. 2016 Feb 6;4(1):cov064. doi: 10.1093/conphys/cov064

Table 3:

Muscle concentrations of Na⁺ and K⁺ (in millimoles per gram wet mass), percentage water and Na⁺:K⁺ ratio and the intestinal fluid Cl⁻ concentration (millimolar) in long-term freshwater (FW)-acclimated sea lampreys challenged in FW (n = 4), 17.5 brackish water (BW-17.5; n = 4) and short-term FW-acclimated sea lampreys challenged in FW (n = 6), BW-17.5 brackish water (n = 6), and 25 brackish water (BW-25) osmoregulators and BW-25 osmocompromised animals (n = 4)

FW acclimation	Group	Muscle				Intestinal fluid
		[Na⁺]	[K⁺]	Water content	Na⁺:K⁺ ratio	[Cl⁻]
Long term	FW	23.8 ± 5.1^a	85.2 ± 17.4^a	77.1 ± 0.4	0.28 ± 0.01^a	114.8 ± 0.1^a
Long term	BW-17.5	889.0 ± 13.4^b	179.2 ± 30.2^b	75.3 ± 0.9	0.51 ± 0.07^b	243.5 ± 2.0^b
Short term	FW	58.6 ± 8.7^ab	93.0 ± 8.1^a	74.4 ± 1.4^a	0.63 ± 0.07	117.9 ± 28.7^a
	BW-17.5	42.3 ± 4.8^ab	56.9 ± 5.2^b	68.9 ± 1.0^b	0.74 ± 0.02	109.7 ± 9.5^a
	BW-25 osmoregulating	36.4 ± 5.0^b	73.2 ± 5.7^ab	63.9 ± 0.6^c	0.50 ± 0.06	121.4 ± 5.1^a
	BW-25 osmocompromised	73.9 ± 5.4^ac	93.8 ± 12.3^a	62.1 ± 0.8^c	0.84 ± 0.14	233.9 ± 26.9^b

Values are shown as means ± SEM. Within each experiment, groups that do not share letters are significantly different (P < 0.05).