Pacific coral-reef fishes: the implications of behaviour and ecology of larvae for biodiversity and conservation, and a reassessment of the open population paradigm

摘要: The two-phase life history of most marine fishes and invertebrates has enormous implications for dispersal, population connectivity, resource management. Pelagic dispersal larvae animals traditionally thought to ensure that populations are widespread, chances local extinction low, protected areas (MPA) can easily function replenish both their own those unprotected areas. Traditionally, is considered depend primarily on two variables: pelagic larva duration far-field currents. These conclusions arise from the ‘open population’ paradigm usually accompanied by a ‘simplifying assumption’: distributed passively Unfortunately, they ignore complex reality circulation hydrological connectivity reefs, do not consider newly-demonstrated behavioural capabilities coral-reef fish larvae. Far-field varies with depth often excludes water bodies where propagules released, this important predicting trajectories even passive However, passive: late-stage swim faster than currents long periods, probably detect reefs at some distance, actively find them. This behaviour flexible, which greatly complicates modelling larval trajectories. Populations ecological (as opposed evolutionary) scales less open more subdivided previously assumed. All means predictions based solely wrong. An emerging view larval-fish articulated takes these new data perspectives into account. shows re-evaluation traditional views in several required, including contribution biology biodiversity patterns, way reef managed, MPA operate. At evolutionary zoogeographic scales, reef-fish best be open.