| adaptions in the life cycle of dermacentor variabilis (say) and ixodes dammini (spielman, clifford, piesman, and corwin) marginal populations (acari: ixodidae). | both the dermacentor variabilis and ixodes dammini adult diapause seasons are followed by a breeding period. at the edge of the ticks' range, where diapause and breeding occur under adverse climatic conditions, the species still conserves its fixed response for the onset of diapause. as a result, most of the following breeding effort is wasted; the population can only be maintained by an aberrant breeding period during the normal diapause season. when the diapause and breeding periods are suitab ... | 1985 | 3916750 |