Ardea | |
Sources of Variation in Enterococci and Enterobacteriaceae Loads in Nestlings of a Hole-Nesting Passerine | |
Rafael Ruiz-de-Castañeda1  Sonia González-Braojos1  Ana I. Vela2  VÃctor Briones2  Juan Moreno1  | |
[1] 1 Departamento de EcologÃa Evolutiva, Museo Nacional de Ciencias Naturales-CSIC, José Gutiérrez Abascal 2, 28006 Madrid, Spain;2 Centro de Vigilancia Sanitaria Veterinaria, Universidad Complutense de Madrid, Avda Puerta del Hierro s/n, 28040 Madrid, Spain 3 Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda Puerta del Hierro s/n, 28040 Madrid, Spain | |
关键词: Hatching Date; | |
DOI : | |
学科分类:动物科学 | |
来源: Nederlandse Ornithologische Unie/Netherlands Ornithological Union | |
【 摘 要 】
Gutbacterialloadsinaviannestlingsmaybeaffectedbyfactorssuchasclimate,seasonalityandbroodsize.Thereisnopublishedinformationonthissubjectforwildbirds,despiteitspotentialimportancefornestlingwelfareandgrowth.Westudiedtheassociationsofthesefactorswithabundancesoftwocommongutbacterialtypes,enterococciandEnterobacteriaceae,innestlingPiedFlycatchersFicedulahypoleucaincentralSpain.Tothatend,weobtainedfaecalsamplesfrom54broods(102nestlings)onday7and13afterhatching,fordetectionandestimationofbacterialabundance.Enterobacteriaceaeloadsonday7werepositivelycorrelatedwithmeantemperatureduringtheprecedingsevendaysandnegativelycorrelatedwithrainfallandhatchingdate.ThenegativeassociationsofEnterobacteriaceaeloadswithrainfallwereonlyfoundforearlybroods,atlowtemperatures.Enterococciloadsonday7werepositivelyassociatedwithmeantemperature.Onday13,Enterobacteriaceaeloadswerenegativelycorrelatedwithhatchingdate,whileenterococciloadswerepositivelycorrelatedwithmeantemperature.Enterobacteriaceaeareapparentlymoresensitivetoseasonalchangesandclimaticvariationthanenterococci,possiblyinrelationtovariationindietandnutrition.Bycontrast,enterococciareonlysensitivetothermalvariation.TheattainmentoffullthermoregulatorycapacitybynestlingsreducesclimaticeffectsonEnterobacteriaceaeloads.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912090719639ZK.pdf | 100KB | download |