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All issues No 424 (2023) Knowl. Manag. Aquat. Ecosyst., 424 (2023) 12 Full HTML

Table 2

Number of individuals (n), biomass (g) and range size (mm) of captured fishes for the Berneau (FW1-B), Lorcé (FW2-A) and Grosse-Battes (FW3-O) fishways.

Species FW1-B
  n g mm n g mm n g mm n g mm n g mm n g mm
  2002-2003 2003-2004 2004-2005 2005-2006 2006-2007 2007-2008
Rheophilic species 336 48236 – 167 22250 – 168 22258 – 203 12124 – 217 19052 – 149 15163 –
Trout 74 30305 225-575 53 18152 96-590 43 15177 129-458 31 9463 109-382 40 13088 75-472 23 10868 130-510
Rainbow trout – – – 1 229 283 – – – – – – 1 320 294 2 504 270–317
Barbel 7 13697 370–606 – – – 1 1150 458 1 353 312 1 1248 467 1 8 87
Chub 52 2670 64–362 93 3591 60–410 111 5776 78–415 43 1606 49–288 73 3389 57–370 38 2683 70–414
Nase – – – – – – – – – 1 4 72 – – – – – –
Spirlin 201 1564 62–116 20 278 83–102 13 155 78–108 127 698 57–740 102 1007 71–129 85 1100 71–129
Eurytopic species 62 2516 – 13 186 – 7 40 – 165 1733 – 3 11 – 14 50 –
Roach 2 152 135–192 1 129 96 – – – – – – – – – – – –
Gudgeon – – – – – – – – – 3 65 108–130 – – – – – –
Minnow 57 177 50–80 12 57 55–80 7 40 61–92 160 348 31–84 2 10 64–77 11 47 57–83
Eel 3 2187 720–765 – – – – – – 2 1320 686–740 – – – – – –
T.S stickleback – – – – – – – – – – – – 1 1 41 3 3 40–46
Limnophilic species 1 2498 – – – – – – – – – – 1 15 – – – –
Perch – – – – – – – – – – – – 1 15 105 – – –
Carp 1 2498 427 – – – – – – – – – – – – – – –
Total 397 53250 – 180 22436 – 175 22298 – 368 13857 – 221 19078 – 163 15213 –
Species FW2-A
  2007–2008 2008–2009 2009–2010 2010–2011 2011–2012 2012–2013 2013–2014 2014–2015
  n g mm n g mm n g mm n g mm n g mm n g mm n g mm n g mm
Rheophilic species 392 153722 – 121 40343 – 199 70013 – 666 64733 – 152 88110 – 113 26822 – 324 57634 – 420 107103 –
Trout 219 40285 62–439 72 11101 78–379 79 15362 11–343 63 12966 41–354 59 25635 83–417 51 8246 92–453 138 26098 84–606 179 33860 84–505
Rainbow trout 3 391 133–256 13 5098 210–478 25 12650 276–499 21 11123 235–540 8 14567 180–464 12 4304 202–394 14 10835 307–464 54 22839 187–492
Brook trout – – – – – – – – – – – – – – – – – – – – – 3 1272 319–335
Barbel 62 97910 131–595 6 9532 259–554 30 39345 54–575 23 27579 55–620 6 35464 54–544 5 8634 418–558 9 15036 427–580 32 42366 52–640
Chub 12 6166 106–465 9 10572 123–510 3 1374 85–463 35 7475 115–510 8 7641 72–140 11 2976 83–506 2 171 119–220 4 190 136–186
Nase 2 3269 490–500 – – – – – – 1 13 108 – – – 1 27 125 – – – – – –
Spirlin 56 565 74–102 3 34 92–99 49 291 53–105 472 3137 61–121 52 1206 61–115 22 129 66–98 117 2145 58–115 125 2909 54–112
Dace 8 243 103–177 – – – 4 42 82–127 33 451 78–188 6 488 76–97 1 76 184 16 333 83–210 5 303 66–250
