Digestibility, growth and nutrient retention in rainbow trout (Oncorhynchus mykiss) fed diets extruded at two different temperatures

2005 ◽  
Vol 11 (4) ◽  
pp. 251-256 ◽  
Author(s):  
M. SORENSEN ◽  
T. STOREBAKKEN ◽  
K.D. SHEARER
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Nutrient Retention ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Different Temperatures

RNA/DNA ratios in white muscle as estimates of growth in rainbow trout held at different temperatures

1990 ◽  
Vol 68 (7) ◽  
pp. 1494-1498 ◽  
Author(s):  
Moira M. Ferguson ◽  
Roy G. Danzmann
Keyword(s):  
Growth Rate ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
White Muscle ◽  
Specific Growth ◽  
Fish Size ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Different Temperatures ◽  
Specific Growth Rates ◽  
Rna And Dna

The concentrations of RNA, DNA, and protein in white muscle from 240 uniquely tagged rainbow trout (Oncorhynchus mykiss) held at three temperatures (5, 8 (control), and 11 °C) were measured. Both RNA and RNA/DNA ratios were better predictors of recent length- and weight-specific growth rates than they were of absolute fish size. Furthermore, RNA concentrations were better predictors of growth than RNA/DNA ratios. The strength of the regression between either RNA/DNA ratio or RNA and growth rate did not differ consistently among temperatures. Fish reared at warmer temperatures had lower concentrations of RNA for both a given growth rate and a given DNA concentration compared with cold-reared trout. Warm-reared fish also had lower concentrations of DNA and higher protein/DNA ratios than cold-reared trout when fish size was standardized. The concomitant decrease in both RNA and DNA concentrations resulted in marginally lower RNA/DNA ratios in warm-reared fish.

scholarly journals Red beet and betaine as ingredients in diets of rainbow trout (Oncorhynchus mykiss): effects on growth performance, nutrient retention and flesh quality

2017 ◽  
Vol 71 (6) ◽  
pp. 486-505 ◽  
Author(s):  
Julia Pinedo-Gil ◽  
Ana Tomás-Vidal ◽  
Miguel Jover-Cerdá ◽  
Cristina Tomás-Almenar ◽  
Miguel Ángel Sanz-Calvo ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Nutrient Retention ◽  
Flesh Quality ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Red Beet

Isoeugenol concentrations in rainbow trout (Oncorhynchus mykiss) skin-on fillet tissue after exposure to AQUI-S™ at different temperatures, durations, and concentrations

Aquaculture ◽  
2006 ◽  
Vol 254 (1-4) ◽  
pp. 347-354 ◽  
Author(s):  
Jeffery R. Meinertz ◽  
Shari L. Greseth ◽  
Theresa M. Schreier ◽  
Jeffry A. Bernardy ◽  
William H. Gingerich
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Different Temperatures

Decomposition of Rainbow Trout (Oncorhynchus mykiss) Carcasses in a Forest Stream Ecosystem Inhabited only by Nonanadromous Fish Populations

1991 ◽  
Vol 48 (2) ◽  
pp. 191-195 ◽  
Author(s):  
G. Wayne Minshall ◽  
Evelyn Hitchcock ◽  
James R. Barnes
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Water Temperature ◽  
Relative Weight ◽  
Algal Growth ◽  
Rocky Mountain ◽  
Nutrient Retention ◽  
Stream Ecosystem ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Forest Stream

The overall dynamics of rainbow trout (Oncorhynchus mykiss) carcass decomposition in a woodland stream ecosystem was examined in two experiments conducted in the West Fork of Mink Creek, Idaho: one during winter–spring (mean water temperature 4.2 °C) and one during summer (mean water temperature 8.6 °C). Relative weight loss (%AFDW) from fish during both periods was essentially constant. In spring, mean daily loss per day was 1.5%. Although this rate is comparable with the decay of high-quality ("fast") leaves, it took much longer than expected (> 120 d) for the even higher quality fish protein. In summer, decay was more rapid (4.9%/d) and was completed in less than half the time (~50 d). Most decay appeared to progress from inside the carcasses outward to the skin. The skin remained intact throughout most of both experiments. Nutrients leached from the fish appeared to be utilized rapidly by microbes associated with the carcass, since no stimulation of algal growth occurred immediately downstream of the carcasses. This suggests extremely tight nutrient spirals and high nutrient retention in Mink Creek and other comparable Rocky Mountain headwater streams.

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