A Sperm Whale Stranding on Nootka Island
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NOVEMBER The Victoria DECEMBER 1991 NATURALIST VOL 48.3 [~M The Victoria DEADLINE FOR SUBMISSIONS Our Cover FOR NEXT ISSUE: Nov. 22, 1991 Contents mk NATURALIST Send to: Warren Drinnan, Editor, By Bruce Rowles 1863 Oak Bay Avenue, Victoria, B.C. V8R 1C6. Phone: Home-652-9618, Work-598-0471. his month's cover art of a greater scaup is by Published six times a year by the Sperm Whale Stranding TBruce Rowles, a local artist who presently lives in VICTORIA NATURAL HISTORY SOCIETY GUIDELINES FOR SUBMISSION on Nootka Island Whistler, B.C. After completing a two year art course at P.O. Box 5220, Station B, Victoria, B.C. V8R 6N4 Capilano College, he began to specialize in airbrush art Members are encouraged to submit articles, field trip reports, ByPamStacey.«„ and produces a variety of nature and ski-related paintings. Contents © 1991 as credited. birding and botany notes, and book reviews with photographs or ISSN 0049 - 612X Printed in Canada illustrations if possible. Photographs of natural history are ap• Rowles is also an avid photographer which he uses as preciated along with documentation of location, species names and a basis for some of his work. His line drawings and Chair, Publications Committee: Michelle Choma, Home — Dolphin and \ a date. Please label your submission with your name, addresr. and airbrushed cards have been carried by the Royal British 652-8212 phone number and provide a title. We will accept and use copy in By Robin Bail Columbia Museum and the Vancouver Art Gallery. Editor: Warren Drinnan, Work-598-0471, Home-652-9618 almost any legible form but we encourage submission of typed, Air brush art involves the use of a high-pressure Managing Editor: Diana Jolly, 388-4259 double-spaced copy or an IBM compatible word processing file on compressor to deliver paint through very fine tips Editorial Team: Patricia Freeman, Bev Glover, Richard a 360K. 5.25" diskette plus printed output. Having copy submitted (analogous to spray painting). Different colours (including on diskette saves a lot of time and work for the publications group Book Review Watts, Alan Burger, Dannie Carsen background colours) are applied by cutting out those com• and we really appreciate the help. If you have an obscure or very By Warren 1 Advertising: Jennifer Emms, 479-6323 ponents for painting then reinserting them into the picture. Distribution: Lyndis Davis, Connie Hawley, Tom Gillespie old word processing program, call the editor, Warren Drinnan, at 598-0471 or 652-9618, or save the text in ASCII format. Blank Air brushing is then used to blend the sections into a Desktop Publishing: Robert Allington, 595-7803 diskettes may be obtained from the editor and we will return any complete painting. Opinions expressed by contributors to Hie Victoria Naturalist of your own diskettes submitted. Photos and slides submitted may In addition to the cover, Bruce's work is shown on the are not necessarily those of the Society. be picked up at the Field-Naturalist, 1241 Broad Street, or will be back cover. Two pen and ink drawings, on pages 9 and 15, were VICTORIA NATURAL HISTORY SOCIETY returned if a stamped, self-addressed envelope is included with the also done by the artist. material. Honorary Life Members: Miss E.K. Lemon, Mr. A. Douglas Turnbull, Mrs. L.E. Federation of British Columbia Chambers, Mrs. Peggy Goodwill, Mr. Vic Goodwill. VNHS MEMBERSHIP Officers: 1991-92 For membership information and renewal, please contact Tom PRESIDENT: Mike McGrenere, 658-8624 Gillespie at 361-1694, or write to Membership Committee c/o VICE-PRESIDENT: Wally Macgregor, 658-8956 The Victoria Natural History Society, Box 5220, Victoria, B.C., PAST-PRESIDENT: Betty Kennedy 592-2070 V8R 6N4. 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Museum: Mary Richmond, 1/4 Page $40 3.25 x 4.675 in. 385-0504 1/8 Page $25 3.25 x 2.25 in. 14 • 60 POWER Birding Trips: Wally Macgregor, 658-8956 Birder's Night: Bryan Gates, 598-7789 Guidelines • STORES IN ITS OWN Swan Lake: Margaret MacKenzie-Grieve, 477-2402 1. Ad copy should be typeset and camera ready, not jus' ... 