00000nam 2200000za 4500 9.812141 CaOODSP 20200330190507 ta 160301s2016 bccdb # b f000 0 eng d 978-0-660-04731-7 978-0-660-04732-4 CaOODSP eng eng fre n-cn-bc Fs97-6/3159E Fs97-6/3159E-PDF A comparative bioenergetics analysis of seasonal growth of juvenile Sockeye Salmon and their consumption of zooplankton in Great Central Lake and Sproat Lake, British Columbia, during 1999 / K.D. Hyatt ... [et al.]. Nanaimo, BC : Fisheries and Oceans Canada, 2016. vii, 50 p. : maps, graphs ; 28 cm. Canadian technical report of fisheries and aquatic sciences, 0706-6457 ; 3159 Includes bibliographical references. "Great Central Lake (GCL) and Sproat Lake are important Vancouver Island sockeye salmon nursery lakes. In most years since 1970, GCL has been treated with inorganic fertilizer additions and Sproat Lake has not. Our goal in 1999 was to estimate sockeye fry carrying capacity for both lakes. Our method was to compare consumption of zooplankton by juvenile sockeye with production by all of the zooplankton species observed in their diets. We found that GCL fry consumption averaged 130 g ha-1 d-1 wet weight (ww), which equalled 0.5% d-1 of prey standing stock and 8 to 81% d-1 of prey production. Sproat Lake fry consumed 400 g ha-1 d-1 ww in the spring declining through the summer-fall to < 100 g ha-1 d-1 ww, averaging 1.1% d-1 of prey standing stock and 2 to >100% d-1 of prey production. We conclude that in both lakes there was excess capacity for increased fry densities, and that the fall was the period when consumption by fish was most likely to exceed production by their zooplankton prey"--Abstract. Text in English, abstract in English and French. gccst Freshwater fish gccst Fisheries resources Hyatt, K. D. (Kim Dennis), 1947- Canada. Department of Fisheries and Oceans. A comparative bioenergetics analysis of seasonal growth of juvenile Sockeye Salmon and their consumption of zooplankton in Great Central Lake and Sproat Lake, British Columbia, during 1999 (CaOODSP)9.812152 Canadian technical report of fisheries and aquatic sciences, 0706-6457 ; 3159. (CaOODSP)9.514691