Figure 1

Figure 2

Figure 3

Figure 4

Morphometric characteristics of the abnormal and normal specimens of A_ escherichii collected from the Sakarya River Basin, Türkiye
| Morphometric characteristics (millimeter) | Abnormal specimen | Normal specimen |
|---|---|---|
| TL | 117.7 | 109.43 |
| SL | 95.6 | 88.1 |
| SL (% TL) | 81.2 | 80.5 |
| HL (% SL) | 20.7 | 20.1 |
| ED (% HL) | 25.0 | 30.5 |
| PreDFL (% SL) | 50.9 | 54.1 |
| PostDFL (% SL) | 70.7 | 94.7 |
| PrePFL (% SL) | 46.6 | 22.7 |
| PrePELFL (% SL) | 63.9 | 48.9 |
| PreAFL (% SL) | 75.1 | 69.0 |
| PostAFL (% SL) | 75.9 | 83.4 |
| BD (% SL) | 27.6 | 27.1 |
| CPD (% SL) | 9.6 | 10.4 |
| CPL (% SL) | 13.8 | 13.1 |