Download e-book for iPad: Animal Ecology To-Day by F. S. Bodenheimer (auth.)

By F. S. Bodenheimer (auth.)

ISBN-10: 940175845X

ISBN-13: 9789401758451

ISBN-10: 9401763100

ISBN-13: 9789401763103

Show description

Read or Download Animal Ecology To-Day PDF

Best nature & ecology books

Get 100 Reasons to Be Glad PDF

Sea-horses. .. Bach wrote a few cello suites. .. The moon seems to be almost like the 1st time we observed it. .. Giraffes. .. Dentists offer you injections sooner than they begin to drill. .. Re-incarnation will be actual. .. somebody figured out the potato was once fit for human consumption. .. Cats decide to stay with humans. .. seashore huts.

Download e-book for kindle: When we say we're home: a quartet of place and memory by Dawn Marano, Douglas Carlson, Wendy Bishop, W. Scott Olsen,

Might be not anything is extra complex than a decent solution to an easy query: "Where do you reside? " so much folks reply with our postal deal with, yet we all know that the place we consider a feeling of domestic is not inevitably the place we decide up the mail. We supply our handle to explain our urban or local, yet we all know that the more true resolution will be a miles longer tale: the tale of the place we are living now and of all of the locations we have now lived and visited - the tale of the place we "dwell.

Read e-book online Coastal-Offshore Ecosystem Interactions PDF

In regards to the ProductPublished via the yank Geophysical Union as a part of the Lecture Notes on Coastal and Estuarine experiences sequence. Jansson, B. -O. (ed. ). Coastal-offshore surroundings interplay. Lecture Notes on Coastal and Estuarine stories. Springer Verlag 22: Interactions among coastal and offshore ecosystems are thought of, targeting 4 elements.

Additional resources for Animal Ecology To-Day

Example text

Its more important columns are: l = survivorship at a certain age; d = death cases occurring at each age-class; q = death-rate at a given age-class, provided the entire population is composed of this age-class ; e = average lifeexpectance of an individual after having reached a given age. The normal and usual conception of longevity is that called here ecological longevity. 4. Age-Distribution in Animal Populations A greatly neglected study in animal ecology is that of age-structure of populations.

The few survivors participate in the formation of the normal first generation. The generation IA is therefore also of little importance in the maintenance of the species. The brothers of those parents which did not oviposit in October hibernate. They are active, with interruptions, during the winter, especially on sunny days, and even oviposit occasionally. From the eggs of the hiberating second generation, the first generation develops in March. V/e thus observe two annual generations in the coastal plain in spring and autumn which develop more or less sterile sidelines, one each in summer and winter.

14 Approximate % of conjugants induced .. 2 The exponential growth is soon broken and changed into the general curve of organism growth, the logistic curve. , and inhibition of reproduction - in this case division. e. conjugation. In our Paramaecium culture the latter factor alone worked. The following scheme may illustrate how destruction, as well as inhibition, induced up to a certain degree and increasing up to a certain point parallel to growing population density, will change the exponential into a logistic growth (Fig.

Download PDF sample

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


by David
4.0

Rated 4.02 of 5 – based on 18 votes