We trapped deer mice in Algonquin Park, Ontario, Canada, over a 36-year period. Using information-theoretic methods, we examined relationships among weather variables, sugar maple seed crops, and mouse populations. Deer mouse populations were naturally regulated with stochastic variation in growth rate from year to year influenced strongly by autumn seed crops mediated by temperature during the previous summer and snowfall during the previous winter. Population peaks followed heavy seed crops but did not occur at regular intervals. Demographic characteristics differed between peak and nonpeak populations. Overwinter losses were considerably less entering peak years than in other years. Although overwintered adults were only slightly more numerous in the spring of peak years, they were heavier than in nonpeak years. Breeding began earlier in peak years and in years with high March temperatures. The proportion of young was greater in the spring of peak years but less than in nonpeak years in summer. Apparent survival was greatest in spring and early summer of peak years. Immigration in summer was also greatest in peak years. A combination of the above factors resulted in rapid population growth in spring and early summer of peak years. However, young grew slowly in peak summers and most did not reach breeding mass in contrast to nonpeak years. Breeding was drastically reduced for all sex and age groups in August and September of peak years but continued all summer in nonpeak years. Intensity of late summer breeding was positiv...
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Climate change Research Articles published between Aug 08, 2022 to Aug 14, 2022
Aug 15, 2022
Articles Included: 5
Introduction: There is no consensus on the policies that should be seen as implicitly pricing carbon (see World Bank (2019a) for a discussion). The OE...Read More
Gender Equality Research Articles published between Aug 08, 2022 to Aug 14, 2022
Aug 15, 2022
Articles Included: 4
I would like to thank Anna Khakee, Federica Zardo and Ragnar Weilandt for their very useful comments as well as the participants of the workshop of 21...Read More
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