橙腹田鼠中延缓性密度依赖效应和种群波动(英文)  

Delayed density-dependent effects and population fluctuations in the prairie vole Microtus ochrogaster

作　　者：Lowell L.GETZ Laura E.SIMMS Joyce E.HOFMANN Betty McGUIRE 

机构地区：[1]Department of Animal Biology,University of Illinois, 505 S.Goodwin Ave, Urb ana,Department of Physics,Augsburg College,2211 Riverside Ave, Minneapolis,Illinois Natural History Survey, 607 E. Peabody Dr., Champaign,Department of Biological Sciences, Smith College, Northampton IL61801,USA,MN 55406,USA,IL81820,USA,MA01063 USA.

出　　处：《动物学报》2004年第1期1-8,共8页ACTA ZOOLOGICA SINICA

基　　金：ThestudywasfundedinpartbygrantsNSFDEB7825864andNIHHD09328andbytheUniversityofIllinoisSchoolofLifeSciencesandGraduateCollegeResearchBoard

摘　　要：检验了延迟的密度依赖对橙腹田鼠 (Microtusochrogaster)一个波动种群的生存和生殖的影响 ,研究持续了 63个月 ,取样间隔为 3 5天。在研究期间 ,该种群的密度经历了 4次波动 ,每次波动的高峰都在 11月至次年 1月 ,种群数量在冬季下降。生存和生殖都有负面的密度依赖效应 ,最大效应具有 2个月的时滞。种群存活率增长对种群密度最大的正面效应具有 2个月的时滞 ,而对与增加生殖则有 3个月的时滞。内部因素和冬季都可能推延对生殖的密度依赖效应 ,但是本文未能检验这些内部因素的影响。季节性影响看来与对生存的延缓性密度依赖效应无关。负面的延缓性密度依赖效应对生存和生殖的净作用可能在于减少。We tested for delayed density-dependent effects on survival and reprod uction in a fluctuating population of the prairie vole Microtus ochrogaster monitored at 3 5-day intervals for 63 months. The population underwent four fluctuations in density during the study; all peaked November-January, with wi n ter declines. Survival and reproduction displayed negative density-dependent e f fects, with an approximate 2-month lag time for maximum effects. There was a 2 - month lag for maximum positive effects of increased survival on population densi ty and a 3-month lag in respect to increased reproduction. Extrinsic factors, w inter, may have been involved in the delayed density-dependent effects on repro d uction, but we could not test for role of intrinsic factors. Seasonal effects d id not appear to be responsible for the delayed density-dependent effects on su rvival. The net effect of the negative delayed density-dependent effects on su rvival and reproduction are suggested to moderate amplitudes, but not prevent, p opulation fluctuations of M ochrogaster

关 键 词：橙腹田鼠 密度依赖效应 种群波动 种群存活率 

分 类 号：S443[农业科学—农业昆虫与害虫防治]