By Charles R. Brown, Mary Bomberger Brown (auth.), Val Nolan Jr., Charles F. Thompson (eds.)
Current Ornithology publishes authoritative, updated, scholarly reports of issues chosen from the total variety of present learn in avian biology. subject matters disguise the spectrum from the molecular point of association to inhabitants biology and neighborhood ecology. The sequence seeks in particular to study 1) fields within which ample fresh literature will reap the benefits of synthesis and association, 2) newly rising fields which are gaining acceptance because the results of contemporary discoveries or shifts in viewpoint, and three) fields within which scholars of vertebrates may gain advantage from comparisons of birds with different periods. All chapters are invited, and authors are selected for his or her management within the matters below review.
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Extra resources for Current Ornithology
Sample text
Manipulating colony size after birds have settled may be the only way to distinguish between these possibilities. 3. Mixing of Mobile Offspring In most colonial birds, nesting is relatively synchronous, and a consequence is that multiple young from different nests become mobile or they fledge simultaneously. With nests often in close physical proximity to each other, offspring of similar age from different parents have frequent opportunities to mix either in brood assembly areas or at the nest itself.
Cliff Swallows also use local enhancement on their foraging grounds and converge on birds that have located insects (Brown, 1988).
In a study of Eared Grebes (Podiceps nigricollis), the largest colony with the highest nest density had 68% of nests parasitized by conspecifics, compared with 14% and 38% in two smaller colonies (Lyon and Everding, 1996). , 1997). However, Hoogland and Sherman (1976) found no effect of colony size on rates of brood parasitism in Bank Swallows, and Rohwer and Freeman's (1989) comparative analysis found no strong association between coloniality and intraspecific brood parasitism for the species for which they had information.