The Company of Biologists

Table 3.

A matrix of Spearman rank correlation coefficients among parameters

	Number of dives	Swim speed (N=84 dives)	Body angle (N=137 dives)^{^a}	Stroke frequency (N=179 dives)
Descent
Descent time	179	-0.04	-0.584^***	-0.081
Swim speed	84		0.591^***	-0.668^***
Body angle	137^{^a}			-0.484^***
Ascent
Ascent time	179	-0.007	-0.347^***	-0.354^***
Swim speed	84		0.216	0.669^***
Body angle	137			0.576^***

	Number of dives	Swim speed (N=84 dives)	Body angle (N=137 dives)^{^a}	Stroke frequency (N=179 dives)
Descent
Descent time	179	-0.04	-0.584^***	-0.081
Swim speed	84		0.591^***	-0.668^***
Body angle	137^{^a}			-0.484^***
Ascent
Ascent time	179	-0.007	-0.347^***	-0.354^***
Swim speed	84		0.216	0.669^***
Body angle	137			0.576^***

^a

Body angle is negative when descending. The absolute value was used for statistical test.

P<0.0001.