Download or read book Effect of Selective Breeding on the Saint John River Strain of Atlantic Salmon Salmo Salar written by Chris Dawe and published by . This book was released on 2012 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlantic Salmon Brood Stock Management and Breeding Handbook written by Harold L. Kincaid and published by . This book was released on 1989 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Atlantic Salmon written by Eric Verspoor and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atlantic Salmon is a cultural icon throughout its North Atlantic range; it is the focus of probably the World’s highest profile recreational fishery and is the basis for one of the World’s largest aquaculture industries. Despite this, many wild stocks of salmon are in decline and underpinning this is a dearth of information on the nature and extent of population structuring and adaptive population differentiation, and its implications for species conservation. This important new book will go a long way to rectify this situation by providing a thorough review of the genetics of Atlantic salmon. Sponsored by the European Union and the Atlantic Salmon Trust, this book comprises the work of an international team of scientists, carefully integrated and edited to provide a landmark book of vital interest to all those working with Atlantic salmon.
Download or read book Evolutionary Biology of the Atlantic Salmon written by Tomislav Vladić and published by CRC Press. This book was released on 2015-08-10 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atlantic salmon (Salmo salar, L) is an anadromous species contributing to major fishery catches and comprising a significant part of the aquaculturally produced fish for human consumption. The aim of this book is to incite the interest in the field of knowledge gathered from a broad scope of disciplines that have investigated this fish species. Und
Download or read book Variation in Atlantic Salmon Salmo Salar Reproductive Traits and Their Implications in Breeding Programs written by B. D. Glebe and published by . This book was released on 1979 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variation in Atlantic Salmon Salmo Salar Reproductive Traits and Their Implications in Breeding Programs written by International Council for the Exploration of the Sea. Anadromous and Catadromous Fish Committee and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selective Breeding in Aquaculture an Introduction written by Trygve Gjedrem and published by Springer Science & Business Media. This book was released on 2010-03-17 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: The foundation of quantitative genetics theory was developed during the last century and facilitated many successful breeding programs for cultivated plants and t- restrial livestock. The results have been almost universally impressive, and today nearly all agricultural production utilises genetically improved seed and animals. The aquaculture industry can learn a great deal from these experiences, because the basic theory behind selective breeding is the same for all species. The ?rst published selection experiments in aquaculture started in 1920 s to improve disease resistance in ?sh, but it was not before the 1970 s that the ?rst family based breeding program was initiated for Atlantic salmon in Norway by AKVAFORSK. Unfortunately, the subsequent implementation of selective breeding on a wider scale in aquaculture has been slow, and despite the dramatic gains that have been demonstrated in a number of species, less than 10% of world aquaculture production is currently based on improved stocks. For the long-term sustainability of aquaculture production, there is an urgent need to develop and implement e- cient breeding programs for all species under commercial production. The ability for aquaculture to successfully meet the demands of an ever increasing human p- ulation, will rely on genetically improved stocks that utilise feed, water and land resources in an ef?cient way. Technological advances like genome sequences of aquaculture species, and advanced molecular methods means that there are new and exciting prospects for building on these well-established methods into the future.
Download or read book Genetic Diversity in Atlantic Salmon and Salmon Management in Relation to Genetic Factors written by Dag Møller and published by New York : International Atlantic Salmon Foundation. This book was released on 1970 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of Selection Indexes in Atlantic Salmon Salmo Salar written by and published by . This book was released on 1992 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Linear selection indexes were developed for the improvement of growth and development traits in Atlantic salmon and resulted in the progeny of the select being compared to those of the control parents. Genetic and phenotypic variances and covariances were estimated from full-sib-family data. The lack of identification of individuals necessitated certain assumptions such as zero environmental correlations between freshwater and seawater phases of growth and development. The economic weights were approximated. The population studied in experiment one was made up of progeny from early (before August 1) and late (after September 1) run parents from the Saint John River and that for experiment two had approximately 68% grilse (sexual maturation after one sea winter), in contrast to 5.8% in the stock in experiment one.
