SECTION I: SEX DETERMINATION AND DIFFERENTIATION MECHANIMSChapter 1 Sex differentiation in Atlantic cod (Gadus morhua L.):Morphological and Gene Expression StudiesChapter 2 Genomic Approaches to Study Genetic and EnvironmentalInfluences On Fish Sex Determination And Differentiation Chapter 3 Molecular Players Involved In Temperature-Dependent Sex Determination And Sex Differentiation In Teleost Fish Chapter 4 Characterization Of Sex Determination And Sex Differentiation Genes In Latimeria Chapter 5 Zebrafish Sex Determination And Differentiation: Involvement of FTZ-F1 Genes SECTION II: GENE EXPRESSION AND ENVIRONMENTAL EFFECTS ON SEX DETERMINATION Chapter 6 Gene Expression Analysis At The Onset of Sex Differentiation In Turbot (Scophthalmus Maximus) Chapter 7 Expression Profiles For Six Zebrafish Genes During Gonadal Sex Differentiation Chapter 8 Estrogen Exposure Overrides The Masculinizing Effect Of Elevated Temperature by a Downregulation of The Key Genes Implicated In Sexual Differentiation In A Fish With Mixed Genetic And Environmental Sex Determination Chapter 9 Genetics and Timing of Sex Determination in the East African Cichlid Fish Astatotilapia Burtoni Chapter 10 Sex Differentiation In Grayling (Salmonidae) Goes Through an All-Male Stage And Is Delayed In Genetic Males Who Instead Grow Faster Chapter 11 Large-Scale Transcriptome Sequencing Reveals Novel Expression Patterns For Key Sex-Related Genes In A Sex-Changing Fish.