RT Journal Article
T1 Prey diversity as a driver of resource partitioning between river‐dwelling fish species
A1 Sánchez-Hernández, Javier
A1 Gabler, Heidi-Marie
A1 Amundsen, Per-Arne
K1 Biodiversity
K1 Coexistence
K1 Dietary overlap
K1 Interindividual variation
K1 Mixed models
K1 Niche theory
AB Although food resource partitioning among sympatric species has often been explored in riverine systems, the potential influence of prey diversity on resource partitioning is little known. Using empirical data, we modeled food resource partitioning (assessed as dietary overlap) of coexisting juvenile Atlantic salmon (Salmo salar) and alpine bullhead (Cottus poecilopus). Explanatory variables incorporated into the model were fish abundance, benthic prey diversity and abundance, and several dietary metrics to give a total of seventeen potential explanatory variables. First, a forward stepwise procedure based on the Akaike information criterion was used to select explanatory variables with significant effects on food resource partitioning. Then, linear mixed‐effect models were constructed using the selected explanatory variables and with sampling site as a random factor. Food resource partitioning between salmon and bullhead increased significantly with increasing prey diversity, and the variation in food resource partitioning was best described by the model that included prey diversity as the only explanatory variable. This study provides empirical support for the notion that prey diversity is a key driver of resource partitioning among competing species
PB WILEY-BLACKWELL
YR 2017
FD 2017
LK http://hdl.handle.net/10347/16628
UL http://hdl.handle.net/10347/16628
LA eng
NO Sánchez-Hernández, J., Glaber, H.-M. & Amundsen P.-A. (2017). Prey diversity as a driver of resource partitioning between river-dwelling fish species. Ecology and Evolution 7: 2058–2068
NO Norwegian Research Council; Xunta de Galicia, Grant/Award Number: Plan I2C
DS Minerva
RD 24 abr 2026