Download or read book Growth and Survival of Two Strains of Rainbow Trout Tagwerker and Nisqually in a Winterkill Lake and Four Experimental Ponds written by Canada. Department of Fisheries and Oceans. Central and Arctic Region and published by . This book was released on 1995 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Intra strain Inheritance of Growth and Survival in Rainbow Trout Salmo Gairdneri Richardson Reared in Two Hatchery and Two Prairie Winterkill Lake Environments written by John Kenneth Bailey and published by . This book was released on 1978 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intra-strain inheritance of growth and survival in rainbow trout (Salmo gairdneri), reared for 8-10 months in 2 hatchery and 2 prairie winterkill lake environments, was studied by means of a hierarchal mating design. Statistical determinations were made on both individual values and full sib family means. The implications for the genetic improvement of rainbow trout for extensive aquacultural purposes are discussed. Individual heritability values for fork length and weight were respectively, 0.09 and 0.06 in the non-competitive hatchery environment, 0.27 and 0.23 in the competitive hatchery environment, 0.09 and 0.00 in lake 971 and 0.27 and 0.04 in lake 506. Fork length and weight heritability estimates determined from full sib family means were much larger in all environments and were respectively, 0.58 and 0.42 in the non-competitive hatchery environment, 0.99 and 0.94 in the competitive hatchery environment, 1.08 and 0.50 in lake 971, and 0.78 and 0.74 in lake 506. In lakes 971 and 506 heritability estimates for individual survival were 0.18 and 0.02 respectively and for full sib family means they were 1.07 and 0.53 respectively. Inter-family competition caused a magnification of genetic differences between hatchery environments and was unimportant in the lake environments. Family selection is expected to produce a more rapid response in growth and survival than individual or mass selection. Genotype-environment interactions were important in all environments. Artificial selection would be more effective in the intended environment than in the hatchery. Additive genetic, environmental, and phenotypic correlations between fork length and weight were large and positive in all environments. Simultaneous selection for these traits would be effective.

Download or read book The Comparative Growth and Survival of a Naturalized and Aquaculture Strain of Rainbow Trout Oncorhynchus Mykiss in Laboratory and Whole ecosystem Experiments written by Matthew Thomas Martens and published by . This book was released on 2013 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Relative Growth and Survival of Three Strains of Rainbow Trout and Three Strains of Brown Trout Stocked Into Small Michigan Inland Lakes written by Andrew J. Nuhfer and published by . This book was released on 1996 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rainbow Trout Growth in Circular Tanks written by James L. Brauhn and published by . This book was released on 1976 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prediction equations correlating density of fingerling rainbow trout with growth, yield, and food use efficiency indicated that ammonia nitrogen resulting from high fish densities wes responsible for reductions in all three factors. These predictable density-dependent responses present fish-culturists with alternatives of density selection for evaluation and attainment of specific goals. In examples, fish-culturists, by manipulating density, could achieve rapid growth, produce the maximum weight possible, balance yield with cost, optimize fish quality, or combine two or more of these goals.

Download or read book A Comparison of Growth Survival and Hook and Line Catchability of Eagle Lake and Wigwam Strain Rainbow Trout in Farm Ponds written by Bill Wichers and published by . This book was released on 1985 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Comparison of Growth Survival and Catchability of Four Rainbow Trout Varieties in Farm Ponds written by L. C. Rockett and published by . This book was released on 1977* with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Evaluation of Rainbow Trout Strains in the Sport Fishery of Three Wisconsin Lakes and for Trout Ranching in Minnesota Winterkill Lakes written by Neil E. Kmiecik and published by . This book was released on 1980 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance comparison of Rainbow Trout Oncorhynchus mykiss under the specific environmental condition in the Highland of Northern Thailand written by and published by Cuvillier Verlag. This book was released on 2004-09-20 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive performance comparison (e.g. 8 000 fish) of different rainbow trout populations was conducted at Doi lnthanon Fisheries Research Unit over two experimental series in order to identify populations which are suitable to establish rainbow trout farming under the specific production conditions of Northern Thailand. This population comparison included survival, growth and reproductive performance. Eyed eggs of seven populations were transferred from the Experimental Trout Station Relliehausen, University of Goettingen, to Doi [nthanon Fisheries Research Unit. Here a special system for population testing in trout was developed. This consisted of separate hatching and rearing of populations till the end of the first feeding stage under two water temperature regimes (11oc, 14°C), further separate rearing of each population up to markable size under ambient water temperatures and common fattening up to pan-size weight.

Download or read book Growth and Food Habits of Strains of Rainbow Trout Salmo Gairdneri written by D. Bemard and published by . This book was released on 1978 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Growth and Food Habits of Strains of Rainbow Trout Salmo Gairdneri written by D. Bemard and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: