| 引用本文: | 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.湖泊科学,2011,23(3):479-482. DOI:10.18307/2011.0323 |
| ZHANG Sai,DENG Daogui,LI Yuying,MENG Xiaoli,REN Panpan,LEI Juan,JIN Xianwen.Effect of temperature on population dynamic and sexual reproduction of Moina irrasa. J. Lake Sci.2011,23(3):479-482. DOI:10.18307/2011.0323 |
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| 温度对发头裸腹溞(Moina irrasa)种群动态和两性生殖的影响 |
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张赛, 邓道贵, 李玉颖, 孟小丽, 任盼盼, 雷娟, 金显文
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淮北师范大学生命科学学院资源植物生物学安徽省重点实验室, 淮北 235000
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| 摘要: |
| 在食物浓度为4×105cells/ml栅藻的条件下,研究了4种温度(15、20、25、30℃)对发头裸腹溞种群动态及两性生殖的影响.结果表明,在4种温度下,发头裸腹溞种群密度在实验初期逐渐增大,达到密度最大值后呈现下降的趋势.随着温度的升高,发头裸腹溞成熟时间、首次产幼溞时间以及达到最大种群密度所需时间均缩短,但母溞成熟时的体长及首次所产幼溞体长则呈缩短的趋势.除30℃外,随着温度的升高,发头裸腹溞最大种群密度依次增大.4种温度下,发头裸腹溞的平均最大种群密度分别是882±136ind./(200ml)、1351±141ind./(200ml)、1643±105ind./(200ml)和1226±82ind./(200ml).发头裸腹溞在所有实验组均产生雄体及卵鞍,且雄体密度随种群密度的增加而增大.发头裸腹溞平均最大雄体密度和最大累积卵鞍数均出现在25℃,分别为169ind./(200ml)和1444ind./(200ml).研究表明温度过高或过低都不利于发头裸腹溞的种群增长,且发头裸腹溞的卵鞍形成倾向于受温度、食物和种群密度的共同影响. |
| 关键词: 发头裸腹溞 温度 种群动态 卵鞍 雄体 |
| DOI：10.18307/2011.0323 |
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| 基金项目:国家自然科学基金项目(30840025,31070387);安徽省教育厅自然科学研究项目(KJ2008B059,KJ2010A300,KJ2009B251Z)联合资助 |
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| Effect of temperature on population dynamic and sexual reproduction of Moina irrasa |
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ZHANG Sai, DENG Daogui, LI Yuying, MENG Xiaoli, REN Panpan, LEI Juan, JIN Xianwen
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Anhui Key Laboratory of Resource and Plant Biology, School of Life Science, Huaibei Normal University, Huaibei 235000, P. R. China
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| 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 off spring-produced decreased. In addition, the maximal population density of M. irrasa increased with increasing temperatures except 30℃. Mean maximal population densities of Moina irrasa were 882 ± 136ind./(200ml), 1351 ± 141 ind./(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. |
| Key words: Moina irrasa temperature population density ephippium male |
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