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Alberta furbearer harvest data analysis

Description

A literature review was conducted to examine the potential uses and limitations of using trapper harvest data to monitor species distribution and population trend. Harvest, price, and distribution... More ≫

Description

A literature review was conducted to examine the potential uses and limitations of using trapper harvest data to monitor species distribution and population trend. Harvest, price, and distribution of harvest for most furbearers in Alberta is presented. In addition, an attempt is made to measure changes in abundance by mapping distribution across time and calculating an abundance index based on harvest and pelt price. To make better use of current and future Alberta furbearer harvest data, the following suggestions are offered: The Alberta trapper harvest data needs to be collected consistently for the entire province; harvest data collection should be based on pelt counts rather than unverified trapper affidavits; an index of abundance for each species based on a thorough analysis of correlations between harvest and various indices of effort, and the findings of others should be developed; data verification routines are required to enhance consistency; and each year all collected...

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Gillett's Checkerspot in the Southern Headwaters At Risk Project (SHARP) area

Description

Gillett's Checkerspot is a colourful and distinctive butterfly that has a very small global range and a global conservation status rank of imperiled/vulnerable. The species is relatively well... More ≫

Description

Gillett's Checkerspot is a colourful and distinctive butterfly that has a very small global range and a global conservation status rank of imperiled/vulnerable. The species is relatively well known with respect to its biology and ecology. Available information is summarized in this report and differences between USA and Alberta populations are discussed. The ecology of the species renders it amenable to integration with economic activity. It can be accommodated without significant expense or impact on other natural resource uses. In some cases, forest canopy removal associated with development can be a positive factor for the species but in the past this has been an accidental byproduct of such activity. Brief strategic and operations guidelines are recommended.

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