Ian takes tissue samples from fish collected in an estuary of the River Ntem, Cameroon.

Publications
Harrison, I.J. & M.L.J. Stiassny, 1999. The Quiet Crisis: A Preliminary Listing of the Freshwater Fishes of the World That Are Extinct or "Missing in Action". In R. MacPhee (ed.), Extinctions in Near Time: Causes, Contexts, and Consequences, p. 271-332. New York: Kluwer Academic/Plenum Publishers. 

Harrison, I.J., 1996. Interface areas in small fish. Symposia of the Zoological Society of London 69: 15-45.

Serventi, M., I.J. Harrison, P. Torricelli & G. Gandolfi, 1996. The use of pigmentation and morphological characters to identify Italian mullet fry. Journal of Fish Biology 49: 1163-1173.

Harrison, I.J. & G.J. Howes, 1991. The pharyngobranchial organ of mugilid fishes; its structure, variability, ontogeny, possible function and taxonomic utility. Bulletin of the British Museum (Natural History) Zoology Series 57: 111-132.

Harrison, I.J., 1989. Specialization of the gobioid palatopterygoquadrate complex and its relevance to gobioid systematics. Journal of Natural History 23: 325-353.