Seymour, N. R. 1977. Social aspects of reproductive behaviour in the Black 



Duck ( Anas rubripes ) in eastern Nova Scotia. Ph.D. thesis, McGill Univ./ 

 Montreal, PQ. 



Wooley, J. B. , Jr. and R. B. Owen, Jr. 1977. Metabolic rates and heart rate 

 metabolism in the Black Duck ( Anas rubripes ). Comp. Biochem. Physiol. 

 57(3A): 363-367. 



1976 



Alison, R. M. 1976. History of the Black Duck in Ontario. Ont . Field Biol. 

 30: 27-34. 



Brooke, R. K. and J. C. Sinclair. 1976. An American Black Duck in Durban. 

 Ostrich 47: 67-68. 



Daniels, B. A. and R. S. Freeman. 1976. Corrigia obscura sp. n. (Tremetoda: 

 Dicrocoeliidae) from the North American Black Duck. J. Parasitol. 62: 

 59-62. 



Johnsgard, P. A. and R. DiSilvestro. 1976. Seventy-five years of changes in 

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 908. 



White, D. H. and R. G. Heath. 1976. Nationwide residues of organochlorines in 

 wings of adult Mallards and Black Ducks, 1972-73. Pest. Monit. J. 9: 

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1975 



Jonsson, P. E. 1975. [First record of Black Duck Anas rubripes in Sweden.] 

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Reed, A. 1975. Reproductive output of Black Ducks in the St. Lawrence estuary. 

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1974 



Anon. 1974. Le canard noir. Faune Quebec 5: 1-8. 



Heath, R. G. and S. A. Hill. 1974. Nationwide organochlorine and mercury res- 

 idues in wings of adult Mallards and Black Ducks during the 1969-70 hunt- 

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Heusmann, H. W. 1974. Mallard-Black Duck relationships in the northeast. 

 Wildl. Soc. Bull. 2: 171-177. 



1973 



Longcore, J. R. and B. M. Mulhern. 1973. Organochlorine pesticides and poly- 

 chlorinated biphenyls in Black Duck eggs from the United States and Canada, 

 1971. Pest. Monit. J. 7: 62-66. 



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