Document Details
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Title |
Parameterization of the Northern Goshawk (Accipiter gentilis laingi) habitat model for coastal British Columbia: nesting and foraging habitat suitability models and territory analysis model. | ||||||
Author |
Mahon, Todd | ||||||
Date |
2010 | ||||||
Abstract |
The purpose of this project was to develop a standardized habitat model for the Northern Goshawk (Accipiter gentilis laingi; hereafter goshawk) across this subspecies. range in coastal British Columbia. The overall model consists of three components: a goshawk nesting habitat model, a foraging habitat model, and a ¡°territory¡± model. The ¡°territory¡± model was used primarily for analysis purposes to assess the amount and distribution of nesting and foraging habitat relative to average goshawk territory size in the region. The structures of the nesting habitat and foraging habitat models are based on the Habitat Suitability Index (HSI) methodology. This report summarizes the variables used in the models and the ratings assigned for each variable, which were developed, based on observed habitat use by goshawks in Coastal BC, relevant literature, and the expert opinion of the authors. Separate reports detailing the results and outputs of the model has been prepared by Cortex Consultants (Smith et al. 2006, 2007, 2008), who implemented the model. As of March 2008 the model has now been applied to all four goshawk conservation regions: Haida Gwaii, North Coast, South Coast and Vancouver Island. Field verification of the model has been conducted on Haida Gwaii and a sensitivity analysis was conducted 2007 to assess the relative influence of variables within the models. Additional verification work is planned for 2008/09 in other Conservation Regions. Based on the results of the verification work and sensitivity analysis one final revision of the models across all regions is planned for the future. | ||||||
Report Number |
FIA2010MR058 | ||||||
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