摘要
为了丰富拟目乌贼人工繁育理论,采用组织学方法,对其雌雄生殖系统的结构进行了研究。结果显示,雄性生殖系统可分为精巢、输精管、黏液腺、放射导管腺、中被膜腺、外被膜腺、硬腺、终腺和精荚囊9部分,其中输精管可分为前段、中段(壶腹)和后段3部分。精子发生不同步,成熟精子自精巢产生后,通过输精管,在黏液腺和放射导管腺中形成精团,在中被膜腺和外被膜腺中按规律进行重新排列,硬腺的主要作用是吸水使精荚变硬,最后在终腺中成熟,储存于精荚囊中,在生殖季节分批排出。雌性生殖系统可分为卵巢、输卵管、输卵管腺、1对缠卵腺和1对副缠卵腺5部分,可推测卵子发生不同步,分批成熟,在输卵管腺、缠卵腺和副缠卵腺共同作用下形成三级卵膜结构。拟目乌贼雌雄生殖系统的结构与其受精和产卵方式是相适应的。
Sepia lycidas is a warm-ocean demersal Cephalopoda that inhabits offshore waters at a depth of approximate 15 -100 m, and is mainly distributed from the Indian Ocean to the western Pacific, and few research studies have been reported on this species. In order to enrich theoretical knowledge for the artificial breeding of S. lycidas,the fine structure of reproductive system in male and female S. lycidas was observed by anatomical and histological methods. The results showed that the male reproductive system consists of nine parts,i, e. ： testis, sperm duct, mucilaginous gland, ejaculatory apparatus gland, middle tunic gland, outer tunic gland, hardening gland, finishing gland, and spermatophoric sac. The sperm duct could be further divided into anterior,middle（ampullae） ,and posterior part. The mature spermatozoon produced in the testis and transported by the sperm duct, formed sperm masses in the mucilaginous and ejaculatory apparatus gland, then arranged in a new regular in the middle and outer tunic gland, and turned hard in the hardening gland,and formed mature spematophores in the finishing gland. The mature spematophores stored in the spermatophoric sac,and ejaculated outside by batches in the mating seasons. The female reproductive system consists of five parts,i, e. ： ovary, oviduct, oviduct gland, a pair of nidamental gland, and a pair of subaltern nidamental gland. Oogenesis is asynchronous, and the oocyte matures by batches, forms a tertiary egg envelope by joint action of the oviduct gland, nidamental gland, and subaltern nidamental gland. The male and female reproduction system of S. lycidas is adapted to its manner of fertilization and spawning.
出处
《水产学报》
CAS
CSCD
北大核心
2014年第7期946-955,共10页
Journal of Fisheries of China
基金
国家农转化项目(2009GB2C220415)
浙江省种质种苗项目(浙海渔计2013-82)
宁波市重点科技项目(2011C11002)
关键词
拟目乌贼
雄性
雌性
生殖系统
组织学
Sepia lycidas
male
female
reproductive system
histology
