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University of Cape Town
The effects of introduced mice on seabirds breeding at sub-Antarctic Islands Ben J. Dilley Thesis presented for the degree of Doctor of Philosophy Town FitzPatrick Institute of African Ornithology DST/NRF Centre of Excellence Department of Biological Sciences, Faculty of Science University of CapeCape Town of June 2018 University Supervised by Professor Peter G. Ryan The copyright of this thesis vests in the author. No quotation from it or information derivedTown from it is to be published without full acknowledgement of the source. The thesis is to be used for private study or non- commercial research purposes Capeonly. of Published by the University of Cape Town (UCT) in terms of the non-exclusive license granted to UCT by the author. University Declaration This thesis reports original research that I conducted under the auspices of the FitzPatrick Institute, University of Cape Town. All assistance received has been fully acknowledged. This work has not been submitted in any form for a degree at another university. ………………….................. Ben J. Dilley Cape Town, June 2018 i A 10 day-old great shearwater Ardenna gravis chick being attacked by an invasive House mouse Mus musculus in an underground burrow on Gough Island in 2014 (photo Ben Dilley). ii Table of Contents Page Abstract ....................................................................................................................................... iv Acknowledgements .......................................................................................................................... vi Chapter 1 General introduction: Islands, mice and seabirds ......................................................... 1 Chapter 2 Clustered or dispersed: testing the effect of sampling strategy to census burrow-nesting petrels with varied distributions at sub-Antarctic Marion Island ...... 13 Chapter 3 Modest increases in densities of burrow-nesting petrels following the removal of cats Felis catus from sub-Antarctic Marion Island ................................... -
UNEP/CBD/RW/EBSA/SIO/1/4 26 June 2013
CBD Distr. GENERAL UNEP/CBD/RW/EBSA/SIO/1/4 26 June 2013 ORIGINAL: ENGLISH SOUTHERN INDIAN OCEAN REGIONAL WORKSHOP TO FACILITATE THE DESCRIPTION OF ECOLOGICALLY OR BIOLOGICALLY SIGNIFICANT MARINE AREAS Flic en Flac, Mauritius, 31 July to 3 August 2012 REPORT OF THE SOUTHERN INDIAN OCEAN REGIONAL WORKSHOP TO FACILITATE THE DESCRIPTION OF ECOLOGICALLY OR BIOLOGICALLY SIGNIFICANT MARINE AREAS1 INTRODUCTION 1. In paragraph 36 of decision X/29, the Conference of the Parties to the Convention on Biological Diversity (COP 10) requested the Executive Secretary to work with Parties and other Governments as well as competent organizations and regional initiatives, such as the Food and Agriculture Organization of the United Nations (FAO), regional seas conventions and action plans, and, where appropriate, regional fisheries management organizations (RFMOs), with regard to fisheries management, to organize, including the setting of terms of reference, a series of regional workshops, with a primary objective to facilitate the description of ecologically or biologically significant marine areas (EBSAs) through the application of scientific criteria in annex I of decision IX/20, and other relevant compatible and complementary nationally and intergovernmentally agreed scientific criteria, as well as the scientific guidance on the identification of marine areas beyond national jurisdiction, which meet the scientific criteria in annex I to decision IX/20. 2. In the same decision (paragraph 41), the Conference of the Parties requested that the Executive Secretary make available the scientific and technical data and information and results collated through the workshops referred to above to participating Parties, other Governments, intergovernmental agencies and the Subsidiary Body on Scientific, Technical and Technological Advice (SBSTTA) for their use according to their competencies. -
Breeding Seabirds at Dassen Island, South Africa: Chances of Surviving Great White Pelican Predation
