Sexual Plasticity And Gametogenesis In Fishes
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Sexual Plasticity And Gametogenesis In Fishes
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Author : Balasubramanian Senthilkumaran
language : en
Publisher: Nova Science Publishers
Release Date : 2013
Sexual Plasticity And Gametogenesis In Fishes written by Balasubramanian Senthilkumaran and has been published by Nova Science Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Adaptation (Physiology) categories.
Sex determination, differentiation and gamete maturation are well organised molecular events in vertebrates. In vertebrates, sex determination and differentiation are two important events in the development of gonads (testis or ovary). Sex determination is the genetic (sex chromosomes) or environmental process by which the sex (male or female) of an individual is established. During embryonic development, primordial germ cells migrate from the site of origin to the gonadal primordia where they differentiate along with somatic cells and finally form the indifferent/bipotential gonads. Depending on the action of various factors the bipotential gonads give rise to either testis or ovaries. In most vertebrates, excluding fishes and some amphibians, the event of sex determination is controlled genetically and later the progression of gonadal development is controlled by hormones and other factors. Interestingly, these processes in fishes are controlled not only genetically but also through hormones or environmental factors. These characteristics make fish the champions of sex reversal and serve as excellent animal models to precisely understand sexual development. The next interesting aspect is meiotic maturation which is essentially mediated by gonadotropins and progesterone metabolites to trigger final gamete maturation in fishes which is different from mammals. The novel aspects pertaining to gamete maturation has been studied in great detail in fish which depicts precise regulatory events of gamete maturation.
Sexuality In Fishes
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Author : T. J. Pandian
language : en
Publisher: CRC Press
Release Date : 2010-09-15
Sexuality In Fishes written by T. J. Pandian and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-09-15 with Science categories.
The unprecedented level of diversity recorded among the clones of self-fertilizing gynogenetic unisexuals and self-fertilizing simultaneous hermaphrodites challenges current ideas on the predominant role of recombination in promoting evolution of biological diversity. Though limited to a few species, the existence of self-fertilizing and cyclical sex changing hermaphrodites remians a puzzle to many geneticists and endocrinologists. Within a few days after the removal of a harem master or mistress, a successor changes sex and takes over the harem; the causes for the sex changing mechanism pose many challenges to socio-ecologists and behaviour specialists.This book is a synthesis of relevant and recent information on sexuality of fishes and points towards new directions of desired research.
Aquaculture Pharmacology
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Author : Frederick S.B. Kibenge
language : en
Publisher: Academic Press
Release Date : 2020-10-18
Aquaculture Pharmacology written by Frederick S.B. Kibenge and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-10-18 with Technology & Engineering categories.
Aquaculture Pharmacology is a reliable, up-to-date, "all inclusive" reference and guide that provides an understanding of practical drug information for the aquaculture industry. This book covers the sources, chemical properties, and mechanisms of action of drugs, and the biological systems upon which they act. It covers various drug interactions, therapeutic uses of drugs, as well as legal considerations within the industry as a whole. It presents the four main groups of drugs used in fish, crustaceans and molluscs and includes disinfectants, antimicrobial drugs, antiparasitic agents, and anesthetics, and identifies areas where more research is needed to generate more knowledge to support a sustainable aquaculture industry. With the burgeoning international aquaculture expansion and expanding global trade in live aquatic animals and their products this book is useful to bacteriologists, mycologists, aquaculturists, clinical practitioners in aquatic animal health and all those in industry, government or academia who are interested in aquaculture, fisheries and comparative biology. Presents clinical information for the three major aquatic food animals (fish, crustaceans and molluscs) Facilitates research to develop vaccines or other similar pathogen mitigation measures Provides the latest advancements in the field including regulated pharmaceuticals for use in fisheries and aquaculture
Endocrine Sex Differentiation In Fish
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Author : T. J. Pandian
language : en
Publisher: CRC Press
Release Date : 2013-05-07
Endocrine Sex Differentiation In Fish written by T. J. Pandian and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-05-07 with Nature categories.
Of all vertebrates, fish exhibit unparalleled diversity of sexual plasticity and flexibility, ranging from gonochorism to unisexualism, and exceptional patterns of functional hermaphroditism. Fish farming and monosex aquaculture have led to reproductive dysfunction with males producing less milt, and females failing to ovulate and spawn. This book brings together relevant information on the role of the endocrine system on sexual differentiation in fish, and bridges the gap between molecular endocrinologists and fishery scientists.
Sex Control In Aquaculture
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Author : Hanping Wang
language : en
Publisher: John Wiley & Sons
Release Date : 2018-11-08
Sex Control In Aquaculture written by Hanping Wang and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-08 with Technology & Engineering categories.
