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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Marine mammals. ; Electronic books.
    Description / Table of Contents: The must have reference on Marine Mammals.
    Type of Medium: Online Resource
    Pages: 1 online resource (575 pages)
    Edition: 2nd ed.
    ISBN: 9780080489346
    DDC: 599.5
    Language: English
    Note: Front Cover -- Marine Mammals: Evolutionary Biology -- Copyright Page -- CONTENTS -- Preface -- Acknowledgments -- Chapter 1. Introduction -- 1.1. Marine Mammals-"What Are They?" -- 1.2. Adaptations for Aquatic Life -- 1.3. Scope and Use of This Book -- 1.4. Time Scale -- 1.5. Early Observations of Marine Mammals -- 1.6. Emergence of Marine Mammal Science -- 1.7. Further Reading and Resources -- References -- PART I: Evolutionary History -- Chapter 2. Systematics and Classification -- 2.1. Introduction: Systematics-What Is It and Why Do It? -- 2.2. Some Basic Terminology and Concepts -- 2.3. How Do You Do Cladistics? -- 2.4. Testing Phylogenetic Hypotheses -- 2.5. Going Beyond the Phylogenetic Framework: Elucidating Evolutionary and Ecological Patterns -- 2.6. Taxonomy and Classification -- 2.7. Summary and Conclusions -- 2.8. Further Reading -- References -- Chapter 3. Pinniped Evolution and Systematics -- 3.1. Introduction -- 3.2. Origin and Evolution -- 3.3. Summary and Conclusions -- 3.4. Further Reading -- References -- Chapter 4. Cetacean Evolution and Systematics -- 4.1. Introduction -- 4.2. Origin and Evolution -- 4.3. Summary and Conclusions -- 4.4. Further Reading -- References -- Chapter 5. Sirenians and Other Marine Mammals: Evolution and Systematics -- 5.1. Introduction -- 5.2. Origin and Evolution of Sirenians -- 5.3. The Extinct Sirenian Relatives-Desmostylia -- 5.4. The Extinct Marine Bear-Like Carnivoran, Kolponomos -- 5.5. The Extinct Aquatic Sloth, Thalassocnus natans -- 5.6. The Sea Otter, Enhydra lutris -- 5.7. The Polar Bear, Ursus maritimus -- 5.8. Summary and Conclusions -- 5.9. Further Reading -- References -- Chapter 6. Evolutionary Biogeography -- 6.1. Introduction-What Is Biogeography and Why Is It Important? -- 6.2. Ecological Factors Affecting Distributions of Marine Mammals -- 6.3. Present Patterns of Distribution. , 6.4. Reconstructing Biogeographic Patterns -- 6.5. Past Patterns of Distribution -- 6.6. Summary and Conclusions -- 6.7. Further Reading and Resources -- References -- PART II: Evolutionary Biology, Ecology, And Behavior -- Chapter 7. Integumentary and Sensory Systems -- 7.1. Introduction -- 7.2. Integumentary System -- 7.3. Nerves and Sense Organs -- 7.4. Summary and Conclusions -- 7.5. Further Reading -- References -- Chapter 8. Musculoskeletal System and Locomotion -- 8.1. Introduction -- 8.2. Pinnipeds -- 8.3. Cetaceans -- 8.4. Sirenians -- 8.5. Sea Otter -- 8.6. Polar Bear -- 8.7. Summary and Conclusions -- 8.8. Further Reading -- References -- Chapter 9. Energetics -- 9.1. Introduction -- 9.2. Metabolic Rates -- 9.3. Thermoregulation -- 9.4. Energetics of Locomotion -- 9.5. Osmoregulation -- 9.6. Summary and Conclusions -- 9.7. Further Reading -- References -- Chapter 10. Respiration and Diving Physiology -- 10.1. Introduction -- 10.2. Problems of Deep and Prolonged