Vol. 9: 125–131, 2010 ENDANGERED SPECIES RESEARCH Published online January 11 doi: 10.3354/esr00243 Endang Species Res OPENPEN ACCESSCCESS Breeding seabirds at Dassen Island, South Africa: chances of surviving great white pelican predation Martin M. Mwema1, 2,*, Marta de Ponte Machado1, 2, Peter G. Ryan1 1Percy Fitzpatrick Institute, DST/NRF Centre of Excellence, University of Cape Town, Rondebosch 7701, South Africa 2Animal Demography Unit, Department of Zoology, University of Cape Town, Rondebosch 7701, South Africa Present address: Box 1019, 00100, GPO, Nairobi, Kenya ABSTRACT: Seabird predation by great white pelicans Pelecanus onocrotalus is an unusual phenom- enon that has become increasingly frequent in the Western Cape, South Africa. We report the scale of pelican predation and its impact on the breeding success of 5 seabird species monitored at Dassen Island in 2006. Pelican predation was observed on chicks of kelp gulls Larus dominicanus, crowned cormorants Phalacrocorax coronatus and Cape cormorants Phalacrocorax capensis. No predation on eggs was seen. Breeding success for 4 of the 5 species studied was low, with the white-breasted cor- morants Phalacrocorax lucidus having the highest breeding success (0.56 fledglings per nest). Cape and bank cormorants Phalacrocorax neglectus did not fledge any chicks, while crowned cormorants had a breeding success of 0.08 fledglings per nest. Kelp gulls had a hatching success of 46%, but only a few chicks fledged, giving a breeding success of 0.06 fledglings per nest. Pelican predation poses a threat to at least 3 of the 5 seabirds studied, all of which are endemic to southern Africa. Three spe- cies are globally Endangered or Near Threatened, and pelican predation places additional pressure on these species. -
Group Foraging in Socotra Cormorants: a Biologging Approach to the Study of a Complex Behavior Timothée R
Group foraging in Socotra cormorants: A biologging approach to the study of a complex behavior Timothée R. Cook, Rob Gubiani, Peter G. Ryan, Sabir B. Muzaffar To cite this version: Timothée R. Cook, Rob Gubiani, Peter G. Ryan, Sabir B. Muzaffar. Group foraging in Socotra cormorants: A biologging approach to the study of a complex behavior. Ecology and Evolution, Wiley Open Access, 2017, 7 (7), pp.2025-2038. 10.1002/ece3.2750. hal-01526388 HAL Id: hal-01526388 https://hal.sorbonne-universite.fr/hal-01526388 Submitted on 23 May 2017 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution| 4.0 International License Received: 5 October 2016 | Revised: 6 December 2016 | Accepted: 22 December 2016 DOI: 10.1002/ece3.2750 ORIGINAL RESEARCH Group foraging in Socotra cormorants: A biologging approach to the study of a complex behavior Timothée R. Cook1,2 | Rob Gubiani3 | Peter G. Ryan2 | Sabir B. Muzaffar3 1Department of Evolutionary Ecology, Evolutionary Ecophysiology Abstract Team, Institute of Ecology and Environmental Group foraging contradicts classic ecological theory because intraspecific competition Sciences, University Pierre et Marie Curie, Paris, France normally increases with aggregation. -
Rapid Radiation of Southern Ocean Shags in Response to Receding Sea Ice 2 3 Running Title: Blue-Eyed Shag Phylogeography 4 5 Nicolas J
bioRxiv preprint doi: https://doi.org/10.1101/2021.08.18.456742; this version posted August 19, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 1 1 Rapid radiation of Southern Ocean shags in response to receding sea ice 2 3 Running title: Blue-eyed shag phylogeography 4 5 Nicolas J. Rawlence1, *, Alexander T. Salis1, 2, Hamish G. Spencer1, Jonathan M. Waters1, 6 Lachie Scarsbrook1, Richard A. Phillips3, Luciano Calderón4, Timothée R. Cook5, Charles- 7 André Bost6, Ludovic Dutoit1, Tania M. King1, Juan F. Masello7, Lisa J. Nupen8, Petra 8 Quillfeldt7, Norman Ratcliffe3, Peter G. Ryan5, Charlotte E. Till1, 9, Martyn Kennedy1,* 9 1 Department of Zoology, University of Otago, Dunedin, New Zealand. 10 2 Australian Centre for Ancient DNA, University of Adelaide, South Australia, Australia. 11 3 British Antarctic Survey, Natural Environment Research Council, United Kingdom. 12 4 Instituto de Biología Agrícola de Mendoza (IBAM, CONICET-UNCuyo), Argentina. 13 5 FitzPatrick Institute of African Ornithology, Department of Biological Sciences, University 14 of Cape Town, South Africa. 15 6 CEBC-CNRS, UMR 7372, 405 Route de Prissé la Charrière, 79360 Villiers en Bois, 16 France. 17 7 Justus Liebig University, Giessen, Germany. 18 8 Organisation for Tropical Studies, Skukuza, South Africa. 19 9 School of Human Evolution and Social Change, Arizona State University, Arizona, USA. 20 21 Prepared for submission as a research article to Journal of Biogeography 22 23 * Corresponding authors: [email protected]; [email protected] 24 25 ACKNOWLEDGEMENTS 26 This work was supported with funding from the University of Otago. -
