Download or read book Genetic Management of Atlantic Cod Gadus Morhua L Hatchery Populations written by Marine Claire Ghislaine Herlin and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Intensive aquaculture of Atlantic cod is fast developing in both Northern Europe and Canada. The last six years have seen major improvements in the larval rearing protocols and husbandry techniques for this species. Although breeding programmes are currently being developed by both governmental and private institutions in the main cod producing countries (i.e. Norway, Iceland and Canada), most hatcheries still rely on the mass spawning of their own broodstock. Mass spawning tanks are complex systems where fish are left to spawn naturally and fertilised eggs are collected with the overflowing water, with little or no control over the matings of the animals. Few published studies in other commercial marine species (i.e. turbot and sole) have attempted to analyse the output from such systems using microsatellite markers and several parentage analysis software programs. A review of these publications exposed a lack of consistency in the methods used to analyse such complex datasets. This problem was addressed by carrying out a detailed comparison of two analytical principals (i.e. assignment by strict exclusion and assignment by probabilities) and four parentage software programmes (i.e. FAP, VITASSIGN, CERVUS and PAPA), using the DNA profiles, at 5 loci, from 300 cod fry issued from the mass spawning of a large hatchery cod broodstock tank (consisting of 99 fish). This study revealed large discrepancies in the allocation outcomes between exclusion-based and probability-based assignments caused by the important rate of typing errors present in the dataset. Out of the four softwares tested, FAP (Taggart, 2007) was the most appropriate to use for handling such a dataset. It combined the most conservative method of assignment with the most informative output for the results displayed. In an attempt to study the breeding dynamics in a cod commercial hatchery, parental contributions to five groups of 300 fry (from five single days of spawning and from two commercial mass spawning cod tanks) were analysed, based on the genotyping data from eight loci. The parentage results from the exclusion-based analyses revealed that, on a single day, at least 25 to 30% of the total breeding population contributed to fertilised eggs that resulted in viable offspring at 50 and 83 days post-hatch. Family representations were highly skewed - with the marked dominance of a few males - and effective breeding populations were consistently low (approx. 5% of the total breeding population). Parental contribution to a group of 960 codlings - produced following intensive commercial practices (i.e. including successive size gradings and mixing of batches) and belonging to a single graded group - was also analysed, based on the genotyping data from eleven loci. The effective breeding population size of the juvenile batch (c. 14% of the total broodstock population) was two to three times greater than the effective size observed on a single day of mass spawning. The per-generation rate of inbreeding was however relatively high, for this batch alone, at 2.5%. Based on these results, suggestions were made to manage hatchery cod broodstock populations and implement genetic selection. Early maturation of farmed cod in sea cages (at two or three years old) is a major concern for ongrowers. Understanding the mechanism(s) behind sex determination in cod would probably help the development of a method to control sexual maturation. In an attempt to elucidate sex determination in cod, a protocol to induce gynogenesis was developed. Gynogenetic fish were successfully produced by irradiating cod milt with UV and applying a cold shock (at -6oC) to newly fertilised eggs. However, due to poor survival during larval rearing, only one gynogenetic fish survived long enough to be sexed; not enough to conclude anything on the sex determination mechanism(s) in cod.
Download or read book Inter population Differences in Growth and Energy Allocation of Northwest Atlantic Cod Gadus Morhua L Revealed by Common Environment Experiments written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Structure of Atlantic Cod Gadus Morhua in the Newfoundland and Labrador Area Determined from Genetic Variation written by Terry D. Beacham and published by . This book was released on 2000 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Genetics Fishery Management written by N. Ryman and published by University of Washington Press. This book was released on 1987 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the first publication of "Population Genetics and Fishery Management" in 1987, significant technological, analytical, and conceptual changes have occurred. By explaining basic population genetics in a fisheries context, the text continues to serve as an excellent starting point for approaching complex recent developments.
Download or read book Genetic Population Structure of Atlantic Cod Gadus Morhua in the Baltic Sea written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Variation in the Atlantic Cod Gadus Morhua L written by Tracy Noble and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Genetics in Fisheries written by Gary R. Carvalho and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: The basic principle of all molecular genetic methods is to employ inherited, discrete and stable markers to identify genotypes that characterize individuals, populations or species. Such genetic data can provide information ori the levels and distribution of genetic variability in relation to mating patterns, life history, population size, migration and environment. Although molecular tools have long been employed to address various questions in fisheries biology and management, their contributions to the field are sometimes unclear, and often controversial. Much of the initial impetus for the deployment of molecular markers arose from the desire to assess fish stock structure based on various interpretations of the stock concept. Although such studies have met with varying success, they continue to provide an impetus for the development of increasingly sensitive population discriminators, yielding information that can be valuable for both sustainable exploitation and the conservation of fish populations. In the last major synthesis of the subject, Ryman and Utter (1987) summarized progress and applications, though this was prior to the wide-scale adoption of DNA methodology. New sources of genetic markers and protocols are now available, in particular those that exploit the widely distributed and highly variable repeat sequences of DNA, and the amplification technique of the polymerase chain reaction.
