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Foraging area overlap

Posted by simonemordue on 16 Dec 2014 at 11:33 GMT

Please could you explain how you calculated expected overlap?

(Twenty-one dyads in 2009 (47%) and 74 dyads in 2010 (43%) exhibited greater foraging area overlap than expected)

Many thanks.

No competing interests declared.

RE: Foraging area overlap

silvis replied to simonemordue on 16 Dec 2014 at 14:22 GMT

We evaluated overlap using the utilization distribution overlap index (UDOI) described by Fieberg and Kochanny (2005; page 1348). The UDOI measures the joint distribution of the utilization distributions of 2 animals under the assumption that space is used independently of one another.

Fieberg, J., and C.O. Kochanny. 2005. Quantifying home-range overlap: The importance of the utilization distribution. Journal of Wildlife Management 69: 1346-1359.

Competing interests declared: Article author.