Ivlev's selctivity index. With either one, the difficulty is equating measured abundance in the habitat with availability. mcneely
---- Gianluca Polgar <[email protected]> wrote: > Dear all, > > I'm going to estimate the food selectivity of some fishes and I'd like > to adopt the food selectivity index of Berg (1979). > > This index utilises the numerical abundance of food items, measured both > in the gut and in the habitat. > Nonetheless, a considerable percentage of food items is NOT countable > (e.g. detritus, plant material)... > > My question is: would it be a feasible option to utilise a measure of > bulk of food items (e.g. volume) instead of amounts? > Is anyone aware of any other indexes of food selectivity that could be > adopted with non-countable items? > > Any suggestion will be more than welcome! > > All the best, > > > Gianluca > > -- > Gianluca Polgar Ph.D. > Senior lecturer > Institute of Biological Sciences > Institute of Ocean and Earth Sciences > Faculty of Science, University of Malaya > 50603 Kuala Lumpur, Malaysia > Tel.: 017-6223549 > Fax (ISB): 03-79674178 > e-mail: [email protected] > www.themudskipper.org > > O___!||||__/////__ > {__)_ -- David McNeely
