Nakamura Kazuo, Itô Yosiaki, Nakamura Masako, Matsumoto Tadao, Hayakawa Katsusuke
Division of Entomology, National Institute of Agricultural Sciences, Kita-ku, Tokyo, Japan.
Department of Biology, Tokyo Metropolitan University, Setagaya-ku, Tokyo, Japan.
Oecologia. 1971 Mar;7(1):1-15. doi: 10.1007/BF00346291.
To assess the population productivity of the grasshopper Parapleurus alliaceus Germar in a Miscanthus sinensis Anders. grassland, estimates of population density, survival, and dilution rates were attempted using the mark-release-recapture method. No significant departure from the random-catch hypothesis, which is the basic pre-requisite for the estimation of population parameters, was discovered. A comparison between the results of two experiments, attempted simultaneously in the same area of the grassland, indicated that the accuracy of the mark-release-recapture method was acceptable for our purpose. The population trends in 1968 and 1969 showed that mortality during the early nymphal instars was remarkably low (75% and 62%, respectively, for the period from the second instar nymph to adult), and that adult longevity was greater than 10 days. The number of nymphs hatched in 1969 was smaller than 1968, and the cause of this reduction was thought to be the predation of eggs during autumn and winter.
为了评估中华结缕草草地中蒜黄牧草蝗（Parapleurus alliaceus Germar）的种群生产力，尝试采用标记重捕法来估计种群密度、存活率和稀释率。未发现与随机捕获假设（这是估计种群参数的基本前提条件）有显著偏差。在草地同一区域同时进行的两项实验结果比较表明，标记重捕法的准确性对于我们的目的来说是可以接受的。1968年和1969年的种群趋势表明，若虫早期龄期的死亡率极低（从第二龄若虫到成虫阶段，分别为75%和62%），且成虫寿命超过10天。1969年孵化的若虫数量比1968年少，这种减少的原因被认为是秋冬季节卵被捕食。
