Abstract

Eastern Pacific migration strategies of pink-footed shearwaters Ardenna creatopus: implications for fisheries interactions and international conservation

Highlights

  • Delineating migratory pathways and at-sea distributions of marine birds during their non-breeding periods is important for identifying high-priority conservation and management areas (Shaffer et al 2006, Guilford et al 2009, Adams et al 2012)

  • Tags deployed off southern California provided additional information on North American non-breeding movements and habitat use, as well as return migration to Chile

  • 2 platform terminal transmitters (PTTs) exhibited tilt sensor records indicative of anomalous inactivity before transmission ceased, both in 2006 when we recorded shorter duration transmission periods (47 ± 34 d, n = 5 birds) than in other study years

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Summary

Introduction

Delineating migratory pathways and at-sea distributions of marine birds during their non-breeding periods is important for identifying high-priority conservation and management areas (Shaffer et al 2006, Guilford et al 2009, Adams et al 2012). Postbreeding adult sooty shearwaters Ardenna grisea from New Zealand travel to the North Pacific during the boreal summer, with round-trip migratory distances exceeding 40 000 km (Shaffer et al 2006). Such long-distance movements enable shearwaters to take advantage of multiple, widely dispersed oceanic resources, and expose them to at-sea threats at an ocean-basin scale (Shaffer et al 2006)

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