00000nam 2200000zi 4500 9.950406 CaOODSP 20250528081805 m o d f cr mn||||||||| 250424e198202##bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- x8x8 Fs97-4/1638E-PDF Fs97-4/1638 Haegele, C. W., author. Diving survey assessment of 1981 herring spawn in British Columbia / by C.W. Haegele. Nanaimo, British Columbia : Department of Fisheries and Oceans, Resource Services Branch, Pacific Biological Station, February 1982. ©1982 1 online resource (iv, 39 pages) : illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 1638 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 9-10). "Diving surveys were made for 172 km of herring spawn in 1981. There was complete diving survey coverage for the North Coast Division, nearly complete coverage for the Strait of Georgia Division, and partial coverage for the Queen Charlotte Islands, Central Coast, and West Coast of Vancouver Island divisions. Diving survey data was supplemented by Fishery Officer collected spawn survey data to produce final egg estimates for the 20 sections for which there was complete or partial diving survey coverage. Approximately 60% of the spawn produced by the 1981 spawning population was estimated in this manner. Fishery Officers generally underestimated the area of spawns, which resulted in underestimates of egg deposition. The distribution of eggs by substrate type was documented and regional differences in substrate utilization were found. The relationship of length of spawn to egg abundance was examined and 200 billion eggs per km of spawn were found to occur on gradually sloping beaches. On beaches of moderate to steep slope, 9.8 to 119.1 billion eggs per km of spawn were found"--Abstract, page iii. Includes abstracts in English and French. Pacific herring Eggs British Columbia Pacific Coast. Pacific herring Spawning British Columbia Pacific Coast. Hareng du Pacifique Œufs Colombie-Britannique Pacifique, Côte du. Hareng du Pacifique Frai Colombie-Britannique Pacifique, Côte du. Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian manuscript report of fisheries and aquatic sciences ; no. 1638. (CaOODSP)9.505211 PDF 1.01 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1638-eng.pdf