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Author: Carl G. Edelstam
Publisher:
ISBN:
Category : Animal migration
Languages : en
Pages : 80
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Book Description
Some of the hypotheses put forward in recent years to account for vertebrate navigation ability are examined theoretically and by experiments. Methods of interfering with the suggested external stimuli and the suggested sensory and information-processing systems are described, with special reference to hypotheses involving a use of the semicircular canals of the labyrinth as receptors for mechanical or electromagnetic guiding forces. Negative results were obtained in experiments with geomagnetic, inertial, and radio-wave guidance in pigeons. Preliminary attempts to eliminate bilaterally the sensors for vertical rotation in pigeons by ultrasound and high-energy proton irradiation suggest no adverse effect on initial orientation and homing success at distances less than 30 km; at greater distances no decisive results are yet available. A device for testing celestial navigation in small birds using a large prism on top of a Kramer cage is briefly described; and some data are given from orientation experiments with tortoises. (Author).
Author: Carl G. Edelstam
Publisher:
ISBN:
Category : Animal migration
Languages : en
Pages : 80
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Book Description
Some of the hypotheses put forward in recent years to account for vertebrate navigation ability are examined theoretically and by experiments. Methods of interfering with the suggested external stimuli and the suggested sensory and information-processing systems are described, with special reference to hypotheses involving a use of the semicircular canals of the labyrinth as receptors for mechanical or electromagnetic guiding forces. Negative results were obtained in experiments with geomagnetic, inertial, and radio-wave guidance in pigeons. Preliminary attempts to eliminate bilaterally the sensors for vertical rotation in pigeons by ultrasound and high-energy proton irradiation suggest no adverse effect on initial orientation and homing success at distances less than 30 km; at greater distances no decisive results are yet available. A device for testing celestial navigation in small birds using a large prism on top of a Kramer cage is briefly described; and some data are given from orientation experiments with tortoises. (Author).
Author: Carl G. EDELSTAM
Publisher:
ISBN:
Category :
Languages : en
Pages : 51
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Book Description
The physical and sensory basis of navigation in fish, turtles, birds, and bats has been examined theoretically and by experiment. The stars are found to be superior for several reasons to the sun as potential cues in visual navigation. The advantage of non-visual over visual navigation increases rapidly with increasing size of the sense organs, which may help to explain certain differences in homing behaviour between small and large animals. Methods are suggested to differentiate between navigation systems based on measurements of (a) the altitude of the stars, (b) the altitude of the sun, (c) the position of celestial radio sources, (d) the inertial forces experienced during the outward journey prior to homing, (e) the intensity of gravity, (f) the intensity and direction of the Coriolis force, and (g) the intensity and direction of the geomagnetic field. Some results of such tests and of other experiments are reported. (Author).
Author: David Barrie
Publisher: The Experiment
ISBN: 1615196692
Category : Science
Languages : en
Pages : 320
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Book Description
“Just astonishing . . . Our natural navigational capacities are no match for those of the supernavigators in this eye-opening book.”—Frans de Waal, The New York Times Book Review Publisher's note: Supernavigators was published in the UK under the title Incredible Journeys. Animals plainly know where they’re going, but how they know has remained a stubborn mystery—until now. Supernavigators is a globe-trotting voyage of discovery alongside astounding animals of every stripe: dung beetles that steer by the Milky Way, box jellyfish that can see above the water (with a few of their twenty-four eyes), sea turtles that sense Earth’s magnetic field, and many more. David Barrie consults animal behaviorists and Nobel Prize–winning scientists to catch us up on the cutting edge of animal intelligence—revealing these wonders in a whole new light.
Author: James L. Gould
Publisher: Princeton University Press
ISBN: 0691140456
Category : Nature
Languages : en
Pages : 310
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Book Description
Explores the methods by which animals navigate throughout the world, examining such examples as the monarch butterfly's use of an internal clock and the honey bee's reliance on the sun and mental maps.