An Albino Cape Cormorant Phalacrocorax Capensis
72 Cook et al.: Albino Cape Cormorant AN ALBINO CAPE CORMORANT PHALACROCORAX CAPENSIS Timothée R. COOK1, OLIVER J.D. JEWELL2,3, WILFRED CHIVELL2 & MarthÁN N. BESTER3 1Percy FitzPatrick Institute of African Ornithology, DST ⁄ NRF Centre of Excellence, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa ([email protected]) 2Dyer Island Conservation Trust, 5 Geelbek Street, Kleinbaai 7720, South Africa 3Department of Zoology and Entomology, University of Pretoria, Hatfield 0002 South Africa 0002 Received 28 November 2011, accepted 11 March 2012 Albinism has been recorded in many vertebrate taxa (Halls 2004). It of misidentifying the cause of the aberration, the use of the term is a genetic anomaly in which an autosomal recessive gene causes an “partial albinism” is incorrect, as albinism, by definition, cannot absence of the enzyme tyrosinase, resulting in a total lack of melanin be partial. An albino Cape Cormorant Phalacrocorax capensis was pigment in the skin, scales, hairs, feathers and eyes (van Grouw reported by Cooper (1985) in the collections of the South African 2006). The skin and eye colour of albinos is pink because the blood Museum of Cape Town. Examination of this 100-year-old specimen can be seen through the transparent, unpigmented tissues. In birds, it revealed that it might indeed have been an albino. However, in the is the most frequently reported colour aberration, although it is the absence of information about the eye colour of this bird when it was least frequent in occurrence. This is because it is commonly mistaken alive, this will remain difficult to confirm. -
Table Mountain National Park
BIRDS OF TABLE MOUNTAIN NATIONAL PARK The Cape Peninsula has many records of vagrant species blown by storms, ship assisted or victims of reverse migration Bolded [1] depicts vagrant species Rob # English (Roberts 7) English (Roberts 6) Table Mountain 1 Common Ostrich Ostrich 1 2 King Penguin King Penguin [1] 2.1 Gentoo Penguin (925) Gentoo Penguin [1] 3 African Penguin Jackass Penguin 1 4 Rockhopper Penguin Rockhopper Penguin [1] 5 Macaroni Penguin Macaroni Penguin [1] 6 Great Crested Grebe Great Crested Grebe 1 7 Blacknecked Grebe Blacknecked Grebe 1 8 Little Grebe Dabchick 1 9 Southern Royal Albatross Royal Albatross 1 9.1 Northern Royal Albatross 1 10 Wandering Albatross Wandering Albatross 1 11 Shy Albatross Shy Albatross 1 12 Blackbrowed Albatross Blackbrowed Albatross 1 13 Greyheaded Albatross Greyheaded Albatross 1 14 Atlantic Yellownosed Albatross Yellownosed Albatross 1 15 Sooty Albatross Darkmantled Sooty Albatross 1 16 Lightmantled Albatross Lightmantled Sooty Albatross 1 17 Southern Giant-Petrel Southern Giant Petrel 1 18 Northern Giant-Petrel Northern Giant Petrel 1 19 Antarctic Fulmar Antarctic Fulmar 1 21 Pintado Petrel Pintado Petrel 1 23 Greatwinged Petrel Greatwinged Petrel 1 24 Softplumaged Petrel Softplumaged Petrel 1 26 Atlantic Petrel Atlantic Petrel 1 27 Kerguelen Petrel Kerguelen Petrel 1 28 Blue Petrel Blue Petrel 1 29 Broadbilled Prion Broadbilled Prion 1 32 Whitechinned Petrel Whitechinned Petrel 1 34 Cory's Shearwater Cory's Shearwater 1 35 Great Shearwater Great Shearwater 1 36 Fleshfooted Shearwater Fleshfooted -
The Endangered Bank Cormorant Phalacrocorax Neglectus: the Heat Is On
