Results 11 to 20 of about 38,928 (270)
Effect of sex on the gut microbiota characteristics of passerine migratory birds
Frontiers in Microbiology, 2022 The gut microbiota, considered the “invisible organ” in the host animal, has been extensively studied recently. However, knowledge about the gut microbiota characteristics of passerine migratory birds during migration is limited.
Rongfei Yan +5 more
doaj +1 more source
Brazilian Journal of Poultry Science, 2010 The mortality of passerines native of Southern Minas Gerais, Brazil, in August 2006 and the examination of sentinel free-range chicken eggs in August 2007 in an area surrounding a car battery lead smelter plant is described.
NRS Martins +6 more
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Eggshell pigment composition covaries with phylogeny but not with life history or with nesting ecology traits of British passerines [PDF]
, 2015 No single hypothesis is likely to explain the diversity in eggshell coloration and patterning across birds, suggesting that eggshell appearance is most likely to have evolved to fulfill many nonexclusive functions.
Brulez, Kaat +9 more
core +7 more sources
Body size changes in passerine birds introduced to New Zealand from the UK [PDF]
, 2013 One feature of global geographic variation in avian body sizes is that they are larger on isolated islands than on continental regions. Therefore, this study aims to assess whether there have been changes in body size following successful establishment ...
Blackburn, Tim M. +4 more
core +2 more sources
Avian energetics: The passerine/non-passerine dichotomy
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2016 Whether passerines collectively have a higher mean mass-independent basal rate of metabolism than the mean of other birds has been controversial. The conclusion that no difference exists was based on phylogenetic analyses. Higher basal rates, however, have been repeatedly seen in passerines and demonstrated by ANCOVA analyses. Several studies indicated
Brian K., McNab, McNab, Brian K.
openaire +3 more sources
Sperm design and variation in the New World blackbirds (Icteridae) [PDF]
, 2009 Post-copulatory sexual selection (PCSS) is thought to be one of the evolutionary forces responsible for the rapid and divergent evolution of sperm design. However, whereas in some taxa particular sperm traits are positively associated with PCSS, in other
AF Malo +81 more
core +2 more sources
Frontiers in Ecology and Evolution, 2019 Many young birds die soon after fledging, as they lack the skills to find food and avoid predation. Post-fledging parental care is assumed to assist acquisition of these vital skills. However, we still lack empirical examples examining the length of time
Victoria R. Franks +8 more
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Reproductive success of the wood warbler Phylloscopus sibilatrix varies across Europe
Journal of Avian Biology, 2022 Differences in population trends across a species' breeding range are ultimately linked to variation in demographic rates. In small songbirds, demographic rates related to fecundity typically have strong effects on population trends.
Nino Maag +18 more
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Plasma metabolites reflect seasonally changing metabolic processes in a long-distance migrant shorebird (Calidris canutus) [PDF]
, 2002 Migrant birds have tightly scheduled annual cycles consisting of several distinct life cycle (sub-)stages such as reproduction, migration, moult and overwintering, each of which have specific metabolic requirements (e.g., fattening during migration ...
Jenni, Lukas, +2 more
core +2 more sources
Mitochondrial DNA. Part B. Resources, 2019 The Alpine Leaf-warbler (Phylloscopus occisinensis) is a small-sized and poorly-known songbird endemic to China. In this study, we sequenced and described the whole mitochondrial genome of the Alpine leaf-warbler.
Zhenhao Liu +5 more
doaj +1 more source