Gliwicz Z Maciej, Guisande Castor
Max-Planck-Institut für Limnologie, Postfach 165, W-2320, Plön, Federal Republic of Germany.
Oecologia. 1992 Oct;91(4):463-467. doi: 10.1007/BF00650317.
We observed a shift in maternal investment per offspring in clonal cultures of twoDaphnia species. Mothers grown at high food levels produced large clutches of smaller eggs but their offspring could not survive long under starvation conditions. Genetically identical mothers grown at low food levels produced small cultches of larger eggs, and their offspring, albeit low in numbers, were able to survive long periods of starvation. Our data show thatDaphnia mothers are capable of assessing food level and use this information in adjusting their fractional peroffspring allocation of reproductive resources.
我们观察到两种水蚤克隆培养物中每个后代的母体投资发生了变化。在高食物水平下生长的母体产出大量较小的卵，但它们的后代在饥饿条件下无法长期存活。在低食物水平下生长的基因相同的母体产出少量较大的卵，它们的后代数量虽少，但能够在长期饥饿中存活。我们的数据表明，水蚤母体能够评估食物水平，并利用这些信息来调整其对每个后代生殖资源的分配比例。
