Buscar
Mostrando ítems 21-30 de 276
Enhancing Avifauna in Commercial Plantations
(2010)
The occurrence of fauna in commercial plantations is often associated with structural complexity.
Through ameta-analysis, we tested whether the structural complexity of plantations could enhance bird species
assemblages ...
Selective extinction of late Neogene bivalves on the temperate Pacific coast of South America
(PALEONTOLOGICAL SOC INC, 2007)
We assessed selective extinction patterns in bivalves during a late Neogene mass extinction event observed along the temperate Pacific coast of South America. The analysis of 99 late Neogene and Quaternary fossil sites ...
Allantoin excretion in the rat
(1973)
When nucleic acids are catabolized by the rat, most of the purine moiety is excreted in the urine as allantoin. The amount excreted has been found to be higher under physiological conditions associated with increased protein ...
Evolution of the third eye: a phylogenetic comparative study of parietal-eye size as an ecophysiological adaptation in Liolaemus lizards
(WILEY-BLACKWELL, 2010-12)
The parietal, or third, eye is a photosensory organ situated in the middle of the skull of many lizards. Despite many
hypotheses, its exact ecological functions are still unclear. Studies have compared the presence and ...
Thorson's rule, life-history evolution, and diversification of benthic octopuses (Cephalopoda: Octopodoidea)
(Society for the Study of Evolution, 2018)
Here, we evaluate the so-called Thorson’s rule, which posits that direct-development and larger eggs are favored toward the poles in marine organisms and whose validity been the subject of considerable debate in the ...
Is natural selection promoting sexual dimorphism in the Green-backed Firecrown Hummingbird (Sephanoides Sephaniodes)?
(2009)
In many hummingbird species there is an opposite pattern of sexual dimorphism in bill length and other morphometric measures of body size. These differences seem to be closely related with differences in foraging ecology ...
The evolution of the platyrrhine talus: a comparative analysis of the phenetic affinities of the Miocene platyrrhines with their modern relatives
(Elsevier, 2017)
Platyrrhines are a diverse group of primates that presently occupy a broad range of tropical-equatorial environments in the Americas. However, most of the fossil platyrrhine species of the early Miocene have been found at ...
A giant soft-shelled egg from the Late Cretaceous of Antarctica
(Nature, 2020)
Egg size and structure reflect important constraints on the reproductive and life-history characteristics of vertebrates(1). More than two-thirds of all extant amniotes lay eggs(2). During the Mesozoic era (around 250 ...
The relationship of telomere length to baseline corticosterone levels in nestlings of an altricial passerine bird in natural populations
(Biomed Central, 2016)
Background: Environmental stressors increase the secretion of glucocorticoids that in turn can shorten telomeres via oxidative damage. Modification of telomere length, as a result of adversity faced early in life, can ...
Perinatal androgen exposure and adipose tissue programming: Is there an impact on body weight fate?
(Taylor and Francis Ltd, 2015)
© 2015 Informa UK, Ltd. Obesity is a major concern in public health because it is one of the main risk factors for the development of non-transmissible chronic diseases. The fact that there is a clear sex dimorphism in ...