Table 2 Difference in movement and habitat use between natal and non-natal Atlantic sturgeon in two rivers
Response variable | Delaware river | Hudson river | ||
|---|---|---|---|---|
Natal | Non-natal | Natal | Non-natal | |
Date of first detection in the river | 15 May | 17 May | 19 May | 16 May |
Date of first detection in the primary spawning reach | 19 May | 17 May | 1 June | 1 June |
Cumulative number of days spent in the primary spawning reach | 5.1 | 8.6 | 8.5 | 10.3 |
Maximum upstream migration distance (km) | 103.7 | 84.0 | 145.2 | 146.8 |
Date of outmigration | 31 May | 10 June | 28 June | 29 June |
Total number of days in the river | 16.4 | 23.9 | 40.1 | 43.8 |
Shannon longitudinal entropy | 0.45 | 0.45 | 0.52 | 0.49 |
Number of years between consecutive detections | 1.3 | 1.1 | 1.3 | 1.4 |