湖泊科学2011，Vol.23Issue(3)：479-482,4.
温度对发头裸腹溞(Moina irrasa)种群动态和两性生殖的影响
Effect of temperature on population dynamic and sexual reproduction of Moina irrasa
摘要
Abstract
Population dynamics and sexual reproduction of Moina irrasa were studied under four temperatures ( 15,20, 25, 30℃ )and food concentrations of 4 × 105 cells/ml. The results showed that population density of M. irrasa presented a trend of gradual increase at first stage and decreased after it reached the density peak under four temperatures. With the increase of temperature, mature time, first reproduction time and the time reaching maximal population density declined, while body length of mother at mature and first offspring-produced decreased. In addition, the maximal population density of M. irrasa increased with increasing temperatures except 30℃. Mean maximal population densities of M. irrasa were 882 ± 136ind./(200ml), 1351 ± 141ind./(200ml),1643 ± 105ind. / ( 200ml ), 1226 ± 82ind. / (200ml) under four temperatures, respectively. The males and ephippia of M. irrasa were observed in all experimental groups, and male density increased with the incease of population density. The maximal male density and accumulative number of ephippia of M. irrasa occurred at 25℃, i.e. 169ind./(200ml) and 1444ind./(200ml).Relationship between temperature and the number of ephippia of M. irrasa was observed. Our results suggested that extreme temperature was not good for population growth of M. irrasa, and the formation of ephippia of M. irrasa was affected by temperature,food and population density together.关键词
发头裸腹潘/温度/种群动态/卵鞍/雄体Key words
Moina irrasa/ temperature/ population density/ ephippium/ male引用本文复制引用
张赛,邓道贵,李玉颖,孟小丽,任盼盼,雷娟,金显文..温度对发头裸腹溞(Moina irrasa)种群动态和两性生殖的影响[J].湖泊科学,2011,23(3):479-482,4.基金项目
国家自然科学基金项目(30840025,31070387)和安徽省教育厅自然科学研究项目(KJ2008B059,KJ2010A300,KJ2009B251Z)联合资助. （30840025,31070387）
