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    McInnes, Julie C. Raymond, Ben Phillips, Richard A. Jarman, Simon N. Lea, Mary-Anne and Alderman, Rachael 2016. A review of methods used to analyse albatross diets—assessing priorities across their range. ICES Journal of Marine Science: Journal du Conseil, p. fsw105.


    Alvito, Pedro M. Rosa, Rui Phillips, Richard A. Cherel, Yves Ceia, Filipe Guerreiro, Miguel Seco, José Baeta, Alexandra Vieira, Rui P. and Xavier, José C. 2015. Cephalopods in the diet of nonbreeding black-browed and grey-headed albatrosses from South Georgia. Polar Biology, Vol. 38, Issue. 5, p. 631.


    Robertson, Graham Moreno, Carlos Arata, Javier A. Candy, Steven G. Lawton, Kieran Valencia, Jose Wienecke, Barbara Kirkwood, Roger Taylor, Phil and Suazo, Cristián G. 2014. Black-browed albatross numbers in Chile increase in response to reduced mortality in fisheries. Biological Conservation, Vol. 169, p. 319.


    Phillips, Richard A. Ridley, Cindy Reid, Keith Pugh, Philip J.A. Tuck, Geoffrey N. and Harrison, Nancy 2010. Ingestion of fishing gear and entanglements of seabirds: Monitoring and implications for management. Biological Conservation, Vol. 143, Issue. 2, p. 501.


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Diet of grey-headed albatrosses at the Diego Ramírez Islands, Chile: ecological implications

  • JAVIER ARATA (a1), GRAHAM ROBERTSON (a2), JOSÉ VALENCIA (a3), JOSÉ C. XAVIER (a4) and CARLOS A. MORENO (a1)
  • DOI: http://dx.doi.org/10.1017/S095410200400207X
  • Published online: 01 September 2004
Abstract

The diet of grey-headed albatrosses at Diego Ramírez was analysed and compared to that of the sympatric black-browed albatross. Diet composition was inferred from an analysis of prey hard parts present in 103 chick regurgitates obtained during breeding seasons 2000, 2001 and 2002. The squid Martialia hyadesi predominated in the diet samples in 2001 and 2002 (89% and 81% of reconstituted mass), but was absent from the 2000 samples. Reconstituted mean mass per sample in 2000 was significantly lower than in 2001 and 2002. Chick growth rate during 2000 was also the lowest recorded. This suggests that M. hyadesi plays an important role in the breeding performance of grey-headed albatrosses at Diego Ramírez. Low presence of M. hyadesi in grey-headed albatrosses' diet at South Georgia in 2000, a year with significant low breeding success, suggests ocean-wide processes affecting the availability of this prey to both populations simultaneously. Overlap in diet composition, and inferred feeding areas, between the sympatric albatross species at Diego Ramírez was minimal. Grey-headed albatrosses fed mainly on species associated with the Antarctic Polar Front, whereas black-browed albatrosses consumed benthopelagic species frequently caught in fishing operations in southern Chile.

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Corresponding author
Corresponding author: javierarata@entelchile.net
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Antarctic Science
  • ISSN: 0954-1020
  • EISSN: 1365-2079
  • URL: /core/journals/antarctic-science
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