厦门港海区两种常见纺锤水蚤卵的生物学和季节演替

Studies on The Egg Biology and Seasonal Succession of TwoCommon Species of Acartia From Xiamen Waters

研究了厦门港海区太平洋纺锤水蚤和刺尾纺锤水蚤卵的形态、孵化、生产的节律性以及底泥中的卵，从而提出了该海区这两种纺锤水蚤季节演替的模式：太平洋纺锤水蚤主要出现在冬春季，到春末夏初开始产休眠卵，休眠卵沉入海底被埋入海泥并间续孵化以补充种群。到了下一个冬季，休眠卵的生产停止，种群数量得到恢复。刺尾纺锤水蚤仅出现在夏秋季，在秋末冬初产一种不能正常卵化的卵，所以很快就被太平洋纺锤水蚤所取代。

After studying on the forms,hatching,production rhythm of eggs and egss in thesea-bottom muds which produced by Acartia spinicaua and A. pacifica living in Xiamen waters,theseasonal succession model of these two Acartia species in Xiamien waters is suggested: A. pacifica isdominant in the winter and spring. In the late spruig and early summer it produces diapause eggswhich sink into sea bottom and bury in the muds and hatch continually to recruit its population. Thisis why is appears year-round in Xiamen waters,but its population quantity is decreased in summer andautumn. The population quantity is resumed in the next winter since the diapause egg production isceased.A. spinicauda occurs only in summer and autumn. Because it produces one kind of egg in thelate autumn and early winter which could not hatch properly,it is soon replaced by A. pacifica.