Extinction process of frood-plain Cyprinid,Hemigrammocypris rasborella

对生活在10个不同条件的人工稻田池塘中的河漫滩鲤（Hemigrammocypris rasborella）进行了10年的种群数量估计。在新引进后的第一年，观察到了急剧的人口增长率。明年种群数量的突然减少可能与同类相食有关。但同类相食不会或几乎不会导致特定池塘种群的灭绝，这可能仅仅是由于池塘水的干涸造成的，水道网络的破碎化可能是物种灭绝的主要机制。

Population size estimation of flood-plain Cyprinid(Hemigrammocypris rasborella),living in 10 different condition of artificial rice-field ponds, was made over 10 years. Drastic population growth rate was observed the first year after new introductions. Next year sudden decrease of population size may be related by cannibalism. But cannibalism never or hardly arise extinction of given pond populations, which may be caused by dry-up of pond water only.The fragmentation of water channel network may be the main mechanism of the species extinction.