环境因子对萼花臂尾轮虫休眠卵萌发率的影响  

EFFECTS OF ENVIRONMENTAL FACTORS ON THE HATCHING RATE OF RESTING EGGS OF BRACHIONUS CALYCIFLORUS (ROTATORIA: MONOGONONTA)

作　　者：杨家新[1] 黄祥飞[2] 

机构地区：[1]南京师范大学,南京21009 [2]中国科学院水生生物研究所,武汉430072

出　　处：《水生生物学报》2000年第4期331-339,共9页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金!(批准号3927009)

摘　　要：萼花臂尾轮虫（Ｂｒａｃｈｉｏｎｕｓ ｃａｌｙｃｉｆｌｏｒｕｓ Ｐａｌｌａｓ）休眠卵在不同萌发条件下累积萌发率的结果显示：保存在休眠卵形成的原液中，温度为２０℃－３０℃时萌发率均较高，３０℃时用过滤湖水萌发时的萌发率最高（６５％）；保存在无机培养液中的休眠卵，用曝气自来水萌发时最高，用湖水次之，无机液萌发效果较差２０℃和２５℃时三种萌发液中的萌发率接近；母体投喂小球藻形成的休眠卵的累积萌发率高于投喂混合藻组，且以过滤湖水为孵化液时效果较佳；累积萌发率与光照时间的长短并无直接关系（Ｐ＞０．０５）；休眠卵在５℃、无光、缺氧贮存２０一６０ｄ时的平均萌发率在４５．００％—５４．２５％之间。The accumulative hatching rate of resting eggs (RE) of rotifer Brachionus calyciflorus was observed under different environmental conditions. The rates of RE stored in medium where they were formed were higher at temperature varying from 20℃ to 30℃ and the highest rate was observed when RE hatched in aerated tap water at 30℃. The rate of RE stored in rotifer culturing medium was highest when hatching in aerated tap water. In contrast the lowest was found in rotifer culturing medium. At 20℃ and 25℃, the rates were similar as in tap water, culturing medium and in filtrated lake water. The rate of RE produced by rotifer fed on green algae chlorella was higher than that produced by rotifer fed on mixed algae. The accumulative rate was not associated with photoperiod. The rates were in range of 45 to 54.2% when stored in dark for 20 to 60 days at 5℃.

关 键 词：萼花臂尾轮虫 休眠卵 萌发率 温度 光照 

分 类 号：Q959.181[生物学—动物学]