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    High Prevalence of Louse Flies on Osprey Nestlings in a Baja California Colony

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    Author
    Rodríguez-Estrella, Ricardo
    Rivera-Rodríguez, Laura B.
    Affiliation
    Univ Arizona, Sch Nat Resources & Environm
    Issue Date
    2019-05-09
    Keywords
    Osprey
    Pandion haliaetus
    louse fly
    Olfersia fumipennis
    Baja California
    infestation
    Mexico
    parasite
    reproductive rate
    sex ratio
    
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    Publisher
    RAPTOR RESEARCH FOUNDATION INC
    Citation
    Ricardo Rodríguez-Estrella and Laura B. Rivera-Rodríguez "High Prevalence of Louse Flies on Osprey Nestlings in a Baja California Colony," Journal of Raptor Research 53(2), 142-149, (9 May 2019). https://doi.org/10.3356/JRR-17-59
    Journal
    JOURNAL OF RAPTOR RESEARCH
    Rights
    Copyright © 2019 The Raptor Research Foundation, Inc.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    We studied the prevalence of a louse fly (Olfersia fumipennis) in a dense breeding colony of Ospreys (Pandion haliaetus) at San Ignacio Lagoon, Baja California Sur, Mexico. We determined fly prevalence and infestation intensity of 45 nestlings (age 32–59 d). We found louse flies in 65% of the nests sampled (n = 34). Louse fly prevalence in nestlings (n = 45) was 56%, the highest rate reported for any raptor species. Male and female nestlings showed similar levels of fly prevalence and infestation, possibly because the numbers of each sex in this population were similar. We found that louse flies had a spatially dispersed distribution, such that the proximity of any nest to any other within the colony did not influence the prevalence of louse flies nor the louse fly load. The productivity of nests with parasitized young (1.3 ± 0.5 young/nest) was similar to that of nests with young that were not parasitized (1.4 ± 0.6 young/nest; P > 0.05). In terms of spatial location, the overall productivity (number of young per successful nest) of the colony was affected by louse fly prevalence. The condition of coloniality (i.e., high density of nests) likely caused high overall louse fly prevalence. A high prevalence of parasitism might be part of the cost of nesting in colonial conditions. Additional studies on the prevalence of louse flies and the health and body condition of nestlings are needed to evaluate the health of Osprey populations.
    ISSN
    0892-1016
    DOI
    10.3356/jrr-17-59
    Version
    Final published version
    Sponsors
    CIBNOR; Consejo Nacional de Ciencia y Tecnologia [SEMARNAT-CONACyT C01-0318, SEMARNAT-CONACyT 0023861, SEP-CONACyT 45737, SEP-CONACyT 155956]; CONACyT; Universidad Autonoma de Sinaloa
    ae974a485f413a2113503eed53cd6c53
    10.3356/jrr-17-59
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    UA Faculty Publications

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