Hartenstein Roy, Neuhauser Edward F, Kaplan David L
School of Biology, Chemistry and Ecology, State University of New York, College of Environmental Science and Forestry, 13210, Syracuse, New York, USA.
Oecologia. 1979 Dec;43(3):329-340. doi: 10.1007/BF00344959.
Regression equations are provided for the earthworm Eisenia foetida with respect to age at which 50% of the population became clitellate at 25° C in relation to population density in activated sludge and in horse manure. Regression equations are provided for progeny per cocoon versus weight of cocoon, and weight of cocoon in relation to weight of parent; from these an equation is derived for progeny per cocoon relative to worm weight. Regression equations are given on (a) number of cocoons produced per adult in relation to age and population density from onset of adulthood to median peak production of cocoons, age 10 weeks, and from age 10 weeks to age 27 weeks, and (b) weight of worm in relation to population density and age between ages 5 and 27 weeks. From (a) and (b) a family of equations (c) are derived giving progeny per cocoon in relation to age of adult and population density. From equations (a) and (c) two families of equations are generated giving progeny per adult in relation to ascent to, and descent from, the median week of peak cocoon production in relation to population density. Data also are provided on age at which reproduction terminates in relation to population density, optimum population density for reproduction, and hatchability.
针对赤子爱胜蚓给出了回归方程，这些方程涉及在25℃时50%的种群形成环带的年龄与活性污泥和马粪中种群密度的关系。给出了每个茧的后代数量与茧重量、茧重量与亲体重量的回归方程；由此推导出每个茧的后代数量相对于蚯蚓重量的方程。给出了关于以下方面的回归方程：(a)从成年开始到茧产量中位数峰值（10周龄）以及从10周龄到27周龄，每个成虫产生的茧数量与年龄和种群密度的关系；(b)5至27周龄之间蚯蚓重量与种群密度和年龄的关系。由(a)和(b)推导出一组方程(c)，给出每个茧的后代数量与成虫年龄和种群密度的关系。由方程(a)和(c)生成两组方程，给出每个成虫的后代数量与茧产量中位数峰值的上升和下降（相对于种群密度）的关系。还提供了关于繁殖终止年龄与种群密度、繁殖的最佳种群密度以及孵化率的数据。
