The roach is a cyprinid freshwater-brackish benthopelagic fish, common to most of Europe and western Asia [http://www.fishbase.org/summary/Rutilus-rutilus.html] (http://www.fishbase.org/summary/Rutilus-rutilus.html). Larvae and juveniles are typically pelagic, consuming zooplankton, with a switch to more benthic diets as they grow, including plant material and detritus. The dataset included here examines if a consumer shows an ontogenetic shift in their trophic position, studying how TP varies across different size classes.
data("Roach")A data frame with 6 variables:
factor, with 5 levels, the common name of each baseline species and Roach
factor, with 3 levels, each representing three functional groups: Benthic_BL (bith, theodoxus and valvata), Pelagic_BL (zebra mussel) and Roach (consumer)
numeric, fork length of roach in mm
numeric, each representing deciles of fork length of roach
numeric, stable isotope values of d13C
numeric, stable isotope values of d15N