Mast productivity, red-backed vole productivity and rate of increase, northern saw-whet owl rate of increase, and fisher harvest age ratios for central Ontario, 1994-2016

Janet Greenhorn, Jeff Bowman, Simon Denomme-Brown & Danielle Ethier
Harvest management quotas for fishers (Pekania pennanti) in some jurisdictions are estimated from the previous year’s harvest, and stem from the hypothesis that age ratios in the harvest are largely influenced by ‘top-down’ trapping pressure. The influence of ‘bottom-up’ food supply on fisher harvest age ratios might be underappreciated, which could result in a misallocation of quotas in management planning. We assessed a variety of data sources to test the influence of bottom-up processes on...
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