Figure 7
Variation of male body shape along climatic gradients. Increasing values of climatic PC1 (north to south) were associated with (a) more slender bodies, longer caudal peduncles and a more anterior gonopodium position in inland populations (climatic PC2 ≥ median) but a reversed trend in coastal populations (climatic PC2 < median), (b) more upward-oriented pectoral and caudal fins in coastal populations, which was not detected in inland populations, and (c) more slender bodies, smaller heads, and decreased peduncle lengths in inland populations, while the trend was reversed in coastal populations, (d) more slender bodies and increased caudal peduncle lengths across sites, (e) more slender bodies, longer caudal peduncles and a more anterior gonopodium, and (f) more upward-oriented pectoral and caudal fins. As climatic PC2 increases, (g) males showed deeper bodies, shorter caudal peduncles and a more posterior gonopodium, and (h) their pectoral and caudal fins had a lower position.
