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MARIVE Orvitηologu MARINE ORNITHOLOGY Journal of Seabird Science and Conservation Volume 40(2) October 2012 MARINE ORNITHOLOGY An International Journal of Seabird Science and Conservation Published by the Pacific Seabird Group On behalf of the African, Australasian, Dutch, Japanese, Pacific and UK Seabird Groups ISSN 1018-3337 EDITOR-IN-CHIEF Tony Gaston, Environment Canada EDITORS Rob Barrett, University of Tromsø, Norway Alan Burger, University of Victoria, Canada Peter Dann, Phillip Island Nature Park, Australia Sebastien Descamps, Norwegian Polar Institute, Norway Tony Diamond, University of New Brunswick, Canada Peter G.H. Evans, University of Bangor, UK Nina Karnovsky, Pomona College, California, USA Kathy Kuletz, US Fish and Wildlife Service, Anchorage, Alaska, USA Yan Ropert-Coudert, CNRS-Strasburg, France BOOK REVIEW EDITOR Patricia Baird, Simon Fraser University, Canada FOUNDING EDITOR John Cooper, South Africa TECHNICAL EDITOR Carolyn Brown, carolynjbrown.wordpress.com DTP Reber Creative reberco.com Marine Ornithology is abstracted/indexed in the Antarctic Bibliography, Aquatic Sciences and Fisheries Abstracts, Biological Abstracts, BIOSIS Previews, Current Advances in Ecological and Environmental Sciences, Current Antarctic Literature, Ecological Abstracts, Ecology Abstracts, Geo Abstracts, Geobase, Oceanographic Literature Review, Ornithological Abstracts, Polar and Glacialogical Abstracts, Recent Ornithological Literature, Wildlife Review and Zoological Record – Aves. Front cover picture: An albino Guanay Cormorant Phalacrocorax bougainvillii stands out among its normal conspecifics at Isla Pescadores, Peru (see Delord et al., p. 123). Photo courtesy Karine Delord. Dutch Seabird Group MARINE ORNITHOLOGY VOL. 40 NO. 2 ISSN 1018-3337 2012 CONTENTS CONTRIBUTED PAPERS FIJN, R.C., VAN FRANEKER, J.A. & TRATHAN, P.N. Dietary variation in chick-feeding and self-provisioning Cape Petrel Daption capense and Snow Petrel Pagodroma nivea at Signy Island, South Orkney Islands, Antarctica . .81–87 POLITO, M.J., CLUCAS, G.V., HART, T. & TRIVELPIECE, W.Z. A simplified method of determining the sex of Pygoscelis penguins using bill measurements . 89–94 DEHNHARD, N., LUDYNIA, K. & ALMEIDA, A. A Royal Penguin Eudyptes schlegeli in the Falkland Islands? . 95–98 BOLAND, C.R.J., SMITH, M.J., MAPLE, D., TIERNAN, B. & NAPIER, F. An island-wide survey of Abbott’s Booby Papasula abbotti occupancy on Christmas Island, Indian Ocean . .99–103 DUNLOP, J.N. & SURMAN, C.A. The role of foraging ecology in the contrasting responses of two dark terns to a changing ocean climate . 105–110 ROBINETTE, D.P., NUR, N., Brown, A. & Howar, J. Spatial distribution of nearshore foraging seabirds in relation to a coastal marine reserve . 111–116 COMMENT HODGES, J.I. & KIRCHHOFF, M.D. 2012. Kittlitz’s Murrelet Brachyramphus brevirostris population trend in Prince William Sound, Alaska: implications of species misidentification . .117–120 SHORT NOTES BANDARA, I.N. & AMARASINGHE, C.J. Third confirmed record of the Red-footed Booby Sula sula from Sri Lanka . .121–122 DELORD, K., BARBRAUD, C. & BERTRAND, S. Rare colour aberration in the Guanay Cormorant Phalacrocorax bougainvillii . 123–124 HENNICKE, J.C., KING, B., Drynan, D., Hardy, L.J., Stokes, A. & TayloR, S. New life-span records of the Brown Booby Sula leucogaster . 125–126 JIMÉNEZ-UZCÁTEGUI, G., VALLE, C.A. & VARGAS, F.H. Longevity records of flightless cormorants Phalacrocorax harrisi . 127–128 WOLFAARDT, A.C., CROFTS, S. & BAYLIS, A.M.M. Effects of a storm on colonies of seabirds breeding at the Falkland Islands 129–133 REVIEWS CHU, E.W. Scientific Writing = Thinking in Words (D. Lindsay) . .135 EVERETT, W.T. Seabird Islands: Ecology, Invasion and Restoration (Mulder, C.P.H., Anderson, W.B., Towns, D.R. & P.J. Bellingham (eds.)) . .136 HEINEMANN, D. Shifting Baselines: The Past and the Future of Ocean Fisheries (Jackson, J., Alexander, K. & Sala, E. (eds.)) . 137–138 Rauzon, M.J. Seabird Genius: The Story of L.E. Richdale, the Royal Albatross, and the Yellow-eyed Penguin (N. Peat) ......139–140 MARINE ORNITHOLOGY Marine Ornithology is published by the Pacific Seabird Group, Submissions may be any of the following: on behalf of the African, Australasian, Dutch, Japanese and UK Seabird Groups. The journal provides an international outlet Review articles: major papers reviewing an area of marine bird for publications relating to marine birds, extending its reach science or conservation that achieve a new synthesis of existing and accessibility by appearing free on the World Wide Web in information; a form that can be downloaded and printed in the same style as Papers: reports of research results or conservation action exceeding the hardcopy document. The print version is available for both 2000 