Citation: Myksvoll, M. S., K. E. Erikstad, R. T. Barrett, H. Sandvik, and F. Vikebø (2013) Climate-driven ichthyoplankton drift model predicts growth of top predator young. Public Library of Science ONE, 8, e79225, 9 pp.
Key words: Atlantic Water, Barents Sea, chick body size, Gadus morhua, larval drift, Uria aalge.
Abstract: Climate variability influences seabird population dynamics in several ways including access to prey near colonies during the critical chick-rearing period. This study addresses breeding success in a Barents Sea colony of common guillemots Uria aalge where trophic conditions vary according to changes in the northward transport of warm Atlantic Water. A drift model was used to simulate interannual variations in transport of cod Gadus morhua larvae along the Norwegian coast towards their nursery grounds in the Barents Sea. The results showed that the arrival of cod larvae from southern spawning grounds had a major effect on the size of common guillemot chicks at fledging. Furthermore, the fraction of larvae from the south was positively correlated to the inflow of Atlantic Water into the Barents Sea thus clearly demonstrating the mechanisms by which climate-driven bottom-up processes influence interannual variations in reproductive success in a marine top predator.
Full text: © 2013 The authors. If you accept (i) the conditions specified in the Creative Commons "Attribution" 2.5 licence, and (ii) that printouts have to be made on recycled paper, you may download the article here (pdf, 1.9 MB).