Note: Cover -- Half Title -- Series Page -- Title Page -- Copyright Page -- Dedication -- Table of Contents -- The Physiology of Fishes: Fifth Edition -- Preface for the Fifth Edition of The Physiology of Fishes -- Contributors -- Chapter 1 Evolution and Phylogeny -- 1.1 General Introduction -- 1.2 Jawless Vertebrates (Agnathans) -- 1.2.1 Order Myxiniformes (Hagfishes) -- 1.2.2 Order Petromyzontiformes (Lampreys) -- 1.3 Superclass Gnathostomata -- 1.4 Class Chondrichthyes (Ratfishes, Sharks, and Rays) -- 1.4.1 Subclass Holocephali (Chimaeras) -- 1.4.2 Subclass Euselachii, Infraclass Elasmobranchii (Neoselachii) -- 1.4.2.1 Division Selachii (Sharks) -- 1.4.2.2 Division Batomorphi (Rays) -- 1.5 Class Osteichthyes (Bony Fishes Including Tetrapods) -- 1.5.1 Subclass Sarcopterygii (Lobe-Finned Fishes and Tetrapods) -- 1.5.2 Subclass Actinopterygii (Ray-Finned Fishes) -- 1.5.2.1 Early-Branching Actinopterygii -- 1.5.2.2 Division Teleostei -- 1.5.2.3 Cohort Elopomorpha (Tarpons, Tenpounders, Bonefishes, Eels) -- 1.5.2.4 Cohort Osteoglossomorpha (Bony-Tongues) -- 1.5.2.5 Cohort Otocephala -- 1.5.2.6 Cohort Euteleostei -- 1.5.2.7 Unranked Clade Neoteleostei -- 1.5.2.8 Unranked Clade Acanthomorpha (Spiny-Rayed Fishes) -- 1.5.2.9 Series Percomorpha -- 1.6 Conclusion -- Literature Cited -- Chapter 2 Locomotion and Biomechanics -- 2.1 History of Fish Locomotion -- 2.1.1 Classification of Swimming -- 2.1.2 Body Caudal Fin Locomotion -- 2.1.3 Median and Paired Fin Locomotion -- 2.1.4 Gait Changes -- 2.2 Complexity of Fish Forces -- 2.2.1 General Biomechanics: Force, Power and Thrust -- 2.2.2 A Little about Muscle: Motor, Spring or Break? -- 2.2.3 Muscle Anatomy -- 2.2.4 Diversity of Fin Anatomy and Structure -- 2.3 Muscle Activity and Neurocontrol -- 2.3.1 Muscle Activity -- 2.3.2 BCF Swimming -- 2.3.3 Labriform Locomotion -- 2.3.4 Unsteady Swimming. , 2.3.5 Escape Response -- 2.3.6 Swimming in Unsteady Flow -- 2.3.7 Neuro Control -- 2.4 Amphibious Locomotion in Fishes -- 2.4.1 Diversity of Terrestrial Locomotion -- 2.5 Conclusion -- References -- Chapter 3 Gas Exchange -- 3.1 Introduction -- 3.2 From Environment to Gill Branchial Gas Transfer -- 3.2.1 Ventilation -- 3.2.2 Morphology -- 3.2.3 Diffusion across Membranes -- 3.2.4 The Osmorespiratory Compromise -- 3.3 Circulatory Transport of Respiratory Gases -- 3.3.1 Blood -- 3.3.1.1 Oxygen -- 3.3.1.2 Carbon Dioxide -- 3.3.2 Blood Flow and Perfusion -- 3.4 Diffusion at the Tissue Level -- 3.5 Conclusion -- Acknowledgements -- References -- Chapter 4 The Cardiovascular System -- 4.1 General Introduction -- 4.2 General Features of the Fish Cardiovascular System -- 4.2.1 Blood -- 4.2.2 Heart Morphology and Blood Flow Patterns -- 4.2.3 Cardiac Excitation-Contraction Coupling and Cardiovascular Parameters -- 4.2.4 Vasculature -- 4.2.5 Control Systems -- 4.3 Integrative Cardiovascular Function -- 4.3.1 Exercise -- 4.3.2 Digestion -- 4.3.3 High Temperature -- 4.3.4 Low Temperature -- 4.3.5 Limiting Oxygen Levels -- 4.4 Conclusion and Future Cardiovascular Research -- Acknowledgments -- References -- Chapter 5 Iono- and Osmoregulation -- 5.1 