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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Polyandry is a common event in wild populations of the tsetse fly Glossina fuscipes fuscipes and may impact population reduction measures
PLoS Neglected Tropical Diseases, Volume 5, No. 6, Article e1190, Year 2011
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Description
Background: Glossina fuscipes fuscipes is the main vector of human and animal trypanosomiasis in Africa, particularly in Uganda. Attempts to control/eradicate this species using biological methods require knowledge of its reproductive biology. An important aspect is the number of times a female mates in the wild as this influences the effective population size and may constitute a critical factor in determining the success of control methods. To date, polyandry in G.f. fuscipes has not been investigated in the laboratory or in the wild. Interest in assessing the presence of remating in Ugandan populations is driven by the fact that eradication of this species is at the planning stage in this country. Methodology/Principal Findings: Two well established populations, Kabukanga in the West and Buvuma Island in Lake Victoria, were sampled to assess the presence and frequency of female remating. Six informative microsatellite loci were used to estimate the number of matings per female by genotyping sperm preserved in the female spermathecae. The direct count of the minimum number of males that transferred sperm to the spermathecae was compared to Maximum Likelihood and Bayesian probability estimates. The three estimates provided evidence that remating is common in the populations but the frequency is substantially different: 57% in Kabukanga and 33% in Buvuma. Conclusions/Significance: The presence of remating, with females maintaining sperm from different mates, may constitute a critical factor in cases of re-infestation of cleared areas and/or of residual populations. Remating may enhance the reproductive potential of re-invading propagules in terms of their effective population size. We suggest that population age structure may influence remating frequency. Considering the seasonal demographic changes that this fly undergoes during the dry and wet seasons, control programmes based on SIT should release large numbers of sterile males, even in residual surviving target populations, in the dry season. © 2011 Bonomi et al.
Authors & Co-Authors
Bonomi, Angelica
Italy, Pavia
Università Degli Studi Di Pavia
Bassetti, Federico
Italy, Pavia
Università Degli Studi Di Pavia
Gabrieli, Paolo
Italy, Pavia
Università Degli Studi Di Pavia
Beadell, Jon S.
United States, New Haven
Yale University
Falchetto, Marco
Italy, Pavia
Università Degli Studi Di Pavia
Scolari, Francesca
Italy, Pavia
Università Degli Studi Di Pavia
Gomulski, Ludvik Marcus
Italy, Pavia
Università Degli Studi Di Pavia
Regazzini, Eugenio
Italy, Pavia
Università Degli Studi Di Pavia
Ouma, Johnson Odera
Kenya, Nairobi
Kenya Agricultural Research Institute
Caccone, Adalgisa
United States, New Haven
Yale University
Okedi, Loyce M.A.
Uganda, Tororo
National Livestock Resources Research Institute
Attardo, Geoffrey Michael
United States, New Haven
Yale University
Guglielmino, Carmela Rosalba
Italy, Pavia
Università Degli Studi Di Pavia
Aksoy, Serap
United States, New Haven
Yale University
Malacrida, Anna Rodolfa
Italy, Pavia
Università Degli Studi Di Pavia
Statistics
Citations: 35
Authors: 15
Affiliations: 4
Identifiers
Doi:
10.1371/journal.pntd.0001190
ISSN:
19352727
e-ISSN:
19352735
Research Areas
Sexual And Reproductive Health
Study Design
Cross Sectional Study
Study Locations
Uganda
Participants Gender
Female