江黄颡鱼卵细胞膜的结构特征 - 水产学报.pdf

29 3 Vol. 29, No. 3 2005 6 JOURNAL OF FISHERIES OF CHINA J ne, 2005 : 1000- 0615( 2005) 03- 0420- 04 # # 1, 2 2 3 2 刘利平 , 王 武, 袁 华, 张克俭 ( 1. , 266071; 2. , 200090; 3. , 226241) : ; ; ; ; : S917 :A Structural characteristics of egg surface of Pelteobagrus vachelli 1, 2 2 3 2 LIU Li-ping , WANG W , YUAN H a , ZHANG Ke-jian ( 1. Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Aca emy of Sciences, Qing ao 266071, China; 2. College of Aqua-Lfi e Science an Technology, Shanghai Fisheries University, Shanghai 200090, China; 3. Qi ong Ocean an Fishery Bureau, Qi ong 22624 1, China) Abstract: Using conventional histochemical methods and scanning electron microscope, the egg s rface of mat re oocyte of Pelteobagrus vachelli was observed. The micropyle is f nne-l like and consists of micropylar vestib le and micropylar canal. The opening of micropylar vestib le is abo t 11. 35Lm in diameter while entrance of the micropyle to the oocyte is only abo t 2. 6 Lm. There are plenty of micropores on the s rface near the micropyle. Micropyle might act as an apparat s leading spermatozoa to penetrating an oocyte. Reg lar cord-like str ct res between basal membrane ( the o termost layer of egg s rface) and plasmic membrane ( the inner layer of egg s rface) are fo nd. These cord-like str ct res, each abo t 16.75 to 18. 50 Lm in length, 5Lm in diameter, c