Download or read book Biological Report written by and published by . This book was released on 1988 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetics for Fish Hatchery Managers written by Douglas Tave and published by Springer. This book was released on 1993-02-28 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: This straightforward, easily understandable primer details the principles and practices of genetics as they relate to fish farming. After reviewing basic genetic principles and the genetics of sex determination, this book focuses on the genetics of qualitative traits and profiles selection programs that produce true breeding populations. It also considers quantitative issues, broodstock management, genetic engineering, chromosomal manipulation and electrophoresis.
Download or read book Genomics in Aquaculture written by Simon A MacKenzie and published by Academic Press. This book was released on 2016-07-29 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genomics in Aquaculture is a concise, must-have reference that describes current advances within the field of genomics and their applications to aquaculture. Written in an accessible manner for anyone—non-specialists to experts alike—this book provides in-depth coverage of genomics spanning from genome sequencing, to transcriptomics and proteomics. It provides, for ease of learning, examples from key species most relevant to current intensive aquaculture practice. Its coverage of minority species that have a specific biological interest (e.g., Pleuronectiformes) makes this book useful for countries that are developing such species. It is a robust, practical resource that covers foundational, functional, and applied aspects of genomics in aquaculture, presenting the most current information in a field of research that is rapidly growing. - Provides the latest scientific methods and technologies to maximize efficiencies for healthy fish production, with summary tables for quick reference - Offers an extended glossary of technical and methodological terms to help readers better understand key biological concepts - Describes state-of-the-art technologies, such as transcriptomics and epigenomics, currently under development for future perspective of the field - Covers minority species that have a specific biological interest (e.g., Pleuronectiformes), making the book useful to countries developing such species
Download or read book Stock Enhancement and Sea Ranching written by Kenneth M. Leber and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collapse of many of the World’s fisheries continues to be of major concern and the enhancement of fish stocks through techniques such as ranching is of huge importance and interest across the globe. This important book, which contains fully peer reviewed and carefully edited papers from the 2nd International Symposium in Stock Enhancement and Sea Ranching is broadly divided into sections covering the following areas: The present situation of stock enhancement Seed quality and techniques for effective stocking Health management of hatchery stocks Methods for evaluating stocking effectiveness Population management in stock enhancement and sea ranching Management of stocked populations Ecological interactions with wild stocks Genetic management of hatchery and wild stocks Socio-economics of stock enhancement Case studies Stock Enhancement and Sea Ranching has been written and edited by some of the world’s foremost authorities in fisheries science and related areas and is essential reading for all fisheries scientists throughout the World. Fish biologists, marine and aquatic scientists, environmental biologists, ecologists, conservationists, aquaculture personnel and oceanographers will all find much of use and interest within this book. All libraries within universities and research establishments where these subjects are studied and taught should have copies of this book on their shelves.
Download or read book Comparing Genetic Variation Among Atlantic Cod Gadus Morhua Off Newfoundland and Labrador Following the Stock Collapse written by Ty Gormley and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following the collapse of the Northern cod stock, there has been much debate regarding the population structure of Canada’s Northern Atlantic cod (Gadus morhua). The objectives of the study are: 1) to determine whether the stock exhibits structure or panmixia and 2) to compare historic cod chromosomal inversion frequency (LG01) to among historic and modern cod. A whole genome scan on 119 historic cod captured between 2001 and 2003 was conducted from four locations spanning the range of the stock and two locations outside the stock. Population structure analysis using 3,907 SNPs suggests that the stock is a single panmictic population. However, additional analyses on only LG01 (15) revealed that historic cod had a higher inversion frequency than modern cod. Taken together, these results provide support for the metapopulation hypothesis and provide novel information on putative adaptive inversion allele changes over a short timeframe.
Download or read book Interpopulation Differences in Growth Food Conversion Efficiency and Swimming Performance of 0 Juvenile Atlantic Cod Gadus Morhua written by Manjusri Pandula Atapattu Wijekoon and published by . This book was released on 2004 with total page 208 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 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetics and Evolution of Aquatic Organisms written by A. Beaumont and published by Springer Science & Business Media. This book was released on 1994-03-31 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together, for the first time, a wide range of up-to-the-minute and traditional techniques and approaches to the study of genetics of organisms living in freshwater or marine habitats. Carefully edited chapters are headed by broad review articles against which are set a number of more specific experience papers which demonstrate the breadth and range of approaches currently being undertaken.
Download or read book Genetic Guidelines for Fisheries Management written by Anne R. Kapuscinski and published by . This book was released on 1987 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Workshop on Status and Trends in Aquatic Genetic Resources written by Devin M. Bartley and published by Food & Agriculture Org.. This book was released on 2007 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Of the workshop -- Background of the workshop -- Report of the workshop -- Conclusions and recommendations of the workshop -- Contributed papers. Developing policies for the management of fishery genetic resources / D.M. Bartley and A. Toledo -- Status and trends in genetic resources of capture fisheries / W.S. Grant -- Issues, status and trends in deep-sea fishery genetic resources / P.J. Smith -- Genetic resources for aquaculture : status and trends / R.S.V. Pullin -- Fish genomics and analytical genetic technologies, with examples of their potential applications in management of fish genetic resources / Z. Liu.
