Bertram, George Colin Lawder

28 publications

Bertram, George Colin Lawder (detail)
1943Note on the sea cow in the Gulf of Aqaba.
Jour. Soc. Preserv. Fauna Empire (n.s.) Pt. 47: 21-23.
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Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1962Manatees of Guiana.
Nature (London) 196(4861): 1329. Dec. 29, 1962.
—Reprinted in Jour. Brit. Guiana Mus. & Zoo No. 37? Summarizes the status of manatees in British Guiana and neighboring regions, and efforts to use them in weed-clearing. Notes difficulty in the latter efforts due to losses in capture and transport, and failure of manatees to breed in captivity.
Bertram, George Colin Lawder (detail)
1963In search of mermaids: the manatees of Guiana.
London, Peter Davies; New York, Thomas Y. Crowell Co.: xi + 183.
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Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1963The status of manatees in the Guianas.
Oryx 7(2/3): 90-93. Aug. 1963.
—Reviews the status and distribution of T. m. manatus in British Guiana, its use for meat and for weed control, and the impracticability of expanding the latter use. Makes recommendations for manatee conservation in the Guianas.
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1964bDoes the "extinct" sea cow survive?
New Scientist 24(415): 313. 1 fig. Oct. 29, 1964.
—Pop. acc. of the presumed extermination and possible survival of Steller's sea cow.
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1964aManatees in the Guianas.
Zoologica (New York) 49(2): 115-120. Summer 1964.
—Describes the distribution, habits, and status of T. m. manatus in British Guiana and adjacent areas.
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1965Seaweed into beef.
Animals 6(13): 352-355. 7 figs.
—Gen. acc. of sir. natural history.
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1966cDugongs in Australian waters.
Oryx 8(4): 221-222. Apr. 1966.
—Dugongs reported to be doing well in Australia, and little hunted except by Aborigines.
Bertram, Cicely Kate Ricardo; Bertram, George Colin Lawder (detail)
1966bSea cows could be useful.
Sea Frontiers 12(4): 210-217. 5 figs. July-Aug., 1966.
—Pop. acc. of sir. status and use for weed control and other purposes; figs. of dugongs, tusks, harpoons, and seagrass.
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1966aThe dugong.
Nature (London) 209(5026): 938-939. Feb. 26, 1966.
—Optimistic report of dugong status in Australia and neighboring regions; hunting pressure believed to be diminishing in many places, and stocks seem secure.
Bertram, Cicely Kate Ricardo; Bertram, George Colin Lawder (detail)
1966dThe Sirenia: a vanishing order of mammals.
Animal Kingdom 69(6): 180-184. 4 figs. Dec. 1966.
—Pop. acc. of sirs. and the prospects for their survival, with one photo of T. manatus, two of dugongs, and a sketch of Steller's sea cow from G. M. Allen (1942).
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1968bBionomics of dugongs and manatees.
Nature (London) 218(5140): 423-426. 3 figs. May 4, 1968 (read to Linnean Soc., Feb. 15, 1968).
—Gen. acc. of sirs. and their conservation, emphasizing Australian dugongs and Guyanese manatees.
Bertram, Cicely Kate Ricardo; Bertram, George Colin Lawder (detail)
1968aThe Sirenia as aquatic meat-producing herbivores. In: M. A. Crawford (ed.), Comparative nutrition of wild animals.
Symp. Zool. Soc. London No. 21: 385-391; discussion, 393-394. 2 figs. Symposium held Nov. 10-11, 1966.
—Discusses sir. ecology, economic uses, and conservation.
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1968cThe world's most valuable reptiles.
Animals 10(10): 440-444. Feb. 1968.
—Compares sea turtles with sirs. as marine herbivores.
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1970bDugongs in Ceylon.
Oryx 10(6): 362-364. 2 figs. Dec. 1970.
—Reports that dugongs are decreasing in Ceylon due to accidental netting, in spite of legal protection, and advocates creation of a dugong sanctuary.
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1970aThe dugongs of Ceylon.
Loris 12(1): 53-55. June 1970.
—Discusses problems of dugong conservation (particularly marked decline due to intensification of the marine fishery), summarizes present status, and urges establishment of a dugong sanctuary.
