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Armstrong, A.J. & Siegfried, W.R. 1991. Consumption of Antarctic krill by Minke Whales. Antarctic Science 3:13-18.
Armstrong, A.J. & Siegfried, W.R. 1991. Intra-seasonal variation in clutch size of the Cape Shoveller in the south-western Cape. South African Journal of Wildlife Research 21:94.
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Chadwick, P.I. 1991. Third specimen record of the Antarctic Petrel Thalassoica antarctica for Africa. Marine Ornithology 19:69-70.
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Cooper, J. & Fourie, A. 1991. Improved breeding success of Great-winged Petrels Pterodroma macroptera following control of feral Cats Felis catus at Subantarctic Marion Island. Bird Conservation International 1:171-175.
Cooper, J. & Headland, R.K. 1991. A history of South African involvement in Antarctica and at the Prince Edward Islands. South African Journal of Antarctic Research 21:77-91.
Cooper, J., Siegfried, W.R., Ryan, P.G., Crafford, J.E. & Stock, W.D. 1991. Effects of ornithogenic products on ecosystem structure and functioning: a new South African Biological Antarctic Research Subprogramme. South African Journal of Science 87:223-226.
Cooper, J. & Underhill, L.G. 1991. Breeding, mass and primary moult data of European Starlings Sturnus vulgaris at Dassen Island, South Africa. Ostrich 62:1-7.
Cooper, J., Underhill, L.G. & Avery, G. 1991. Primary molt and transequatorial migration of the Sooty Shearwater. Condor 93:724-730.
Crawford, R.J.M., Ryan, P.G. & Williams, A.J. 1991. Seabird consumption and production in the Benguela and western Agulhas systems. South African Journal of Marine Science 11:357-375.
Crawford, R.J.M., Underhill, L.G., Shannon, L.V., Lluch-Belda, D., Siegfried, W.R. & Villacastin-Herrero, C.A. 1991. An empirical investigation of trans-oceanic linkages between areas of high abundance of sardine. (In: Kawasaki, T., Tanaka, S., Toba, Y. & Taniguchi, A., eds. Proceedings of the International Symposium on Long-term Variability of Pelagic Fish Populations and their Environment. Oxford: Pergamon Press.)
Crowe, T.M. 1991. Introductory remarks: systematics and biogeography of Afrotropical birds. Acta Congressus Internationalis Ornithologici 20:449.
Crowe, T.M. 1991. Introduction. (In: Crowe, T.M., ed. Proceedings of a Workshop on Conservation and Genetics held in July 1991 at Stellenbosch. Cape Town: FitzPatrick Institute. pp. 3-5).
Crowe, T.M. 1991. Genetics, biotechnology and the conservation of biodiversity? South African Journal of Science 87:81-84.
Crowe, T.M. 1991. International ornithology: politics, progress and possibilities. South African Journal of Science 87:350-352.
Crowe, T.M., Siegfried, W.R. & Harley, E.H. 1991. Recent advances in palaeoanthropology, conservation biology, phylogenetics and molecular evolution. South African Journal of Science 87:154-163.
Dean, W.R.J. & Brooke, R.K. 1991. Review of the Olive Bee-eater Merops superciliosus breeding in eastern Africa south of 14S. Ostrich 62:86-88.
Dean, W.R.J. & Milton, S.J. 1991. Disturbances in semi-arid shrubland and arid grassland in the Karoo, South Africa: mammal diggings as germination sites. African Journal of Ecology 29:11-16.
Dean, W.R.J. & Milton, S.J. 1991. Patch disturbances in arid grassy dunes: antelope, rodents and annual plants. Journal of Arid Environments 20:231-237.
Dean, W.R.J. & Milton, S.J. 1991. Emergence and oviposition of Quintillia cf. conspersa Karsch (Homoptera: Cicadidae) in the southern Karoo, South Africa. Journal of the Entomological Society of Southern Africa 54:111-119.
Dean, W.R.J. & Milton, S.J. 1991. Prey capture by Solpuga chelicornis Lichtenstein (Solifugae: Solpugidae). Journal of the Entomological Society of Southern Africa 54:266-267.
Dean, W.R.J., Milton, S.J., Watkeys, M.K. & Hockey, P.A.R. 1991. Distribution, habitat preference and conservation status of the Red Lark Certhilauda burra in Cape Province, South Africa. Biological Conservation 58:257-274.
