| ถิ่นที่อยู่: |
ปี: from - to |
เพศ: | เครื่องมือ: | ประเภทความถี่: | |||
| Pilcomayo river, Bolivia | 1970 - 1970 | females | traps | absolute number measured | |||
| Pilcomayo river, Bolivia | 1970 - 1970 | males | traps | absolute number measured | |||
| Paraná River (middle), Argentina | 1976 - 2003 | unsexed/mixed | other | absolute number measured | |||
| Yacyretá dam (upper Paraná river), Argentina | 1995 - 1997 | unsexed/mixed | other | absolute number measured | |||
| Yacyretá dam (upper Paraná river), Argentina | 1995 - 1997 | unsexed/mixed | other | absolute number measured | |||