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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.
"The Biology of Sharks and Rays" is a comprehensive resource on the
biological and physiological characteristics of the cartilaginous
fishes: sharks, rays, and chimaeras. In sixteen chapters, organized
by theme, A. Peter Klimley covers a broad spectrum of topics,
including taxonomy, morphology, ecology, and physiology. For
example, he explains the body design of sharks and why the ridged,
tooth-like denticles that cover their entire bodies are present on
only part of the rays' bodies and are absent from those of
chimaeras. Another chapter explores the anatomy of the jaws and the
role of the muscles and teeth in jaw extension, seizure, and
handling of prey. The chapters are richly illustrated with pictures
of sharks, diagrams of sensory organs, drawings of the body
postures of sharks during threat and reproductive displays, and
maps showing the extent of the species' foraging range and
long-distance migrations. Each chapter commences with an anecdote
from the author about his own personal experience with the topic,
followed by thought-provoking questions and a list of recommended
readings in the scientific literature. The book will be a useful
textbook for advanced ichthyology students as well as an
encyclopedic source for those seeking a greater understanding of
these fascinating creatures.
Marine biologist Pete Klimley swims with the sharks. He was one of
the first scientists to free-dive among sharks, and he has spent
nearly thirty years studying shark behavior, sometimes swimming in
schools of several hundred sharks. From his firsthand observations
he has learned that sharks are not the vicious man-eaters that we
imagine, but fascinating animals with complex behaviors. Most
people who think of sharks at all think immediately of great white
sharks. But there are more than four hundred species of shark. Dr.
Klimley has studied several species, most notably the great white
and the hammerhead. (He describes the great white as the athlete
among sharks, and the hammerhead as the Ph.D. of the shark world.)
In The Secret Life of Sharks Dr. Klimley reveals the significant
discoveries he made about hammerhead navigation and great white
eating habits. By studying hammerheads gathered around underwater
seamounts, Dr. Klimley learned that hammerheads rely on
sophisticated tracking of ocean-floor magnetism to navigate. His
long-term study of great white sharks off the California coast
demonstrated that these huge sharks prefer to eat seals and sea
lions because of the energy contained in their fatty bodies. They
are selective eaters, not the man-eaters we expect, and they
sometimes go weeks between meals. But Dr. Klimley did observe a
ritualized behavior that great whites practice in order to avoid
deadly disputes over prey that one shark has captured and another
wants. Although we have learned a great deal about shark behavior,
says Dr. Klimley, there is much that we do not know. Unfortunately
we are destroying these magnificent creatures of the deep through
overfishing and degradation of the oceans. Already some populations
of sharks have declined steeply. Vividly written by one of the
foremost authorities on sharks, The Secret Life of Sharks is a
fascinating account of some of the world's most magnificent
animals.
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