PERIODICITIES IN THE ANNUAL MUSKRAT POPULATION FIGURES FOR THE PROVINCE OF SASKATCHEWAN
PERIODICITIES IN THE ANNUAL MUSKRAT POPULATION FIGURES FOR THE PROVINCE OF SASKATCHEWAN
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萨斯喀彻温省麝香鼠年度数量的周期性
DOI：
10.1139/z62-104
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发表时间：
1962
影响因子：
1.4
通讯作者：
L. Butler
中科院分区：
文献类型：
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作者：
L. Butler
1915- 1960年萨斯喀彻温省麝鼠皮的年产量呈现出6年的周期性，而不是预期的10年周期。为了检查这些周期的同步性，该省被分为三个部分：南部草原部分，中部白杨格罗夫部分，和北方加拿大地盾部分。在草原部分有两个主要高峰，一个在1923年，另一个在1955年。其余的峰值每隔6年出现一次，其大小相差很大。白杨格罗夫部分的山峰也相隔6年，但幅度相似。北方部分的峰值大小相等，但相隔30年。对坎伯兰区的保护区进行的环境控制往往会破坏这种循环。在草原部分，最高渔获量出现在2个多雨年后。在其他部分，麝鼠种群与降水量无关。
The yearly production of muskrat pelts in Saskatchewan for the period 1915–60 exhibits a 6-year periodicity instead of the expected 10-year cycle. To check the synchrony of these periodicities, the province is divided into thirds: the southern prairie section, the middle aspen grove section, and the northern Canadian Shield section. In the prairie section there are two main peaks, one in 1923 and the other in 1955. The remainder of the peaks, which are at 6-year intervals, vary greatly in magnitude. The aspen grove section has peaks which are also 6 years apart but are of similar magnitude. The northern section has peaks of equal magnitude which are 30 years apart. The environmental control exercised on the conservation blocks in the Cumberland House area tends to disrupt the cycle.Some of the population changes are correlated with precipitation data. In the prairie section, the highest catches occur after 2 wet years. In the other sections, the muskrat population is not correlated with the precipitation....