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. 2017 Feb 9;5:e2944. doi: 10.7717/peerj.2944

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.

In all cases, the dependent variable is the number of eggs collected. P-values were statistically significant when P <0.050.

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.

a

Separate linear regression analysis was performed and did not include non-spawning events (i.e., when eggs collected were equal to 0).