Incidental and intentional catch threatens Galápagos waved albatross

Jill A. Awkerman, Kathryn P. Huyvaert, Jeffrey Mangel, Joanna Alfaro Shigueto, David J. Anderson

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

As large, long-lived seabirds with delayed and slow reproduction, albatrosses have low intrinsic mortality rates and are especially vulnerable to extinction from extrinsic sources of mortality such as fishery bycatch. Leg-band recovery information for waved albatrosses revealed mortality from both incidental catch and intentional catch for human consumption. Annual adult survival in 1999-2005, estimated from capture-mark-recapture data, was lower than historical estimates. This recent increase in adult mortality probably contributed to recent and dramatic shrinkage of the breeding population; periodic matrix models confirm that population growth rate is most sensitive to changes in adult survival. Banding data and recovery information also suggest that capture by fisheries is male-biased, which should reduce fecundity in this species with obligate bi-parental care. This new documentation of bycatch, harvesting, and associated demographic consequences provides reason for serious concern about the persistence of the single breeding population of the waved albatross.

Original languageEnglish
Pages (from-to)483-489
Number of pages7
JournalBiological Conservation
Volume133
Issue number4
DOIs
StatePublished - Dec 2006
Externally publishedYes

Keywords

  • Albatross
  • Bycatch
  • ENSO
  • Fisheries
  • Galápagos
  • Harvest
  • Mark-resight
  • Periodic matrix model
  • Perú
  • Seabird

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