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''This unique and invaluable booklet may also help to increase the certainty of avian ecology through the world.''
?-D. Flaspohler, Michigan Technical college, in selection (January 2002)
''This is a stimulating booklet and a wealthy resource of study principles written at a degree appropriate for undergraduates...''
?-Jeremy Lindsell in IBIS (2001)
''...an articulate easy evaluation of what presently is shaping the sector of avian behavioral ecology within the tropics. ...The authors are to be counseled for bringing jointly a knowledge base that i am hoping will motivate ornithologists so as to add to its destiny expansion.''
?John Kricher for THE WILSON BULLETIN (September 2001)
''The primary power of this ebook is the authors' breadth of expertise, which gives credibility to their claims. ...I suggest Behavioral Ecology of Tropical Birds to budding behavioral ecologists who're at the prowl for learn themes which could adjust the instructions of the sphere, and to ecologists within the temperate quarter who ask yourself why their colleagues visit the trouble and cost of mounting behavioral learn tasks within the tropics.''
?-Tom A. Langen, Clarkson college, in ECOLOGY (November 2001)
''...an articulate easy assessment of what presently is shaping the sector of avia behavioral ecology within the tropics. ...The authos are to be counseled for bringing jointly a data base that i'm hoping will encourage ornithologists so as to add to its destiny expansion.''
?John Kricher for THE WILSON BULLETIN (September 2001)
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Extra info for Behavioral Ecology of Tropical Birds
Testes size can be used as an indirect measure of the intensity of sperm competition, and correlates well with EPF BEHAVIORAL ECOLOGY OF TROPICAL BIRDS 40 frequency (Moller and Briskie 1995). 1). For instance, temperate zone Tree Swallows, Tachycineta bicolor, have abundant EPFs and testes ten times larger than their close relative in the tropics, the Mangrove Swallow, T. albilinea, in which EPFs are much less common (Moore et al. 1999). Similarly, even during the peak of the breeding season, tropical Spotted Antbird, Hylophylax naevioides, males have testes that are one tenth the size of most temperate zone passerines (Wikelski et al.
Third, nocturnal species also show an increase in clutch size with latitude even though night length (and foraging time) decrease with latitude. Any general hypothesis for clutch size in the tropics must account for these patterns. Skutch (1949) suggested that nest predation, not food limitation, was the main cost of having large broods. He observed that nest predation is remarkably high in the tropics, and suggested that large broods would suffer high predation owing to the increased parental activity at the nest.
Sex role divergence is typical of temperate zone passerines, where males sing and defend territories, compete for EPFs, and their parental care is generally limited to nest defense and feeding young. Females, of course, do not usually sing or defend territories as aggressively as males do and they build nests and incubate the eggs alone. Extra-pair behavior creates strongly divergent sex roles as males compete for EPFs, females are discerning in their acceptance of extra-pair mates, and males and females have an unequal genetic stake in the brood they raise together.