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Table 1 Sampled populations and sample size.

From: Trade-off between morphological convergence and opportunistic diet behavior in fish hybrid zone

Pop. Treatment N DNA N Sex N Age N Body shape N K Study N Mouth shape N CN* Study
Ain Ctt Allopatry 30 30 29 30 29 This study 22 15 This study
Berre Ctt   31 0 29 31 29 This study 28 15  
Chee Cnn   30 17 30 29 30 This study 30 15  
Tisza Cnn   24 19 24 24 23 This study 18 15  
Tarn Ctt   27 22 27 26 27 This study 21 15  
Dniester Cnb   29 0 12 26 12 This study 26 15  
LRHY Sympatry 136 110 133 134 126 [10] 107 42  
HRHY   169 79 169 166 169 [10] 115 10  
LRCnn   146 96 141 145 135 [10] 109 40  
LRCtt   154 114 153 154 143 [10] 117 18  
HRCnn   34 14 33 34 33 [10] 22 8  
HRCtt   520 309 514 508 513 [10] 296 26  
Total   1330 810 1294 1307 1269   911 234  
  1. Cnn = Chondrostoma nasus nasus; Ctt = Chondrostoma toxostoma toxostoma; Hy = Hybrids; HR = Highly regulated river part; LR = Less regulated river part. * For CN analysis we added one allopatric Ctt population (Doubs N=15) and three Cnn populations (Allier N = 15, Flet N = 15, Usses N = 15). See text for details of the identification of C. n. borysthenicum in Dniester river.