Table 1 Specifications of the qualitative model for age-grading, describing the required combination of morphological traits for a male to be estimated as 'young' (≤ 4 days), or 'old' (> 4 days) under this model.
From: A reliable morphological method to assess the age of male Anopheles gambiae
Number of spermatocysts | Percentage of testis occupied by the sperm reservoir | Clear area present | Predicted age (days) |
|---|---|---|---|
3 – 5 | 10 – 50% | Yes or no | ≤ 4 |
0 – 2 | 50 – 100% | no | > 4 |