Effect of Water Velocity on the Timing of Skeletogenesis in the Arctic Charr, Salvelinus alpinus (Salmoniformes: Teleostei): An Empirical Case of Developmental Plasticity

Table 2

Spearman rank correlation for the three median fins of Salvelinus alpinus reared under two treatments of water velocity (treatments S and F). 𝑛 is the number of coded elements for which the time of appearance was available for both treatments (less than 90 days). 𝑃 is the probability associated with a 𝑟_s.

		Treatment F
		Caudal		Dorsal		Anal
Treatment S		Chondrification	Ossification	Chondrification	Ossification	Chondrification	Ossification
Caudal	Chondrification	0.82344	0.62800
		(𝑛=18; 𝑃<.0001)	(𝑛=17; 𝑃=.0069)
	Ossification	0.60878	0.95739
		(𝑛=16; 𝑃=.0123)	(𝑛=22; 𝑃<.0001)
Dorsal	Chondrification			0.95808	0.52093
				(𝑛=25; 𝑃<.0001)	(𝑛=12; 𝑃=.0825)
	Ossification			0.53685	0.90191
				(𝑛=12; 𝑃=.0719)	(𝑛=12; 𝑃<.0001)
Anal	Chondrification					0.84468	0.54617
						(𝑛=22; 𝑃<.0001)	(𝑛=10; 𝑃=.1024)
	Ossification					0.88454	0.79772
						(𝑛=10; 𝑃=.0007)	(𝑛=10; 𝑃=.0057)