. The Canadian field-naturalist. Figure 1. Photugiaph ot a tcmalc Harbour Porpoise (89 cm), taken 14 August 1970 by the author. all Harbour Porpoise sightings were outside the 2000 m depth contour (Winn 1982). Recently how- ever, Stenson and Reddin (1990) reported Harbour Porpoises over deep water in the Newfoundland Basin and the Labrador Sea. The species is notori- ously difficult to sight at any distance in even mod- erate seas, so it can be easily overlooked by inexperi- enced observers. Gaskin (1984) summarized the hemispheric distri- bution and zoogeography of the Harbour Porpoise based
. The Canadian field-naturalist. Figure 1. Photugiaph ot a tcmalc Harbour Porpoise (89 cm), taken 14 August 1970 by the author. all Harbour Porpoise sightings were outside the 2000 m depth contour (Winn 1982). Recently how- ever, Stenson and Reddin (1990) reported Harbour Porpoises over deep water in the Newfoundland Basin and the Labrador Sea. The species is notori- ously difficult to sight at any distance in even mod- erate seas, so it can be easily overlooked by inexperi- enced observers. Gaskin (1984) summarized the hemispheric distri- bution and zoogeography of the Harbour Porpoise based on information collected from 1974 to 1983. The article supplemented the extensive bibliogra- phies provided earlier by Gaskin et al. (1974), Mitchell (1975), Prescott and Fiorelli (1980) and Prescott et al. (1981). More recent information can be found in the volume of abstracts from the pro- ceedings of a conference on cetacean-fishing gear interactions held in La Jolla, California in October 1990, published by the International Whaling Commission (IWC 1990) and in articles by Barlow (1987, 1988), Broekema and Smeenk (1987), Calambokidis (1986), Diamond and Hamon (1986), Gaskin et al. (1984), Gaskin et al. (1985), Gaskin and Watson (1985), Hanan et al. (1986), Kinze (1985a, 1985b), Lansdown (1987), Noldus and de Klerk (1984), Read and Gaskin (1985, 1988), Schulze (1987), Smith and Gaskin (1983), Smith et al. (1983), van Kreveld (1987), Watson and Gaskin (1983), Watts and Gaskin (1985, 1989), Worthy et al. (1987), Yasui and Gaskin (1986) and Yurick and Gaskin (1987, 1988). The monograph by Schulze (1987) has a particularly extensive bibliography, including some European references which may be unfamiliar to many North American workers, and the review by van Kreveld (1987) also contains a num- ber of useful document references often overlooked. Figure 2. Global distribution of Phocoena phocoena shown by stippled Please note that these images are extracted from scanned pa
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