Grayling 26 4880 173–425 13 3987 179–438 8 945 176–296 10 1934 168–349 11 3041 178–282 10 2430 176–305 25 2991 154–338 16 3340 110–375
Loach 2 2 55–59 3 11 63–90 1 4 80 5 24 42–86 1 26 79 – – – 3 25 98–105 1 5 89
Bullhead 2 11 77–85 2 8 62–63 – – – 3 31 36–81 1 42 69 – – – – – – 1 19 106
Eurytopic species 147 3926 – 145 1108 – 1134 2707 – 535 2019 – 8 561 – 47 452 – 28 631 – 68 3410 –
Common bleak – – – – – – – – – – – – – – – 2 15 72–94 – – – – – –
Bream 1 1528 456 – – – 1 6 69 – – – – – – – – – – – – – – –
Silver bream – – – 1 58 144 – – – – – – – – – – – – – – – – – –
Roach – – – 2 61 110–140 – – – 3 43 74–109 – – – 1 80 171 4 79 103–114 7 164 84–180
Gudgeon 118 2175 88–150 23 561 100–138 12 271 76–141 34 390 71–124 8 561 94–136 16 276 93–231 23 516 101–145 14 288 100–140
Minnow 26 79 39–74 118 426 52–69 1121 2430 44–87 497 1585 55–82 – – – 28 81 56–78 – – – 47 2958 52–86
Eel 1 143 469 – – – – – – – – – – – – – – – 1 36 296 – – –
T.S stickleback 1 1 50 1 2 52 – – – 1 1 46 – – – – – – – – – – – –
Limnophilic species 1 3828 – – – – – – – – – – 1 2006 – 3 4376 – 3 301 – – – –
Pike – – – – – – – – – – – – 1 2006 612 – – – – – – – – –
Perch – – – – – – – – – – – – – – – 2 226 170–220 3 301 158–216 – – –
Carp 1 3828 570 – – – – – – – – – – – – – – – – – – – – –
Leather carp – – – – – – – – – – – – – – – 1 4150 560 – – – – – –
Total 540 161476 – 266 41451 – 1333 72720 – 1201 66752 – 161 90677 – 163 31650 – 355 58566 – 488 110513 –
Species FW3-O
  2009–2010 2010–2011 2011–2012
  n g mm n g mm n g mm
Rheophilic species 381 769401 – 47 72186 – 66 159982 –
Trout 8 12301 249–624 5 4388 254–536 6 6298 362–578
Sea trout 5 10287 499–640 3 4907 472–571 2 6302 561–760
Rainbow trout 4 7688 492–581 1 2206 580 8 20991 492–635
Barbel 170 481573 102–704 13 35380 175–681 29 83956 440–689
Chub 41 60924 184–528 12 14965 373–503 16 35308 421–529
Nase 138 195456 138–512 11 7099 109–422 5 7127 364–479
Spirlin 13 66 46–91 – – – – – –
Asp – – – 1 2228 601 – – –
Grayling 2 1106 327–398 1 1013 451 – – –
Eurytopic species 497 926536,6 – 69 121606 – 313 227274 –
Common bleak – – – 3 97 133–147 – – –
Bream 479 903047 315–575 58 107943 401–550 296 27168 373–590
Silver bream 4 1587 241–276 1 261 237 – – –
Roach 9 3095 168–328 5 1809 177–300 8 1856 180–275
Gudgeon 1 24 121 – – – – – –
European catfish 4 18784 880–950 2 11496 876–1070 9 198250 920–1160
Limnophilic species 20 82480 – 1 2975 – 11 89717 –
Pike 5 12542 590–761 – – – 1 1377 555
Tench 3 4810 432–475 – – – – – –
Ide 1 426 295 – – – 1 1220 398
Common rudd 1 1528 389 – – – – – –
Koï 2 9361 521–671 – – – – – –
Carp 8 53813 540–723 1 2975 505 9 87120 674–858
Total 898 1778418 – 117 196767 – 390 476973 –

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