Download or read book Siblicide the Mechanism of Brood Reduction in the Black legged Kittiwake Rissa Tridactyla written by Barbara Moss Braun and published by . This book was released on 1981 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Siblicide the Mechanism of Brood Reduction in the Black legged Kitiwake Rissa Tridactyla written by Barbara Moss Braun and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Assessment of the Alaskan Continental Shelf written by and published by . This book was released on with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wildlife Review written by and published by . This book was released on 1990 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Eastern Bering Sea Shelf written by Donald Wilbur Hood and published by . This book was released on 1981 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On Sex ratio and Sibling Competition written by Thomas Merkling and published by . This book was released on 2013 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: During a breeding event, parents face several decisions that may impact their fitness. In this thesis, I have been interested in sex-ratio and sibling competition patterns in the black-legged kittiwake (Rissa tridactyla). First, I showed that parents in poorer condition overproduced daughters, which seems to be due to their lower reproductive cost and, possibly, to their higher fitness return for parents as compared to sons. Then, my results suggested that the natural magnitude of hatching asynchrony minimised the costs for parents and younger siblings, while older siblings seemed to be stressed by their dominant position. Finally, mothers favoured their younger chick's competitiveness only when in conflict over brood reduction with their older chick. This thesis thus highlighted some means through which parents could maximise benefits or reduce costs associated with their reproduction.
Download or read book Bulletin written by Pacific Seabird Group and published by . This book was released on 1979 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Condor written by and published by . This book was released on 1993 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography and Literature Database written by and published by . This book was released on 1989 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The evolution of brood reduction by siblicide in birds written by H C J. Godfray and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sibling Rivalry in Black legged Kittiwakes Rissa Tridactyla written by Adriana Vallarino Moncada and published by . This book was released on 2008 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chicks of several species compete with their siblings for parental provisioning of resources and care. This competition is mainly manifested by begging or food hoarding and in only few species, as in the black-legged kittiwake (Rissa tridactyla) direct aggression between the offspring is present. It has been proposed that the degree of asymmetries between the members of a brood influence the severity and outcome of this conflict. Several inequalities between the offspring have been identified (e.g. age, size, egg quality). First- hatched chicks (A) are older, larger and hatch from a different quality egg and size than second- hatched chicks (B). These inequalities provide different advantages to the chicks within a brood but their influence in sibling rivalry have not been widely tested. In the present thesis egg components of A and B eggs were analysed, comparisons of behaviour, survival and growth of chicks in two different years were made and egg size and quality were experimentally manipulated in order to test their importance in the sibling rivarly outcome of the black-legged kittiwake. In chapter II egg composition analyses of A- and B- eggs within a clutch were made. It was found that mothers allocated more carotenoids and less testosterone to A- eggs, while corticosterone, lipid and protein content did not differ, although A- eggs were 4% larger than B- eggs. In chapter III comparisons of behaviour, growth and survival between two environmentally different years were made. 2004 was a year with poor quality food whilst 2005 was a year with good food quality. The majority of second-hatched chicks in 2004 died before reaching 10 days of age and were all dead before 15 days while in 2005, more than 80% of second-hatched chicks fledged. Same behaviours were performed by A and B chicks in both years but the behavioural patterns did: aggression increased with age in 2004 while begging and feeding decreased in A and B chicks; these behaviours did not change with age in 2005. In chapter IV the influence of egg size on sibling rivalry was experimentally tested by eliminating age and egg quality differences within a brood and manipulating only the egg size differences. Comparisons of survival, growth and behaviour were made between experimental and control broods in which all the natural asymmetries were present. Differences in egg size determined which chick became dominant but these differences did not change the brood behaviour. Furthermore, experimental broods showed very different behaviour from control broods and the frequency of aggression was different between experimental broods formed by A- or B- eggs. In order to test if eggs are adapted for their hatching position, in chapter V an experimental manipulation of the brood composition was carried out and one of the clutch eggs' was swapped to make it hatch in a different position from the one it was made to hatch. The natural asymmetries in age and egg size were maintained. Broods with two first-laid eggs were less aggressive than control broods and than broods with two second-laid eggs. If A- and B- chicks are specifically made for their hatching position, their stress response should differ when they were artificially made to hatch on the same position and exposed to a stressor. This was tested on chapter VI and it was found that second hatched chicks from A- and B eggs did not differ on their stress response when facing a handling-stress protocol. On each year, natural broods fledged in higher proportion than experimental ones, which indicates that asymmetries within a brood are adaptive. It seems that eliminating within brood asymmetries is costly for the parents and perhaps these differences are optimal for maintaining a high efficiency index for the parents in terms of the amount of investment and the number of fledged chicks. Thus apparently, the main asymmetry influencing sibling rivalry is the difference in age of the offspring caused by hatching asynchronously.
Download or read book Black legged Kittiwake written by Pat Herron Baird and published by . This book was released on 1994 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Ornithology Volume 17 written by Charles F. Thompson and published by Springer Science & Business Media. This book was released on 2010-09-09 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Ornithology publishes authoritative, up-to-date, scholarly reviews of topics selected from the full range of current research in avian biology. Topics cover the spectrum from the molecular level of organization to population biology and community ecology. The series seeks especially to review (1) fields in which an abundant recent literature will benefit from synthesis and organization, or (2) newly emerging fields that are gaining recognition as the result of recent discoveries or shifts in perspective, or (3) fields in which students of vertebrates may benefit from comparisons of birds with other classes. All chapters are invited, and authors are chosen for their leadership in the subjects under review.
Download or read book The Kittiwake written by John Coulson and published by A&C Black. This book was released on 2011-09-19 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: An authoritative overview of the biology of the Kittiwake, Rissa tridactyla. Returning to its breeding sites in the spring after a winter spent far out at sea, the Kittiwake is a familiar sight around the coasts of Britain and Europe. A pale, medium-sized gull with a 'gentle' expression and bright yellow bill, the Kittiwake has been the subject of behavioural research since the late 1950s - one of the longest running studies in the world. In this Poyser Monograph, John Coulson summarises these decades of research, revealing amazing insights into the life of these gulls, with wider implications for the behavioural ecology of all colonial birds. There are sections on life at sea, nest-site selection, breeding biology, feeding ecology, colony dynamics, moult, survivorship and conservation. This book is essential for academics working on colonial species, and is also of great interest to birders who want to learn more about these elegant cliff-dwelling birds.
Download or read book Stress Physiology in Animals written by Paul H. M. Balm and published by Wiley-Blackwell. This book was released on 1999 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of the impact of stress on animal physiology, organised by functional activity. Comparative aspects of the subject are emphasised throughout. The authors concentrate on the recent literature and the volume covers a range of organisation, from molecular to community.
Download or read book The Evolution of Sibling Rivalry written by Douglas W. Mock and published by . This book was released on 1997 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the main tenets of evolutionary biology is that organisms behave so as to maximize the number of their genes that will be passed on to future generations. Parents often produce more offspring than they can rear in case special opportunities or calamities occur. This frequently leads to deprivations and even death of some offspring. This book is about the evolutionary diversity, importance, and consequences of such squeezes. The authors, experts in their field, review the theory, field experiments, and natural history of sibling rivalry across a broad sweep of organisms, in a clear and accessible style that should appeal to both academics and natural historians.
Download or read book The Oxford Handbook of Evolutionary Family Psychology written by Catherine Salmon and published by Oxford University Press. This book was released on 2011-05-27 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Oxford Handbook of Evolutionary Family Psychology focuses on the psychology behind people's familial behavior, an understanding of which can illuminate our understanding of modern, ancient, and animal families.
