Animal Population Dynamics.

Douglas H. Johnson; James W. Grier; R. Moss; A. Watson; J. Ollason

doi:10.2307/2531356

Some Studies of the Influences of Prehistoric Human Predation on Marine Animal Population Dynamics

Maritime Adaptations of the Pacific ◽

10.1515/9783110879902.39 ◽

2012 ◽

Cited By ~ 1

Author(s):

WILFRED SHAWCROSS

Keyword(s):

Population Dynamics ◽

Marine Animal ◽

Animal Population ◽

Human Predation

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Hidden Process Models For Animal Population Dynamics

Ecological Applications ◽

10.1890/04-0592 ◽

2006 ◽

Vol 16 (1) ◽

pp. 74-86 ◽

Cited By ~ 98

Author(s):

K. B. Newman ◽

S. T. Buckland ◽

S. T. Lindley ◽

L. Thomas ◽

C. Fernández

Keyword(s):

Population Dynamics ◽

Process Models ◽

Animal Population

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An addition to Krebs' restatement of the Chitty Hypothesis from an entomological perspective

Canadian Journal of Zoology ◽

10.1139/z82-115 ◽

1982 ◽

Vol 60 (5) ◽

pp. 833-837

Author(s):

J. A. Garland

Keyword(s):

Population Dynamics ◽

Schistocerca Gregaria ◽

Locusta Migratoria ◽

Self Regulation ◽

Test Case ◽

Animal Population ◽

Present Evidence ◽

Zeiraphera Diniana ◽

The Moment ◽

Larch Bud Moth

The insect examples which Krebs used to illustrate the Chitty Hypothesis of self-regulation in animal population dynamics are updated. For the larch bud moth, Zeiraphera diniana, regulation still is best explained by environmental factors. With the several species of plague locusts, including Locusta migratoria, L. pardalina, and Schistocerca gregaria, locustol and two potential pheromones combine to produce an apparent perpetual state of gregarisation. On present evidence, self-regulation by means of microevolution does not appear to be involved in the action of locust chemical releasing stimuli; so that, for the moment, neither entomological test case can be said to support the Chitty Hypothesis.

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Isolation and adaptation in populations of the Lepidoptera

Proceedings of the Royal Society of London Series B Biological Sciences ◽

10.1098/rspb.1956.0043 ◽

1956 ◽

Vol 145 (920) ◽

pp. 322-329

Keyword(s):

Population Dynamics ◽

Natural Selection ◽

Animal Population ◽

Large Numbers ◽

Maniola Jurtina ◽

Representative Samples

The effective study of the influence of isolation on an animal population necessitates the choice of a species which is not only abundant and easy to recognize, but which is readily contained by barriers of reasonably small dimensions. The satyrine butterfly, Maniola jurtina , has proved to be ideal material for this kind of work in the Isles of Scilly and elsewhere. Its large numbers, coupled with a reluctance to cross certain types of obstacles, sometimes little more than a hundred yards in extent, have led to the formation of many distinct populations. These provide ideal material for investigating adaptation and the action of natural selection. During our studies of population dynamics in Maniola jurtina on the small uninhabited island of Tean, Isles of Scilly, in 1946 (see figure 1), E. B. Ford and I noticed that the number of spots on the underside of the hind wings of the butterfly appeared to vary in both sexes, ranging from 0 to 6 on each wing. The capture of representative samples confirmed our opinion that the spot distribution was characteristic for each sex, being unimodal in the male and bimodal in the female. Moreover, this condition appeared to be a constant one, the distribution of spots, whatever its selective value may be, having become stabilized in the population by the action of natural selection (Dowdeswell, Fisher & Ford 1949; Dowdeswell & Ford 1952, 1953, 1955; Dowdeswell, Ford & McWhirter 1956).

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