Awarded Bookauthority's "Best Aquaculture Books of all Time" A comprehensive resource that covers all the aspects of sex control in aquaculture written by internationally-acclaimed scientists Comprehensive in scope, Sex Control in Aquaculture first explains the concepts and rationale for sex control in aquaculture, which serves different purposes. The most important are: to produce monosex stocks to rear only the fastest-growing sex in some species, to prevent precocious or uncontrolled reproduction in other species and to aid in broodstock management. The application of sex ratio manipulation for population control and invasive species management is also included. Next, this book provides detailed and updated information on the underlying genetic, epigenetic, endocrine and environmental mechanisms responsible for the establishment of the sexes, and explains chromosome set manipulation techniques, hybridization and the latest gene knockout approaches. Furthermore, the book offers detailed protocols and key summarizing information on how sex control is practiced worldwide in 35 major aquaculture species or groups, including fish and crustaceans, and puts the focus on its application in the aquaculture industry. With contributions from an international panel of leading scientists, Sex Control in Aquaculture will appeal to a large audience: aquaculture/fisheries professionals and students, scientists or biologists working with basic aspects of fish/shrimp biology, growth and reproductive endocrinology, genetics, molecular biology, evolutionary biology, and R&D managers and administrators. This text explores sex control technologies and monosex production of commercially-farmed fish and crustacean species that are highly in demand for aquaculture, to improve feed utilization efficiency, reduce energy consumption for reproduction and eliminate a series of problems caused by mixed sex rearing. Thus, this book: Contains contributions from an international panel of leading scientists and professionals in the field Provides comprehensive coverage of both established and new technologies to control sex ratios that are becoming more necessary to increase productivity in aquaculture Includes detailed coverage of the most effective sex control techniques used in the world's most important commercially-farmed species Sex Control in Aquaculture is the comprehensive resource for understanding the biological rationale, scientific principles and real-world practices in this exciting and expanding field.
Recent Updates In Molecular Endocrinology And Reproductive Physiology Of Fish
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Author : Jitendra Kumar Sundaray
language : en
Publisher: Springer Nature
Release Date : 2021-01-27
Recent Updates In Molecular Endocrinology And Reproductive Physiology Of Fish written by Jitendra Kumar Sundaray and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-27 with Science categories.
This book is dedicated to present different aspects of reproductive physiology and molecular endocrinology of commercially important as well as potential aquaculture fish species. The existing aquaculture generation is looking for species diversification for efficient utilization of available diverse water resources. The knowledge of reproductive physiology of fish will help in development of breeding strategy for use in commercial aquaculture. Reproductive system is highly coordinated and governed by means of complex network of nervous, endocrine system and environmental factor as well. This book emphasize on different key aspects of reproductive endocrine system such as basic gonadal biology in the events of climate vulnerability, sex determination, sex reversal, stimulatory hormones, inhibitory hormones and receptors, environmental and chemical factor guiding reproduction, puberty, neuroendocrine regulation of reproduction etc. This book further describes how reproduction is not just indispensable for the existence or survival of an individual, but it is important for the survival of species. Chapters also address the concerns of anthropogenic activities on fish and the aquatic environment lead main trouble on physiological and reproductive processes of aquatic animals. This book offers an attractive compilation of highly relevant aspects of current and future of aquaculture, especially in view of the growing awareness of aquaculture, to food scientists working on commercial fish, animal biologists, fish geneticists etc. This book is very timely, and relevant to the sustainable development goals. The contents would be relevant to policy makers, working towards blue revolution and blue economy.
Ultrasound Diagnostic For Sturgeon
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Author : Yan Merkulov
language : en
Publisher: Applied Sturgeon Agency
Release Date :
Ultrasound Diagnostic For Sturgeon written by Yan Merkulov and has been published by Applied Sturgeon Agency this book supported file pdf, txt, epub, kindle and other format this book has been release on with Technology & Engineering categories.
The second edition of the manual on ultrasound diagnostics of the sturgeon reproductive system contains several significant additions based both on the appearance of new equipment for ultrasound diagnostics and on the results of recent studies of the authors. The new edition describes in detail the features of various types of ultrasonic sensors, including previously not used for sturgeon diagnostics. At the request of readers of the first edition, the features of the analysis of echograms obtained using a convex sensor are considered. The section describing the diagnosis of pathologies of the reproductive system of fish, including hermaphroditism, has been substantially expanded. The guide provides basic principles of ultrasound diagnostic and recommendations for the sturgeon ultrasound diagnostic equipment and workplace arrangements. There is a detailed description of ultrasound diagnostic procedure for identification of sex and maturity stage of sturgeon gonads. There is also a detailed instruction on ultrasound images analysis and description of specific diagnostic features. Annual sexual cycles with various inter-spawn intervals were for the first time analysed specifying the duration of each maturity stage in heat-reserve units. The principles of controlling linear and generative growth of sturgeons contained in replacement and breeding stocks of sturgeon farms had been defined. The Atlas contains more than a hundred illustrations, provided with detailed descriptions and notes which allow even a novice fish farmer to independently learn ultrasound diagnostic of sex and maturity stage of sturgeon gonads. The book is addressed to specialists and chief managers of sturgeon farms, the farmers involved in sturgeon breeding, scientists and students.