Author: Carl Edelstam
Publisher:
ISBN:
Category : Animals
Languages : en
Pages : 14
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Book Description
A laboratory study of the basis of visual acuity in man suggests that vision may not be a limiting factor in astronavigation among vertebrates. Field observations of pigeons navigating without the aid of celestial clues show that the birds shake their heads sideways at intervals. This confirms a prediction made by Ising on the assumption that birds use their semicircular canals for estimating latitude and directions from Coriolis force differences. (Author).
Author: Andrii Rozhok
Publisher: Springer Science & Business Media
ISBN: 3540787194
Category : Science
Languages : en
Pages : 169
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Book Description
This book reviews all major models and hypotheses concerning the mechanisms supposed to underlie the process of navigation in vertebrates. It covers data on all major model groups of vertebrates studied in the context of animal navigation, such as migratory birds, homing pigeons, sea turtles, subterranean mammals and some migratory fish species. Some other – less studied – groups, e.g., whales, have also been touched. The first part of the book describes different sources of navigational information, with their specific navigational mechanisms known or supposed to be employed by animals for navigational goals. The second part discusses possible functions of these mechanisms in different vertebrates and in the context of different navigational tasks, ranging from short-range navigation, often performed by animals within as small an area as several square meters, to long-distance global-scale migrations performed by many birds and some sea turtles during their lifespan.
Author: Gauthreaux
Publisher: Elsevier
ISBN: 0080918336
Category : Technology & Engineering
Languages : en
Pages : 402
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Book Description
Animal Migration, Orientation, and Navigation presents the various aspects of animal migration, including the evolution of migration, climatic and meteorological influences, and bioenergetics. This book discusses the physiological control, sensory systems, orientation and navigation, and biological clocks and phenology aspects of animal migration. Organized into five chapters, this book begins with an overview of the migration strategies of animals in the context of a space continuum. This text then explains the influence of short- and long-term climatic cycles on the spectrum of migratory patterns in nature. Other chapters consider the energetic requirements of different migration strategies and the energy stores of the migrants. This book discusses as well the physiological basis of animal migration, with emphasis on endocrinal findings on the timing and energetic aspects of different migration strategies. The final chapter deals with the mechanisms used in direction finding by migrating animals. This book is a valuable resource for biologists and ecologists.
Author: Michael C. Appleby
Publisher: CABI
ISBN: 1845934032
Category : Technology & Engineering
Languages : en
Pages : 476
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Book Description
Around 60 billion animals are bred for food each year worldwide and more than a billion are transported, often over long distances, every week. However, awareness and understanding of animal welfare, the factors that affect it and the correlation between it and other issues such as food safety and quality are increasing. Long distance transport can cause both physical and mental problems in animals and promoting animal welfare will be beneficial to both the animals and the agricultural and processing industries. In conjunction with a global coalition of NGOs working on animal transport and welfare, this volume brings together studies from well known animal scientists and researchers to review the implications and necessity of long distance animal transport for slaughter. Authoritative reports on regional practices are combined with discussions of the science, economics, legislation and procedures involved in this practice. This review will be essential for researchers and professionals within animal production and welfare as well as veterinary science.
Author: Thomas Alerstam
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Hans G. Wallraff
Publisher: Springer Science & Business Media
ISBN: 9783540223856
Category : Psychology
Languages : en
Pages : 254
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Book Description
How migratory birds can navigate home from their wintering grounds to their breeding sites over hundreds and thousands of kilometres has been an admired mystery over more than a century. Profound advances towards a solution of this problem have been achieved with a model bird, the homing pigeon. This monograph summarizes our current knowledge about pigeon homing, about the birds' application of a sun compass and a magnetic compass, of a visual topographical map within a familiar area and -- most surprisingly -- of an olfactory map using atmospheric chemosignals as indicators of position in distant unfamiliar areas.
