New PDF release: Locomotion of Animals

By R. McNeill Alexander

ISBN-10: 0412000016

ISBN-13: 9780412000010

ISBN-10: 0412000113

ISBN-13: 9780412000119

ISBN-10: 9401160090

ISBN-13: 9789401160094

ISBN-10: 9401160112

ISBN-13: 9789401160117

How can geckoes stroll at the ceiling and basilisk lizards run over water? What are the aerodynamic results that let small bugs to fly? What are the relative benefits of squids' jet-propelled swimming and fishes' tail-powered swimming? Why do horses swap gait as they raise velocity? What determines our personal vertical jump? fresh technical advances have significantly elevated researchers' skill to respond to those questions with simple task and in detail.

This textual content offers an updated evaluate of the way animals run, stroll, leap, move slowly, swim, leap, hover, and fly. except for purely the tiny creatures that use cilia, it covers all animals that energy their pursuits with muscle--from roundworms to whales, clams to elephants, and gnats to albatrosses. The creation units out the final ideas governing all modes of animal locomotion and considers the functionality criteria--such as velocity, persistence, and economy--that have formed their choice. It introduces energetics and optimality as easy rules. The textual content then tackles all the significant modes through which animals movement on land, in water, and during air. It explains the mechanisms concerned and the actual and organic forces shaping these mechanisms, paying specific cognizance to strength costs.

Focusing on basic rules yet greatly discussing a large choice of person circumstances, it is a fantastic synthesis of present wisdom approximately animal locomotion. it will likely be greatly priceless to complex undergraduates, graduate scholars, and quite a number specialist biologists, physicists, and engineers.

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Extra resources for Locomotion of Animals

Sample text

If a hydrofoil is given too large an angle of attack it will stall. Consequently, there is a minimum speed below which a particular fin cannot provide the lift required of it. A shark or tunny that is denser than the water it lives in, cannot swim slower than this speed, which can be estimated from the areas of its hydrofoils. 6 m/s for a skipjack tuna (Euthynnus~ Magnusson, 1978), both of mass 1 kg. These are close to the lowest speeds at which the fish .. SWIm 10 aquana. 1c) has fins only at its posterior end.

These swim in solutions containing ATP, usually with a regular and apparently normal metachronal rhythm. Since the experiment prevented any nerve-like coordination involving the cell membrane it seems likely that the coordination is a purely mechanical effect. Cilia normally beat in one direction, but the direction can be reversed. If Paramecium collides with an obstacle it reverses its cilia, backs off and advances again, usually in a different direction. It has been shown by experiments with detergent-treated Paramecium that the cilia beat as required for forward swimming when the concentration of calcium ions in the cell is very low, but reverse when the concentration is higher.

In others it may be better to glide at as 56 LOCOMOTION OF ANIMALS airspeed u, " 'I, I II '1- I', , :-.... a airspeed, m/s O· 20 10 40 model bat\ vulture -0

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