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Table 1

Geographical location and environmental characteristics in the lakes of the upper Paraná River floodplain. Ivinhema (I), Baía (B), Paraná (P), water temperature (WT), hydrogen potential (pH), electrical conductivity (EC) and dissolved oxygen (DO).

Locality name S′ S″ W′ W″ Lake River system WT (°C) pH EC (μS cm−1) DO (mg L−1)
1. Boca do Ipoitã 22 50 12.8 53 33 55.5 Connected I 21.1 6.0 37 2.7
2. Patos 22 49 38.4 53 33 19.6 Connected I 21 5.7 37 3.4
3. Sumida 22 47 2.2 53 29 12.5 Connected I 20.9 5.9 32.8 4.9
4. Capivara 22 48 15.2 53 32 14.4 Isolated I 21.5 5.3 36.1 1.9
5. Jacaré 22 47 12.9 53 30 5.9 Isolated I 21.4 5.9 29.9 4.0
6. Cervo 22 46 51 53 30 1.5 Isolated I 21.5 5.6 44.7 1.7
7. Onça 22 39 49.2 53 11 56.8 Connected B 23.9 6.0 39.1 0.6
8. Porcos 22 42 23.6 53 14 49.7 Connected B 24.6 6.5 23.1 7.9
9. Guaraná 22 43 25.8 53 18 1.3 Connected B 23.3 5.8 31.8 1.4
10. Sete Figueira 22 43 49.7 53 18 1.9 Isolated B 22.4 5.7 79.5 0.2
11. Bom Futuro 22 42 7.9 53 14 51.4 Isolated B 23.1 5.9 26 3.4
12. V 22 38 18.1 53 10 37.4 Isolated B 24.7 6.3 24.4 7.3
13. Manezinho 22 46 53.3 53 20 56.2 Connected P 22 6.7 53.3 7.7
14. Bilé 22 45 16.1 53 16 59.1 Connected P 22 6.6 52.4 7.1
15. Leopoldo 22 45 27.8 53 16 3 Connected P 21.7 6.3 53.6 5.8
16. Bambu 22 45 20 53 15 42.5 Isolated P 22.1 6.9 50 0.2
17. Sapateiro 22 45 48.2 53 17 9.8 Isolated P 21.4 6.1 49.3 0.2
18. Cutia 22 46 27.5 53 19 15.7 Isolated P 20.9 5.8 124.4 0.1

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