Dean, W.R.J. & Siegfried, W.R. 1991. Orientation of diggings of the Aardvark. Journal of Mammalogy 72:823-824.
Dean, W.R.J. & Turner, J.S. 1991. Ants nesting under stones in the semi-arid Karoo, South Africa: predator avoidance or temperature benefits? Journal of Arid Environments 21:59-69.
Denbigh, P., Smith, Q. & Hampton, I. 1991. Determination of fish number density by a statistical analysis of backscattered sound. Journal of the Acoustical Society of America 90:457-469.
Du Plessis, C.J., Seddon, P.J., Van Heezik, Y.M. & Adams, N.J. 1991. Aspects of the incubation period of the King Penguin Aptenodytes patagonicus at Archway Bay, Marion Island. Marine Ornithology 19:148-151.
Du Plessis, M.A. 1991. The role of helpers in feeding chicks in cooperatively breeding Green (Red-billed) Woodhoopoes. Behavioral Ecology and Sociobiology 28:291-295.
Duffy, D.C. 1991. Ants, ticks and nesting seabirds: dynamic interactions? (In: Loye, J.E. and Zuk, M., eds. Bird-parasite interactions: ecology, evolution and behaviour. Oxford: Oxford University Press. pp. 242-257).
Earle, R.A., Huchzermeyer, F.W., Bennett, G.F. & Little, R.M. 1991. Occurrence of Plasmodium juxtanucleare in Greywing Francolin. South African Journal of Wildlife Research 21:30-32.
Enticott, J.W. 1991. Identification of Soft-plumaged Petrel. British Birds 84:245-264.
Enticott, J.W. 1991. Distribution of the Atlantic Petrel Pterodroma incerta at sea. Marine Ornithology 19:49-60.
Essop, M.F. & Crowe, T.M. 1991. Genetic evidence for separate species status in some disputed cases in southern African vertebrates. (In: Crowe, T.M., ed. Proceedings of a Workshop on Conservation and Genetics held in July 1991 at Stellenbosch. Cape Town: FitzPatrick Institute. pp. 44).
Essop, M.F., Harley, E.H., Lloyd, P.H. & Van Hensbergen, H.J. 1991. Estimation of the genetic distance between Bontebok and Blesbok using mitochondrial DNA. South African Journal of Science 87:271-273.
Grant, W.S., Little, R.M. & Crowe, T.M. 1991. Genetic variation in the Greywing Francolin Francolinus africanus. (In: Crowe, T.M., ed. Proceedings of a Workshop on Conservation and Genetics held in July 1991 at Stellenbosch. Cape Town: FitzPatrick Institute. pp. 35).
Hayes, B.P., Martin, G.R. & Brooke, M. DE L. 1991. Novel area serving binocular vision in the retinae of procellariiform seabirds. Brain, Behavior and Evolution 37:79-84.
Hunter, S. 1991. The impact of avian predator-scavengers on King Penguin Aptenodytes patagonicus chicks at Marion Island. Ibis 133:343-350.
Jacobs, D.S., Bennett, N.C., Jarvis, J.U.M. & Crowe, T.M. 1991. The colony structure and dominance hierarchy of the Damaraland Mole-rat, Cryptomys damarensis (Rodentia: Bathyergidae), from Namibia. Journal of Zoology, London 224:553-576.
Jenkins, A.R. 1991. Latitudinal prey productivity and potential density in the Peregrine Falcon. Gabar 6:20-24.
Jenkins, A.R., Wagner, S.T. & Hoffman, I. 1991. First breeding record of the Taita Falcon in South Africa. Ostrich 62:78.
Kaletja, B. & Hockey, P.A.R. 1991. Distribution, abundance and productivity of benthic invertebrates at the Berg River Estuary, South Africa. Estuarine, Coastal and Shelf Science 33:175-191.
Kemp, A.C. & Crowe, T.M. 1991. Morphometrics of the Falconiformes: an overview. Acta Congressus Internationalis Ornithologici 20:483-490.
Knight, R.S. & Macdonald, I.A.W. 1991. Acacias and korhaans: an artificially assembled seed dispersal system. South African Journal of Botany 57:220-225.
Komen, J. 1991. Energy requirements of nestling Cape Vultures. Condor 93:153-158.
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Little, R.M. 1991. Home range site fidelity by a Lanner Falcon. Gabar 6: 30.
