Seasonal reproductive biology of Centropages tenuiremis (copepoda) in Xiamen waters, People's Republic of China

The egg production rate (EPR) and the effects of environmental variations on diapause induction in the copepod Centropages tenuiremis in Xiamen waters were studied in 2002 and 2003. The EPR ranged from 7.33 ± 8.14 (on 18 February 2003) to 91.08 ± 20.61 (on 6 June 2003) eggs female−1day−1 (mean ± 95%...

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Bibliographic Details
Published in:Journal of plankton research 2007-05, Vol.29 (5), p.437-446
Main Authors: Wu, Li-Sheng, Wang, Gui-Zhong, Jiang, Xiao-Dong, Li, Shao-Jing
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Aquatic crustaceans
Biological and medical sciences
Biology
Centropages
Centropages tenuiremis
Chlorophyll
Chlorophylls
Copepoda
Crustacea
Diapause
Diapause induction
Egg production
Eggs
Females
Fundamental and applied biological sciences. Psychology
General aspects
Invertebrates
Multivariate analysis
Photoperiods
Plankton
Sea water
Seasonal variations
Seasons
Sediments
Survival
Synecology
Temperature
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Summary:The egg production rate (EPR) and the effects of environmental variations on diapause induction in the copepod Centropages tenuiremis in Xiamen waters were studied in 2002 and 2003. The EPR ranged from 7.33 ± 8.14 (on 18 February 2003) to 91.08 ± 20.61 (on 6 June 2003) eggs female−1day−1 (mean ± 95% confidence limits), and displayed a significant seasonal pattern. Before the period of maximum egg production, EPR increased with seawater temperature and chlorophyll a concentration; but after the maximum, no significant relationship was found between EPR and chlorophyll a concentration, and there was a negative linear relationship between EPR and temperature. Seawater temperature and photoperiod, respectively, played a primary role in the switch to diapause egg production by the females as shown by single-factor probit analysis. However, the difference in effect between the two factors was demonstrated by binary logistic multivariate analysis. These results suggest that this copepod rapidly increases subitaneous EPR by taking full advantage of conditions in favorable seasons (winter and spring). Subitaneous EPR decreases and there is a switch to the production of diapause eggs that survive in the bottom sediments during unfavorable seasons (summer and autumn) in Xiamen waters.
ISSN:0142-7873
1464-3774
DOI:10.1093/plankt/fbm028