Table 1 Averaged characteristics of time series and status (native vs. non-native to the European continent) of reported crayfish species occurrences (counts) and the lag time in reporting (i.e., the average years between the onset of time series and the first native or non-native crayfish being recorded)
From: Are long-term biomonitoring efforts overlooking crayfish in European rivers?
Species | Status | Avg. time series duration (in years) | Avg. samplings per time series (in years) | Avg. number of records per time series | Avg. abundance per occurrence | Avg. period of records | Lag time |
|---|---|---|---|---|---|---|---|
Overall |  | 20.1 ± 8.4 | 15.5 ± 6.35 | 2.63 | 3.64 | 1980–2019 | 2.75 |
Astacus astacus | Native | 10.4 ± 0.5 | 10 ± 0 | 0.46 | 8.80 | 1980–2015 | 8.60 |
Astropotamobius torrentium | Native | 21.4 ± 9.9 | 11.5 ± 0.7 | 1 | 1.70 | 2008–2011 | 17.50 |
Astropotamobius pallipes | Native | 21.4 ± 2.4 | 15.3 ± 3.90 | 2.8 | 1.78 | 1994–2019 | 3.8 |
Pontastacus leptodactylus | Native | 11.2 ± 1.2 | 10.3 ± 1.2 | 0.88 | 2.80 | 2005–2017 | 5.70 |
Faxonius limosus | Non-native | 24.2 ± 9.4 | 16.2 ± 7 | 2.13 | 2.79 | 1983–2019 | 0.63 |
Pacifastacus leniusculus | Non-native | 25.1 ± 1.9 | 24.2 ± 5.4 | 3.00 | 7.14 | 1995–2011 | 8.62 |
Procambarus clarkii | Non-native | 25 ± 1.8 | 24.4 ± 4.2 | 3.73 | 10.23 | 1994–2018 | 12.40 |