. The Canadian field-naturalist. 250 The Canadian Field-Naturalist Vol. 100 Table 3. Median dates of male and female catch (1980-1983). 1980 1981 1982 1983 Female Male % total catch sexed N Range Median 7 28/6-6/9 11 July 19 26/6-21/8 6 July 4 28/6-23/7 8 July 6 1/8-7/9 13 July N Range Median 11 1/7-27/8 22 July 42 15/6-20/8 2 July 6 12/6-II/8 30 July 23 14/6-15/7 8 July 35 55 29 20 Table 4. Length (m) of male and female Basking Sharks. Sex Mean length Std. Dev. Range Male Female 40 27 water. In some years, like 1982, incidental catches of Basking Sharks on
. The Canadian field-naturalist. 250 The Canadian Field-Naturalist Vol. 100 Table 3. Median dates of male and female catch (1980-1983). 1980 1981 1982 1983 Female Male % total catch sexed N Range Median 7 28/6-6/9 11 July 19 26/6-21/8 6 July 4 28/6-23/7 8 July 6 1/8-7/9 13 July N Range Median 11 1/7-27/8 22 July 42 15/6-20/8 2 July 6 12/6-II/8 30 July 23 14/6-15/7 8 July 35 55 29 20 Table 4. Length (m) of male and female Basking Sharks. Sex Mean length Std. Dev. Range Male Female 40 27 water. In some years, like 1982, incidental catches of Basking Sharks on Cape Breton Island, Nova Scotia, are large (J. Smith, personal communication) and these may be from the same stock as animals caught in Newfoundland. This hypothesis could be tested by tagging and recapture. Captures of immature animals were low (), occurred primarily later in the summer, and were concentrated in water off eastern Newfoundland. While these animals feed on plankton similar to that eaten by adults, they may be generally found in deeper water and are less likely to be caught. It is also probable that because of their smaller size, they are less likely to be reported. If sexual activity is the primary purpose of the inshore migration, then immature Basking Sharks may have a different summer distribution than the adults. Acknowledgments We would like to acknowledge Fisheries and Oceans Canada and the Newfoundland and Labrador Department of Fisheries for financial support of this work. Assistance with field work was given by Dave Aldrich, Lisa Baraff, Sue Staniforth, Dong Jin hai, Cheryl Hendrickson, Greg Keith, Ralph Owen, Inge Hindle, Alan Knoerr, Iris Silverstein, Maren Lien and others, and is gratefully acknowledged. John Green, C. C. Davis, and Hal Whitehead criticized an early draft of this manuscript and greatly improved it. Several local companies with commercial interests in Basking Sharks have been very helpful and we would especially like to acknowledg
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