. The Canadian field-naturalist. 1985 Mansfield: Status of the Bowhead Whale 423. Figure 2. Canadian distribution of the Bowhead Whale, Balaena mysticetus. down. However, the IWC Scientific Committee expressed concern over these interpretations, believ- ing that the low number of calves observed might indicate a low recovery rate for this stock (Interna- tional Whaling Commission 1979). Food does not appear to be a limiting factor; stom- achs examined have contained small planktonic crus- taceans such as copepods, mysids, amphipods and euphausids, and on one occasion small bottom living organi
. The Canadian field-naturalist. 1985 Mansfield: Status of the Bowhead Whale 423. Figure 2. Canadian distribution of the Bowhead Whale, Balaena mysticetus. down. However, the IWC Scientific Committee expressed concern over these interpretations, believ- ing that the low number of calves observed might indicate a low recovery rate for this stock (Interna- tional Whaling Commission 1979). Food does not appear to be a limiting factor; stom- achs examined have contained small planktonic crus- taceans such as copepods, mysids, amphipods and euphausids, and on one occasion small bottom living organisms, sand and gravel (Marquette 1977; John- son et al. 1966; Lowry et al. 1978). Bowheads seek out the more productive regions in summer which necessi- tates a migratory cycle linked to seasonal changes in the pack ice. The predictability of these annual movements leaves them especially vulnerable to human disturbance and capture, both on migration and during their summer feeding sojourn. Limiting Factors Predation by man has probably been the most overwhelming factor in the reduction of this species. Although few Bowheads have been taken in the east- ern Arctic since commercial whaling stopped (1946), it is possible that continued attempts to kill them, though on a small scale, have effectively prevented any significant increase in this remnant Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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