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Marine Mammals, 1st ed. 2019 Physiological and Behavioral Adaptations for an Aquatic Life

Langue : Anglais

Auteur :

Couverture de l’ouvrage Marine Mammals
This comprehensive book provides new insights into the physiological and behavioral adaptations of marine mammals for an aquatic life. It presents a detailed discussion of the anatomical, metabolic, thermoregulatory, locomotory, diving and behavioral adaptations of cetaceans (whales and dolphins), pinnipeds (seals, sea lions and walrus), sirenians (manatees and dugongs) and sea otters. The results are based on research using new technology, especially advances made during the past 25 years. Readers will gain an understanding of the remarkable adaptations that enable marine mammals to spend months at sea and make deep, long dives in pursuit of prey.

1. Introduction: Maintaining physiological homeostasis and the physical challenges of the marine environment.- 2. Taxonomy, anatomy and evolution.- 2.1 Pinnipeds (seals, sea lions and walrus).- 2.2 Cetaceans (whales and dolphins).- 2.3 Sirenians (manatees and dugongs).- 2.4 Sea otters.- 3. Metabolism and thermoregulation.- 3.1 Basal metabolism and allometry.- 3.2 Physiological thermoregulation and insulation.- 3.3 Behavioral thermoregulation.- 4. Locomotion.- 4.1 Hydrodynamics.- 4.2 Modes of locomotion.- 4.2 Energetics.- 4.3 Behavioral adaptations to reduce the cost of locomotion.- 5. Physiological adaptations for breath-hold diving.- 5.1 The dive response.- 5.1.1 A historical perspective.- 5.1.2 A new perspective.- 5.2 The role of globins and oxygen stores.- 5.3 Tissue level adaptations for maintaining aerobic metabolism in skeletal muscle.- 5.3.1 Convective oxygen transport and capillarity.- 5.3.2 Myoglobin distribution.- 5.3.3 Fiber types.- 5.3.4 Mitochondrial volume density.- 5.3.5 Enzyme activities.- 5.3.6 Lipids.- 5.4 Tissue level adaptations for maintaining aerobic metabolism in other organs.- 5.4.1 Heart.- 5.4.2 Splanchnic organs.- 5.4.3 Kidneys.- 5.5 Renal and splanchnic organ function.- 5.6 Oxidative stress.- 5.7 Fuel homeostasis.- 6. Morphological and behavioral adaptations to reduce the energetic cost of diving .-6.1 Hydrodynamics.- 6.2 Energetics.- 6.3 Behavioral adaptations and modes of locomotion.- 7. Effects of pressure.- 7.1 Blood gases.- 7.2 Mechanical effects.- 7.3 Buoyancy.- 8. Multi-level adaptations for maximizing aerobic dive duration and foraging efficiency: Case studies.- 8.1 Pinnipeds: Weddell seals, elephant seals and Steller sea lion.- 8.2 Cetaceans: bottlenose dolphins and sperm whales.- 8.3 Sea otters.- 9. Adaptations for herbivory: manatees and dugongs.- 10. Final remarks Appendix 1: Units of measure Appendix 2. SymbolsReferences.

Randall William Davis is an educator and researcher who studies the physiology and behavioral ecology of marine mammals and other aquatic vertebrates. His physiological research focuses on adaptations of marine mammals for deep, prolonged diving. Davis has continually emphasized the importance of studying aquatic animals in their natural environment and has spent many years developing animal-borne instruments that record video and monitor three-dimensional movements, swimming performance and environmental variables to better understand their behavior and ecology. His academic endeavors and 94 research expeditions have taken him to 64 countries and territories on seven continents and all of the world’s oceans.
Provides new insights into the remarkable physiological and behavioral adaptations of marine mammals

Reviews anatomical, metabolic, thermoregulatory, locomotory, diving and behavioral adaptations of cetaceans, pinnipeds, sirenians and sea otters

Covers information about the remarkable adaptation that enable marine mammals to spend much of their lives at sea while breath-hold diving to depths of up to 2,900 m

Date de parution :

Ouvrage de 192 p.

17.8x25.4 cm

Disponible chez l'éditeur (délai d'approvisionnement : 15 jours).

84,39 €

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