Bertram, Cicely Kate Ricardo; Bertram, George Colin Lawder (detail)
1971The decline of the dugong.
Austral. Nat. Hist. 17(4): 146-147. 1 fig. Dec. 1971.
—Pop. acc. of Australian dugongs. Mentions use of dugong oil in a Queensland hospital for medicinal purposes as late as 1965.
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1973The modern Sirenia: their distribution and status.
Biol. Jour. Linn. Soc. 5(4): 297-338. 2 figs. Pl. 1. Dec. 1973.
—An excellent and detailed review, based on wide travel and correspondence, of the present distribution of sirs., population trends, economic use and past exploitation, present hunting and hunting techniques, accidental catch, use in weed control, and existing and needed conservation measures. Rather more emphasis is placed on dugongs than on manatees. Includes an analysis of data on size, sex, pregnancy, and month of capture of some 433 dugongs taken at Numbulwar Mission, Northern Territory, Australia, in 1963-69 (333-335); limited evidence for a breeding season was found.
Bertram, George Colin Lawder (detail)
1974Conservation of Sirenia: current status and perspectives for action.
Occas. Paper, Internatl. Union Conserv. Nature & Nat. Resources (Morges, Switzerland) No. 12: 1-19.
—Gen. acc. of sir. biology and status, with recommendations regarding the proposed International Manatee Research Centre in Guyana and conservation needs of each of the living species, especially dugongs in Australia and Somalia. Written as a discussion paper for the recently formed IUCN Sirenia Specialist Group.
Charnock-Wilson, John P.; Bertram, Cicely Kate Ricardo; Bertram, George Colin Lawder (detail)
1974The manatee in Belize.
Belize Audubon Soc. Bull. 6(1): 1-4. Mar. 1974.
—Abstr.: Oryx 13(3): 230, Feb. 1976.
Bertram, George Colin Lawder; Sale, J. B. (detail)
1975Dugong meeting in Nairobi.
East Afr. Wildl. Jour. 13(3/4): 389-390. Dec. 1975.
—Report of meeting and recommendations for further research and conservation efforts.
Bertram, George Colin Lawder (detail)
1975Save the mermaids.
Wildlife, Wildl. Conserv. Yearbook 1975: 82-87. 1 fig. 5 pls.
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Bertram, George Colin Lawder (detail)
1977Sea cows.
Bull. Emirates Nat. Hist. Group (Abu Dhabi) No. 1: 3-4. Mar. 1977.
—Summary of popular lecture on sirs., with mention of captures at Abu Dhabi.
Bertram, George Colin Lawder; Bertram, Cicely Kate Ricardo (detail)
1977The status and husbandry of manatees Trichechus spp.
Internatl. Zoo Yearbk. 17: 106-108.
—Briefly reviews the history and status of manatee weed-control attempts in Guyana and Surinam, and the Guyana manatee research project; urges creation of a captive-breeding program and discusses problems of weed-control and captive-breeding efforts.
Bertram, George Colin Lawder (detail)
1980Dugongs in the nineteen-seventies.
Spolia Zeylanica 35(I/II): 219-221.
—Gen. acc. of dugong and manatee research and conservation.
Bertram, George Colin Lawder (detail)
1981Dugong numbers in retrospect and prospect. In: H. Marsh (ed.), The dugong. Proceedings of a seminar/workshop held at James Cook University of North Queensland 8-13 May 1979 (q.v.).
[Townsville (Australia)], James Cook Univ. (vii + 400): 1-7.
—Briefly sketches what is known of the past abundance of dugongs, calls attention to the effects of human population pressure, and emphasizes the critical responsibility of Australia in dugong conservation. Suggests that Queensland was the area of greatest dugong abundance in the world even in prehistoric times.
Bertram, George Colin Lawder (detail)
1987Antarctica, Cambridge, conservation and population: a biologist's story.
Publ. by the author: viii + 208.
—Tells the story of Colin and Kate Bertram's studies of sirs. (82, 108, 112-125, 197, 199).
Frazier, John; Bertram, George Colin Lawder; Evans, Peter G. H. (detail)
1987Turtles and marine mammals. In: A. J. Edwards & S. M. Mead (eds.), Key environments: Red Sea.
Oxford, Pergamon Press: 288-314.
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