Body size evolution in Mesozoic birds
نویسندگان
چکیده
منابع مشابه
SHORT COMMUNICATION Body size evolution in Mesozoic birds
The constraint of body size is much more important for flying birds than it is for most other vertebrates, because of the biomechanical limits imposed by powered, flapping flight (Alexander, 1998). We know that the maximum body size of a flying organism is significantly below that for terrestrial or aquatic taxa (Alexander, 1998), and that the requirements of flight have acted to limit or contr...
متن کاملRates of dinosaur limb evolution provide evidence for exceptional radiation in Mesozoic birds.
Birds are the most diverse living tetrapod group and are a model of large-scale adaptive radiation. Neontological studies suggest a radiation within the avian crown group, long after the origin of flight. However, deep time patterns of bird evolution remain obscure because only limited fossil data have been considered. We analyse cladogenesis and limb evolution on the entire tree of Mesozoic th...
متن کاملThe Completeness of the Fossil Record of Mesozoic Birds: Implications for Early Avian Evolution
Many palaeobiological analyses have concluded that modern birds (Neornithes) radiated no earlier than the Maastrichtian, whereas molecular clock studies have argued for a much earlier origination. Here, we assess the quality of the fossil record of Mesozoic avian species, using a recently proposed character completeness metric which calculates the percentage of phylogenetic characters that can ...
متن کاملCorrelated evolution of host and parasite body size: tests of Harrison's rule using birds and lice.
Large-bodied species of hosts often harbor large-bodied parasites, a pattern known as Harrison's rule. Harrison's rule has been documented for a variety of animal parasites and herbivorous insects, yet the adaptive basis of the body-size correlation is poorly understood. We used phylogenetically independent methods to test for Harrison's rule across a large assemblage of bird lice (Insecta: Pht...
متن کاملShort Communications Body Size and Longevity in Birds
The concept of physiological time was introduced by Hill ( 1951)). He reasoned that as metabolic rate and longevity change with body size, time itself may be scaled. Hence, spans such as growth to maturity, gestation period and the time required for digestion transpire on a time scale dependent upon the body size of an animal. Since Hill’ s hypothesis, many of these rate variables have been exa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Evolutionary Biology
سال: 2008
ISSN: 1010-061X,1420-9101
DOI: 10.1111/j.1420-9101.2007.01483.x