English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The four-year oscillations of the number of spawning sockeye salmon(Oncorhynchus nerka) that return to their native stream within the Fraser Riverbasin in Canada are a striking example of population oscillations. The periodof the oscillation corresponds to the dominant generation time of these fish.Various - not fully convincing - explanations for these oscillations have beenproposed, including stochastic influences, depensatory fishing, or geneticeffects. Here, we show that the oscillations can be explained as a stabledynamical attractor of the population dynamics, resulting from a strongresonance near a Neimark Sacker bifurcation. This explains not only thelong-term persistence of these oscillations, but also reproduces correctly theempirical sequence of salmon abundance within one period of the oscillations.Furthermore, it explains the observation that these oscillations occur only insockeye stocks originating from large oligotrophic lakes, and that they areusually not observed in salmon species that have a longer generation time.

A three-species model explaining cyclic dominance of pacific salmon