Reproductive Output of Female Anopheles gambiae (Diptera: Culicidae): Comparison of Molecular Forms

Knowledge of ecological differences between the molecular forms of Anopheles gambiae Giles (Diptera: Culicidae) might lead to understanding of their unique contribution to disease transmission, to better vector control, and to identification of the forces that have separated them. We compared female...

Full description

Saved in:
Bibliographic Details
Published in:Journal of medical entomology 2006-09, Vol.43 (5), p.833-839
Main Authors: Yaro, A. S., Dao, A., Adamou, A., Crawford, J. E., Traoré, S. F., Touré, A. M., Gwadz, R., Lehmann, T.
Format: Article
Language:English
Subjects:
Anopheles arabiensis
Anopheles gambiae
Culicidae
Diptera
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Knowledge of ecological differences between the molecular forms of Anopheles gambiae Giles (Diptera: Culicidae) might lead to understanding of their unique contribution to disease transmission, to better vector control, and to identification of the forces that have separated them. We compared female fecundity measured as egg batch size in relation to body size between the molecular forms in Mali and contrasted them with their sibling species, Anopheles arabiensis Patton. To determine whether eggs of different egg batches are of similar âquality,â we compared the total protein content of first-stage larvae (L1s), collected < 2 h after hatching in deionized water. Egg batch size significantly varied between An. gambiae and An. arabiensis and between the molecular forms of An. gambiae (mean batch size was 186.3, 182.5, and 162.0 eggs in An. arabiensis and the M and the S molecular form of An. gambiae, respectively). After accommodating female body size, however, the difference in batch size was not significant. In the S molecular form, egg protein content was not correlated with egg batch size (r = â0.08, P > 0.7) nor with female body size (r = â0.18, P > 0.4), suggesting that females with more resources invest in more eggs rather than in higher quality eggs. The mean total protein in eggs of the M form (0.407 μg per L1) was 6% higher than that of the S form (0.384 μg per L1), indicating that the M form invests a greater portion of her resources into current (rather than future) reproduction. A greater investment per offspring coupled with larger egg batch size may reflect an adaptation of the M form to low productivity larval sites as independent evidence suggests.
ISSN:0022-2585
0022-2585
DOI:10.1603/0022-2585(2006)43[833:ROOFAG]2.0.CO;2