Growth of rainbow trout (Oncorhynchus mykiss) in warm-temperate lakes: implications for environmental change

2013 ◽  
Vol 70 (5) ◽  
pp. 815-823 ◽  
Author(s):  
Jennifer M. Blair ◽  
Ilia Ostrovsky ◽  
Brendan J. Hicks ◽  
Robert J. Pitkethley ◽  
Paul Scholes
Keyword(s):  
Rainbow Trout ◽  
Dissolved Oxygen ◽  
Oncorhynchus Mykiss ◽  
Growth Rates ◽  
Anthropogenic Impacts ◽  
Temperate Lakes ◽  
Lake Productivity ◽  
Eutrophic Lakes ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Warm Temperate

To predict potential effects of climate and anthropogenic impacts on fish growth, we compared growth rates of rainbow trout (Oncorhynchus mykiss) in nine closely located warm-temperate lakes of contrasting morphometry, stratification and mixing regime, and trophic state. Analyses of long-term mark–recapture data showed that in deep oligotrophic and mesotrophic lakes, trout growth rates increased with increasing indices of lake productivity. In contrast, in shallow eutrophic lakes, where fish habitat volume is constrained by temperature and dissolved oxygen, trout growth rates declined with increasing productivity. Growth rates were higher in lakes with greater volumes of favourable habitat (i.e., dissolved oxygen > 6.0 mg·L−1 and temperature < 21 °C) and lower in lakes with increased turbidity, chlorophyll a, and nitrogen concentrations. Our findings suggest that increases in lake productivity and temperatures as a result of global climatic change are likely to be more detrimental to salmonid habitat quality in shallower, productive lakes, while salmonids will better endure such changes in deeper, oligotrophic lakes. Fishery managers can use this information to aid future stocking decisions for salmonid fisheries in warm-temperate climates.

scholarly journals Growth of rainbow trout (oncorhynchus mykiss) in the conditions of Tashkent province, Uzbekistan

2021 ◽  
Vol 258 ◽  
pp. 04040
Author(s):  
SH Sulaymonov ◽  
G Abdullaev ◽  
S Saidumarov
Keyword(s):  
Water Quality ◽  
Rainbow Trout ◽  
Dissolved Oxygen ◽  
Oncorhynchus Mykiss ◽  
Water Temperature ◽  
Fish Farming ◽  
Local Conditions ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Fish Productivity ◽  
Feed Coefficient

Rainbow trout is a new fish farming object for Uzbekistan, the adaptability of which (first of all, growth) to local conditions should be carefully studied. We analyzed the growth of rainbow trout in the conditions of flowing pools and cages in the foothill zone of Tashkent province of Uzbekistan. From March to October, the water temperature in the Khojikent reservoir varied from 4.9 to 13.1 °C, the amount of dissolved oxygen was 8.4 to 11.5 mg/l, and the pH was 7.40 to 7.67. In the flowing basin, the temperature was 15-18 °C, pH 7.2-7.5, the amount of dissolved oxygen 6.1-11.2 mg/l. The conditions of the foothill zones of Uzbekistan in terms of water quality are favorable for the development of trout breeding. During the season, fish in cages increased from 250 g to 623 g, in pools from 25 g to 390 g on average. The waste was 1.7%. The actual fish productivity of the basin is 39 kg/m3, the cage is 30 kg/m3 and the feed coefficient in the basin is 1.2, in the cages - 1.09.

scholarly journals The effects of swimming exercise and dissolved oxygen on growth performance, fin condition and survival of rainbow trout Oncorhynchus mykiss

2020 ◽  
Vol 51 (6) ◽  
pp. 2582-2589
Author(s):  
Thomas Waldrop ◽  
Steven Summerfelt ◽  
Patricia Mazik ◽  
P. Brett Kenney ◽  
Christopher Good
Keyword(s):  
Rainbow Trout ◽  
Dissolved Oxygen ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Swimming Exercise ◽  
Rainbow Trout Oncorhynchus Mykiss

Growth and age validation of Rainbow Trout, Oncorhynchus mykiss (Walbaum)' in Lake Eucumbene, NSW

1992 ◽  
Vol 43 (5) ◽  
pp. 1033 ◽  
Author(s):  
RA Faragher
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Rates ◽  
Age Estimation ◽  
New South ◽  
Age Validation ◽  
Scale Reading ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
South Wales ◽  
Second Year

Growth rates of finclipped rainbow trout (Oncorhynchus mykiss) released into Lake Eucumbene, New South Wales, at an age of 0+ years were examined for each year between 1986 and 1988. Traps and nets yielded significant numbers of marked fish for validation of age estimation and length backcalculation from scale reading. Poor recognition of the marks by anglers was confirmed, indicating that survival of the fish was higher than was implied by angling returns. The diffuse nature of the second annulus in scales provided initial difficulty in ageing, particularly because of a similarly diffuse false check formed during the second year. Care was required in separating the annuli after asymptotic growth was reached (3 years), Growth rates in Lake Eucumbene were comparable with those found in studies in Tasmania and Victoria. Back-calculated lengths were in agreement with those from fish of known ages. The presence of finclipped fish aged 2 + and 3 + years in a spawning population confirmed that stocked fish contributed to the spawning stocks. The study reconfirms the importance of validation of ageing techniques in fisheries investigations.

