Table 1

Total number and size classes of gobid fishes caught at four surveyed sites.

Site Coordinates River (km) Date Species Total number < 5 Size class (cm)
6–10
11–15
  41°44'14.70"N2     Babka gymnotrachelus 8 8 0 0
Evros_UP 6°14'7.24"E 202 10/9/2018 Proterorhinus semilunaris 27 13 11 3
        Neogobius fluviatilis 0 0 0 0
  41°34'17.08"N     Babka gymnotrachelus 5 2 3 0
Evros_MD   156 10/9/2018 Proterorhinus semilunaris 9 6 3 0
  26°35'12.99"E              
        Neogobius fluviatilis 7 6 1 0
  41°20'41.08"N     Babka gymnotrachelus 0 0 0 0
Erythro_DW 26°29'38.50"E 117 11/9/2018 Proterorhinus semilunaris 0 0 0 0
        Neogobius fluviatilis 0 0 0 0
    41°6'41.48"N     Babka gymnotrachelus 0 0 0 0
Lykofos 26°18'12.43"E 75 12/9/2018 Proterorhinus semilunaris 76 70 6 0
      Neogobius fluviatilis 3 2 1 0

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