【摘要】 <正> 赤鼻棱鲤Thrissa kammalensis(Bleeker)和中颌棱鳇Thrissa mystax(Block & Schnei-der)是广泛分布在我国沿海和印度—西太平洋海区的小型中上层鲤科(Engraulidae)鱼类。在胶州湾内,赤鼻棱鳇产卵季节为5至8月中旬(水温12—28℃),以5月下旬和6月为盛期。中颌棱鳃为6月至8月下旬(水温为15—28℃),以7月为盛期。关于它们的早期发育还未见有较详细的报道。Delsman(1929)作过棱鲲属卵及仔鱼的简单描述,但没有确定种的特征。更多还原

【Abstract】 This paper presents the results of the observations on the developments of the eggs and larvae of the Thrissa kammalensis and I.mystax.The eggs were obtained from Jiaoehou Bay by plankton net.The hatched larvae were reared in laboratory until completion of metamorphosis.The eggs of both species are globular in shape,buoyant,eggs membranes smooth and without special structure,and yolk segmented.During the course of the development of the eggs no pigment appeared.The egg diameter of T.kammalensis is 1.06-1.32 mm.with a single oil globule measuring 0.13-0.18 mm.and perivitelline space is narrow.The egg diameter of T.mystax is quite similar to that of T.kammalensis,but without oil globule and perivitelline space wider.The larvae of these two species closely resemble each other.However,there are some characteristics to distinguish them.更多还原