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Marques, P. S., Frauendorf, T. C., Warbanski, M., Zandonà, E., El-Sabaawi, R.

Disentangling the effects of predation and density on resource use among and within populations

Authors contact information

Piatã S. Marques

Biology Department, University of Victoria, Victoria, BC, Canada V8P 5C2.

Therese C. Frauendorf

Biology Department, University of Victoria, Victoria, BC, Canada V8P 5C2.

Misha Warbanski

Biology Department, University of Victoria, Victoria, BC, Canada V8P 5C2.

Eugenia Zandonà

Departamento de Ecologia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brasil 20550-900.

Dawn A. T. Phillip (in memorian)

Department of Life Sciences, University of the West Indies, St. Augustine, Trinidad and Tobago.

Rana El-Sabaawi

Biology Department, University of Victoria, Victoria, BC, Canada V8P 5C2.

Files description

individual_dietary_proportions.csv – This file contains the diet data of each female (rows). This data was used to make the histogram of the proportion of each food item consumed (Figs. 2 and 3) and to plot the average gut ratio (Fig. 4). The column show details about the individual. Categorical variables include: site = sampling location, ind.ID = individual identification number, pool.ID = identification of the pool from which the individual was collected, feed.mode = resource use phenotype attribute to the individual based on the antimode of the distribution of the proportion of invertebrates in the guts. Continuous variables include:

fish.size = individual body standard length (mm), gut.length = the total length of the gut (mm),

gut.ratio = gut length / body size, detritus.tot.area = the amount of detritus in the diet (area of a

gridded microscope slide, mm

), inv.tot.area = the amount of invertebrates in the diet (area of a

gridded microscope slide, mm

), alg.tot.area = the amount of algae in the diet (area of a gridded

microscope slide, mm

), prop.det = proportion of detritus in relation to all food items consumed

by the individual, prop.inv = proportion of invertebrates in relation to all food items consumed

by the individual, prop.alg = proportion of algae in relation to all food items consumed by the

individual.

dietary_proportions.csv – This file contains the averages per pool within sites. This data was used on the GLMMs showing the relationship between fish density and the proportion of carnivorous phenotypes in pools. Each row represents one pool and columns show: pool = pool identification, site = site where the pool was located, origin = the presence of absence of

predators, n.diet = total number of individuals analyzed for diet in the pool, fish.dens.pool = density of fish calculated per pool (ind.m

) (see file fish_density.csv), canopy.pool = amount of canopy cover (%), fish.size.pool = average fish length (mm), int.lengh.pool = average gut length per pool (mm), invert.avail.pool = density of invertebrates in the pool (dry mass/m

), algae.avail.pool = average algae density per pool (Chla/m

), pred the average among all individual in that pool for

fish_density.csv – This file contains the fish count per pool within sites. This data was used to

estimate the density of individuals per pool. Each column represents one pool, while the columns

pass1-pass3 show the number of fishes sampled at each pool following a depletion sampling

method.