Metabolic Effects of Bovine Growth Hormone and Genetically Engineered Rainbow Trout Growth Hormone in Rainbow Trout (Oncorhynchus mykiss) Reared at a High Temperature

1990 ◽  
Vol 47 (7) ◽  
pp. 1292-1301 ◽  
Author(s):  
Roy G. Danzmann ◽  
Glen J. Van Der Kraak ◽  
Thomas T. Chen ◽  
Dennis A. Powers
Keyword(s):  
Growth Hormone ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Rates ◽  
Specific Growth ◽  
Genetically Engineered ◽  
Bovine Growth Hormone ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Treated Fish ◽  
Specific Growth Rates

The growth promoting ability of bovine growth hormone purified from natural sources (bGH) and genetically engineered rainbow trout growth hormone (rtGH) were compared in rainbow trout (Oncorhynchus mykiss) reared at 17.0 °C. Fish were fed high (on-demand feeding) and low (2.8–4.6% of body weight/d) rations. On both rations, length specific growth rates were significantly higher in bGH treated fish than in all other treatments. No significant differences in weight specific growth rates were detected between treatments. Testosterone levels in fish fed the high ration and treated with 1.0 μg/g rtGH or bGH were significantly elevated compared with controls as were 17-β-estradiol levels in females. bGH significantly reduced condition factors of low ration fish, and bGH and rtGH significantly depressed hepatosomatic indicies of high ration fish compared with controls. In a second experiment, weight and length specific growth rates were higher in rtGH and bGH injected fish than in saline controls but these differences were not significant. DNA standardized RNA levels were higher in rtGH and bGH treated fish than in saline control fish and these differences were significant in bGH treated fish. Results indicate that at high rearing temperatures GH administration does not have a major influence on growth but does stimulate steroidogenic and metabolic activity.

pH, Hardness, and Humic Acid Influence Aluminum Toxicity to Rainbow Trout (Oncorhynchus mykiss) in Weakly Alkaline Waters

1994 ◽  
Vol 51 (6) ◽  
pp. 1345-1355 ◽  
Author(s):  
Deke T. Gundersen ◽  
Sjahrul Bustaman ◽  
Wayne K. Seim ◽  
Lawrence R. Curtis
Keyword(s):  
Rainbow Trout ◽  
Humic Acid ◽  
Oncorhynchus Mykiss ◽  
Growth Rates ◽  
Aluminum Toxicity ◽  
Alkaline Ph ◽  
Weakly Alkaline ◽  
Neutral Ph ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Specific Growth Rates

Juvenile rainbow trout (Oncorhynchus mykiss) were exposed for either 96 h (acute) or 16 d (subacute) to various combinations of aluminum and hardness concentrations or aluminum and humic acid concentrations between pH 7.14 and 8.58. Aluminum-induced mortality was higher at weakly alkaline pH (7.95–8.58) (attributed to up to 10-fold higher filterable aluminum concentrations) than near-neutral pH (7.14–7.64). Growth rates were higher in 16-d hardness tests at weakly alkaline pH (0.188–1.600% of initial weight∙d−1) than for fish exposed to similar aluminum concentrations at near-neutral pH (−0.535–0.756%∙d−1). This suggested that polymeric and colloidal forms of aluminum were more potent than soluble forms in restricting growth. Hardness and humic acid appeared most protective to trout against subacute aluminum toxicity. Cumulative mortality of trout exposed to 1.50 mg aluminum∙L−1 at 103 or 20 mg∙L−1 hardness as CaCO3 was 10 and 45%, respectively. Hardness did not significantly protect against aluminum-induced growth inhibition. Trout exposed for 16 d to aluminum (0.53–2.56 mg∙L−1) and humic acid 4.31–5.23 mg∙L−1) had higher specific growth rates and decreased mortality than those exposed to aluminum and ho humic acid at any pH.

Reduced swimming performance and increased growth in domesticated rainbow trout, Oncorhynchus mykiss

2009 ◽  
Vol 66 (7) ◽  
pp. 1025-1032 ◽  
Author(s):  
Drew Reinbold ◽  
Gary H. Thorgaard ◽  
Patrick A. Carter
Keyword(s):  
Rainbow Trout ◽  
Body Size ◽  
Oncorhynchus Mykiss ◽  
Body Mass ◽  
Growth Rates ◽  
Swimming Performance ◽  
Large Body ◽  
High Growth ◽  
Hybrid Progeny ◽  
Rainbow Trout Oncorhynchus Mykiss

Domesticated populations of rainbow trout ( Oncorhynchus mykiss ) probably have been selected for high growth rates and large body size, which may have resulted in reduced sprint swimming performance. We hypothesized that more domesticated populations of rainbow trout would have higher growth rates and larger body size, but slower swim speed, relative to semiwild populations. We tested this hypothesis by measuring body mass, body length, and sprint swim speed multiple times over 92 days in progeny from crosses between males from three clonal lines and an outbred female. We found significantly higher body masses and significantly slower swim speeds in the highly domesticated Arlee and Hot Creek progeny groups compared with the semiwild Swanson hybrid progeny group, supporting our hypothesis. Growth rates also differed significantly among groups, but at the ages measured, the Swanson hybrid progeny had an intermediate growth rate. However, given the differences in body mass, either growth rates were higher in the more domesticated progeny groups at young unmeasured ages and (or) they hatched at a significantly larger body mass than the semiwild Swanson hybrid.

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