+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Effect of feeding rate and gas supersaturation on survival and growth of lake trout



Effect of feeding rate and gas supersaturation on survival and growth of lake trout



Progressive Fish-Culturist 52(1): 45-50



Fingerling lake trout (Salvelinus namavcush) were reared for 35 d in water with total dissolved gas pressures of 46, 78, 108, or 159 mm Hg above ambient conditions (.DELTA.P). Within each gas pressure treatment, daily feeding rations were (1) 1.7% of the total weight of fish in the heaviest of three replicates, (2) 1.7% of the weight of fish in each individual tank, or (3) 0.9% of the weight in each tank (underfeeding). Signs of gas bubble trauma were first observed as hemorrhagic spots on the eyes of some fish reared at .DELTA.P = 46, and external evidence of trauma increased as .DELTA.P increased. All fish sampled at .DELTA.P = 159 showed signs of gas bubble disease; the most common were eye hemorrhage and bubble formation inside the mouth. Mortality was 11% or less among fish reared at gas levels up to .DELTA.P = 108. Mortality was as high as 55% at .DELTA.P = 159, but did not differ among feeding treatments. Net weight gain by fish was low at .DELTA.P = 159 because of both high mortality and slow growth. Growth was slowest for underfed fish at all gas levels, and underfed fish consistently showed increasing injury as gas pressures increased. Calculation of feeding rate on the basis of fish weight in individual tanks allowed the most cost-efficient food distribution. Culture of lake trout at .DELTA.P < 46 is recommended.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 002082334

Download citation: RISBibTeXText

DOI: 10.1577/1548-8640(1990)052<0045:eofrag>2.3.co;2


Related references

The effect of competition with yellow perch on the survival and growth of planted brook trout splake and rainbow trout in a small ontario lake. Transactions of the American Fisheries Society 107(4): 505-517, 1978

Growth rate, survival, and harvest of fingerling rainbow trout planted in Weber Lake, Wisconsin. Jour Wildlife Management 20(3): 233-239, 1956

Effect of water temperature on sea lamprey growth and lake trout survival. Transactions of the American Fisheries Society 122(6): 1161-1166, 1993

Effect of pigment content in broodstock diet on subsequent fertilization rate survival and growth rate of rainbow trout salmo gairdneri offspring. Aquaculture 53(2): 85-94, 1986

Effect of dissolved gas supersaturation on the survival and condition of juvenile rainbow trout (Oncorhynchus mykiss) under static and dynamic exposure scenarios. Canadian Technical Report of Fisheries and Aquatic Sciences (2370): i-xii, 1-70, 2002

Supersaturation bioassays with lake trout fry. 1988

Evolution of supersaturation of amorphous pharmaceuticals: the effect of rate of supersaturation generation. Molecular Pharmaceutics 10(11): 4330-4346, 2013

The effect of fin clipping on growth rate survival and sexual maturity of rainbow trout. Aquaculture 73(1-4): 383-390, 1988

Eye abnormalities of lake trout exposed to gas supersaturation. Progressive Fish-Culturist 55(3): 177-179, 1993

Survival and growth of matched plantings of lake trout (Salvelinus namaycush), brook trout (Salvelinus fontinalis), and lake X brook F1 splake hybrids and backcrosses in northeastern Ontario lakes. Ontario fisheries technical report series: (6), 1982

Growth, development and survival rate of the Kuben Lake inconnu larvae as affected by the temperature conditions and time of beginning of feeding. Gosudarstvennyii Nauchno-Issledovatel'skii Institut Ozernogo I Rechnogo Rybnogo Khozyaistva Sbornik Nauchnykh Trudov 147: 76-85, 1979

Tolerance of juvenile lake trout exposed to gas supersaturation. Progressive Fish-Culturist 53(1): 17-20, 1991

Effects of one-year exposures to gas supersaturation on lake trout. Progressive Fish-Culturist 55(3): 169-176, 1993

Age, Growth, Survival, and Maturity of Lake Trout Morphotypes in Lake Mistassini, Quebec. Transactions of the American Fisheries Society 141.6 (Nov 1): 1492-1503, 2012

Growth and survival of stocked lake trout with nuclear cataracts in lake ontario. North American Journal of Fisheries Management 11(3): 429-434, 1991