The oceans are an important foundation of our lives - they regulate our climate and are an invaluable source of food. However, we threaten their health by heating up the planet, over-fishing and polluting these waters.

Most people know Ted Danson as the affable bartender Sam Malone in the long-running television series Cheers. But fewer realize that over the course of the past two and a half decades, Danson has tirelessly devoted himself to the cause of heading off a looming global catastrophe—the massive destruction of our planet's oceanic biosystems and the complete collapse of the world's major commercial fisheries. In Oceana, Danson details his journey from joining a modest local protest in the mid-1980s to oppose offshore oil drilling near his Southern California neighborhood to his current status as one of the world's most influential oceanic environmental activists, testifying before congressional committees in Washington, D.C.; addressing the World Trade Organization in Zurich, Switzerland; and helping found Oceana, the largest organization in the world focused solely on ocean conservation. In his incisive, conversational voice, Danson describes what has happened to our oceans in just the past half-century, ranging from the ravages of overfishing and habitat destruction to the devastating effects of ocean acidification and the wasteful horrors of fish farms. Danson also shares the stage of Oceana with some of the world's most respected authorities in the fields of marine science, commercial fishing, and environmental law, as well as with other influential activists. Combining vivid, personal prose with an array of stunning graphics, charts, and photographs, Ocean powerfully illustrates the impending crises and offers solutions that may allow us to avert them, showing you the specific courses of action you can take to become active, responsible stewards of our planet's most precious resource—its oceans.

How do oceans affect the world's climate? Why might coral reefs vanish in the future? What can you do to help save our oceans? For a global tour of Earth's threatened habitats, explore 'World in Peril.' This series offers a striking panorama of endangered habitats around the world. Stunning, large format photographs show the damage caused to our planet, but also the possible solutions that can lead to a greener future.

California's Bay-Delta estuary is a biologically diverse estuarine ecosystem that plays a central role in the distribution of California's water from the state's wetter northern regions to its southern, arid, and populous cities and agricultural areas. Recently, the Fish and Wildlife Service and the National Marine Fisheries Service required changes (reasonable and prudent alternatives, or RPAs) in water operations and related actions to avoid jeopardizing the continued existence and potential for recovery of threatened species of fish. Those changes have reduced the amount of water available for other uses, and the tensions that resulted have been exacerbated by recent dry years. The complexity of the problem of the decline of the listed species and the difficulty of identifying viable solutions have led to disagreements, including concerns that some of the actions in the RPAs might be ineffective and might cause harm and economic disruptions to water users, and that some of the actions specified in the RPAs to help one or more of the listed species might harm others. In addition, some have suggested that the agencies might be able to meet their legal obligation to protect species with less economic disruptions to other water users. The National Research Council examines the issue in the present volume to conclude that most of the actions proposed by two federal agencies to protect endangered and threatened fish species through water diversions in the California Bay-Delta are "scientifically justified." But less well-supported by scientific analyses is the basis for the specific environmental triggers that would indicate when to reduce the water diversions required by the actions.

Offers a multidisciplinary edited volume on policy dimensions of climate change for the world's oceans, for researchers, policymakers and activists.

Marine Mammals: Evolutionary Biology, Third Edition is a succinct, yet comprehensive text devoted to the systematics, evolution, morphology, ecology, physiology, and behavior of marine mammals. Earlier editions of this valuable work are considered required reading for all marine biologists concerned with marine mammals, and this text continues that tradition of excellence with updated citations and an expansion of nearly every chapter that includes full color photographs and distribution maps. - Comprehensive, up-to-date coverage of the biology of all marine mammals - Provides a phylogenetic framework that integrates phylogeny with behavior and ecology - Features chapter summaries, further readings, an appendix, glossary and an extensive bibliography - Exciting new color photographs and additional distribution maps

This United Nations report examines the current state of knowledge of the world's oceans, for policymakers, and provides a reference for marine science courses.