14 BASE WITH Annual Dues sketched or typed on a typewriter. Includes The Victoria Naturalist and B.C. Naturalist 2. Minor alterations to existing advertisements will cost ACCESSORIES (May, 1991 through December, 1991) $10. Typesetting of ads is charged at $20 per hour. Regular $21.00 Golden Age $20.00 3. Add $9 per photo for PMT (at Island Blueprint). $29.95 Family $26.00 Junior Subscriber $4.00 4. Advertising fees due and payable when copy (Any donation in excess of the above fees is income submitted. Please submit a cheque. tax deductible) Victoria Eaton Centre 384-5313 RARE BIRD ALERT: 592 3381 Submit Advertising to: VNHS EVENTS TAPE: 479-2054 Jennifer Emms, 5409 West Saanich Road, R.R.5, Vic• 1889 Oak Bay Avenue 595-0033 toria, B.C., V8X 4M6. (Phone: 479-6323 or 385-4212) The Victoria Naturalist Vol. 48.3 (1991) 3 2 The Victoria Naturalist Vol. 48.3 (1991) A Sperm Whale Stranding our expedition. All three had helped out with this sort of thing ments were then taken. When there is similar information piece together the story of what may have caused the animal's before, dealing with other carcasses on the isolated beaches of collected over a large geographic area, these morphometric death. Often we don't hear about, and subsequently reach, an the west coast or assisting us with a porpoise post-mortem when data can be used to look at size variations in different regions animal for several days after it has died. By then the organs have on Nootka Island visiting Victoria. to possibly help delineate stocks of animals that may be generally decomposed to the point where histopathology ex• After leaving the lightstation we flew west, low over the reproductively isolated. The whale, at 5.5 metres, was not much amination is not extremely revealing. Only in a few cases is there Pam J. Stacey rugged coast of Nootka Island, passing close by the sea otter longer than the reported neonatal length of sperm whales an obvious infection, abnormal growth, or other condition to colony at Bajo Reef. Upon reaching Nuchatlitz Inlet we fol• (3.5-5.0 m). Birth usually occurs in summer or fall and calves point to the cause of death. In this case, all the organs had ay 28th, 1991 dawned cold and wet, and the clouds lowed the waterway as it cut inland and as we passed Benson are weaned when about seven metres long, at one to two years deteriorated almost beyond the point of recognition, leading us M' hun g low over Tahsis Inlet. The prospects at that Point, we sighted the whale on the beach beyond. From the of age (Leatherwood et al., 1988). to believe that the whale had been dead for two weeks or more. point didn't seem favourable for making a helicopter run to square shape of the head we knew immediately that it was Blubber thickness measurements Much of the intestine remained, however, Nootka Island where, according to reports from fishermen, indeed a sperm whale. After dropping us off, the pilot flew back were taken at several locations on the and one portion in particular, distended a whale carcass lay rotting on a beach. The Stranded Whale to check on the work crew, assuring us that he would come back body. These data, when compared to far beyond its normal state with solid and Dolphin Program had received a call a few days pre• to get us. The tide was low, and we'd have a few hours to work other animals of a similar size, can reveal material, suggested the distinct possibility vious, and from the description it sounded like the small before the whale would be immersed in water. some information about health of the that this whale had died from complica• tions arising from an obstructed lower in• sperm whale that had possibly been seen in the area in the The whale had obviously been dead for some time. It was individual. The next step was to do a testine. previous weeks, swimming in the company of a larger animal. still intact, although it wasn't surprising that there had been no tooth count, but the teeth had not yet The whale had apparently been on the beach for several scavengers as yet; the hide of a sperm whale is supposedly the erupted above the gumline in this young If the organs had been in better days, and even if not fresh, there was valuable biological toughest of any cetacean and in adults can reportedly only be animal. In fact, this whales's teeth shape, samples would have been taken of information to be gathered from it.