00000cam 2200000za 4500 9.855271 CaOODSP 20241203113642 cr ||||||||||| 180416s1973 onca| #o f00| 0 eng d CaOODSP eng eng fre n-cn--- CW69-1/5E-PDF Manning, T. H. (Thomas Henry), 1911- Age determination in the polar bear Ursus maritimus Phipps [electronic resource] / by T.H. Manning. Ottawa : Environment Canada, Canadian Wildlife Service, c1973. 12 p. : ill. Occasional paper ; no. 5 Digitized edition from print [produced by Environment and Climate Change Canada]. First printing 1964. Includes bibliographical references. "Skull criteria are given for aging of Polar Bears up to six years, by which time they are considered fully grown. Most characters develop earlier in females than in males. Sexual maturity is probably reached by males early in their fourth year, and by females possibly early in their third. Weights of 13 bacula are given"--Abstract. Includes abstract in French. gccst Wildlife gccst Nature conservation Polar bears Canada. Environment Canada. Canadian Wildlife Service. Occasional paper (Canadian Wildlife Service) no. 5 (CaOODSP)9.504780 PDF 747 KB https://publications.gc.ca/collections/collection_2018/eccc/CW69-1-5-eng.pdf