Sex-ratio daily evolution in a population of Mononychellus tanajoa Bondar (Acari: Tetranychidae) in the laboratory.
The sex-ratio (number of females/number of males) of offsprings laid by fertilized female parents of Mononychellus tanajoa Bondar and its daily evolution was studied in the laboratory. The lowest sex-ratio value 0.1 (10.0% female offsprings) was obtained on the first day of the oviposition and the highest value 13.9 (93.3% female offsprings) on the 16th day of the oviposition period which lasted 38.1 +/- 4.9 days (mean +/- standard deviation). From a total number of 118.0 +/- 10.9 offsprings, 94.0 +/- 10.5 (on the average 79.7%) were "laid" during the first half of the oviposition period. The results also show that from a total number of 88.0 +/- 8.3 female offsprings, 74.0 +/- 8.0 (84.1%) were "laid" during the first half of the oviposition period whereas from a total number of 30.0 +/- 2.7 male offsprings, 20.0 +/- 2.5 (66.7%) were "laid" within the same period. The sex-ratio of each fertilized female parent was 3.1 +/- 0.2 (75.8% +/- 1.0 female offsprings) and the sex-ratio within the mites population was 2.9 +/- 0.0 (74.6% +/- 0.1 female offsprings).
Badegana
A M
AM
Faculty of Agriculture and Agronomic Sciences, University of Dschang, P.O. Box 96, Dschang, Cameroon.
D000818:Animals; D005260:Female; D008018:Life Cycle Stages; D008297:Male; D010058:Oviposition / Q000502:physiology*; D011157:Population Dynamics; D012744:Sex Ratio; D040102:Tetranychidae / Q000502:physiology*; D013997:Time Factors