Physiology and development of the M and S molecular forms of Anopheles gambiae in Burkina Faso

Physiology and development of the M and S molecular forms of Anopheles gambiae in Burkina Faso Mouline Karine auteur aut IRD Mamai W. auteur aut IRD Agnew P. auteur aut IRD Tchonfienet M. auteur aut IRD Brengues Cécile auteur aut IRD Dabiré R. auteur aut IRD Robert Vincent auteur aut IRD Simard Frédéric auteur aut IRD text journalArticle eng text/pdf born digital access In West Africa, M and S molecular forms of Anopheles gambiae sensu stricto (Diptera: Culicidae) Giles, frequently occur together, although with different population bionomics. The S form typically breeds in rain-dependant water collections and is present during the rainy season only whereas the M form can thrive all year long in areas with permanent breeding opportunities. In the present study, we explored physiological and developmental trade-offs at play in laboratory colonies and field populations of the M and S forms that originated from an area of sympatry in Burkina Faso, where M and S larvae exhibit such habitat segregation. In the laboratory, larvae of the M form developed slower than the S form (mean values 9.51 and 8.85 days, respectively, Wilcoxon's test, P < 0.001). Although wing length and dry weight at emergence showed large variations, M females were on average 8% heavier than S females of similar wing length. Higher nutritional reserves (proteins and lipids) in teneral adults explained part of this weight difference, reflecting a better ability of the M form to garner resources at the larval stage. Furthermore, a higher rate of ovarian maturation was observed in the M form after a single bloodmeal. The relevance of these findings for parasite transmission is discussed. specialized Anopheles gambiae emergence nutritional reserves ovarian development size-corrected weight trade-offs 052 Medical and Veterinary Entomology 26 4 447-454 2012 0269-283X https://www.documentation.ird.fr/hor/fdi:010058202 10.1111/j.1365-2915.2012.01018.x 0269-283X [F B010058202] https://www.documentation.ird.fr/hor/fdi:010058202 https://www.documentation.ird.fr/intranet/publi/2012/12/010058202.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2013-01-09 2017-08-23 fdi:010058202 fre