Pehrsson, 0. 1979. Feeding behaviour, feeding habitat utilization, and feed- 

 ing efficiency of Mallard ducklings ( Anas platyrhynchos ) guided by a dom- 

 estic duck. Viltrevy 10: 193-218. 



Szaro, R. C. 1979. Bunker C fuel oil reduces Mallard egg hatchability . Bull. 

 Environ. Contain. Toxicol. 22: 731-732. 



White, D. H. 1979. Nationwide residues of organochlorine compounds in wings 

 of adult Mallard and Black ducks, 1976-77. Pest. Monit. J. 13: 12-16. 



1978 



Adrian, J., T. R. Spraker and R. B. Davies. 1978. Epornitics of aspergillosis 

 in Mallards Anas platyrhynchos in north central Colorado. J. Wildl. Dis. 

 14: 212-217. 



Albers, P. H. 1978. The effects of petroleum on different stages of incuba- 

 tion in bird eggs. Bull. Environ. Contam. Toxicol. 19: 624-630. 



Anderson, D. R. and K. P. Burnham. 1978. Effect of restrictive and liberal 

 hunting regulations on annual survival rates of the Mallard in North 

 America. Trans. N. Am. Wildl. Nat. Resour. Conf . 43: 181-186. 



Balthazart, J. 1978. Behavioural and physiological effects of testosterone 

 propionate and cyproterone acetate in immature male domestic ducks, Anas 

 platyrhynchos . Z. Tierpsychol. 47: 410-421. 



Batt , B. D. J. and H. H. Prince. 1978. Some reproductive parameters of Mal- 

 lards in relation to age, captivity and geographic origin. J. Wildl. 

 Manage. 42: 834-842. 



Bishop, R. A., D. A. Humburg and R. D. Andrews. 1978. Survival and homing of 

 female Mallards. J. Wildl. Manage. 42: 192-196. 



Bride, J. and L. Gomot. 1978. Changes at the ecto-mesodermal interface during 

 development of the duck preen gland. Cell Tissue Res. 194: 141-149. 



Brush, A. H. 1978. Structural aspects of the speculum of Mallard Anas platy - 

 rhynchos . Ibis 120: 523-526. 



Dieter, M. P. and D. H. White. 1978. Effects of dietary vanadium in Mallard 

 Ducks. J. Toxicol. Environ. Health 4: 43-50. 



Finley, M. T. and M. P. Dieter. 1978. Toxicity of lead-iron shot versus com- 

 mercial 18-B lead shot in Mallards. J. Wildl. Manage. 42: 32-39. 



Fuller, T. L. 1978. Mallard nests in trees. Prairie Nat. 10: 61. 



Hoffman, D. J. 1978. Embryotoxic effects of crude oil in Mallard ducks and 

 chicks. Toxicol. & Appl. Pharmacol. 46: 183-190. 



181 