Lombard, A.T. 1991. Environmental management in the Space Age: the GIS tool. (In: Proceedings of the Southern African International Conference on Environmental Management - Working Group 2: Tools of Environmental Management. Johannesburg: Industrial Environmental Forum of Southern Africa).
Lovegrove, B.G. 1991. The evolution of eusociality in molerats (Bathyergidae): a question of risks, numbers, and costs. Behavioral Ecology and Sociobiology 28:37-45.
Lovegrove, B.G. 1991. Mima-like mounds (heuweltjies) of South Africa: the topographical, ecological and economic impact of burrowing animals. Symposiums of the Zoological Society of London 63:183-198.
Lovegrove, B.G., Heldmaier, G. & Knight, M. 1991. Seasonal and circadian energetic patterns in an arboreal rodent, Thallomys paedulcus, and a burrow-dwelling rodent, Aethomys namaquensis, from the Kalahari Desert. Journal of Thermal Biology 16:199-209.
Lovegrove, B.G., Heldmaier, G. & RUF, T. 1991. Perspectives of endothermy revisited: the endothermic temperature range. Journal of Thermal Biology 16:185-197.
Macdonald, I.A.W. 1991. Review: Granivorous birds in the agricultural landscape (Pinowski & Summers-Smith Eds). Ostrich 62: 214.
Macdonald, I.A.W., Thebaud, C., Straum, W. & Strasberg, D. 1991. Effects of alien plant invasions on native vegetation remnants on La Reunion (Mascarene Islands, Indian Ocean). Environmental Conservation 18:51-61.
Malan, G. 1991. Cooperative hunting by Rednecked Falcons. Gabar 6:70-71.
Malan, G. & Crowe, T.M. 1991. The genetics of facultative polyandry in the Pale Chanting Goshawk. (In: Crowe, T.M., ed. Proceedings of a Workshop on Conservation and Genetics held in July 1991 at Stellenbosch Cape Town: FitzPatrick Institute. pp. 78).
Mentis, M.T. & Siegfried, W.R. 1991. Science: the last bastion of authoritarianism? South African Journal of Science 87:282-283.
Milton, S.J. 1991. Plant spinescence in arid southern Africa: does moisture mediate selection by mammals? Oecologia 87:279-287.
Milton, S.J. 1991. Slow recovery of defoliated Seven-weeks Fern Rumohra adiantiformis in Harkerville Forest. Suid-Afrikaanse Bosboutydskrif 158:23-27.
Milton, S.J. 1991. Estimated woody litterfall in broadleaved, evergreen forest, southern Cape, South Africa. Suid-Afrikaanse Bosboutydskrif 158:29-32.
Navarro, R.A. 1991. Food addition and twinning experiments in the Cape Gannet: effects on breeding success and chick growth and behaviour. Colonial Waterbirds 14:92-102.
Newton, I.P., Cowling, R.M. & Lewis, O.A.M. 1991. Growth of calcicole and calcifuge Agulhas Plain Proteaceae on contrasting soil types, under glasshouse conditions. South African Journal of Botany 57:319-324.
Place, A.R. & Jackson, S. 1991. Chitin digestion and assimilation by seabirds. Acta Congressus Internationalis Ornithologici 20:1378-1383.
Preston, G.R., Fuggle, R.F. & Siegfried, W.R. 1991. Attitudes of business leaders and professional ecologists towards regulating environmental social costs in South Africa. South African Geographer 18:55-72.
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Randi, E., Fusco, G., Lorenzini, R. & Crowe, T.M. 1991. Phylogenetic relationships and rates of allozyme evolution within the Phasianidae. Biochemical Systematics and Ecology 19:213-221.
Rebelo, A.G. 1991. Community organization of sunbirds in the Afro-tropical Region. Acta Congressus Internationalis Ornithologici 20:1180-1187.
Rebelo, A.G. 1991. Protea atlas manual. Cape Town: privately published.
Rebelo, A.G. 1991. Can we preserve fynbos in road reserves? Road verge practices and plant survival in fynbos on the Cape Flats. (In: Van Warmelo, W., ed. Workshop "Corridor Conservation", Cape Town, 6 September 1991. Cape Town: Botanical Society of Southern Africa. pp. 19-20).
Rebelo, A.G. & Cowling, R.M. 1991. The preservation of plant species in the Cape Floristic Region: problems with the available data bases for the Riversdale Magisterial District. South African Journal of Botany 57:186-190.
