Morphometrics Development of Ovoviviparous Sebastes Schlegeli Hilgendorf Larvae and Juvenile

LIN Yuzhen; YU Daode; WEN Haishen; LI Jifang; MU Weijie; LIU Qun; ZHAO Junli; REN Yuanyuan; and ZHANG Yachen

Abstract：In this paper it is reveals the post-embryonic organization development of Sebastes schlegeli Hilgendorf in detail,the result shows that:0dph fry,the total length (TL)is 3.8~4.7mm,the oil ball is big and clear;1dph fry (initial hatch fry),TL is 5.0 ~ 6.5 mm,the fry’s mouth has been open,and not feeding,melanin only distributes on the surface;2dph,the fry start feeding Rotifer,the maw has gas,and rainbow color element emerges;3dph fry,a bundle pigment appears on the rear brain case,and the tail radiation silk appears,the food consumption increases greatly;4dph,fry,yolk sac has been absorbed,spotted yellow pigment begins to differentiate at the back of head and the top of ab-dominal cavity;5dph,pectoral fin vertically spreads outward,jaw opens frequently.12dph,the fry is clustered and phototropic;20dph,the front part of the fish is black,the fish disperses evenly in water, feeding exuberant;25dph,TL is 6.55~8.42mm,black stripe mark begins to appear in front part of the fish;30dph,on the edge of the head eye,there is a horizontal belt,three dark brown horizontal stripes appear at the fish body side;40dph,TL is 15.50~35.55mm,the body shape is similar to the salted fish,there are 6~7 dark brown horizontal stripes at the body side;60dph,the body shape is consistent with the adult,body development goes into the j uvenile stage,and begins to live in the lower water.Based on the morphological observation of ovoviviparous Sebastes schlegeli Hilgendorf in early development,and the embryo,larvae and j uvenile developmental regularity and species specificity,not only can we enrich our understanding of the early life history of the fish,but also instruct the produc-tion and breeding of Sebastes schlegeli Hilgendorf in the future.