words in length; individual and institutional subscribers. Short communications: reports shorter than 2000 words (excluding references); Remittances for institutional and individual subscriptions to the Status reports: comprehensive reviews of seabird population status print version of Marine Ornithology should be sent to: for species and geographical regions; Tony Gaston, Editor-in-Chief Forum articles: short papers commenting on material carried by 174 Dufferin Road, Unit 11 the journal, reporting new hypotheses relating to marine bird Ottawa, ON, Canada K1M 2A6 science or conservation, or reporting biological or physical ([email protected]) processes relevant to marine birds but hitherto little known or See www.marineornithology.org for current subscription rates ignored by marine ornithologists. Individual subscription rates for residents of World Bank classified General queries and all submissions to Marine Ornithology, “low income” and “middle income” countries, are set at half the except books for review, should be directed to: rate for those in wealthier countries (for country classifications, see http://web.worldbank.org/wbsite/external/datastatistics). Tony Gaston, Editor-in-Chief 174 Dufferin Road, Unit 11 Marine Ornithology publishes papers relating to the biology and Ottawa, ON, Canada K1M 2A6 conservation of birds associated with the marine environment – ([email protected]) behaviour, biogeography, ecology, evolution, genetics, physiology and systematics. Papers are especially invited on topics relating to Books and proceedings for review should be sent to: the special adaptations of marine birds, the relationship between Patricia Baird, Review Editor seabirds and oceanography and seabird-fisheries interactions. Simon Fraser University, Centre for Wildlife Ecology Papers will be accepted on their merits as either pure science Burnaby, BC, Canada V5A 1S6 (advancement of knowledge), or conservation (advancement of ([email protected]} seabird conservation), including issues relating to public policy and legislation. Normal academic publishing policy is followed with © Marine Ornithology 2012 respect to authorship, originality, and sole publication. Everything that appears in the printed journal also appears on the website. Papers using video, sound clips, or other non-print media can be submitted for publication on the web only. Marine Ornithology is published both in hard copy and in electronic form at the Marine Ornithology website. For those browsing the electronic version of the journal, papers are available in Portable Document Format (.pdf) so that they can be captured as exact facsimiles of the printed version for reading or printing. There is no charge for viewing or downloading papers posted at www.marineornithology.org. Fijn et al.: DietaryContributed variation in Papers petrels at Signy Island 81 DIETARY VARIATION IN CHICK-FEEDING AND SELF-PROVISIONING CAPE PETREL DAPTION CAPENSE AND SNOW PETREL PAGODROMA NIVEA AT SIGNY ISLAND, SOUTH ORKNEY ISLANDS, ANTARCTICA RUBEN C. FIJN1,2, JAN A. VAN FRANEKER1 & PHIL N. TRATHAN3 1IMARES Wageningen UR, P.O. Box 167, 1790 AD Den Burg, Netherlands 2Current address: Bureau Waardenburg bv, Consultants for environment & ecology, P.O. Box 365, 4100 AJ Culemborg, Netherlands ([email protected]) 3British Antarctic Survey, Madingley Road, High Cross, Cambridge, Cambridgeshire, CB3 0ET, United Kingdom Received 25 November 2011, accepted 10 May 2012 SUMMARY FIJN, R.C., VAN FRANEKER, J.A. & TRATHAN, P.N. 2012. Dietary variation in chick-feeding and self-provisioning Cape Petrel Daption capense and Snow Petrel Pagodroma nivea at Signy Island, South Orkney Islands, Antarctica. Marine Ornithology 40: 81–87. Food web knowledge is a prerequisite for adequate resource management in the Antarctic ecosystem. Accurate dietary specifications for the major consumers within the Antarctic ecosystem are needed. Procellariid species are the most numerous avian species in Antarctica and account for 20% to 40% of the overall consumption by seabirds in the area. Diet composition of two important procellariids, Cape and Snow Petrels, was studied at Signy Island during the breeding season 2005–2006. Food samples were obtained by stomach flushing of both chick-feeding birds and self-provisioning birds. Original prey mass was reconstructed from identifiable remains in the stomach samples. Significantly different diet compositions were found between chick-feeding and self-provisioning Cape Petrels based on reconstructed weight (chick-feeders 39:61:0:0, fish:crustacean:squid:other; self-provisioning birds 28:65:7:1, F:C:S:O). By contrast, no significant differences were found between chick-feeding Snow Petrels (66:34:0:0, F:C:S:O) and self-provisioning birds (68:32:0:0, F:C:S:O). Dominant
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