV-B radiation at 10 μW/cm^2 significantly reduced foraging behavior. An intensity dependent eff ect of exposure to UV-B radiation was found in the duration of the Aristotle's lantern reflex. Exposure to UV-B radiation at 20 μW/cm^2 for one hour significantly reduced the duration of the Aristotle's lantern reflex, but 10 μW/cm^2 did not. There was no significant diff erence of righting response time among sea urchins exposed to 0, 10 and 20 μW/cm^2 for one hour. To test potential carryover ef fects, the behavioral traits were re-measured three days later. We found significant carryover eff ects of UV-B radiation on foraging time and righting response time, but not on the duration of the Aristotle's lantern reflex. The present study indicates that a brief exposure of one hour to UV-B radiation can significantly aff ect the duration of Aristotle's lantern reflex, righting response time and foraging behavior of a sea urchin, although the immediate impacts and carryover eff ects were highly trait dependent. This study provides new information into the behavioral responses of marine invertebrates to exposure to UV-B radiation. Future studies should be carried out to investigate long-term carryover eff ects of UV-B radiation on behavioral and physiological fitness related traits.

关键词： sea urchin UV-B foraging behavior righting behavior Aristotle's lantern reflex fitness

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Studies on hybridization effects of different geographic populations of Chlamys farreri Ⅱ.The medium-term growth and development of Chlamys farreri populations from China and Russia and their reciprocal crosses

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Acta Oceanologica Sinica 2003年第2期22卷 255-264页

作者： LiuXiaolin changyaqing XiangJianhai LiFuhua LiuXianjie BrovkinaElenaPavlovna CollegeofAnimalScienceandTechnology NorthwestSci-TechUniversityofAgricultureandForestryYangling712100China KeyLabofMarineEcologyinAquacultureofMinistryofAgriculture DalianFisheriesUniversityDalian116023China ExperimentalMarineBiologyLaboratory InstituteofOceanologyChineseAcademyofSciencesQingdao266071China KeyLabofMarineEcologyinAquacultureofMinistryofAgricultureofMinistryofAgriculture DalianFisheriesUniversityDalian116023China Far-EastStateTechnicalFisheriesUniversity Vladivostok690000Russia

Based on the research of juvenile (2, 3, 4 months) growth and survival of three populations of two different geographic areas in Chlamys farreri from Russian and China and their F1 hybrids derived from Chinese cultural population (CC) (?) × Russian population (RW) (?) , Chinese wild population (CW) (?) × Russian population (RW) (?), Russian population (RW) (?) × Chinese wild population (CW) (?) , the study of the medium-term (6, 8, 10, 12 months) growth and development of Chlamys farreri was carried out. The four determined results indicated that there existed different extent heterosis (3% -52%) for the growth in three types of F1 hybrids, and the offspring derived from CC(?) ×R(?) had a stronger heterosis among the crosses at the medium-term; the uptrend among traits are wet weight >shell width>shell length> shell height, Chinese cultural population could be recognized as excellent parent, and seasonal variations influence very much on the daily increment and growth rate of each trait of Chlamys farreri and it is only able to survive and could barely grow in winter (6-8 months), but grows fast in temperate season (10-12 months).

关键词： Chlamys farreri population hybridization medium-term growth and development heterosis

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家庭养老功能弱化了吗?——基于经济与服务的双重考察

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社会保障评论 2020年第2期4卷 131-145页

作者：黄健元常亚轻河海大学人口研究所

当前学界盛行的家庭养老功能弱化论在理论和实践上存在严重的误区,虽有少数学者提出质疑,但并没有解释家庭养老功能如何变化。基于"分离-整合"视角,本文将家庭养老功能分为经济供养和服务提供两个维度,利用统计数据和调查资料,深入剖析... 详细信息

当前学界盛行的家庭养老功能弱化论在理论和实践上存在严重的误区,虽有少数学者提出质疑,但并没有解释家庭养老功能如何变化。基于"分离-整合"视角,本文将家庭养老功能分为经济供养和服务提供两个维度,利用统计数据和调查资料,深入剖析经济供养和服务提供功能变化。研究表明,服务提供功能普遍弱化,经济供养功能呈强化和弱化分化趋势。整合经济、服务功能,发现部分家庭经济供养功能强化而服务提供功能弱化,部分家庭经济供养和服务提供功能均弱化。家庭养老功能分化理论,对重新审视家庭养老研究、修复提升家庭养老功能及明确养老主体责任分担等具有重要的理论和实践价值。

关键词：家庭养老功能经济供养服务提供分化养老责任

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