摘要
采捕野生拟目乌贼进行室内培育,利用显微成像系统观察其胚胎发育过程。结果表明,拟目乌贼受精卵乳白色,半透明,呈椭圆形,乳头状,一端呈圆环状套住附卵基质,如葡萄般成串有规律地聚集一起。刚产出的受精卵长径为(39.7±1.7)mm,短径为(17.1±1.1)mm,体质量为(4.3±0.2)g。胚胎呈椭圆形,长径(8.85±0.41)mm,短径为(7.74±0.54)mm。在水温为27℃,盐度为30条件下,孵化第10天卵粒变得最小,长径为(27.2±0.6)mm,短径为(13.3±0.6)mm,体质量为(2.02±0.02)g。第11天后受精卵开始膨大,孵化前受精卵长径为(32.7±0.8)mm,短径为(19.3±0.6)mm,体质量为(4.68±0.02)g。胚胎发育分为11个阶段:受精卵期、卵裂期、囊胚期、原肠胚期、胚体形成期、器官形成期、红珠期、心跳出现期、色素出现期、内骨骼形成期和孵化期。胚胎发育历时20 d,初孵乌贼胴长(8.1±0.2)mm,胴宽(6.1±0.2)mm,体质量(0.18±0.02)g。
We collected wild Sepia lycidas to cultivate indoors, and observed the embryonic development by using microscopic imaging system. The results showed that the oosperm was milky, translucent, oval, papillary, and one end of the oosperm which was cylindrical ring-shaped trapped to the spawning substrate, such as grape-like gathered together regularly. The length of the primiparous oosperm was（39.7 ± 1.7 ） mm in long diameter and（ 17.1 ± 1. 1 ） mm in short diameter, the weight was （4.3 ± 0.2） g. The embryo was oval-shaped with long diameter of（8.85 ± 0.41 ） mm and short diameter of（7.74 ± 0.54） mm. When the water temperature was 27 ℃, salinity was 30, the oosperm became the smallest with long diameter of （27.2 ±0.6）mm and short diameter of（ 13.3±0.6） mm,and weight was（2.02 ±0.02） g on the 10th day. After 11 days,the oosperm began to expand. Before hatching,the oosperm became larger with long diameter of（ 32.7 ± 0.8 ） mm and short diameter of（ 19.3 ± 0.6） ram, and weight was （4.68 ± 0.02） g. The embryonic development was compartmentalized into 11 periods, such as oosperm, cleavage, blastula, gastrula, the occurrence of embryonic primodium,the formation of organization, red-bead stage, occurrence of heartbeat, pigment appearance,endoskeleton formation stage,hatching. The embryonic development lasted 20 days, the length and width of mantle and weight of hatchling larva were （8. 1 ± 0.2） mm, （6. 1 ± 0.2） mm and （ 0.18 ± 0.02 ） g, respectively.
出处
《水产学报》
CAS
CSCD
北大核心
2013年第5期711-718,共8页
Journal of Fisheries of China
基金
宁波市科技重点项目(2011C11002)
关键词
拟目乌贼
受精卵
胚胎发育
Sepia lycidas
oosperm
embryonic development
