扁玉螺的生殖腺组织学和生殖周期

HISTOLOGY OF GONAD AND REPRODUCTIVE CYCLE OF NEVERITA DIDYMA

采用组织切片和HE染色法,对烟台沿海扁玉螺的生殖腺发育过程进行了观察。根据性腺发育的组织学特征,将扁玉螺生殖腺发育过程分为增殖期、生长期、成熟期、排放期和休止期5个时期;扁玉螺在烟台沿海每年一个生殖周期,繁殖季节为5月上旬至8月中旬,繁殖盛期为6月上旬至7月下旬。上述研究结果探明了扁玉螺的生殖腺发育规律,丰富了扁玉螺的繁殖生物学资料,对开发利用扁玉螺有着积极的意义。

The gonad development of the Neverita didyma from Yantai sea area was observed by using the tissue slice and H. E. coloration technique. According to the histological character, the gonad development of Neverita didyma may be divided into the following five stages： proliferating stage, growing stage, maturing stage, spawning stage and recovering stage. The reproductive cycle of Neverita didyma is once a year in the Yantai sea area. The spawning season starts from the early of May to the middle of August, their spawning peak is from the early of June to the end of July. The results proved the laws of gonad development, supplemented data of reproductive biology of Neverita didyma, and have active significance for exploitation and utilization of Neverita didyma.