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Ecdysteroids are present in the blood of wild passerine birds.

Abstract：

:Ecdysteroids (arthropod molting hormones) play an important role in the development and sexual maturation of arthropods, and they have been shown to have anabolic and "energizing" effect in higher vertebrates. The aim of this study was to assess ecdysteroid diversity, levels according to bird species and months, as well as to observe the molting status of hard ticks (Acari: Ixodidae) infesting the birds. Therefore, blood samples and ticks were collected from 245 birds (244 songbirds and a quail). Mass spectrometric analyses showed that 15 ecdysteroids were regularly present in the blood samples. Molting hormones biologically most active in insects (including 20-hydroxyecdysone [20E], 2deoxy-20E, ajugasterone C and dacryhainansterone) reached different levels of concentration according to bird species and season. Similarly to ecdysteroids, the seasonal presence of affected, apolytic ticks peaked in July and August. In conclusion, this study demonstrates the presence of a broad range and high concentrations of ecdysteroids in the blood stream of wild-living passerine birds. These biologically active, anabolic compounds might possibly contribute to the known high metabolic rate of songbirds.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Hornok S,Csorba A,Kováts D,Csörgő T,Hunyadi A

doi

10.1038/s41598-019-53090-9

subject

Has Abstract

pub_date

2019-11-18 00:00:00

pages

17002

issue

1

issn

2045-2322

pii

10.1038/s41598-019-53090-9

journal_volume

9

pub_type

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