Rebelo, A.G., Cowling, R.M., Campbell, B.M. & Meadows, M. 1991. Plant communities of the Riversdale Plain. South African Journal of Botany 57:10-28.
Ryan, P.G. 1991. The impact of the commercial lobster fishery on seabirds at the Tristan da Cunha Islands, South Atlantic. Biological Conservation 57:339-350.
Ryan, P.G., Avery, G. & Steele, W.K. 1991. Marine and coastal birds in False Bay: distribution, population sizes and conservation. Transactions of the Royal Society of South Africa 47:649-662.
Ryan, P.G. & Cooper, J. 1991. Rockhopper Penguins and other marine life threatened by driftnet fisheries at Tristan da Cunha. Oryx 25:76-79.
Ryan, P.G. & Moloney, C.L. 1991. Prey selection and temporal variation in the diet of Subantarctic Skuas at Inaccessible Island, Tristan da Cunha. Ostrich 62:52-58.
Ryan, P.G. & Moloney, C.L. 1991. Tristan Thrushes kill adult White-bellied Storm-Petrels. Wilson Bulletin 103:130-132.
Seddon, P.J. 1991. An ethogram for the Yelloweyed Penguin Megadyptes antipodes. Marine Ornithology 19:109-115.
Seddon, P.J. & Seddon, R.J. 1991. Chromosome analysis and sex identification of Yelloweyed Penguins. Marine Ornithology 19:144-147.
Seddon, P.J. & Van Heezik, Y.M. 1991. Hatching asynchrony and brood reduction in the Jackass Penguin: an experimental study. Animal Behaviour 42:347-356.
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Seddon, P.J. & Van Heezik, Y. 1991. Patterns of nest relief during incubation by Jackass Penguins Spheniscus demersus. Ostrich 62:82-83.
Seddon, P.J., Van Heezik, Y. & Cooper, J. 1991. Observations of within-colony breeding synchrony in Jackass Penguins. Wilson Bulletin 103:480-485.
Siegfried, W.R. 1991. Three decades of South African science in Antarctica. South African Journal of Antarctic Research 21:225-229.
Siegfried, W.R. 1991. Review: Antarctic ichthyology (Gon & Heemstra Eds). South African Journal of Science 87:342.
Siegfried, W.R. 1991. Into the 1990s with a strategic bang or a goalless whimper? South African Journal of Science 87:561-563.
Siegfried, W.R., Brooke, R.K. & Armstrong, A.J. 1991. Trends in the literature of Afrotropical ornithology. Acta Congressus Internationalis Ornithologici 20:450-458.
Steele, W.K. 1991. Review: Nearctic gulls in the western Palearctic (Hoogendoorn & Steinhaus). Ostrich 62:96.
Steele, W.K. & Hockey, P.A.R. 1991. The human influence on Kelp Gull diet assessed using stable carbon isotope analysis of bone collagen. South African Journal of Science 87:273-275.
Van Heezik, Y.M. 1991. A comparison of Yellow-eyed Penguin growth rates across fifty years: Richdale revisited. Notornis 38:117-123.
Vanherck, L. 1991. Review: Colloque International d'Ornithologie - expansion et regression des especes. Ostrich 62:96.
Vanherck, L. 1991. Review: Important bird areas in Europe (Grimmett & Jones). Ostrich 62:216.
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Van Zyl, A.J. 1991. Unusual falcon hunting behaviour. Gabar 6:68.
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Velasquez, C.R., Kaletja, B. & Hockey, P.A.R. 1991. Seasonal abundance, habitat selection and energy consumption of waterbirds at the Berg River Estuary, South Africa. Ostrich 62:109-123.
Williams, J.B. 1991. On the importance of energy considerations to small birds with gynelateral intermittent incubation. Acta Congressus Internationalis Ornithologici 20:1964-1975.
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Wilson, R.P., Wilson, M.-P.T., Link, R., Mempel, H. & Adams, N.J. 1991. Determination of movements of African Penguins Spheniscus demersus using a compass system: dead reckoning may be an alternative to telemetry. Journal of Experimental Biology 157:557-564.
Wissel, C. & Macdonald, I.A.W. 1991. Ein Modell zur Optimierung der Bekaempfung von eingewanderten Fremdpflanzen in Fynbos. Verhandlungen der Gesellschaft fuer Oekologie 20:769-776.
