Development of Neritie Copepods Acartia clausi and A. steueri : II. Isochronal Larval Development at Various Temperatures
内湾性橈脚類Acartia clausiとA.steueriの発生 : II. 等時生長
Isochronal development is a general feature in stage succession of neritic copepods Acartia clausi and A. steueri, when they are cultured at optimal temperatures with excess food. However, stage duration of NI is shorter and of NII is compensatingly longer than the other later stages which are almost equal in time. The time required from egg-laying to reach any developmental stage at a given temperature can be calculated from the Bělehrádek equation by proper multiplication of proportional constant for embryonic development at that temperature. Isochronal development may be more advantageous than nonisochronal development for some species of the genus Acartia to ensure high reproductive potential of the population by reducing the mortality during copepodite stages.
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Copyright (c) 1980 The Plankton Society of Japan
Graduate School of Biosphere Science