. The Canadian field-naturalist. Natural history; Sciences naturelles. 356 The Canadian Field-Naturalist Vol. 119. Figure 1. Location of Greenland Shark sightings in the St. Lawrence River in the vicinity of Baie-Comeau, Prov- ince of Quebec. Results Of the 10 shark encounters, the range in estimated length was from to m total length (mean = m +/- m CI 95%). In four sharks sex was determined (3 female, 1 male), with one markedly "girthy" m female shark believed to be gravid. In one instance three sharks were seen separately on the same dive and in one instance tw
. The Canadian field-naturalist. Natural history; Sciences naturelles. 356 The Canadian Field-Naturalist Vol. 119. Figure 1. Location of Greenland Shark sightings in the St. Lawrence River in the vicinity of Baie-Comeau, Prov- ince of Quebec. Results Of the 10 shark encounters, the range in estimated length was from to m total length (mean = m +/- m CI 95%). In four sharks sex was determined (3 female, 1 male), with one markedly "girthy" m female shark believed to be gravid. In one instance three sharks were seen separately on the same dive and in one instance two sharks were ob- served simultaneously within 5 meters of each other on diverging courses. Shark swimming speeds ranged from m/s to peak at m/s (mean = m/s +/- m/s 95% CI). Greenland Sharks were capable of rapid acceleration from m/s to m/s and could outpace divers when swimming in a straight line, were highly manoeuvrable and were capable of changing depth and direction rapidly. In one case, the same m female shark identified by scar patterns was seen repeatedly over a 3-day period in the same location, in each case within 50 m of the same posi- tion when encountered. Female sharks were noted to have more scarring than males, generally linear scar- ring on the tail, pectoral fins and dorsum of the cau- dal peduncle. We postulate that these scars may have resulted from nuptial or combat related behaviour, as observed in other shark species (Compagno 1984).. 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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