Citation: Sandvik, H., R. T. Barrett, K. E. Erikstad, M. S. Myksvoll, F. VikebÝ, N. G. Yoccoz, T. Anker‑Nilssen, S.‑H. Lorentsen, T. K. Reiertsen, J. Skarðhamar, M. Skern‑Mauritzen, and G. H. Systad (2016) Drift patterns of fish larvae link coastal morphology to seabird colony distribution. – Talk given at the 13th International Seabird Group Conference in Edinburgh.
Abstract: Colonial breeding is an evolutionary puzzle, as the benefits of breeding in high densities are still not fully explained. Although the dynamics of existing colonies are increasingly understood, few studies have addressed the initial formation of colonies, and empirical tests are rare. Based on a high-resolution coupled ocean-circulation model and an individual-based larval-drift model, the distribution of seabird colonies along the Norwegian coast can be explained by variations in the availability and predictability of fish larvae. The modelled variability in concentration of fish larvae is, in turn, predicted by the topography of the continental shelf and coastline. The advection of fish larvae along the coast thus translates small-scale topographic characteristics into the spatial distribution of top-predator breeding sites. Our findings provide empirical corroboration of the hypothesis that seabird colonies are founded in locations that minimise travel distances between breeding and foraging locations, thereby enabling optimal foraging by central-place foragers.
Related publications: This study has now been published in Nature Communications.