General Introduction -- 5.2 Evolutionary Strategies -- 5.2.1 Hagfish -- 5.2.2 Lamprey -- 5.2.3 Elasmobranchs -- 5.2.4 Teleosts -- 5.3 Physiology of Iono- and Osmoregulatory Tissues -- 5.3.1 Skin -- 5.3.2 Gills -- 5.3.2.1 Freshwater Fishes -- 5.3.2.2 Marine Fishes -- 5.3.3 Kidney -- 5.3.3.1 Freshwater Fishes -- 5.3.3.2 Marine Fishes -- 5.3.4 Gastrointestinal Tract -- 5.3.4.1 Marine Fishes -- 5.4 Euryhalinity -- 5.4.1 When Does Natural Selection Favour Euryhalinity? -- 5.4.2 Cellular Mechanisms of Osmosensing and Signal Transduction -- 5.5 Conclusion -- Acknowledgements -- References -- Chapter 6 The Digestive System. , 6.1 Overview -- 6.2 Primary Function of the Digestive System -- 6.3 Digestive System Morphology -- 6.3.1 Buccal Cavity, Pharynx, and Associated Structures -- 6.3.2 Oesophagus -- 6.3.3 Stomach -- 6.3.4 Intestine -- 6.3.5 Colon and Rectum -- 6.3.6 Associated Organs -- 6.3.7 Microbiome -- 6.4 Future Perspectives -- Acknowledgements -- References -- Chapter 7 Thermal Biology -- 7.1 Introduction -- 7.1.1 Thermal Strategies -- 7.1.2 Mechanisms of Endothermy in Fishes -- 7.2 Characterizing the Thermal Niche of a Fish -- 7.2.1 Thermal Tolerance -- 7.2.2 Thermal Performance -- 7.2.3 Thermal Compensation -- 7.3 Cellular and Molecular Effects of Temperature -- 7.3.1 Cellular Stress Response -- 7.3.2 Effects on Cellular Metabolism -- 7.3.3 Effects on Membranes -- 7.3.4 Temperature and Oxidative Stress -- 7.4 Effects on Whole-Organism Performance -- 7.4.1 Effects on Metabolism -- 7.4.2 Effects on the Cardiorespiratory System -- 7.4.3 Effects on Swimming Performance and Behaviour -- 7.5 Developmental Plasticity -- 7.5.1 Epigenetic Effects of Temperature -- 7.6 Thermal Adaptation -- 7.6.1 Adaptations to Constant Cold in Antarctic Fishes -- 7.7 Thermal Biology in a Changing World -- Acknowledgements -- References -- Chapter 8 Endocrinology: An Evolutionary Perspective on Neuroendocrine Axes in Teleosts -- 8.1 Neuroendocrine Axes in Vertebrates and Special Features in Teleosts -- 8.1.1 Control of Physiological Functions and Life Cycles -- 8.1.2 The Innovation of the Pituitary Gland in Vertebrates -- 8.1.3 Specific Aspects of Pituitary Functional Anatomy in Teleosts -- 8.2 Diversification of Neuroendocrine Actors via Gene Duplications -- 8.2.1 Ancient Origin of the Molecular Families of Neuroendocrine Actors -- 8.2.2 Gene Duplications of Neuroendocrine Actors -- 8.2.3 Vertebrate- and Teleost-Specific Whole-Genome Duplications and Impact on Neuroendocrine Actors. , 8.2.4 Conservation or Loss of Duplicated Paralogs and Species-Specific Diversity of Neuroendocrine Actors -- 8.3 The Thyrotropic Axis and the Control of Development, Metabolism, and Metamorphosis in Teleosts -- 8.3.1 Introduction to the Thyrotropic Axis -- 8.3.2 Specific Features of the Thyrotropic Axis in Teleosts -- 8.3.2.1 Teleost Metamorphosis and Role of the Thyroid Hormones (TH) -- 8.3.2.2 Knowledge Gaps in the Teleost Thyrotropic Axis -- 8.3.2.3 Impact of Gene Duplication, Conservation, or Loss on Teleost Thyrotropic Axis -- 8.4 The Somatotropic Axis and the Control of Growth and Pleiotropic Functions