The endangered bank cormorant Phalacrocorax neglectus: the heat is on Understanding the effect of climate change and associated environmental variable changes on the breeding biology and population dynamics of the bank cormorant in the Western Cape, South Africa Corlia Meyer MYRCOR004 ThesisUniversity presented for the Degree of of MasterCape of Science Town in Zoology, Department of Biological Sciences, Faculty of Science, University of Cape Town, South Africa April 2014 Supervisors: Prof. L.G. Underhill, Prof. P.G. Ryan, Dr R.B. Sherley and Dr T. Cook The copyright of this thesis vests in the author. No quotation from it or information derived from it is to be published without full acknowledgement of the source. The thesis is to be used for private study or non- commercial research purposes only. Published by the University of Cape Town (UCT) in terms of the non-exclusive license granted to UCT by the author. University of Cape Town Plagiarism declaration I know the meaning of plagiarism and declare that all of the work in this thesis, saved for that which is properly acknowledged, is my own. Signature:________________________ Date:_____________________________ i ii For the birds iii iv Abstract The bank cormorant Phalacrocorax neglectus was listed as ‘Endangered’ in 2004, following a decrease of more than 60% in the total population from 1975–2011. It ranges from central Namibia to the Western Cape, South Africa, with most of the population occurring on offshore islands in Namibia. The main reason for this study was to determine if climate change could be identified as a factor which has influenced the decreasing numbers of bank cormorants. -
Foraging Strategies of Great Cormorants Phalacrocorax Carbo Carbo Wintering North of the Arctic Circle
481059_v2 23/3/01 7:08 am Page 59 Bird Study (2001) 48, 59–67 Foraging strategies of Great Cormorants Phalacrocorax carbo carbo wintering north of the Arctic Circle ROGER JOHANSEN1,2,, ROBERT T. BARRETT1* and TORSTEIN PEDERSEN2 1Zoology Department, Tromsø University Museum, N-9037 Tromsø, Norway and 2Norwegian College of Fishery Science, University of Tromsø, N-9037 Tromsø, Norway This study describes how 30 Great Cormorants Phalacrocorax carbo carbo managed to catch sufficient food for their daily energetic needs under conditions of reduced daylight and cold while wintering north of the Arctic Circle. Activity observations showed that the Great Cormorants’ daily foraging pattern was generally bimodal, with morning and evening feeding peaks. They compensated for shorter daylengths in midwinter by starting to forage later and ending progressively earlier at lower light intensities. Fishing constituted only a minor part of their time–activity budget, and was one of the most efficient reported in marine birds. The Great Cormorants spent less than 60 minutes a day fishing in midwinter. Although subzero ambient temperatures and blizzards contributed to increased heat loss in midwinter, this potential energy loss did not seem to be compensated for by an increase in fish intake. Instead the Great Cormorants seemed to economize energy expenditure by halving the time spent at sea, and halving the number but doubling the mass of each fish taken. Thermoregulation in cold-climate animals that they are poorly insulated and their feathers depends mainly on body temperature, insula- become wet when diving (Rijke 1968, Siegfried tion, activity and lower critical temperature, as et al. -
A Abbott's Booby 652 Abyssinian Lovebird 584 Accipiter Bicolor
A African jacana 720 Abbott's booby 652 African malachite sunbird 1008 Abyssinian lovebird 584 African pygmy falcon (Polihierax semitorquatus) 17- Accipiter bicolor (bicolored hawk) 260 20 Accipiter cooperii (Cooper's hawk) 48, 257-260, 352, African pygmy goose (Nettapus auritus) 608, 940, 656 1032 Accipiter gentilis (northern goshawk) 260, 653-656 African pygmy kingfisher (Ceyx picta) 336 Accipiter gundlachi (Gundlach's hawk) 656 African skimmer (Rynchops flavirostris) 128 Accipiter nisus (Eurasian sparrowhawk) 349-352 African white-backed vulture 528 Accipiter rufiventris (rufous-breasted sparrowhawk) African wood owl (Strix woodfordii) 444 352 Agapornis spp. (lovebirds) 581-584 Accipiter soloenis (Chinese goshawk) 656 Agelaius phoeniceus (red-winged blackbird) 777-780 Accipiter tachiro (African goshawk) 656 Agelaius thilius (yellow-winged blackbird) 780 Accipiter trivirgatus (crested goshawk) 260 Aix galericulata (mandarin duck) 605-608, 1032 Accipitridae (Falconiformes) Aix sponsa (wood duck) 1029-1032 Accipiter cooperii (Cooper's hawk) 257-260 Ajaia ajaja (roseate spoonbill) 468 Accipiter gentilis (northern goshawk) 653-656 Alauda arvensis (skylark) 853-856 Accipiter nisus (Eurasian sparrowhawk) 349-352 Alauda gulgula (Oriental skylark) 856 Aquila chrysaetos (golden eagle) 381-384 Alaudidae 853-856 Aquila verreauxii (Verreaux's eagle) 957-960 albatross Circaetus gallicus (short-toed snake eagle) 849- black-browed (Diomedea melanophris) 101-104 852 wandering (Diomedea exulans) 973-976 Circus cyaneus (northern harrier) 657-660 waved -
