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Glossary
Placentas: in animals, the placenta is a temporary organ present in females during pregnancy. The placenta is the primary site of nutrition and gas exchange between the mother and the embryo.
Zooplankton: Tiny aquatic animals that drift with currents or swim weakly in water.
del Hoyo, J., Elliott, A. and Sargatal, J. (1996) Handbook of the Birds of the World. Volume 3: Hoatzin to Auks.Lynx Edicions, Barcelona.
COSEWIC. (2006) COSEWIC Assessment and Update Status Report on the Ivory Gull Pagophila eburnea in Canada.Committee on the Status of Endangered Wildlife in Canada, Ottawa.
Gilchrist, H.G. and Mallory, M.L. (2005) Declines in abundance and distribution of the ivory gull (Pagophila eburnea) in Arctic Canada. Biological Conservation, 121: 303 - 309.