The unusual life history of a southern Iberian Peninsula population of Torleya major （Ephemeroptera： Ephemerellidae）  

作　　者：M. J. Lopez-Rodriguez J. M. Tierno de Figueroa J. Alba-Tercedor 

机构地区：[1]Departamento de Biologia Animal, Facultad de Ciencias, Universidad de Granada, Granada, Spain

出　　处：《Insect Science》2011年第5期583-589,共7页昆虫科学（英文版）

摘　　要：The nymphal biology of a population of Torleya major （Klapalek） in southem Iberian Peninsula was studied. An atypical life cycle pattern is described, with eggs hatching in August producing a fast-developing cohort with adults emerging in autumn and a second slow-developing cohort with adults emerging in spring of the following year. Nymphal growth occurred primarily in summer-autumn （in the first cohort） and in spring （in the second）. The origin of such a life history is discussed. Nymphs were collector-gatherers, consuming mainly detritus. Although ontogenetic shifts on the use of trophic resources were detected, similar food was utilized during the months when both cohorts cohabited, eliminating the possibility that the rapid growth of the first cohort could be related to the utilization of different food resources.The nymphal biology of a population of Torleya major （Klapalek） in southem Iberian Peninsula was studied. An atypical life cycle pattern is described, with eggs hatching in August producing a fast-developing cohort with adults emerging in autumn and a second slow-developing cohort with adults emerging in spring of the following year. Nymphal growth occurred primarily in summer-autumn （in the first cohort） and in spring （in the second）. The origin of such a life history is discussed. Nymphs were collector-gatherers, consuming mainly detritus. Although ontogenetic shifts on the use of trophic resources were detected, similar food was utilized during the months when both cohorts cohabited, eliminating the possibility that the rapid growth of the first cohort could be related to the utilization of different food resources.

关 键 词：collector-gatherer life cycle MAYFLY nymphal feeding southern Iberian Peninsula 

分 类 号：Q969.21[生物学—昆虫学] X24[环境科学与工程—环境科学]