00000nam 2200000zi 4500 9.950327 CaOODSP 20250528081605 m o d f cr mn||||||||| 250423e198108##bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc x7x7 Fs97-4/1614E-PDF Fs97-4/1614 Morley, R. B., author. Adult sockeye escapements to Sproat Lake and Great Central Lake (Somass River system, Port Alberni, B.C.) in 1979 / by R. Bruce Morley. Nanaimo, British Columbia : Department of Fisheries and Oceans, Resource Services Branch, Pacific Biological Station, August 1981. ©1981 1 online resource (v, 68 pages) : illustrations, map. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 1614 Pages iv and 2 are wanting in this publication copy. Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (page 52). "The sockeye escapement to Sproat Lake in 1979, estimated on the basis of partial visual counts, was 76,446. The estimated escapement to Great Central Lake, based mainly on counts obtained from an automatic counter, was 263,995. Entry of sockeye into Sproat Lake began and ended about 2 wk earlier than at Great Central Lake; at both locations peak periods of passage were associated with high water levels in early July and early September. Diurnal migration patterns differed at the two counting sites. Peak passage generally occurred earlier in the morning at Great Central Lake than at Sproat and the proportions of the daily runs passing at night reached much higher levels at Great Central Lake. The considerable variation in diurnal migration patterns at both locations was not completely random and allowances were made for this when making estimates based on partial visual counts. Some observations on the passage of other salmon species were also made"--Abstract, page v. Includes abstracts in English and French. Escapement (Fisheries) British Columbia Vancouver Island. Sockeye salmon Counting British Columbia Vancouver Island. Sockeye salmon Migration British Columbia Vancouver Island. Échappée (Pêches) Colombie-Britannique Vancouver, Île de. Saumon rouge Comptage Colombie-Britannique Vancouver, Île de. Saumon rouge Migration Colombie-Britannique Vancouver, Île de. Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian manuscript report of fisheries and aquatic sciences ; no. 1614. (CaOODSP)9.505211 PDF 1.50 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1614-eng.pdf