Download PDF by F. S. Bodenheimer (auth.): Animal Ecology To-Day

By F. S. Bodenheimer (auth.)

ISBN-10: 940175845X

ISBN-13: 9789401758451

ISBN-10: 9401763100

ISBN-13: 9789401763103

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I Incubation is also important in May, which seems, however, not to be a critical period with regard to the physical environment. June again, with hatching and rearing of the young, is critical. The paired temperature and rainfall appear important. 5 o C and 64 to 117 mm rain. A first tentative analysis of the Pronghorn Antelope (Antelope cervicapra) in the Yellowstone Park 25 , where the peak of mating falls in October, puts the sensitive period of gonad development and reproductive stimulation in September (as in the Cottontail Rabbit).

Ge stratification) ; C. actual population growth of Paramaecium; F and G: ideal population growth and age-stratification at saturation ( = stability) in honey-bees. the age-structure shows the same changes from pyramid over bell to urn in different growth-stages, as will be shown later in the chapter on Drosophila. M onog r . Bioi. 5 5 16 32 64 128 256 512 1,024 2,048 4,096 8,192 16,384 32,768 10 15 20 25 30 35 40 45 50 50 50 Mammals, birds, and other long-lived animals show a somewhat different type of population growth.

1 2 2 2 .. 6 80 1 2 .. 0 60 58 xi 3 1/3 .. 8 72 69 38 1 ix 3 0 .. 2 0 2 1/3 1 1/3 .. 1 .. 1 .. viii 1 .. vii 1 .. 1 1 1 1 -1 1 1/3 .. 2 67 96 .. 9 70 131 ii Table VIII. Complete Ceratitis-bonitatio n of an Orange Grove in the Neighbourhood of Tel Aviv in 1932 and 1934 § 61 In Tel Aviv climatic conditions are favourable to optimal all the year round. In 1932 they were favourable, except for December. The rain-factor is only slightly unfavourable in January. No extreme drought decimates the adult fly population seriously.

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Animal Ecology To-Day by F. S. Bodenheimer (auth.)


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