Dives for Breath-Holders -- 10.3. Pulmonary and Circulatory Adaptations to Diving -- 10.4. Diving Response -- 10.5. Diving Behavior and Phylogenetic Patterns -- 10.6. Summary and Conclusions -- 10.7. Further Reading -- References -- Chapter 11. Sound Production for Communication, Echolocation, and Prey Capture -- 11.1. Introduction -- 11.2. Sound Propagation in Air and Water -- 11.3. Anatomy and Physiology of Sound Production and Reception -- 11.4. Functions of Intentionally Produced Sounds -- 11.5. Acoustic Thermometry of Ocean Climate and Low-Frequency Military Sonars -- 11.6. Summary and Conclusions -- 11.7. Further Reading -- References -- Chapter 12. Diet, Foraging Structures, and Strategies -- 12.1. Introduction -- 12.2. Seasonal and Geographical Patterns of Prey Abundance -- 12.3. Adaptations for Foraging in Pinnipeds -- 12.4. Feeding Specializations of Cetaceans. , 12.5. Feeding Specializations of Sirenians -- 12.6. Feeding Specializations of Other Marine Mammals -- 12.7. Summary and Conclusions -- 12.8. Further Reading -- References -- Chapter 13. Reproductive Structures, Strategies, and Patterns -- 13.1. Introduction -- 13.2. Anatomy and Physiology of the Reproductive System -- 13.3. Mating Systems -- 13.4. Lactation Strategies -- 13.5. Reproductive Patterns -- 13.6. Summary and Conclusions -- 13.7. Further Reading -- References -- Chapter 14. Population Structure and Dynamics -- 14.1. Introduction -- 14.2. Abundance and Its Determination in Marine Mammals -- 14.3. Techniques for Monitoring Populations -- 14.4. Population Structure and Dynamics -- 14.5. Summary and Conclusions -- 14.6. Further Reading -- References -- Chapter 15. Exploitation and Conservation -- 15.1. Introduction -- 15.2. Commercial Exploitation of Marine Mammals -- 15.3. Legal Framework for Marine Mammal Conservation and Protection -- 15.4. Incidental Taking of Marine Mammals -- 15.5. Environmental Contaminants -- 15.6. Single Beachings vs Mass Strandings -- 15.7. Ecotourism -- 15.8. Progress and the Future -- 15.9. Summary and Conclusions -- 15.10. Further Reading -- References -- Appendix: Classification of Marine Mammals -- Glossary -- Index.
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  • 2
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Marine mammals -- Evolution. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (739 pages)
    Edition: 3rd ed.
    ISBN: 9780123972576
    DDC: 599.5
    Language: English
    Note: Front Cover -- Marine Mammals -- Copyright -- Contents -- Preface -- Acknowledgments -- CHAPTER 1 - INTRODUCTION -- 1.1 MARINE MAMMALS-"WHAT ARE THEY?" -- 1.2 ADAPTATIONS FOR AQUATIC LIFE -- 1.3 SCOPE AND USE OF THIS BOOK -- 1.4 TIME SCALE -- 1.5 EARLY OBSERVATIONS OF MARINE MAMMALS -- 1.6 EMERGENCE OF MARINE MAMMAL SCIENCE -- 1.7 FURTHER READING AND RESOURCES -- References -- Part-1 - Evolutionary History -- Chapter 2 - Phylogeny, Taxonomy, and Classification -- 2.1 INTRODUCTION: INVESTIGATING EVOLUTIONARY HISTORIES -- 2.2 SOME BASIC TERMINOLOGY AND CONCEPTS -- 2.3 HOW DO YOU BUILD A PHYLOGENETIC TREE? -- 2.4 TESTING PHYLOGENETIC HYPOTHESES -- 2.5 APPLYING PHYLOGENIES: ELUCIDATING EVOLUTIONARY AND ECOLOGICAL PATTERNS -- 2.6 TAXONOMY AND CLASSIFICATION -- 2.7 SUMMARY AND CONCLUSIONS -- 2.8 FURTHER READING AND RESOURCES -- References -- Chapter 3 - Pinniped Evolution and Systematics -- 3.1 INTRODUCTION -- 3.2 ORIGIN AND EVOLUTION -- 3.3 SUMMARY AND CONCLUSIONS -- 3.4 FURTHER READING AND RESOURCES -- References -- Chapter 4 - Cetacean Evolution and Systematics -- 4.1 INTRODUCTION -- 4.2 ORIGIN AND EVOLUTION -- 4.3 SUMMARY AND CONCLUSIONS -- 4.4 FURTHER READING AND RESOURCES -- References -- Chapter 5 - Sirenians and Other Marine Mammals: Evolution and Systematics -- 5.1 INTRODUCTION -- 5.2 ORIGIN AND EVOLUTION OF SIRENIANS -- 5.3 THE EXTINCT SIRENIAN RELATIVES-DESMOSTYLIA -- 5.4 THE EXTINCT MARINE BEAR-LIKE CARNIVORAN, KOLPONOMOS -- 5.5 THE EXTINCT AQUATIC SLOTH, THALASSOCNUS NATANS -- 5.6 MARINE OTTERS -- 5.7 THE POLAR BEAR, URSUS MARITIMUS -- 5.8 SUMMARY AND CONCLUSIONS -- 5.9 FURTHER READING AND RESOURCES -- References -- Chapter 6 - Evolution and Geography -- 6.1 INTRODUCTION -- 6.2 SPECIES IDENTITY -- 6.3 SPECIATION -- 6.4 ECOLOGICAL FACTORS AFFECTING DISTRIBUTIONS OF MARINE MAMMALS -- 6.5 PRESENT PATTERNS OF DISTRIBUTION. , 6.6 RECONSTRUCTING BIOGEOGRAPHIC PATTERNS -- 6.7 PAST PATTERNS OF DISTRIBUTION -- 6.8 SUMMARY AND CONCLUSIONS -- 6.9 FURTHER READING AND RESOURCES -- References -- Part-2 - Evolutionary Biology, Ecology, and Behavior -- Chapter 7 - Integumentary and Sensory Systems -- 7.1 INTRODUCTION -- 7.2 INTEGUMENTARY SYSTEM -- 7.3 NERVES AND SENSE ORGANS -- 7.4 SUMMARY AND CONCLUSIONS -- 7.5 FURTHER READING AND RESOURCES -- References -- Chapter 8 - Musculoskeletal System and Locomotion -- 8.1 INTRODUCTION -- 8.2 PINNIPEDS -- 8.3 CETACEANS -- 8.4 SIRENIANS -- 8.5 SEA OTTER -- 8.6 POLAR BEAR -- 8.7 SUMMARY AND CONCLUSIONS -- 8.8 FURTHER READING AND RESOURCES -- References -- Chapter 9 - Energetics -- 9.1 INTRODUCTION -- 9.2 METABOLIC RATES -- 9.3 THERMOREGULATION -- 9.4 ENERGETICS OF LOCOMOTION -- 9.5 OSMOREGULATION -- 9.6 SUMMARY AND CONCLUSIONS -- 9.7 FURTHER READING AND RESOURCES -- References -- Chapter 10 - Respiration and Diving Physiology -- 10.1 INTRODUCTION -- 10.2 CHALLENGES OF DEEP AND PROLONGED DIVES FOR BREATH-HOLDERS -- 10.3 PULMONARY AND CIRCULATORY ADAPTATIONS TO DIVING -- 10.4 DIVING RESPONSE -- 10.5 DIVING BEHAVIOR AND PHYLOGENETIC PATTERNS -- 10.6 SUMMARY AND CONCLUSIONS -- 10.7 FURTHER READING AND RESOURCES -- References -- Chapter 11 - Sound Production for Communication, Echolocation, and Prey Capture -- 11.1 INTRODUCTION -- 11.2 SOUND PROPAGATION IN AIR AND WATER -- 11.3 ANATOMY AND PHYSIOLOGY OF SOUND PRODUCTION AND RECEPTION -- 11.4 FUNCTIONS OF INTENTIONALLY PRODUCED SOUNDS -- 11.5 ACOUSTIC THERMOMETRY OF OCEAN CLIMATE AND LOW-FREQUENCY MILITARY SONARS -- 11.6 SUMMARY AND CONCLUSIONS -- 11.7 FURTHER READING AND RESOURCES -- References -- Chapter 12 - Diet, Foraging Structures, and Strategies -- 12.1 INTRODUCTION -- 12.2 SEASONAL AND GEOGRAPHICAL PATTERNS OF PREY ABUNDANCE -- 12.3 ADAPTATIONS FOR FORAGING IN PINNIPEDS. , 12.4 FEEDING SPECIALIZATIONS OF CETACEANS -- 12.5 FEEDING SPECIALIZATIONS OF SIRENIANS -- 12.6 FEEDING SPECIALIZATIONS OF OTHER MARINE MAMMALS -- 12.7 SUMMARY AND CONCLUSIONS -- 12.8 FURTHER READING AND RESOURCES -- References -- Chapter 13 - Reproductive Structures, Strategies, and Patterns -- 13.1 INTRODUCTION -- 13.2 