Table 4. Results of linear regression analysis that tested the significance of the amount of calling and sound pressure level in relation to spawning success of spotted seatrout (Cynoscion nebulosus) held in captivity.
Tank | Independent variable | Fitted equation | r2 | P | df |
---|---|---|---|---|---|
Tank 1 | Total no. of calls | y = 402x − 104,522 | 0.208 | <0.001 | 243 |
Tank 1a | Total no. of callsa | y = 246x + 530,897a | 0.043a | 0.062a | 79a |
Tank 1 | Mean SPL | y = 74,752x − 8,745,163 | 0.245 | <0.001 | 243 |
Tank 1a | Mean SPLa | y = 74,494x − 8,315,774a | 0.136a | 0.001a | 79a |
Tank 2 | Total no. of calls | y = 235x − 77,917 | 0.065 | <0.001 | 220 |
Tank 2a | Total no. of callsa | y = 714x − 180,228a | 0.015a | 0.687a | 11a |
Tank 2 | Mean SPL | y = 36,452x − 4,193,465 | 0.046 | 0.001 | 220 |
Tank 2a | Mean SPLa | y = 230,218x − 26,911,981a | 0.048a | 0.470a | 11a |
Tank 3 | Total no. of calls | y = 689x + 35,106 | 0.398 | 0.003 | 220 |
Tank 3a | Total no. of callsa | y = 2,052x − 506,339a | 0.964a | 0.122a | 1a |
Tank 3 | Mean SPL | y = 31,294x − 3,533,082 | 0.112 | <0.001 | 220 |
Tank 3a | Mean SPLa | y = 250,379x − 28,201,967a | 0.997a | 0.036a | 1a |
Notes.
SPL, received sound pressure level in dB re 1 µPa.
Separate linear regression analysis was performed and did not include non-spawning events (i.e., when eggs collected were equal to 0).