By Peter B. Stacey (editor), Walter D. Koenig (editor)
Stacey and Koenig speak about the phenomenon of cooperative breeding between birds, an strange form of social habit universal to just a couple of hundred species all over the world, during which participants except the male-female pairs aid to elevate the younger of a unmarried nest or den. simply because sure members relief in elevating offspring which aren't their very own, cooperative breeding provides upward thrust to a few of the clearest examples of altruism between animals. This specific breeding habit is of curiosity to evolutionary biologists and behavioral ecologists on the grounds that such species convey probably the most strange and weird social habit saw wherever within the animal nation. The reports are all long-term and therefore the publication summarizes the most broad reports of the habit of marked participants ever undertaken. Graduate scholars and examine employees in ornithology, sociobiology, behavioral ecology and evolutionary biology will locate a lot of price during this ebook.
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Extra info for Cooperative Breeding in Birds: Long Term Studies of Ecology and Behaviour
C. R. (19836). Commentary on co-operative breeding strategies among birds. In Perspectives in Ornithology. Essays presented for the Centennial of the American Ornithologists' Union, ed. A. H. Brush and G. A. Clark, Jr, pp. 127-33. Cambridge University Press: Cambridge. Rowley, I. C. R. (1987). Conservation of the Purple-crowned wren Malurus coronatus in Northern Australia. Final Report on Project 47 to World Wildlife Fund (Australia). Rowley, I. C. R. and Brooker, M. G. (1987). The response of a small insectivorous bird to fire in heathlands.
Ligon females appeared to incubate in only one. ) These observations lead us to conclude that the alpha female, like the alpha male, is normally the sole breeder of its sex. Timing of breeding Breeding in each year normally begins in late May or early June, following the long rains' of March-June, and generally terminates in December or earlier. The number of successful nesting efforts per year appears to be controlled largely by food availability, and this, in turn, is determined largely by patterns of rainfall (Ligon and Ligon 1982).
For an experienced female with no helpers it takes a mean of 66 (± 9) days from the time when thefirstegg is laid until the brood reaches independence and the first egg of the next clutch is laid. 001). 001; this is discussed further by Russell and Rowley 1988). We suggest that in this case the helper contribution is to take over the feeding and shepherding of thefledglings,freeing the female to renest earlier than if she and the male alone were responsible for the fledglings. On several occasions the female has been found building her next nest within a fortnight of the previous brood fledgling, although those young would still require care for at least another month - care that was provided by the helpers.
Cooperative Breeding in Birds: Long Term Studies of Ecology and Behaviour by Peter B. Stacey (editor), Walter D. Koenig (editor)