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Physiological ecology of Mediterranean blue tits (Parus caeruleus L.): effects of ectoparasites (Protocalliphora spp.) and food abundance on metabolic capacity of nestlings.
Physiol Biochem Zool. 2004 May-Jun; 77(3):492-501.PB

Abstract

The consequences of nest ectoparasites, such as Protocalliphora larvae, on nestling birds have been the subject of numerous studies. Despite observed reductions in mass and hematocrit of chicks from parasitized nests, no studies have found any effect of Protocalliphora on nestling survival, suggesting that fitness consequences of Protocalliphora are either weak or occur after fledging. From experiments on the metabolic performance of chicks, we found that parasitized chicks suffer from reduced thermogenic and metabolic capacities as a result of decreased mass and hematocrit. Hence, Protocalliphora may potentially affect nestling survival after fledging, when energetically costly activities such as flight and moult are undertaken. Previous studies have demonstrated an increase in parental feeding rate to compensate for the detrimental consequences of parasite infestation. We tested whether parasite effects on nestling aerobic capacity were dependent on food availability during the feeding period. Measures of caterpillar densities and experimental manipulations of parasite loads allowed us to investigate relationships among host, parasite, and environment. A positive relationship between chick aerobic and thermogenic performances and caterpillar density suggests that negative effects of parasitism may be offset by increased food availability. This study provides the first measurement of the effects of an ectoparasite on metabolic competence in wild birds and documentation of the effect of food availability on ectoparasite virulence using a quantitative measure of food abundance.

Authors+Show Affiliations

Groupe de Recherche en Ecologie, Nutrition, et Energétique, Centre de Recherche en Biologie Forestière, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada. aurelie@hermes.usherb.caNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15286922

Citation

Simon, Aurélie, et al. "Physiological Ecology of Mediterranean Blue Tits (Parus Caeruleus L.): Effects of Ectoparasites (Protocalliphora Spp.) and Food Abundance On Metabolic Capacity of Nestlings." Physiological and Biochemical Zoology : PBZ, vol. 77, no. 3, 2004, pp. 492-501.
Simon A, Thomas D, Blondel J, et al. Physiological ecology of Mediterranean blue tits (Parus caeruleus L.): effects of ectoparasites (Protocalliphora spp.) and food abundance on metabolic capacity of nestlings. Physiol Biochem Zool. 2004;77(3):492-501.
Simon, A., Thomas, D., Blondel, J., Perret, P., & Lambrechts, M. M. (2004). Physiological ecology of Mediterranean blue tits (Parus caeruleus L.): effects of ectoparasites (Protocalliphora spp.) and food abundance on metabolic capacity of nestlings. Physiological and Biochemical Zoology : PBZ, 77(3), 492-501.
Simon A, et al. Physiological Ecology of Mediterranean Blue Tits (Parus Caeruleus L.): Effects of Ectoparasites (Protocalliphora Spp.) and Food Abundance On Metabolic Capacity of Nestlings. Physiol Biochem Zool. 2004 May-Jun;77(3):492-501. PubMed PMID: 15286922.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Physiological ecology of Mediterranean blue tits (Parus caeruleus L.): effects of ectoparasites (Protocalliphora spp.) and food abundance on metabolic capacity of nestlings. AU - Simon,Aurélie, AU - Thomas,Don, AU - Blondel,Jacques, AU - Perret,Philippe, AU - Lambrechts,Marcel M, PY - 2003/10/21/accepted PY - 2004/8/3/pubmed PY - 2004/10/22/medline PY - 2004/8/3/entrez SP - 492 EP - 501 JF - Physiological and biochemical zoology : PBZ JO - Physiol. Biochem. Zool. VL - 77 IS - 3 N2 - The consequences of nest ectoparasites, such as Protocalliphora larvae, on nestling birds have been the subject of numerous studies. Despite observed reductions in mass and hematocrit of chicks from parasitized nests, no studies have found any effect of Protocalliphora on nestling survival, suggesting that fitness consequences of Protocalliphora are either weak or occur after fledging. From experiments on the metabolic performance of chicks, we found that parasitized chicks suffer from reduced thermogenic and metabolic capacities as a result of decreased mass and hematocrit. Hence, Protocalliphora may potentially affect nestling survival after fledging, when energetically costly activities such as flight and moult are undertaken. Previous studies have demonstrated an increase in parental feeding rate to compensate for the detrimental consequences of parasite infestation. We tested whether parasite effects on nestling aerobic capacity were dependent on food availability during the feeding period. Measures of caterpillar densities and experimental manipulations of parasite loads allowed us to investigate relationships among host, parasite, and environment. A positive relationship between chick aerobic and thermogenic performances and caterpillar density suggests that negative effects of parasitism may be offset by increased food availability. This study provides the first measurement of the effects of an ectoparasite on metabolic competence in wild birds and documentation of the effect of food availability on ectoparasite virulence using a quantitative measure of food abundance. SN - 1522-2152 UR - https://www.unboundmedicine.com/medline/citation/15286922/Physiological_ecology_of_Mediterranean_blue_tits__Parus_caeruleus_L__:_effects_of_ectoparasites__Protocalliphora_spp___and_food_abundance_on_metabolic_capacity_of_nestlings_ L2 - http://dx.doi.org/10.1086/383512 DB - PRIME DP - Unbound Medicine ER -