POPULATION DYNAMICS OF DUCKS AND GEESE 93 



2. Additional Species in Table I 



Anser anser. Boyd (1957c) and unpublished. 



A. alhifrons fiavirostris Dalgety & Scott. Boyd (1958). 

 Branta c. canadensis (L.). Unpublished English data. 



B. h. hemicla (L.) and B. b. hrota (O. F. Muller). Boyd (1959). 

 Anas a. acuta L. Tamantseva & Shevareva (i957)» recalculated. 

 A. c. crecca L. Boyd (1956). 



A. crecca caroUnensis Gmelin. From published recoveries. 



A. penelope L. From unpublished British and published Icelandic recoveries. 



A. clypeata L. From unpublished British data. 



Somateria m. moUissima (L.) PubHshed Swedish and Dutch, and unpublished 



British, recoveries. 

 Aythyaferina (L.). From unpubhshed British data. 

 Aix sponsa (L.) Stewart (195?) • 



Melanitta n. nigra (L.). From published Icelandic recoveries. 

 Clangula hy emails (L.). From published Swedish, Icelandic and Russian 



recoveries. 

 Mergtis m. merganser (L.). From pubhshed Swedish and British recoveries. 



Information on adult weights taken from Kortright (i943)» Elder (i955) 

 and unpublished material. 



Original calculations of survival from recoveries followed the maximum- 

 likelihood method of Haldane (i955)- 



REFERENCES 



Atwood, E. L. (1959). A report on the canvashack and redhead retrieved shooting kill during the 1958-59 

 season. Section of Wildlife Biometry, Bureau of Sport Fisheries and Wildlife, August 1959. 



Austin, O. L. (Jr.) (1957). Review of Boyd (1957^). Bird-Banding, 28, 232. 



Bellrose, F. C. & Chase, E. B. (1950). Population losses in the mallard, black duck and blue- 

 winged teal. Biol. Notes Urbana, Illinois.. No. 22, 27 pp. 



Bennett, L. J. (1938). The blue-winged teal, its ecology and management. Ames, Iowa. 144 pp. 



Boyd, H. (1956). Statistics of the British population of the pink-footed goose. J. Anim. Ecol, 25, 



253-73- 

 Boyd, H. (1957^1). Mortality and kill amongst British-ringed teal Anas crecca. Ibis, 99, 157-77- 

 Boyd, H. (1957^). Mortality and fertility of the white-fronted goose. Bird Study, 4, 80-93. 

 Boyd, H. (1957O. Recoveries of British-ringed greylag geese. Rep. Wildf. Tr., 8, 51-54. 

 Boyd, H. (1958). The survival of white-fronted geese (Anser albifrons Jlavirostris Dalgety & Scott) 



ringed in Greenland. Dansk. orn. Foren. Tidsskr., 52, 1-8. 

 Boyd, H. (1959). The composition of goose populations. Ibis, loi, 441-5. 

 Boyd, H. & King, B. (i960). A breeding population of the mallard. Rep. Severn Wildf. Tr., ii, 



137-43- 

 Capildeo, R. & Haldane, J. B. S. (1954). The mathematics of bird population growth and 



decline. J. Anim. Ecol, 23, 215-23. 

 CoocH, F. G. (1958). The breeding biology and management of the blue goose Chen caerulescens, 



Ph.D. thesis, Cornell U. Abstract in Wildl. Rev., 96, 65. 

 Dementiev, G. p. & Gladkov, N. A. (eds.) (1952). The Birds of the Soviet Union, vol. 4, 640 pp. 



Moscow (in Russian). 