Practical Guideline For Ultrasound Diagnostic Of Sturgeon
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Author : Merkulov, Y.
language : en
Publisher: Aegitas
Release Date : 2017-09-22
Practical Guideline For Ultrasound Diagnostic Of Sturgeon written by Merkulov, Y. and has been published by Aegitas this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-09-22 with Science categories.
Ultrasound diagnostic is a tool that allows to successfully solve problems of not only early sex differentiation but also ongoing monitoring of gonadogenesis process or retrospective analysis, performed in accordance with the results of the bonitation. The materials introduced in this book are the result of many years of research and practical work on identification of sex and sturgeon maturity stages performed by the authors on sturgeon farms in Russia, Georgia, Uzbekistan Azerbaidzhan and other CIS countries using different methods. The guide provides basic principles of ultrasound diagnostic and recommendations for the sturgeon ultrasound diagnostic equipment and workplace arrangements. There is a detailed description of ultrasound diagnostic procedure for identification of sex and maturity stage of sturgeon gonads. There is also a detailed instruction on ultrasound images analysis and description of specific diagnostic features. Annual sexual cycles with various inter-spawn intervals were for the first time analysed specifying the duration of each maturity stage in heat-reserve units. The principles of controlling linear and generative growth of sturgeons contained in replacement and breeding stocks of sturgeon farms had been defined. The Atlas contains more than a hundred illustrations, provided with detailed descriptions and notes which allow even a novice fish farmer to independently learn ultrasound diagnostic of sex and maturity stage of sturgeon gonads. The book is addressed to specialists and chief managers of sturgeon farms, the farmers involved in sturgeon breeding, scientists and students.
Epigenetics In Aquaculture
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Author : Francesc Piferrer
language : en
Publisher: John Wiley & Sons
Release Date : 2023-06-27
Epigenetics In Aquaculture written by Francesc Piferrer and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-06-27 with Technology & Engineering categories.
EPIGENETICS IN AQUACULTURE This essential guide will allow you to understand how new developments in our knowledge of epigenetic mechanisms and epigenetic inheritance can be applied to improve aquaculture production and aquatic resource management and conservation. Epigenetics is the study of heritable changes in gene expression that are independent of alterations in the nucleotide sequence. It integrates genomic and environmental influences to shape the phenotype. Epigenetics is a field with particular relevance to aquaculture and aquatic organisms, since it underpins acclimatory responses to diverse and changing environments and inheritance of desired phenotypes. Epigenetics in Aquaculture provides a comprehensive introduction to epigenetics, epigenetic mechanisms, epigenetic inheritance, and research methods. It also provides the current state of the art on research and development on epigenetics in the major functions of aquatic organisms in the framework of aquaculture production. The fact that aquaculture is the fastest-growing sector of food production makes the book especially timely. Readers will also find: Detailed treatment of subjects including aquatic faunal reproduction, sex determination, growth regulation, nutritional programming, disease resistance, stress response and much more Survey of current research lacunae and the projected future of the discipline An authorial team of internationally renowned experts Epigenetics in Aquaculture is a valuable reference for researchers, biologists and advanced students in any area of marine science, oceanography, aquaculture, environmental science, and food production.
The Fish Oocyte
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Author : Patrick J. Babin
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-08-20
The Fish Oocyte written by Patrick J. Babin and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-08-20 with Nature categories.
This book addresses the growing needs in deciphering the biological processes associated with fish reproduction, in view of the growth of aquaculture and the dwindling natural stocks of commercially important fish. It presents a comprehensive overview on egg production in fish, from the standpoint of the oocyte. With this view in mind, the book includes chapters on oocyte development (oogenesis), hormonal regulation and hormone receptors, formation of the egg envelopes, growth, accumulation of nutrients and maternal transcripts, maturation, hydration, ovulation and fertilization. A special emphasis is placed on using state-of-the-art tools including electron microscopy for discerning the ultra-structure of the follicle and genomic/proteomic tools to fully understand biological basis of fish reproduction. Studies on promoting oocyte maturation, ovulation and spawning in farmed fish and preservation of fish oocytes at low temperatures are also included. The book will appeal to University lecturers, students, research scientists and those associated with culture of fish in freshwater or marine aquaculture.