广西红树林区有孔团水虱的卵子发生

摸清有孔团水虱的繁殖特性，对团水虱的防控和消杀，以及保护红树林生态系统具有重要意义。本研究采用组织切片技术，研究广西红树林区有孔团水虱的卵子发生过程，探讨其繁殖期时间。结果表明，有孔团水虱的卵子发生过程可分为4个时期，分别是卵原细胞、无卵黄卵母细胞、卵黄发生卵母细胞和成熟期卵母细胞。其中：无卵黄卵母细胞又可分为前期、中期和后期3个亚期；卵黄发生卵母细胞可分为卵黄开始沉积时相和卵黄充满时相2个亚期。受精后发育的胚胎存在于母体内。周年调查表明：有孔团水虱雌性体内全年存在着各时期的卵母细胞或胚胎；2-3月无成熟期卵母细胞或胚胎出现。结合全年各期卵母细胞分布以及胚胎和幼体情况判断，广西红树林区有孔团水虱的繁殖期为每年的4月至次年的1月。

Oogenesis of Sphaeroma terebrans in Guangxi Mangrove Area

It is of great significance to understand the reproductive characteristics of Sphaeroma terebrans for controlling and killing S. terebrans and protecting mangrove ecosystems. In this study, tissue slice technique was used to study the oogenesis process of S. terebrans in mangrove area of Guangxi, and its reproductive period was discussed. The results showed that the oogenetic process of S. terebrans could be divided into 4 stages:Oogonium, alecithic oocyte, vitellogenic oocyte and mature oocyte. The alecithic oocyte could be divided into 3 sub-stages:Prophase of alecithic oocyte, metaphase of alecithic oocyte and anaphase of alecithic oocyte. The vitellogenic oocyte could be divided into 2 sub-stages:The initial yolk deposition stage and the yolk filling stage. Embryos after fertilization exist in the body of female S. terebrans. The annual survey showed that there were oocytes or embryos in the female of S. terebrans at various stages throughout the year, however, no mature oocytes or embryos appeared from February to March. According to the distribution of oocytes and embryo and larva in each stage of the year, the breeding season of S. terebrans in Guangxi mangrove area was from April to January of the next year.