ANATOMY AND PHYSIOLOGY OF THE REPRODUCTIVE SYSTEM -- 13.3 MATING SYSTEMS -- 13.4 LACTATION STRATEGIES -- 13.5 REPRODUCTIVE PATTERNS -- 13.6 SUMMARY AND CONCLUSIONS -- 13.7 FURTHER READING AND RESOURCES -- References -- Chapter 14 - Population Structure and Dynamics -- 14.1 INTRODUCTION -- 14.2 ABUNDANCE AND ITS DETERMINATION IN MARINE MAMMALS -- 14.3 TECHNIQUES FOR MONITORING POPULATIONS -- 14.4 POPULATION STRUCTURE AND DYNAMICS -- Anchor 765 -- Anchor 766 -- 14.5 SUMMARY AND CONCLUSIONS -- 14.6 FURTHER READING AND RESOURCES -- References -- Part-3 - Exploitation, Conservation, and Management -- Chapter 15 - Exploitation and Conservation -- 15.1 INTRODUCTION -- 15.2 EXPLOITATION OF MARINE MAMMALS -- 15.3 MARINE MAMMAL CONSERVATION AND PROTECTION -- 15.4 PROGRESS AND THE FUTURE -- 15.5 SUMMARY AND CONCLUSIONS -- 15.6 FURTHER READING AND RESOURCES -- References -- APPENDIX -- CLASSIFICATION OF MARINE MAMMALS -- CARNIVORA -- CETARTIODACTYLA -- SIRENIA (ILLIGER 1811) -- References -- Color Plates -- Glossary -- Index.
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  • 3
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Marine mammals-Encyclopedias. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (1195 pages)
    Edition: 3rd ed.
    ISBN: 9780128043813
    DDC: 599.503
    Language: English
    Note: Front Cover -- Inside Front Cover -- Encyclopedia of Marine Mammals -- Copyright Page -- Dedication -- Contents -- Contents by Subject Area -- Anatomy and Physiology -- Behavior and Life History -- Ecology and Population Biology -- Evolution and Systematics -- Human Effects and Interactions -- Organisms and Faunas -- Research Methodology -- Contributors -- Preface to the Third Edition -- Preface to the First and Second Editions -- Marine Mammal Species -- Order Carnivora -- Family Otariidae -- Family Odobenidae -- Family Phocidae -- Family Ursidae -- Family Mustelidae -- Order Cetartiodactyla -- Suborder Cetacea -- Family Balaenidae -- Family Neobalaenidae -- Family Eschrichtiidae -- Family Balaenopteridae -- Family Physeteridae -- Family Kogiidae -- Family Ziphiidae -- Family Platanistidae -- Family Iniidae -- Family Lipotidae -- Family Pontoporiidae -- Family Monodontidae -- Family Delphinidae -- Family Phocoenidae -- Order Sirenia -- Family Trichechidae -- Family Dugongidae -- References -- A -- Abundance Estimation -- I. Distance Sampling -- A. Line-transect Sampling -- 1. Survey Design -- 2. Assumptions -- 3. Estimation -- 4. Multiple-Covariate Distance Sampling -- 5. Modeling Density Surfaces -- 6. Uncertain Detection on the Transect Line -- 7. Automated Design Algorithms and GIS -- B. Strip-Transect Sampling -- C. Cue Counting -- D. Acoustic Surveys -- II. Mark-Recapture -- A. Estimation from a Tagged Subset of Animals -- 1. The Petersen Estimator -- 2. Chapman's Modified Estimator -- 3. Assumptions -- 4. Estimation of Pinniped Numbers by Mark-Recapture -- 5. Mark-Recovery Methods -- B. Use of Natural Markings -- C. Spatially Explicit Capture-recapture -- III. Migration Counts -- IV. Colony Counts -- References -- Aerial Behavior -- I. Whale Breaching -- II. Dolphin Leaping -- III. Other Active Aerial Behaviors. , IV. Potential Reasons for Aerial Behaviors -- V. Fluking -- References -- Age Estimation -- I. Introduction -- II. Growth Layer Terminology -- III. Calibration of Annual Layers -- IV. Tissues Commonly Used to Obtain Absolute Age Estimates -- V. Consistency and Repeatability of Absolute Age Estimates -- VI. Growth-Layer Tissues as Recording Structures -- VII. When Absolute Age Estimates are not Feasible -- References -- Aggressive Behavior, Intraspecific -- I. Male-Male Competition for Mates -- A. Pinnipeds -- B. Cetaceans -- C. Other Aquatic Mammals -- II. Size, Special Weapons, and the Consequences of Aggression -- III. Avoiding Fights -- IV. Group Raids and Other Forms of Male Harassment of Reproductive Females -- V. Female Agonistic Behavior -- VI. Aggression Toward Young -- A. Aggression Toward and Killing of Young by Males -- B. Abuse and Killing of the Young by Females -- C. Male Violent Behavior Toward Interspecific Females and Pups -- References -- Albinism -- I. Pigmentation -- II. Albinism and Marine Mammals -- III. Problems Associated With Albinism -- References -- Amazon River Dolphin: Inia geoffrensis -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History -- VI. Interactions With Humans -- References -- Ambergris -- References -- Antarctic Fur Seal: Arctocephalus gazella -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History -- VI. Interactions With Humans -- References -- Antarctic Marine Mammals -- I. Background -- II. Antarctic Species -- III. Diet -- IV. Exploitation and Recovery -- V. Conservation -- References -- Archaeocetes, Archaic -- References -- Arctic Marine Mammals -- I. Introduction -- II. Cetacean Community -- III. Pinniped Community -- IV. Polar Bears. , V. Important Habitats for Arctic Marine Mammals -- A. Sea Ice -- B. Polynyas -- C. Glacial Ice -- D. Nonice Habitats -- VI. Conservation and Management Challenges -- References -- Atlantic Spotted Dolphin: Stenella frontalis -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History -- VI. Interactions With Humans -- References -- Atlantic White-Sided Dolphin: Lagenorhynchus acutus -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History -- VI. Interactions With Humans -- References -- Australian Sea Lion: Neophoca cinerea -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History -- VI. Interactions With Humans -- References -- Australian Snubfin Dolphin: Orcaella heinsohni -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History -- VI. Interactions With Humans -- References -- B -- Baculum -- References -- Baiji: Lipotes vexillifer -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History -- VI. Interactions With Humans -- References -- Baikal Seal: Pusa sibirica -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History -- VI. Interactions With Humans -- References -- Balance -- I. Introduction -- II. Comparative Morphology -- III. Functional Interpretation -- References -- Baleen -- References -- Baleen Whales (Mysticeti) -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- A. Sound Production -- B. Swimming and Migration. , C. Social Activity -- V. Life History -- VI. Interactions With Humans -- References -- Baleen Whales, Evolution -- I. Introduction -- II. Toothed Mysticetes -- III. Edentulous Mysticetes -- IV. Tooth Loss, Origin of