Summarizing a 15-year study of the seabird community on this small group of rocks about 20 miles offshore of San Francisco, this volume is both a detailed account of a seabird breeding ecology and a challenge to the prevailing conception of ecological stability as the typical seabird lifestyle. With

Centuries ago, when penguins were first encountered by European explorers, they were not thought to be birds but rather a fish-like relative. Subsequent accumulation of knowledge has shown penguins to be an avian species with unrivaled aquatic attributes, owing to a number of evolutionary adaptations: shape change, low drag, ability to regulate buoyancy, and extraordinary surface compliancy from their featheration. They are indeed the most extremely specialized diving bird, having given up flight (which otherwise is hugely advantageous) to the benefit of underwater prowess (such as speed, maneuverability and an ability to exploit an extraordinary range of depths). This flightlessness, however, also comes with costs that are substantial for a seabird (such as the inability to cover large distances quickly in reaction to ephemeral prey); and the energy needed to cope with moving through an aqueous environment, which is more resistant than air. For penguins, the high energetic costs in exploiting the ocean environment thus makes them especially sensitive to changes in food availability or their access to their prey.   While a number of “penguin books� cover the natural history, mainly of breeding aspects, few address in much detail the incredible aquatic nature of these creatures. A huge amount of information has been amassed over recent past decades thanks to dramatic advances in microelectronics, bio-logging and maturation of some long-term studies of penguin life history. This work represents an integration of all these data with charts, maps and graphs, along with richly illustrated photos by experts in the field.    

The great white shark, Carcharodon carcharias, is a marquee predator made famous by movie and myth. This text brings together the real evidence of both ecology and behaviour of these animals. This international team of separates fact from fiction and establishes a baseline from which additional research of great white sharks and sharks in general might proceed. The chapters are divided into sections on the geographic distribution, evolutionary history, behaviour with particular emphasis on the predatory relationship to seals and sea lions, movements and abundance of the species, and its interactions with man. Many of the scientific contributions resulted from the 1993 symposium in Bodega Bay, California, that attracted more than 80 specialists from around the world.