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A communal catalogue reveals Earth’s multiscale microbial diversity
TLDR
A meta-analysis of microbial community samples collected by hundreds of researchers for the Earth Microbiome Project is presented, creating both a reference database giving global context to DNA sequence data and a framework for incorporating data from future studies, fostering increasingly complete characterization of Earth’s microbial diversity.
Experimental evidence that egg color indicates female condition at laying in a songbird
The signaling hypothesis of eggshell coloration in birds is based on the assumption that females of species with blue-green eggs signal their phenotypic quality to their mates through deposition of
Trade-off between immunocompetence and growth in magpies: an experimental study
TLDR
Surprisingly, it is found that control and experimental nestlings fledged with similar body mass, size and condition, but experimental Nestlings suffered less from blood parasites and had fewer lymphocytes than control nestlings, suggesting a negative effect of blood parasites or other pathogens on nestling growth.
Nest building, sexual selection and parental investment
TLDR
The ‘good parent’ process is tested in a scenario where nest size is a sexually selected trait and it is predicted that individuals with more extreme displays (larger nests) might obtain benefits in terms of either parental investment or differential parental investment by the partner.
Characterization of Antimicrobial Substances Produced by Enterococcus faecalis MRR 10-3, Isolated from the Uropygial Gland of the Hoopoe (Upupa epops)
TLDR
This is the first time that the production of bacteriocins by a bacterium isolated from the uropygial gland has been described and may be important to the hygiene of the nest and thus to the health of the eggs and chicks.
Sexually Selected Egg Coloration in Spotless Starlings
TLDR
A negative relationship between the effect of experimental food supply on nestling immunocompetence and the intensity of blue‐green coloration of eggs is found, suggesting that egg color predicts nutritional conditions that nestlings will experience during development.
Nest building is a sexually selected behaviour in the barn swallow
TLDR
The hypothesis that nest building is a sexually selected trait is tested and it is predicted that females paired with males of high parental quality may obtain a mate providing large amounts of parental investment, while, as has been shown previously, females mated to attractive males will acquire mates with good genetic quality.
Antimicrobial chemicals in hoopoe preen secretions are produced by symbiotic bacteria
TLDR
Support is found for the hypothesized role of bacteria in the production of such antimicrobial chemicals in hoopoe preen secretions because experimental clearance of bacteria from glands of nestlings with antibiotics resulted in secretions without most of the volatiles detected in control individuals.
Does the great spotted cuckoo choose magpie hosts according to their parenting ability?
TLDR
The probability of survival of the parasite chicks increased if cuckoo eggs were laid in the nests of high-quality hosts originally chosen by the parasite.
Seasonal, sexual and developmental differences in hoopoe Upupa epops preen gland morphology and secretions: evidence for a role of bacteria
TLDR
The results suggest that some of the special properties of hoopoe glands are mediated by the presence of symbiotic bacteria.
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