Baleen, and Bulk Filter Feeding -- References -- Barnacles -- I. Life History -- II. Sessile Barnacles -- III. Stalked Barnacles -- IV. Barnacles and Marine Mammals -- References -- Basilosaurids and Kekenodontids -- I. Characteristics -- II. Taxonomy -- III. Life History -- A. Locomotion -- B. Feeding -- C. Habitat and Ecology -- IV. Phylogenetic Relationships -- References -- Beaked Whales, Overview -- I. Classification -- II. Diagnostic Characteristics and Taxonomy -- III. Distribution and Ecology -- A. Habitat -- B. Behavior -- C. Vocalizations -- D. Diet -- E. Social Organization -- IV. Life History and Reproduction -- V. Status, Conservation, and Interactions With Humans -- References -- Bearded Seal: Erignathus barbatus -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History -- VI. Interactions With Humans -- References -- Behavior, Overview -- I. Foraging Behavior: How to Find, Select, and Process Prey -- II. Avoiding Predators and Defense From Predators -- III. Migration and Orientation -- IV. Competition and Agonistic Behavior -- V. Courtship and Sexual Behavior -- VI. Parental Behavior -- VII. Social Behavior and Social Relationships -- VIII. Conclusions -- References -- Beluga Whale: Delphinapterus leucas -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- VI. Life History -- VII. Interactions With Humans -- References -- Berardius Beaked Whales: Berardius bairdii and B. arnuxii -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology. , IV. Behavior and Physiology -- V. Life History -- IV. Interactions With Humans -- References -- Biogeography -- I. Types of Distributions -- II. Ecology and History Determine Distribution -- III. Taxonomic Patterns -- IV. Conclusion -- References -- Biotelemetry -- I. Archival Tags -- II. Transmitting Systems -- III. Biological Insights -- IV. Challenges and Future Developments -- References -- Blubber -- I. The Structure of Blubber -- A. Tissue Characteristics -- B. Variation in Thickness and Proximate Composition -- C. The Lipids in Blubber -- II. Role of Blubber in Temperature Regulation: Heat Conservation and Dissipation -- III. Role of Blubber in Energy Storage and Water Balance -- IV. Role of Blubber in Locomotion -- V. Insights From the Study of Blubber -- References -- Blue Whale: Balaenoptera musculus -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- VI. Interactions With Humans -- References -- Bones and Teeth, Histology of -- I. Bone -- A. Bone Structure and Composition -- B. Bone Formation, Growth, and Remodeling -- C. Marine Mammal Bone -- II. Cementum -- A. Cementum Structure and Composition -- B. Marine Mammal Cementum -- III. Dentine -- A. Dentine Structure and Composition -- B. Marine Mammal Dentine -- IV. Enamel -- A. Enamel Structure and Composition -- B. Marine Mammal Enamel -- References -- Bottlenose Dolphin, Tursiops truncatus, Common Bottlenose Dolphin -- I. Characters and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History -- VI. Interactions With Humans -- References -- Bottlenose Dolphin, Tursiops aduncus, Indo-Pacific Bottlenose Dolphin -- I. Characteristics and Taxonomy -- II. Distribution and Abundance -- III. Ecology -- IV. Behavior and Physiology -- V. Life History. , VI. Interactions With Humans.
