Table 3.

Spectral analysis of the individual climatic indices and fur-count records. As in Table 2, the main periods are significant at the 99% level and secondary periods at the 95% level in MTM. The analysis after removing the trend yields the same periods, except 170 years, in the fur-count records and the NHT index.

Time series	Main periods	Secondary periods
NAO		3, 3.5
ENSO	4	2
NHT	170, 2.5	2
Bear	170, 3, 2.5
Beaver	170, 3, 2.5
Fisher	170, 3, 2.5
Fox	170	3, 2.5
Lynx	170, 10, 2.5	3
Marten	170, 3	10, 2.5
Mink	170, 3, 2.5
Muskrat	170, 3	2
Otter	170, 3, 2.5
Wolf	170, 2.5
Wolverene	170, 3, 2.5