ECOLOGICAL DIFFERENCES AMONG CLONES OF DAPHNIA-PULEX LEYDIG
ECOLOGICAL DIFFERENCES AMONG CLONES OF DAPHNIA-PULEX LEYDIG
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DOI：
10.1007/bf00540595
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发表时间：
1981-01-01
期刊：
影响因子：
2.7
通讯作者：
HEBERT, PDN
中科院分区：
文献类型：
--
作者：
LOARING, JM;HEBERT, PDN
Natural populations of D. pulex that reproduce by obligate parthenogenesis include a number of clones. Studies on 2 common and 2 rare clones from southwestern Ontario [Canada] revealed significant differences in their intrinsic rates of increase, competitive abilities, rates of ephippial egg production and life-spans. Environmental factors such as temperature and food type had large influences on the rate of increase of each clone. Differences in rates of increase among clones were most pronounced at temperatures higher than those encountered in nature. The covariance of life history traits among clones was high. The outcome of competitive encounters between clones was deterministic and in most cases was unaffected by temperature. Clones with high rates of increase tended to be better competitors than those with low rates of increase.
