Piotr G. Jabłoński
Pracownia Ekologii Behawioralnej
Oryginalne prace naukowe
Afiliacja MiIZ PAN
Effect of incubation on bacterial communities of eggshells in a temperate bird, the Eurasian Magpie (Pica pica).
Lee W.Y., Kim M., Jabłoński P.G., Choe J.C., Lee S.-I.
PLoS ONE, 9(8): e103959.
Bacteria, Bacterial pathogens, Bacillus, Birds, Polymerase chain reaction, Community structure, Ribosomal RNA, Feathers
Inhibitory effect of incubation on microbial growth has extensively been studied in wild bird populations using culture-based methods and conflicting results exist on whether incubation selectively affects the growth of microbes on the egg surface. In this study, we employed culture-independent methods, quantitative PCR and 16S rRNA gene pyrosequencing, to elucidate the effect of incubation on the bacterial abundance and bacterial community composition on the eggshells of the Eurasian Magpie (Pica pica). We found that total bacterial abundance increased and diversity decreased on incubated eggs while there were no changes on non-incubated eggs. Interestingly, Gram-positive Bacillus, which include mostly harmless species, became dominant and genus Pseudomonas, which include opportunistic avian egg pathogens, were significantly reduced after incubation. These results suggest that avian incubation in temperate regions may promote the growth of harmless (or benevolent) bacteria and suppress the growth of pathogenic bacterial taxa and consequently reduce the diversity of microbes on the egg surface. We hypothesize that this may occur due to difference in sensitivity to dehydration on the egg surface among microbes, combined with the introduction of Bacillus from bird feathers and due to the presence of antibiotics that certain bacteria produce.
Afiliacja MiIZ PAN
Moths use multisensory information to adopt adaptive resting orientations.
Kang C. K., Moon J.-Y., Lee S.-I., Jabłoński P.G.
Biological Journal of the Linnean Society , 111: 900–904.
anti-predator – behaviour – camouflage – crypsis – cues – organs.
Camouflage conceals animals from predators and depends on the interplay between the morphology and behaviour
of animals. Behavioural elements of animals, such as the choice of a resting spot or posture, are important for
effective camouflage, as well as the animals’ cryptic appearance. To date, the type of sensory input that mediates
resting site choice remains poorly understood. Previously, we showed that bark-like moths perceive and rely on
bark structure to seek out cryptic resting positions and body orientations on tree trunks. In the present study, we
investigated the sensory organs through which moths perceive the structure of bark when positioning their bodies
in adaptive resting orientations. We amputated (or blocked) each one of the hypothetical sensory organs in moths
(antennae, forelegs, wings, and eyes) and tested whether they were still able to perceive bark structure properly
and adopt adaptive resting orientations. We found that visual information or stimulation is crucial for adaptively
orienting their bodies when resting and tactile information from wings may play an additional role. The present
study reveals multimodal information use by moths to achieve visual camouflage and highlights the sensory
mechanism that is responsible for the adaptive behaviour of cryptic insects.