Journal of Tropical Oceanography ›› 2010, Vol. 29 ›› Issue (3): 87-92.doi: 10.11978/j.issn.1009-5470.2010.03.087cstr: 32234.14.j.issn.1009-5470.2010.03.087

• Marine biology • Previous Articles     Next Articles

Effect of heating rate on the upper incipient lethal temperature for copepods

JIANG Zhi-bing1,3, ZENG Jiang-ning1,2, CHEN Quan-zhen1, LIAO Yi-bo1,3, GAO Ai-gen1, XU Xiao-qun1, SHOU Lu1, LIU Jing-jing1, HUANG Yi-jun1   

  1. 1. Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hang-zhou, 310012, China; 2. College of Environmental and Resource Science, Zhejiang University, Hangzhou 310029, China; 3. Key Laboratory of Marine and Estuarine and Fisheries, Ministry of Agriculture, Shanghai 200090, China
  • Received:2008-01-14 Revised:2008-05-08 Online:2010-07-01 Published:2010-05-24
  • Contact: 陈全震, 研究员。 E-mail:chenqz6509@126.com
  • About author:江志兵(1983―), 男, 浙江省温岭市人, 研究实习员, 主要从事海洋生物研究, E-mail: jzb1217@126.com
  • Supported by:

    国家重点基础研究发展计划(2010CB428903); 科技部社会公益研究专项资金项目(2004DIB3J087); 国家海洋局青年科学基金
    (2008113); 海洋公益性行业科研专项经费项目资助(200805069); 国家专项(908-02-04-0, 908-ZC-II-04); 国家海洋局专项(No.
    2011914); 国家海洋局第二海洋研究所基本科研业务费专项(JT0806, JG0921)

Abstract:

To explore how heating rate influences the thermal tolerance of copepods and to recommend heating rate criteria during copepod upper incipient lethal temperature (UILT) tests, four copepod species (Calanus sinicus, Labidocera euchaeta, Euchaeta concinna, Centropages dorsispinatus) collected from the Yueqing Bay were studied in laboratory under different heat-ing rates (1℃•h-1, 0.1℃•min-1, 1℃•min-1, and abrupt exposure). The results showed that thermal tolerance of the same copepod species varied with heating rate, and all the experimental copepods decreased in number from a heating rate of 0.1℃•min-1 to-wards quicker or slower heating rates. Thus, the rate of 0.1℃•min-1 was considered as the standard heating rate for UILT experi-ments. In the trial conducted at 0.1℃•min-1, the 24h-UILT of L. euchaeta, C. dorsispinatus, E. concinna and C. sinicus were 31.0℃, 29.6℃, 29.1℃ and 27.7℃, respectively; the 48h-UILT of L. euchaeta, C. dorsispinatus, E. concinna and C. sinicus were 30.1℃, 29.5℃, 28.6℃ and 27.3℃, respectively. Differences of thermal sensitivity between these animals were all significant.

Key words: upper incipient lethal temperature (UILT), heating rate, Calanus sinicus, Labidocera euchaeta, Euchaeta con-cinna, Centropages dorsispinatus, thermal tolerance, thermal discharge