00000nam 2200000zi 4500 9.925073 CaOODSP 20230803122907 m o d f cr bn |||||||| 230714e197708 nfcbd obts f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-nf Fs97-4/1425E-PDF Wheeler, John P., 1955- author. Aspects of the biology of the brook trout, salvelinus fontinalis (Mitchill) 1815, in the Valley River, Labrador / J.P. Wheeler. St. John's, Newfoundland : Fisheries and Marine Service, Department of Fisheries and the Environment, August 1977. 1 online resource (iv, 19 pages) : graphs, maps text txt rdacontent computer c rdamedia online resource cr rdacarrier Fisheries and Marine Service manuscript report ; no. 1425 Digitized edition from print [produced by Fisheries and Oceans Canada]. At head of title: Fisheries Research Board of Canada. Includes bibliographical references (pages 6-7). A sample of 130 brook trout from the Valley River were studied with respect to size and age structure, growth rates, reproductive biology and food habits. The maximum age recorded was 5+ years, with 92% of the fish in the 2+ and 3+ age groups. The fish ranged in length from 7.5 to 28.9 cm, with a mean fork length of 16.8 cm. The greatest increment in length occurred during the first year of life, while the largest weight increments occurred in the later years. The weight increased as the 2.9026 power of the length. The overall sex ratio was close to 1:1. Both male and female brook trout were predominantly mature at age 2+. Ovaries from fish 12.3 - 23.9 cm in length contained an average of 214 eggs (range of 71-848). Benthic fauna, particularly immature insects, constituted the bulk of the diet. Diptera (blackfly) larvae occurred in a large number (66%) of stomachs. Includes abstracts in English and French. Brook trout Physiology Newfoundland and Labrador Valley River. Trout fisheries Newfoundland and Labrador Valley River Management. Omble de fontaine Physiologie Terre-Neuve-et-Labrador Valley, Rivière. Truites Pêche commerciale Terre-Neuve-et-Labrador Valley, Rivière Gestion. Technical reports lcgft Rapports techniques rvmgf Canada. Fisheries and Marine Service, issuing body. Fisheries Research Board of Canada, issuing body. Manuscript report (Canada. Fisheries and Marine Service) no. 1425. (CaOODSP)9.924185 PDF 801 KB https://publications.gc.ca/collections/collection_2023/mpo-dfo/fs97-4/Fs97-4-1425-eng.pdf