Read e-book online Among the Islands PDF

By Tim Flannery

ISBN-10: 1443413569

ISBN-13: 9781443413565

Twenty-five years in the past, a tender Australian museum curator named Tim Flannery got down to examine the fauna of the Pacific Islands. beginning with a survey of 1 of the main inaccessible islands in Melanesia, the younger scientist chanced on himself ghost whispering, snake wrestling and Quadoi looking looking for a small bat that grew to become out to not be earthshatteringly interesting.

With debts of getting to know, naming and occasionally consuming new mammal species; being thwarted or aided by way of neighborhood customs; and old medical expeditions, Flannery, now one of many world’s best environmentalists, takes us on a charming trip via essentially the most diversified and fabulous areas in the world.

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2004; McGraw, 2005). , 2005, 2007; McGraw, 2005; Isaksson and Andersson, 2008). , 2005). However, a comparative study has taken this one step further by demonstrating a link between egg-based maternal effects and the expression of carotenoid-based sexual signals. Biard et al. (2009) hypothesized that because maternally derived carotenoids can increase the efficiency of carotenoid metabolism post-hatching, egg-yolk carotenoids may be advantageous to offspring in allocating resources to carotenoid-based sexual signals.

In (a) and (b) demand > supply; in (c) and (d) demand ≈ supply; in (e)–(g) demand ≫ supply. The width of the base represents the total amount of resources acquired. Allocations to growth are donated by the vertical arrows and to maintenance by horizontal arrows, with the width of the arrow in both cases indicating the relative amount of resources allocated to each function. 3). , a is a better strategy than b). , sexual signals). In addition, it is expected that selection will act against allocating extra resources to growth under conditions of relaxed competition, as the costs of oxidative stress will not be offset by any gains in resource acquisition ability.

Journal of Experimental Biology, 209, 4414–4419. P. (2005) Effects of carotenoid availability during laying on reproduction in the blue tit. Oecologia, 144, 32–44. P. (2007) An analysis of pre- and post-hatching maternal effects mediated by antioxidants in the blue tit. Journal of Experimental Biology, 20, 326–339. P. (2009) Maternal effects mediated by antioxidants and the evolution of carotenoid-based signals in birds. American Naturalist, 174, 696–708. J. (1999) Nestling diet, secondary sexual traits and fitness in the zebra finch.

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Among the Islands by Tim Flannery

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