. Il campo Canadese-naturalista. 1990 Lien, Barry, Breeck e Zuschlag: Sowerby di balene dal becco 415 Davidsville. La Norris balena braccio non era stato disturbato e era intatto. Queste attività, il tempo tra la morte e l'esame e l'immediata meteo e condizioni ambientali, ha interessato la misura di esame delle balene morte. Procedure di esame come raccomandato dal Myrick (1986) e la lepre e Meade (1987) sono state seguite per quanto possibile; le misurazioni sono state fatte in seguito Leatherwood et al. (1982). L'invecchiamento degli animali è stata tentata da entrambi cross e longitudinalmente il sezionamento a a
1636 x 1526 px | 27,7 x 25,8 cm | 10,9 x 10,2 inches | 150dpi
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. The Canadian field-naturalist. 1990 Lien, Barry, Breeck, and Zuschlag: Sowerby's Beaked Whales 415 Davidsville. The Norris Arm whale had not been disturbed and was intact. These activities, the time between death and examination and the immediate weather and environmental conditions, affected the extent of examination of the dead whales. Examination procedures as recommended by Myrick (1986) and Hare and Meade (1987) were followed as far as possible; measurements were made following Leatherwood et al. (1982). Aging of the animals was attempted by both cross and longitudinally sectioning a tooth from each of the four specimens. Using suggestions by Perrin and Myrick (1980), the exposed surfaces were etched with 10% formic acid. Varying the time intervals of acid application was attempted as well as varying the wash times. An alternative approach of mounting thin sections on glass slides to allow microscopic examination was also used. The teeth were sliced by a diamond blade trim saw. One surface was ground flat using progressively finer grades of grinding powder before being affixed to the slides with glue. Once the tooth was firmly attached, the other side was ground with a diamond grinding wheel. During the examining of the prepared samples under a microscope, a solution of 75:25 ethanohglycerine was applied to enhance the growth ring readability. Independent counts of the GLG (growth layer groups) were made from preparations of all the extracted teeth by four observers. Results Stranding Accounts: Multiple strandings oi M. bidens occurred near Carmanville and Norris Arm, Newfoundland. Locations of the strandings are shown in Figure 1. On 29 August 1986, a small group of whales, believed to be "potheads or dolphins" were sighted in the harbor at Carmanville, Newfoundland (49° 24'N, 54° 18'W) (Figure 2). Animals within the group appeared to observers to be all about the same size; none were noticeably larger or smaller than the rest. The whales behaved
