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通过对齐氏田中鳑鲏(Tanakia chii)人工授精和培育(22℃恒温环境)阶段早期发育的观察,描述了其仔稚鱼发育形态特征。初孵仔鱼卵黄囊饱满,呈淡黄色,表皮布满微突;3日龄仔鱼卵黄囊两侧向上突起,尾部鳍褶延展变大;6日龄仔鱼眼囊发育;8日龄仔鱼眼囊有黑色素,晶状体形成;11日龄仔鱼口形成,脑开始发育,体上有黑色素出现;15日龄仔鱼鳃沟和肛门形成,背鳍和臀鳍的鳍基出现,尾鳍下叶鳍条形成;21日龄仔鱼头与躯干分界明显,鳔分化为前鳔和后鳔,背部和臀部鳍条数目分别为8和10枚,身体黑色素连接成条带状,虽然残存有卵黄囊,但已经开口并摄食。31-36日龄仔鱼胸鳍呈膜状鳍褶,腹鳍出现鳍条,尾鳍呈深叉形。61-66日龄稚鱼,鳞片出现,体中线后半部具一条黑色素带,稚鱼出现集群游动现象。仔鱼体长的生长呈阶段性:1-26日龄仔鱼生长较为平缓;26-81日龄生长较快。综合21日龄仔鱼卵黄囊残留很少并开口摄食的特征,我们推测在孵化后21日为自然条件下齐氏田中鳑鲏的出蚌时间。同时,仔鱼的感觉、摄食、呼吸和游泳器官在早期阶段快速发育。这些器官在仔鱼的早期快速发育,使出蚌后的仔鱼在最短的时间内获得与早期生存相关的各种能力,提高了出蚌后仔鱼的生存能力。
The morphological characteristics of juvenile larvae were described by aligning the early developmental stages of AI (Tanakia chii) artificial insemination and breeding (22 ℃ constant temperature environment) stage. The newly hatched larvae yolk sac full, pale yellow, epidermis covered with microprojections; 3-day-old yolk sac on both sides of the upward projection, tail fin fold extension becomes larger; 6-day-old laryngeal laryngeal development; 8-day- Melanin and lens formed. At 11th day, larva formed, brain began to develop, melanin appeared on body, gill ditch and anus formed on larvae of 15th day, fin base of dorsal fin and anal fin appeared, and fin of lower caudal fin formed. Aberdeen head and trunk demarcation is obvious, 鳔 differentiation into anterior and posterior 鳔, back and buttocks, the number of rays were 8 and 10, body melanin connected into a ribbon, although the remaining yolk sac, but it has been opening and feeding. 31 - 36-day-old larvae pectoral fins pleated fold, pelvic fins appear, the caudal fin was deep forked. 61 - 66-day-old juveniles, scales appear, the body midline with a melanin in the latter half, juveniles appear cluster swimming phenomenon. The growth of larval body length was in stages: the larvae of 1-26 days old grew more smoothly; the growth of larvae was faster at 26-81 days. Combining the characteristics of yolk sacs with few residues and opening in 21-day-old larvae, we speculated that the hatching time was 21 days after hatching in the natural conditions. At the same time, larval sensation, feeding, breathing and swimming organs developed rapidly in the early stages. The rapid development of these organs in early larvae makes the larvae of mussels gain the various abilities associated with early survival in the shortest time and enhances the viability of larvae after larvae.