BIOL3007 Lecture Notes - Lecture 10: Pademelon, Wallaby, Logistic Regression
29 Nov 2018
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Document Summary
The fear of predators can influence population distributions and behaviour. One way prey overcome predation, is to group together. Attach success drops off with size of flock. They reduce the individual risk of being eaten by grouping together. However, costs of grouping include competition of food resources. There will be a trade-off, so it has costs and benefits associated with grouping. Example: predator: spotted tailed quolls, humans, tasmanian devils. Look at pademelon scat densities to determine distribution of the species (distance from plantation edge). Used statistical method of logistic regression from binomial (present or absent) distribution. Scats drop off the more towards center of area. They like to hide to escape predators, thus this makes sense in terms of crypsis and more likely to forage close to edge due to shelter. Wallabies had the opposite effect and were more likely to forage in the middle of plantation.
