Table 5. Egg cluster and egg measurement comparison between different experimentally-maintained populations of Lymnaea schirazensis and Galba truncaula from different geographical origins.
| Clusters | Eggs | |||||||||
| Species and populations | Area (CA) | Roundness (CR) | Length (CL) | Maximum Width (CW) | CL/CW ratio | No. of eggs/cluster (CEN) | CEN/CA ratio | Length (EL) | Width (EW) | EL/EW ratio |
| Lymnaea schirazensis : | ||||||||||
| Tiba, Delengate, Egypt (n = 30 clusters+189 eggs) | 4.77−13.27 8.31±2.14) | 1.46−3.63 (2.22±0.53) | 3.34−6.88 (4.74±0.94) | 1.96−4.33 (3.01±0.65) | 1.08−2.52 (1.61±0.32) | 6−19 (11.50±3.30) | 1.02−2.10 (1.40±0.28) | 0.62−0.87 (0.72±0.04) | 0.53−0.72 (0.61±0.03) | 1.08−1.41 (1.18±0.06) |
| Albufera, Valencia, Spain (n = 30 clusters+195 eggs) | 4.55−12.72 (7.77±1.89 | 1.23−2.21 (1.70±0.23) | 2.81−6.07 (4.33±0.70) | 1.94−3.78 (2.61±0.49) | 1.19−2.14 (1.68±0.26) | 6−23 (14.00±4.63) | 1.32−2.48 (1.78±0.27) | 0.63−0.82 (0.72±0.04) | 0.52−0.65 (0.59±0.03) | 1.11−1.35 (1.21±0.05) |
| Laguna, Atlixco, Mexico (n = 30 clusters+130 eggs) | 1.80−6.49 (3.87±1.33) | 1.31−2.08 (1.55±0.17) | 2.07−4.47 (3.10±0.61) | 1.19−2.46 (1.71±0.36) | 1.43−2.28 (1.83±0.23) | 3−12 (7.07±3.00) | 1.29−2.19 (1.78±0.25) | 0.57−0.71 (0.65±0.03 | 0.46−0.59 (0.53±0.02) | 1.12−1.35 (1.23±0.06) |
| Esc. Obregon, Trinidad Tep., Mexico (n = 30 clusters+92 eggs) | 1.47−6.33 (3.69±1.29) | 1.22−1.63 (1.42±0.12) | 1.73−4.21 (2.96±0.61) | 1.01−2.03 (1.62±0.28) | 1.47−2.42 (1.83±0.22) | 2−10 (5.87±2.13) | 1.11−2.02 (1.59±0.25) | 0.60−0.83 (0.67±0.03) | 0.48−0.65 (0.59±0.02) | 1.11−1.36 (1.21±0.06) |
| Xalpatlaco 1, Atlixco, Mexico (n = 30 clusters+98 eggs) | 1.34−7.22 (4.22±1.80) | 1.13−1.76 (1.38±0.12) | 1.72−4.19 (3.01±0.75) | 1.02−2.48 (1.76±0.38) | 1.33−2.05 (1.70±0.19) | 2−10 (6.67±2.37) | 1.11−2.24 (1.64±0.32) | 0.56−0.83 (0.69±0.07) | 0.46−0.69 (0.56±0.06) | 1.12−1.40 (1.23±0.06) |
| Xalpatlaco 2, Atlixco, Mexico (n = 30 clusters+136 eggs) | 2.04−7.49 (4.79±1.50) | 1.25−2.05 (1.52±0.18) | 2.02−4.41 (3.33±0.62) | 1.19−2.92 (1.94±0.41) | 1.39−2.02 (1.73±0.18) | 3−18 (8.60±3.29) | 1.00−2.40 (1.78±0.30) | 0.58−0.79 (0.65±0.04) | 0.48−0.68 (0.54±0.03) | 1.12−1.35 (1.21±0.05 |
| Jiutepec, Morelos, Mexico (n = 30 clusters+106 eggs) | 1.67−6.77 (4.54±1.47) | 1.01−2.34 (1.43±0.31) | 1.75−4.15 (3.21±0.64) | 1.20−2.90 (1.87±0.35) | 1.23−2.29 (1.72±0.22) | 2−10 (6.13±1.93) | 1.03−2.29 (1.39±0.36) | 0.61−0.86 (0.74±0.07) | 0.50−0.69 (0.59±0.06) | 1.14−1.49 (1.25±0.07) |
| TOTAL | 1.34−13.27 (5.31±2.41) | 1.01−3.63 (1.60±0.39) | 1.72−6.88 (3.53±0.96) | 1.01−4.33 (2.07±0.65) | 1.08−2.52 (1.71±0.26) | 2−23 (8.55±4.17) | 1.00−2.48 (1.62±0.33) | 0.56−0.87 (0.69±0.06) | 0.46−0.72 (0.57±0.05) | 1.08−1.49 (1.22±0.06) |
| Galba truncatula : | ||||||||||
| Albufera, Valencia, Spain (n = 15 clusters+92 eggs) | 2.35−6.54 (4.58±1.29) | 1.08−1.30 (1.18±0.06) | 1.84−3.69 (2.73±0.53) | 1.58−2.48 (2.11±0.26) | 1.10−1.66 (1.29±0.18) | 2−9 (6.13±2.23) | 0.83−1.74 (1.31±0.21) | 0.55−0.93 (0.71±0.07) | 0.51−0.73 (0.60±0.04) | 1.03−1.53 (1.18±0.10) |
| Oued Tiout, Essaouira, Marruecos (n = 42 clusters+100 eggs) | 3.82−11.67 (6.45±1.48) | 1.00−1.82 (1.24±0.15) | 2.42−4.79 (3.39±0.60) | 1.90−3.27 (2.43±0.29) | 1.03−2.17 (1.45±0.28) | 5−15 (7.81±2.37) | 0.81−1.84 (1.21±0.24) | 0.62−0.87 (0.75±0.05) | 0.52−0.77 (0.62±0.05) | 1.09−1.32 (1.20±0.05) |
| TOTAL | 2.35−11.67 (5.95±1.64) | 1.00−1.82 (1.22±0.13) | 1.84−4.79 (3.29±0.67) | 1.58−3.27 (2.34±0.32) | 1.03−2.17 (1.41±0.26) | 2−15 (7.37±2.43) | 0.81−1.84 (1.24±0.23) | 0.55−0.93 (0.73±0.06) | 0.51−0.77 (0.61±0.05) | 1.03−1.53 (1.19±0.08) |
Range include minimum and maximum extremes, with mean±standard deviation SD in parentheses. Measurements in mm (area in mm2). n = number of specimens measured.