【摘要】 观察了室内培育的条纹斑竹鲨自然生产的受精卵形态和胚胎发育过程。结果表明,条纹斑竹鲨受精卵个体较大,卵黄略呈椭圆形,长径为25.91~36.16 mm,短径为13.56~19.44mm。受精卵外裹有棕褐色的卵鞘,鞘长75.25~107.30 mm,鞘宽33.39~47.70 mm,鞘厚15.82~24.65 mm,卵鞘坚韧而略有弹性。在水温28.0℃、盐度26.2~28.8条件下,受精卵经65~80 d发育孵出幼鱼,胚胎发育分为23期,参照硬骨鱼类胚胎发育各期名称给予命名。初孵幼鱼全长121.82~166.80 mm,体重5.30~18.22 g,已具成鱼的外形特征,但体内尚存卵黄,体外卵黄少许或消失。胚体长度(L/mm)与孵化时间(D/d)呈线性相关,L=2.136 8D-11.175(R=0.986 2);胚体重(M/mg)与孵化时间(D/d)呈幂函数关系,M=0.000 1D4.376 3(R2=0.957 9);胚体重(M/mg)与胚体长度(L/mm)呈幂函数关系,M=0.000 5L3.427 8(R2=0.982 2)。更多还原

【Abstract】 Studies on the eggs and embryonic development of Chiloscyllium plagiosum showed that the eggs were big,the egg yolks were oval,with the longer diameter of 25.91-36.16 mm and the short diameter of 13.56-19.44 mm.The eggs covered by brown,leathery with a little malleable,and opaque external shell with the longer diameter of 75.25-107.30 mm,the short diameter of 33.39-47.70 mm and the thickness of 15.82-24.65 mm.Under water temperature of 28.0 ℃ and salinity of 26.2-28.8,the young fish hatched between 65 and 80 d after deposition.The embryonic development of Chiloscyllium plagiosum was divided into 23 stages with suitable names.The toal length of the newly hatched young were 121.82-166.80 mm,while the body mass were 5.30-18.22 g.The yolk remained just a little or nothing at all out of the body,but there were yolk inside the body.They had the figure of the adult fish.There was a significant linear correlation between toal length(L /mm)and incubation time(D /d): L=2.136 8D-11.175(R = 0.986 2),while a significant curvy correlation between body mass(M /mg)and the accumulative time(D /d): M =0.000 1 D 4.376 3(R 2 = 0.957 9).The curve between body mass(M /mg)and toal length(L /mm)was fitted by M =0.000 5 L 3.427 8(R 2 = 0.982 2).更多还原