Historic walleye (N = 51) | “Blue pike” (N = 52) | |||
---|---|---|---|---|
Measurement | Mean ± SD | Range | Mean ± SD | Range |
Standard length (mm) | 264.3 ± 49.9 | 187 - 385 | 248.8 ± 37.7 | 202 - 362 |
% Standard length | ||||
Body depth | 20.1 ± 1.9 | 15.8 - 24.2 | 20.4 ± 2.1 | 16.3 - 24.9 |
Head length | 30.7 ± 0.8 | 28.9 - 32.2 | 30.6 ± 1.8 | 27.9 - 40.7 |
% Head length | ||||
Cheek length | 48.3 ± 1.8 | 44.3 - 52.5 | 48.4 ± 1.6 | 46.3 - 55.7 |
Upper jaw length | 38.6 ± 3.1 | 33.6 - 43.9 | 37.9 ± 3.7 | 31.0 - 44.9 |
Lower jaw length | 38.8 ± 4.1 | 30.1 - 43.7 | 38.2 ± 4.3 | 31.6 - 44.1 |
Head width | 41.6 ± 4.5 | 34.3 - 55.0 | 38.6 ± 2.5 | 32.1 - 44.0** |
Interorbital width | 14.9 ± 1.1 | 12.8 - 17.3 | 14.1 ± 1.2 | 11.2 - 17.2** |
Orbit diameter | 20.7 ± 1.8 | 17.4 - 26.4 | 21.9 ± 2.1 | 16.6 - 25.9** |
Orbit: interorbital | 1.4 ± 0.2 | 1.1 - 2.0 | 1.6 ± 0.2 | 1.0 - 2.2** |
Upper: lower jaw | 1.0 ± 0.2 | 0.8 - 1.3 | 1.0 ± 0.2 | 0.7 - 1.3 |
Meristic | Mode | Range | Mode | Range |
First dorsal fin rays | 14 | 11 - 16 | 12 | 11 - 15 |
Second dorsal fin rays | 21 | 19 - 22 | 20 | 13 - 22** |
Pectoral fin rays | 15 | 11 - 17 | 14 | 10 - 16 |
Pelvic fin rays | 6 | 5 - 8 | 7 | 5 - 8** |
Anal fin rays | 14 | 11 - 16 | 14 | 11–16 |