00000nam 2200000za 4500 9.800171 CaOODSP 20221107134553 cr ||||||||||| 150424s2015 bccb ob f000 0 eng d 978-0-660-02016-7 978-0-660-02016 978-0-660-02015-0 CaOODSP eng eng fre n-cn--- Fs97-13/1258E-PDF Fs97-13/1258E Methods and summary data for limnology and food web structure in Osoyoos Lake, B.C. (2005-2013) [electronic resource] / by K.D. Hyatt ... [et al.]. Méthodes et données sommaires relatives à la limnologie et à la structure du réseau trophique du lac Osoyoos, en Colombie-Britannique (2005-2013) Nanaimo, BC : Fisheries and Oceans Canada, 2015. vi, 71 p. : maps Canadian data report of fisheries and aquatic sciences, 1488-5395 ; 1258 Incorrect ISBN (978-0-660-02016) printed in this publication. Includes bibliographical references (p. 64-68). In 1994, the Okanagan Nation Alliance approached Fisheries and Oceans Canada with a request for assistance in status and trend assessments to support stock and habitat restoration work focused on Okanagan sockeye salmon that appeared to have fallen to historic lows of abundance. In the following years, several collaborative habitat and stock restoration projects were initiated to facilitate rebuilding of the Okanagan sockeye salmon population to historic abundance levels. Here we provide a detailed site-description and report on field survey and sample processing methods used on Osoyoos Lake to assess: (1) limnological conditions (temperature, oxygen, water transparency, nutrient concentrations, plankton community structure etc.) in the principal nursery lake, (2) annual to seasonal changes of abundance and biological traits of juvenile sockeye salmon, and (3) abundance of other limnetic fish species. Monthly or sub-monthly survey work was especially intensive during the years 2005-2013 when detailed field observations were required to serve as: (a) critical response variable observations to determine whether DFO recommended increases in abundance of adult sockeye spawning in the Okanagan River (Hyatt and Rankin 1999) were accompanied by proportionate increases in abundance levels of fry recruiting to Osoyoos Lakeand subsequent production of both smolts and returning adults, (b) “control” observations of seasonal to annual patterns of growth and survival of wild-origin, sockeye fry relative to hatchery-origin fry introduced into either Skaha or Osoyoos lakes as part of an Okanagan Nation Alliance stock restoration project and (c) “test interval” observations to monitor annual production of wild fry and smolts following the 2004 deployment of a fish-and-water management tools (FWMT) decision support system to improve “fish friendly” water management decisions for the Okanagan River and Lake system (Hyatt et al.2015). Annual to seasonal observations obtained from Osoyoos Lake are documented in the current report while comparative observations from Skaha Lake are published in a companion Data Report (Hyatt et al.2015). Issued also in printed form. Text in English, abstract in English and French. gccst Fisheries management gccst Aquatic ecosystems Hyatt, K. D. (Kim Dennis), 1947- Canada. Department of Fisheries and Oceans. Methods and summary data for limnology and food web structure in Osoyoos Lake, B.C. (2005-2013) / (CaOODSP)9.800170 Methods and summary data for limnology and food web structure in Osoyoos Lake, B.C. (2005-2013), revised (CaOODSP)9.835148 Canadian data report of fisheries and aquatic sciences, 1488-5395 ; 1258. (CaOODSP)9.505124 PDF 1.79 MB https://publications.gc.ca/collections/collection_2016/mpo-dfo/Fs97-13-1258-eng.pdf