Filename: Hlouskova_et_al_competition.txt Initial total length, final total length, growth rate, survival rate, and injury rate in newt larvae, Ichthyosaura alpestris and Lissotriton vulgaris, in the presence or absence of heterospecifics. BL, block identity (n=10). Each block contained three tanks-only I. alpestris, only L. vulgaris, and I. alpestris together with L. vulgaris. TRT, treatment; AV, heterospecifics; CTRL, conspecifics. SP, species; ALP, I. alpestris; VUL, L. vulgaris. TL_start, initial total length (mm). Values are means per tank. TL_end, final total length (mm). Values are means per tank. GR, growth rate (mm day-1). GR was calculated as (TL_end-TL_start)/duration of experiment. Stage, developmental stage (after Watson and Russell (2000)). Values are means per tank. N_start, number of larvae per tank and species at the beginning of experiment. N_surv, number of survived larvae per tank and species at the end of experiment. N_injured, number of injured larvae per tank and species at the end of experiment. Survived, proportion of survived larvae per tank and species at the end of experiment calculated as N_surv/N_start. Injured, proportion of injured larvae per tank and species at the end of experiment calculated as N_injured/N_surv. Filename: Hlouskova_et_al_predation.txt Numbers of killed and injured individuals during a short-term predation trial in larvae of two newt species, Ichthyosaura alpestris and Lissotriton vulgaris. SP, species; ALP, I. alpestris; VUL, L. vulgaris. MeanT, mean water temperature (°C) during a predation trial. RangeT, range of water temperatures (°C) during a predation trial. Light, mean light intensity (lux) at water surface during a predation trial. Mean_TL, mean total length (mm) of newt larvae at the beginning of predation trial. TL_Predator, total length (mm) of predator (dragonfly larva). N_total, number of newt larvae at the beginning of predation trial. N_kill, number of killed newt larvae at the end of predation trial. N_injured, number of injured larvae at the end of predation trial. Proportion_Killed, proportion of killed newt larvae at the end of predation trial (N_kill/N_total). Proportion_Injured, proportion of injured newt larvae at the end of predation trial (N_injured/[N_total-N_kill]). Treatment: single, newts reared separately; conspecific_bigger, bigger individuals in conspecific pairs; conspecific_smaller, smaller individuals in conspecific pairs; heterospecific, heterospecific pairs. Tank: tank identity Body_mass_start: body mass (g) at the beginning of competition experiment. This body mass was used as the covariate in the analysis of growth rates. VO2: Minimum oxygen consumption (ml h-1) measured after the competition experiment. VO2_definition: SMR, standard metabolic rate; RMR, routine metabolic rate (individuals were active during VO2 measurements). Note that only SMR values were used for statistical analyses. Body_mass_end: body mass (g) at the end of competition experiment. This body mass was used as the covariate in the analysis of SMR. Distance_moved: Distance (cm) moved in experimental arena during 30 min of spontaneous activity. Growth_rate: Somatic growth rates (g d-1) calculated as the difference between initial and final body masses divided by the duration of experiment (30 or 31 days).