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  • 4
    Keywords: Marine mammals Encyclopedias ; Marine mammals Encyclopedias ; Marine mammals - Encyclopedias ; Meeressäugetiere ; Wörterbuch ; Enzyklopädie ; Wörterbuch ; Meerestiere ; Meeressäugetiere ; Meeressäugetiere
    Type of Medium: Image
    Pages: xxxi, 1157 Seiten , Illustrationen, Diagramme, Karten , 27.6 cm
    Edition: Third edition
    ISBN: 9780128043271 , 012804327X
    DDC: 599.5
    RVK:
    Language: English
    Note: Literaturangaben
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  • 5
    ISSN: 1751-8369
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Geosciences
    Notes: Kongsfjorden is a glacial fjord in the Arctic (Svalbard) that is influenced by both Atlantic and Arctic water masses and harbours a mixture of boreal and Arctic flora and fauna. Inputs from large tidal glaciers create steep environmental gradients in sedimentation and salinity along the length of this fjord. The glacial inputs cause reduced biomass and diversity in the benthic community in the inner fjord. Zooplankton suffers direct mortality from the glacial outflow and primary production is reduced because of limited light levels in the turbid, mixed inner waters. The magnitude of the glacial effects diminishes towards the outer fjord. Kongsfjorden is an important feeding ground for marine mammals and seabirds. Even though the fjord contains some boreal fauna, the prey consumed by upper trophic levels is mainly Arctic organisms. Marine mammals constitute the largest top-predator biomass, but seabirds have the largest energy intake and also export nutrients and energy out of the marine environment. Kongsfjorden has received a lot of research attention in the recent past. The current interest in the fjord is primarily based on the fact that Kongsfjorden is particularly suitable as a site for exploring the impacts of possible climate changes, with Atlantic water influx and melting of tidal glaciers both being linked to climate variability. The pelagic ecosystem is likely to be most sensitive to the Atlantic versus Arctic influence, whereas the benthic ecosystem is more affected by long-term changes in hydrography as well as changes in glacial runoff and sedimentation. Kongsfjorden will be an important Arctic monitoring site over the coming decades and a review of the current knowledge, and a gap analysis, are therefore warranted. Important knowledge gaps include a lack of quantitative data on production, abundance of key prey species, and the role of advection on the biological communities in the fjord.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 16 (2000), S. 0 
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The size and composition of groups of harbor seals at two haul-out sites were studied during the breeding season of 1989, in the Passamaquoddy Bay region of Atlantic Canada. Evidence of segregation both by age and sex was found in the distinct composition of the two groups. One group contained mainly males and no pups, and the other had a sex ratio not significantly different from one and contained pups. The proportion of females increased at the nursery site with the onset of birthing in the region while the proportion of males increased through the breeding season at the other site. No increase in the number of adults, in total, was detected over the study period, suggesting that sexual segregation and not a change in haul-out frequency was responsible for the disparity in the sex structure of the two groups. The proportion of juveniles was significantly greater at the male dominated site than at the nursery site.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 12 (1996), S. 0 
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 18 (2002), S. 0 
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Diet-tissue isotopic fractionation of carbon (C) and nitrogen (N) isotopes in short- and longer-term diet integrators of diet (i. e., blood serum and red cells), that involve non-invasive sampling techniques was examined using three species of phocid seals (harbor seals, gray seals, and harp seals) fed a known diet. Variability in diet-tissue fractionation values within and between species was also scrutinized to determine the legitimacy of using values obtained from one species to explore trophic positions and diets of other related species. All captive seals raised on a constant diet had tissues enriched in 13C and 15N relative to their diet. Diet-tissue isotopic fractionation values were generally consistent among conspecifics and among phocid species for a given tissue. Trophic isotopic enrichment in 13C was significantly higher in red blood cells (+1.5%±) than in blood serum (+0.8%±), whereas the reverse was observed for nitrogen isotopes (+1.7%± in red cells vs. +3.1%± in serum). However, 13C-depleted lipids were not extracted from blood tissues in this study. This results in a downward bias in the diet-tissue fractionation factors for carbon for both red cells and blood serum, particularly the latter because of their significantly higher lipid contents (x̄± SD = 14.6 ± 2.3%; n= 20; red blood cells 3.8 ± 0.9%±; n= 50, muscle 7.7 ± 2.0; n= 21) in marine mammals.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 13 (1997), S. 0 
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In this study we report the first documentation of mating between harp (Phoca groenlandica) and hooded seals (Cystophora cristata). The production of this hybrid was quite unusual, being the result of a cross between parents of different genera which are morphologically dissimilar and have quite different mating behavior and dramatically different body sizes. The molecular techniques (mtDNA and macrosatellite nuclear DNA banding patterns) used in this study will undoubtedly be applied widely to many different taxa in the near future, allowing us to re-examine many suspected cases of hybridization among marine mammals and, in a larger context, the meaning of the species concept.
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