Partitioning of Nesting Space Among Seabirds of the Benguela Upwelling Region
PARTITIONING OF NESTING SPACE AMONG SEABIRDS OF THE BENGUELA UPWELLING REGION DAviD C. DuFFY & GRAEME D. LA CocK Percy FitzPatrick Institute of African Ornithology, University of Cape Town, Rondebosch, South Africa, 7700. Received February /985 SUMMARY DuFFY, D. C. & LA CocK, G. D. 1985. Partitioning of nesting space among seabirds of the Benguela upwel ling region. Ostrich 56: 186-201. An examination of nesting habitats used by the four main species of seabirds nesting on southern African islands (Jackass Penguin Spheniscus demersus, Cape Cormorant Phalacrocorax capensis, Bank Cormorant P. neglectus and Cape Gannet Morus capensis) revealed relatively minor differences and extensive over laps between species, primarily in subcolony size, steepness of nesting substratum, and proximity to cliffs. A weak dominance hierarchy existed; gannets could displace penguins, and penguins could displace cor morants. This hierarchy appeared to have little effect on partitioning of nesting space. Species successfully defended occupied sites in most cases of interspecific conflict, suggesting that site tenure by one species could prevent nesting by another. The creation of additional nesting space on Namibian nesting platforms did not increase guano harvests, suggesting that nesting space had not previously limited the total nesting population of Cape Cormorants, the most abundant of the breeding species, in Namibia. While local shortages of nesting space may occur, populations of the four principal species of nesting seabirds in the Benguela upwelling region do not seem to have been limited by the availability of nesting space on islands. INTRODUCTION pean settlement, space for nesting was limited. Af ter settlement, human disturbance such as hunting The breeding seabirds of the Benguela upwel and guano extraction reduced nesting space, re ling region off Namibia and South Africa are be sulting in smaller populations of nesting seabirds. -
Threats to Seabirds: a Global Assessment 2 3 4 Authors: Maria P
1 Threats to seabirds: a global assessment 2 3 4 Authors: Maria P. Dias1*, Rob Martin1, Elizabeth J. Pearmain1, Ian J. Burfield1, Cleo Small2, Richard A. 5 Phillips3, Oliver Yates4, Ben Lascelles1, Pablo Garcia Borboroglu5, John P. Croxall1 6 7 8 Affiliations: 9 1 - BirdLife International. The David Attenborough Building, Pembroke Street Cambridge CB2 3QZ UK 10 2 - BirdLife International Marine Programme, RSPB, The Lodge, Sandy, SG19 2DL 11 3 – British Antarctic Survey. Natural Environment Research Council, High Cross, Madingley Road, 12 Cambridge CB3 0ET, UK 13 4 – Centre for the Environment, Fishery and Aquaculture Science, Pakefield Road, Lowestoft, NR33, UK 14 5 - Global Penguin Society, University of Washington and CONICET Argentina. Puerto Madryn U9120, 15 Chubut, Argentina 16 * Corresponding author: Maria Dias, [email protected]. BirdLife International. The David 17 Attenborough Building, Pembroke Street Cambridge CB2 3QZ UK. Phone: +44 (0)1223 747540 18 19 20 Acknowledgements 21 We are very grateful to Bartek Arendarczyk, Sophie Bennett, Ricky Hibble, Eleanor Miller and Amy 22 Palmer-Newton for assisting with the bibliographic review. We thank Rachael Alderman, Pep Arcos, 23 Jonathon Barrington, Igor Debski, Peter Hodum, Gustavo Jimenez, Jeff Mangel, Ken Morgan, Paul Sagar, 24 Peter Ryan, and other members of the ACAP PaCSWG, and the members of IUCN SSC Penguin Specialist 25 Group (Alejandro Simeone, Andre Chiaradia, Barbara Wienecke, Charles-André Bost, Lauren Waller, Phil 26 Trathan, Philip Seddon, Susie Ellis, Tom Schneider and Dee Boersma) for reviewing threats to selected 27 species. We thank also Andy Symes, Rocio Moreno, Stuart Butchart, Paul Donald, Rory Crawford, 28 Tammy Davies, Ana Carneiro and Tris Allinson for fruitful discussions and helpful comments on earlier 29 versions of the manuscript.