Table 1
Sterilisation methods (abbreviations in parentheses) for male signal crayfish Pacifastacus leniusculus in captive conditions and the mean lengths of both males and females used subsequently in their copulation trials.
| Mean carapace length in trials (mm) | |||||
|---|---|---|---|---|---|
| Group | Sterilisation method | n | Sampling date(s) | Female | Male |
| 1 | Not sterilised (control/CTRL) | 24 | Sept. 2019 | 42.2 ± 2.6 | 43.5 ± 3.0 |
| 2 | Cutting whole gonopods (cut/CWG) | 24 | Sept. 2019 | 41.8 ± 1.4 | 42.8 ± 1.6 |
| 3 | Pulling whole gonopods (pulled/PWG) | 24 | Sept. 2019 | 41.8 ± 1.0 | 42.5 ± 1.0 |
| 4 | One year regeneration (trimmed once/R1T1) | 12 | Sept. 2018 | 43.8 ± 3.7 | 49.5 ± 1.2 |
| 5 | One year regeneration (trimmed twice/R1T2) | 7 | Sept. 2016 (n = 2) Sept. 2017 (n = 5) | 45.8 ± 8.5 | 51.7 ± 9.1 |
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