Download or read book Selection Hybridization and Genetic Engineering in Aquaculture written by Klaus Tiews and published by . This book was released on 1987 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Within and Among population Genetic Variation in Outer Bay of Fundy Atlantic Salmon salmon Salar L with Special Emphasis on the Saint John River System in the Context of Recent Human Impacts written by Patrick O'Reilly and published by . This book was released on 2014 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Atlantic Salmon Space Use of Potential Breeders Stabilises Population Dynamics and Shapes Sexual Selection written by Colin Bouchard and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Habitat fragmentation and reduction in the availability of suitable habitats are significant threats to ecosystems in particularly for freshwater ones. For instance, accessibility, availability, and quality of breeding sites of Atlantic salmon, \textit{Salmo salar}, can be restricting in some rivers due to human activities and dams. Such threats may affect distribution of potential breeders because after their up-river migration, salmon females distribute within available breeding sites. Spatial distribution of females determines the spatial distribution of breeder males. Dominant males try to monopolise several females, whereas subordinate males adopt a sneaky behaviour. Access to females by males depends on the spatial distribution of females and on males' displacements within a river. The spatial distribution of females generates the spatial distribution of juveniles, aggregating them at some breeding sites. The latter aggregation of juveniles may raise the density-dependent mortality with potential consequences on population dynamics. The thesis aims to assess how space use of potential breeders, namely mature individuals able to spawn or fertilise eggs, influence population dynamics and sexual selection.I combined different approaches and different temporal and spatial scales to potential effects of space use of potential breeders. Time series of stock (deposited eggs) and of recruitment (juveniles) for the salmon population of the Nivelle River were combined with measures of spatial aggregation of nests. The effects of displacements and spatial distribution of potential breeders on their participation in reproduction were tested through inferring the sexual network of the population.I found that spatial aggregation of nests improved the recruitment variability but did not affect the average recruitment. The spatial aggregation of nests resulting from female aggregation was also linked to the number of effective breeders through a U-shaped curve. Such relationships suggested mate monopolization dependent on the spatial aggregation of females. The negative effect of the spatial isolation of females on their number of mates also suggest such mate monopolization. Then, the inferred sexual network enabled me to highlight a local social structure within the population. The latter structure and social competitors impacted the reproductive success of anadromous males. The participation of mature parr was one of the factors diminishing the sexual competition faced by anadromous males. Finally, mature parr were more mobile and moved more upstream than immature parr. Spatial behaviours of mature parr were linked to their participation in reproduction, individuals exhibiting wider home ranges had a higher probability to encounter females.Altogether my results show that space use of potential breeders affect both population dynamics and sexual selection. Then, spatial aggregation of females and of their nests can be beneficial for population dynamics as shown by combining different temporal and spatial scales. Females seemed to aggregate within the best breeding sites with a better environmental stability. The spatial distribution of females affected the ability of males to monopolise several females and participation of sneaky males. The availability of suitable good breeding habitats seemed restricting in the Nivelle, potentially due to the presence of impassable upstream dams. The lack of suitable breeding sites seemed impacting the mating system of the population and the sexual selection operating in. Some management actions to improve the quality of breeding sites and their availability could be planned.
Download or read book Resistance to Pathogens in North American Atlantic Salmon written by Melissa Holborn and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Resistance to pathogens is an economically important trait to the Atlantic salmon aquaculture industry. Many diseases that are common at sea cages, where product is reared until harvest, can cause high levels of mortality or cause product downgrading due to reduced growth or appearance. This profit loss has prompted many breeding programs in the industry to investigate methods to breed for pathogen resistance, taking advantage of the naturally existing genetic variation within their broodstock candidates. In this PhD thesis, I exposed Atlantic salmon from the Saint John River strain to three pathogens: Renibacterium salmoninarum causing bacterial kidney disease (BKD), the salmon louse, and infectious salmon anemia (ISA) virus. Each of these disease challenges allowed for the recording of disease phenotypes representing resistance such as survival, time to death, or lice load, to be recorded on siblings of the broodstock candidates from Kelly Cove Salmon Ltd.'s breeding nucleus. High density SNP genotyping was performed on representatives from all families challenged, where the phenotypic extremes from each family were selected. Using the combination of genotypes and phenotypes, I performed genome wide association analyses to determine the genetic architecture of the disease resistance traits and identify regions of the genome associated with disease resistance. Resistance to BKD and salmon lice showed a polygenic trait inheritance while ISA resistance appeared to have oligogenic inheritance, and the regions of the genomes associated with resistance mostly differed for these traits. The exception was Ssa14 where two SNPs were within 1 Mb of each other, one associated with ISA resistance and the other associated with salmon lice resistance. For each disease resistance trait, I detected chromosome wide and/or genome wide significant SNPs that each explained between 4-9% of the phenotypic variation in the trait. These SNPs can be implemented as a subset of SNPs into a genomic selection protocol to estimate genomic estimated breeding values for related individuals. The continuation of disease challenges will allow for greater datasets representing more of the genetic variation within the population and increasing the sample size will allow for greater power of detection of SNPs truly associated with the resistance traits.
