title: Maternally invested carotenoids compensate costly ectoparasitism in the hihi.
abstract: Dietary ingested carotenoid biomolecules have been linked to both improved health and immunity in nestling birds. Here, we test whether maternally invested egg carotenoids can offset the cost of parasitism in developing nestling hihi (Notiomystis cincta) from the bloodsucking mite (Ornithonyssus bursa). Our results reveal clear negative effects of parasitism on nestlings, and that maternally derived carotenoids compensate this cost, resulting in growth parameters and ultimate mass achieved being similar to nonparasitized young. Our results offer an unique example of a direct positive relationship between enhanced maternal investment of carotenoids and an ability to cope with a specific and costly parasite in young birds. As O. bursa infestations reduce population viability in hihi, our findings also highlight the importance of key nutritional resources for endangered bird populations to better cope with common parasite infestations.
authors.affiliation: Institute of Zoology, Zoological Society of London, Regents Park, London NW1 4RY, United Kingdom. john.ewen@ioz.ac.uk
authors.forename: John G
authors.initials: JG
authors.lastname: Ewen
authors.forename: Rose
authors.initials: R
authors.lastname: Thorogood
authors.forename: Patricia
authors.initials: P
authors.lastname: Brekke
authors.forename: Phillip
authors.initials: P
authors.lastname: Cassey
authors.forename: Filiz
authors.initials: F
authors.lastname: Karadas
authors.forename: Doug P
authors.initials: DP
authors.lastname: Armstrong
mesh_terms: D000818:Animals; D002338:Carotenoids / Q000008:administration & dosage*; D005260:Female; D008297:Male; D008925:Mites / Q000254:growth & development*; D009425:Nesting Behavior; D046109:Passeriformes / Q000469:parasitology* / Q000502:physiology
chemical_list: D002338:Carotenoids