| 摘要: |
| 利用1982年采自晋南硝池的蒙古裸腹溞，进行室内培养和观察，研究温度和盐度对其胚胎发育的影响。结果表明：蒙古裸腹溞在20–33℃温度和在5–40盐度条件下的胚胎发育时间为38–97ｈ，胚后发育存在3个幼龄和4–9个成龄，幼龄的龄期均短于成龄；在20–30℃范围内，随温度升高蒙古裸腹溞的胚胎发育时间趋短，幼龄和成龄的龄期以及溞的寿命和最大体长明显降低，30℃后升温对溞发育的影响明显减弱；5–40的盐度对蒙古裸腹溞的胚胎发育时间、胚后发育的龄数和龄期影响均不显著，但该溞在5–10盐度下寿命较长，个体也较大。上述结果显示蒙古裸腹溞发育的最适温度和盐度分别为28℃和10，并且该溞的胚后发育时间相对较西班牙盐水裸腹溞短。 |
| 关键词: 蒙古裸腹溞 发育 温度 盐度 |
| DOI：10.11693/hyhz200001002002 |
| 分类号: |
| 基金项目:国家自然科学基金,38970589 |
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| EFFECTS OF TEMPERATURE AND SALINITY ON DEVELOPMENT OF MOINA MONGOLICA DADDY (CLADOCERA:MOINIDAE) |
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WANG Yan1, HE Zhi-hui2, CAI Yun2
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1.Laboratory of Marine Biology, Shantou University, Chantou, 515063;2.Department of Aquaculture, Dalian Fisheries College, Dalian, 116023
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| Abstract: |
| Effects of temperature and salinity on development of Moina mongolica Daddy, a species recorded from a brackish lake located in arid regions of northern China in 1982 and of potential use as live animal food in larvae culture of marine fish, were evaluated at 20–30°C and 5–40, respectively. Duration of embryonic development of M. mongolica was 38–97 hours, number of instar in post-embryonic development included 3 juvenile instars and 4–9 adult instars, and duration of the juvenile instar were always shorter than the adult instar. Duration of embryonic development, duration of instar, lifespan, and maximal body length of the flea all decreased with increasing temperature from 20°C to 30°C, but no significant difference was detected between 30°C and 33°C. Lifespan and maximal body length of M. mongolica was little greater at 5 and 10 than at 20–40, though effects of salinity on both duration of embryonic development and duration of instar of the flea were similar under 5–40. The results show that optimal temperature and salinity for development of M. mongolica may be 28°C and 10, and duration of post-embryonic development of M. mongolica is shorter than M. salina, a saline cladocera distributed in Spanish coastal sea ponds. |
| Key words: Moina mongolica Daddy, Development, Temperature, Salinity |