Download or read book Experiments with Selective Breeding of Atlantic Salmon written by G. Naevdal and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2014 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlantic Salmon Salmo Salar Migrations in a Large Hydropower Reservoir and the Regulated Saint John River written by Amanda Babin and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: My research focused on evaluating the impacts of the large Mactaquac Generating Station (MGS) reservoir on the migrations of the endangered Outer Bay of Fundy Atlantic salmon (Salmo salar). Salmon respond to flowing waters to determine the direction, timing, and speed of their migrations. A large reach of the Saint John River (SJR) was impounded by the MGS in 1968, transforming the habitat from a freeflowing river to a lacustrine environment with altered and slower flow. I examined all migratory lifestages of Atlantic salmon in the SJR using acoustic telemetry, including pre-smolts, smolts, adults, and post-spawned adults (kelts), as they navigated these environments. Migration rates were compared between the lentic MGS reservoir and the more lotic reaches upriver and downriver of the MGS to assess whether migration is delayed in the reservoir. Nearly all of the tagged salmon experienced migratory delay within the reservoir (medians: smolts 1.3-6.4 d, kelts 3.5-10.5 d, adults 1.5-5.7 d) due to suppressed migration rates (medians: smolts 5.0-13.3 km d[-1 superscript] vs. 15.4-29.3 km d[-1 superscript], kelts 4.4-8.9 km d[-1 superscript] vs. 14.9-36.8 km d[-1 superscript], adults 8.5-20.1 km d[-1 superscript] vs. 19.3-46.9 km d[-1 superscript]). Migration success through the reservoir was higher for downstream migrants (smolts > 81 % and kelts > 82 %) than upstream migrants (adults 47 %). Recommendations informed by these findings with the aim of aiding recovery of this endangered population are given to hydropower and fisheries managers, including: i) changing the spill regime to allow a greater proportion of downstream migrants the option of spillway passage since all but a few smolts and even the earlier kelt migrants were sometimes forced to pass via turbines; ii) constructing a downstream surface-bypass facility which is more economically feasible than increasing spill and is supported by the observed variable passage timing; iii) allowing the free-swim of downstream migrants through bypasses in comparison to a trap-and-haul strategy that was not found to increase survival of smolts; and iv) maintaining trap-and-haul operations for adults migrating upstream of the MGS due to the high proportion of fallbacks and increased energy expenditure from superfluous movements in the reversed direction to the intended migration observed in the reservoir.
Download or read book Selection and Breeding Programs in Aquaculture written by Trygve Gjedrem and published by Springer Science & Business Media. This book was released on 2005-04-13 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although aquaculture as a biological production system has a long history, systematic and efficient breeding programs to improve economically important traits in the farmed species have rarely been utilized until recently, except for salmonid species. This means that the majority of aquaculture production (more than 90 %) is based on genetically unimproved stocks. In farm animals the situation is vastly different: practically no terrestrial farm production is based on genetically unimproved and undomesticated populations. This difference between aquaculture and livestock production is in spite of the fact that the basic elements of breeding theory are the same for fish and shellfish as for farm animals. One possible reason for the difference is the complexity of reproductive biology in aquatic species, and special consideration needs to be taken in the design of breeding plans for these species. Since 1971 AKVAFORSK, has continuously carried out large scale breeding research projects with salmonid species, and during the latest 15 years also with a number of fresh water and marine species. Results from this work and the results from other institutions around the world have brought forward considerable knowledge, which make the development of efficient breeding programs feasible. The genetic improvement obtained in selection programs for fish and shellfish is remarkable and much higher than what has been achieved in terrestrial farm animals.
