Specific predictions

Specific predictions - Specific predictions/insights from...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Specific predictions/insights from the model : 1) What happens when high-ranked prey types become abundant? Search costs/unit harvest decline, hence optimal diet becomes more specialized (e.g., caribou hunters or salmon fishers during migration/run exhibit extreme specialization) 2) What happens when low-ranked potential prey types become abundant? Nothing should change if they lie outside the optimal diet (if mice are too costly to bother with, their increased abundance won't change this -- as long as must harvest mice one at a time) These results contradict common-sense notion (found in much cultural ecology) that resources will be harvested in proportion to their abundance (e.g., that abundant food types will comprise bulk of the diet, etc.) Prey-choice model predicts that as long as abundance of prey type does not alter its handling cost, a low-ranked type not worth taking when rare is still not worth taking when abundant; in fact, harvesting abundant low-ranked prey types can be very costly, as it will reduce time available for harvesting high-ranked prey types even more than if only harvest the occasional (because rare) low-ranked prey type Thus, prey-choice model predicts that encounter rate with higher-ranked types
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/22/2011 for the course ANT ANT2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

Page1 / 2

Specific predictions - Specific predictions/insights from...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online