A note on problems in estimating the number of blue whales in the Gulf of St. Lawrence from photo-identification data

Hammond, P.S., Sears, R. and Bérubé, M., 1990. A note on problems in estimating the number of blue whales in the Gulf of St. Lawrence from photo-identification data. In: Individual Recognition of Cetaceans: Use of Photo-Identification and Other Techniques to Estimate Population Parameters. Philip S. Hammond, Sally A. Mizroch, and Gregory P. Donovan (eds). IWC Rep. Special Issue 12.