in Teleosts -- 8.4.1 Introduction to the Somatotropic Axis -- 8.4.2 Specific Features of the Somatotropic Axis in Teleosts -- 8.4.2.1 Various Roles in Teleosts -- 8.4.2.2 Multiple Hypophysiotropic Controls Integrated at the Pituitary Somatotroph Level in Teleosts -- 8.4.2.3 Impact of Gene Duplication, Conservation, or Loss on Teleost Somatotropic Axis -- References -- Chapter 9 Reproduction -- 9.1 General Introduction -- 9.2 Neuroendocrinology of Reproduction -- 9.2.1 GnRH -- 9.2.2 Other Neural Factors -- 9.2.2.1 Dopamine -- 9.2.2.2 KiSS -- 9.2.2.3 Additional Factors -- 9.3 Pituitary-Gonadal Axis -- 9.3.1 Steroids and Steroid Receptors -- 9.3.2 Oocyte Development and Maturation -- 9.3.3 Spermatogenesis -- 9.3.4 Sexual Determination and Sexual Differentiation -- 9.4 Environmental Effects on Fish Reproduction -- 9.4.1 Environmental Cues -- 9.4.1.1 Photoperiod -- 9.4.1.2 Temperature -- 9.4.2 Environmental Endocrine Disruption -- 9.5 Conclusion -- Acknowledgement -- References -- Chapter 10 Metabolism -- 10.1 Introduction -- 10.2 Levels of Metabolic Rate -- 10.3 Modulators of Metabolic Rate -- 10.3.1 Body Mass -- 10.3.2 Temperature -- 10.3.3 Hypoxia -- 10.4 Variation in Metabolic Rate Among and within Species. , 10.5 Ecological and Evolutionary Relevance of (Varation in) Metabolic Rate -- 10.6 Conclusion -- References -- Chapter 11 Hearing -- 11.1 Introduction -- 11.2 How and Why Hearing? -- 11.3 The Importance of Sound to Fishes Today -- 11.4 Primer on Underwater Sound -- 11.4.1 Underwater Sound and Fishes -- 11.5 How Do Fishes Hear? -- 11.5.1 The Inner Ear -- 11.5.2 Response of the Ear to Sound Stimulation -- 11.5.3 Ancillary Structures -- 11.6 Diversity of Fish Ears -- 11.7 What Do Fishses Hear? -- 11.7.1 Other Aspects of Hearing by Fishes -- 11.8 What Don't we Know about Fish Hearing (Future Directions)? -- 11.9 Anthropogenic Sound and Fishes -- References -- Chapter 12 Active Electroreception and Electrocommunication -- 12.1 Introduction to Electroreception and Electrogenesis -- 12.2 Classification of Electric Fishes Based on Electric Signal Type -- 12.3 Electrocommunication -- 12.4 Generalized Anatomy of the Electro-Sensory-Motor Pathways in Gymnotiform Weakly Electric Fishes -- 12.5 Structural Organization and Premotor Neural Regulation of the Pacemaker Nucleus -- 12.6 Endocrine Regulation and Neuromodulation of the Premotor and Motor Brain Centers -- 12.7 Endocrine Regulation of the Peripheral Electric Organ -- 12.8 Conclusion -- Acknowledgements -- References -- Chapter 13 Vision -- 13.1 Introduction -- 13.2 The Eye -- 13.2.1 Adnexa -- 13.2.2 Sclera/Cornea -- 13.2.3 Uvea -- 13.2.4 Lens -- 13.2.5 Aqueous and Vitreous Humour -- 13.2.6 Retina -- 13.2.6.1 Rods and Cones -- 13.2.6.2 Light/Dark Adaptation -- 13.2.6.3 Regional Variation in Retinal Structure -- 13.2.6.4 Visual Pigments -- 13.3 Visual Optics -- 13.3.1 Eye Shape -- 13.3.2 Image Formation -- 13.3.2.1 Resting Refractive State and Accommodation -- 13.3.2.2 Amphibious Vision -- 13.3.3 Pupil -- 13.3.4 Tapeta -- 13.3.5 Intraocular Filters -- 13.4 Visual Abilities -- 13.4.1 Absolute Sensitivity. , 13.4.2 Contrast.