00000nam 2200000zi 4500 9.949258 CaOODSP 20250408123657 m o d f cr mn||||||||| 250319e198502##bcc ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc Fs97-6/1353E-PDF Fs97-6/1353E Bilton, T. H., author. The body-scale relationship for adult sockeye (Oncorhynchus nerka), pink (O. gorbuscha), chum salmon (O. keta), and chinook salmon (O. tshawytscha) / by H.T. Bilton. Nanaimo, British Columbia : Department of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, February 1985. ©1985 1 online resource (iv, 19 pages). text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of fisheries and aquatic sciences, 0706-6457 ; no. 1353 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (page 8). "The body-scale relationship for adult sockeye, pink, chum and chinook salmon of different ages, brood years and locations was examined. Generally, the correlation coefficients between fish length and total scale radius or total number of circuli for each age of each species were low, ranging from a low of 0.191 for age 1.3 sockeye to a high of 0.606 for age 0.3 chinook. Even when ages were combined, the correlation coefficients for sockeye, pink, and chum salmon remained low, ranging from a low of 0.386 for pinks (length versus number of circuli) to a high of 0.571 for chums (length versus circuli). Only the correlation coefficients for chinook salmon were moderately high at 0.857 and 0.794 for length and scale radius, and length and circulus number, respectively. Hence, with exception of the chinooks, only very gross estimates of prior growth of the other three species can be made from examination of their scales. It is speculated that the reasons for the low correlations may be associated with the fact that scale samples from adult sockeye, pink, and chum salmon caught in the net fishery near river mouths had begun resorption of their scales with the beginning of maturity. The chinook samples on the other hand, were mainly collected from troll caught fish sometime prior to the onset of the process of maturity, hence resorption of their scales probably had not begun to occur. This would account for the higher correlation coefficients. The lines of best fit describing the relationships for sockeye and pink salmon tended to change from one brood year to the next. Similar comparisons could not be made for chinook and chum salmon as only fish from one brood year were examined. Analysis of variance testing for differences in the regression lines for sockeye, pink and chum salmon from different locations indicated, in some cases, significant differences among fish from different locations. Such differences must be related to either genetic or environmental factors, or a combination of both"--Abstract, page iii. Includes abstracts in English and French. Pacific salmon British Columbia Anatomy. Pacific salmon British Columbia Growth. Scales (Fishes) Saumons du Pacifique Colombie-Britannique Anatomie. Saumons du Pacifique Colombie-Britannique Croissance. Écailles de poisson. Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian technical report of fisheries and aquatic sciences ; no. 1353. (CaOODSP)9.504449 PDF 685 KB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-1353-eng.pdf