Download e-book for kindle: Animal Migration, Orientation and Navigation by Sidney A. Gauthreaux

By Sidney A. Gauthreaux

ISBN-10: 0122777506

ISBN-13: 9780122777509

Animal Migration, Orientation, and Navigation offers a number of the points of animal migration, together with the evolution of migration, climatic and meteorological impacts, and bioenergetics. This publication discusses the physiological regulate, sensory structures, orientation and navigation, and organic clocks and phenology elements of animal migration.

Organized into 5 chapters, this booklet starts with an summary of the migration suggestions of animals within the context of an area continuum. this article then explains the impact of brief- and long term climatic cycles at the spectrum of migratory styles in nature. different chapters give some thought to the vigorous necessities of alternative migration suggestions and the strength shops of the migrants. This ebook discusses besides the physiological foundation of animal migration, with emphasis on endocrinal findings at the timing and vigorous elements of alternative migration ideas. the ultimate bankruptcy offers with the mechanisms utilized in path discovering via migrating animals.

This booklet is a beneficial source for biologists and ecologists.

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Esox may also exploit migrating Catostomus. In Texas the Mexican tetra Astyanax mexicanus has apparently extended its range northward by evolv- 40 Hugh Dingle ing seasonal migration to exploit the warmest sections of streams (Edwards, 1977). Small streams such as those studied by Karr and Gorman and Ed­ wards are logical sites for comparative studies of the adaptiveness and coevolution of migratory and reproductive behaviors, but unfortunately such considerations are rare in the fish literature (cf.

These have lower fecundity and are smaller than emigrants, apparently adaptations to col­ onizing harsher environments of drying grass. In the autumn these produce less fecund alate gynoparae and males which return to bird cherry. The gynoparae produce small apterous oviparae which mate with the males to produce overwintering eggs. After return to bird cherry, there is only a short time before winter and oviparae must be produced quickly. The small size and low numbers of oviparae are apparently adaptations for rapid development and early reproduction.

Finally, an interesting case of alary polymorphism occurs in the Euro­ pean bug Pyrrhocoris apterus (Honek, 1976a,b). The frequency of mac­ ropters in populations in Central and Southeastern Europe was never more than 2 3 % with no geographic trends observed. Long-day photoperiods in­ crease the proportion of macropters, and selection for macroptery increases the frequency to around 75 % in seven generations suggesting high additive genetic variance (Falconer, 1960; Dingle, 1974). What is curious about P.

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Animal Migration, Orientation and Navigation by Sidney A. Gauthreaux


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