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Aquatic Insects
International Journal of Freshwater Entomology
Volume 42, 2021 - Issue 1
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Research Article

Life history of Caenis lubrica Tong and Dudgeon, 2002 (Ephemeroptera: Caenidae) in a Three Gorges Reservoir feeder stream, subtropical Central China

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Pages 50-61 | Received 16 Apr 2019, Accepted 15 Dec 2020, Published online: 13 Jan 2021
 

Abstract

Life history of Caenis lubrica Tong and Dudgeon, Citation2002 (Ephemeroptera: Caenidae) was studied for the first time. We investigated it in Pangxie Stream, which feeds into the Xiangxi River Bay, Three Gorges Reservoir in subtropical Central China. Monthly samples of larvae were taken from January to December, 2017. Caenis lubrica was determined to exhibit trivoltinism in this system, having an overwintering generation and two summer generations. The cohort production interval (CPI) of the overwintering generation was six months, from November to April, and the CPIs of the two summer generations were one month each, from June to July and from July to August. The Accumulated Degree Days of C. lubrica for larval development of the overwintering generation and the two summer generations were estimated to be 1829.24 °C, 904.84 °C, and 859.83 °C, respectively.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This research was funded by National Key R & D Program of China [Grant 2017YFC0506406] and Strategic Pilot Science and Technology Projects (A) Category, Chinese Academy of Science [Grant XDA23040103].

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