Sexual plasticity and gametogenesis in fishes
著者
書誌事項
Sexual plasticity and gametogenesis in fishes
（Fish, fishing and fisheries）（Marine biology）
Nova Science Publishers, 2013
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注記
Includes bibliographical references and index
内容説明・目次
内容説明
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.
目次
- Preface
- Involvement of Neuropeptides in Gonadotropin Secretion in Teleost Fish
- Neuroendocrine Control of Lunar-Synchronized Spawning Rhythm in Grass Puffer
- Cytokines as Intraovarian Mediators of Luteinizing Hormone-Induced Ovulation in Fish
- Teleosts as Model for Environmental Risk Assessment
- Atherinopsid Fishes as Models for the Study of Temperature-Dependent Sex Determination: Physiology of Gonadal Sex Differentiation in Pejerrey Odontesthes Bonariensis
- Developmental Aspects of Reproductive Hormones in Fish
- Dimorphisms in the Brain & Involvement of Various Neurosubstances in Fish Reproduction: An Overview
- Ovarian Catecholestrogens: Role in Final Oocyte Maturation
- Understanding the Mechanism of Oocyte Maturation & Ovulation to Induce Spawning for Seed-Production in the Japanese Eel: Tough & Challenging Task
- Transgenic Medaka Lines with a Visible Marker for Phenotypic Sex: Genetic Analyses of an XY Sex-Reversal
- Hypothalamic Regulation of Pituitary Gonadotropins
- Sexual Plasticity of Behaviour in Goldfish
- Molecular Mechanisms of Gonadal Sex Differentiation & Sex-Reversal in Fish: Tilapia & Medaka
- Physiological & Endocrinological Mechanism of Sex Change in the Grouper
- Some Non-Classical Intragonadal Regulators of Fish Reproduction
- Involvement of Brain-Pituitary-Gonadal Axis on the Regulation of Reproductive Cycle in Female Chub Mackerel
- Teleosts are Classical Models for the Study of Oogenesis & Shift in Steroidogenesis
- Function of Germ Cells in Sex Differentiation
- Fish Gonadotropin Receptors
- Regulation of Teleost Reproduction by Brain-Pituitary Axis
- Perspectives on Gonadotropin-Releasing Hormone-Gonadotropins-Monoamines: Relevance to Gonadal Differentiation & Maturation in Teleosts
- Zebrafish as a Vertebrate Model System for Developmental Biology & Biomedical Research
- Sperm Maturation in Teleosts: Role of Androgens & Progestins in Our Present Understanding to Emerging New Concepts
- Expression Profiling of Various Marker Genes Involved in Gonadal Differentiation of Teleosts: Molecular Understanding of Sexual Plasticity
- Membrane Progestin Receptor, a Key Mediator of Final Oocyte Maturation in Fish
- Index.
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