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Figure 2

From: 11-Deoxycortisol controls hydromineral balance in the most basal osmoregulating vertebrate, sea lamprey (Petromyzon marinus)

Figure 2

Osmoregulatory and endocrine changes during sea lamprey metamorphosis. (A–C) Changes in gill NKA activity (n = 8–12; PLS,MO,INT < 0.001), plasma 11-deoxycortisol concentration ([S]) (n = 8–12; PLS,MO,INT < 0.01), and gill CR abundance (Bmax) (n = 3; PINT < 0.01) during sea lamprey metamorphosis. Values represent mean ± SEM, letters indicate differences among metamorphic lamprey (blue), and asterisks indicate differences from time-matched larvae (white) (two-way ANOVA; Tukey’s post hoc; LS, life stage; MO, month; INT, interaction). (D) Dissociation constant (Kd) from larvae and metamorphic individuals (unpaired t test: P = 0.817; n = 12). Horizontal lines indicate mean ± SEM. (E,F) Relationships between gill NKA activity and plasma [S] (hyperbolic) and gill CR abundance (Bmax) (linear; P < 0.001) in metamorphic sea lamprey. Dotted lines represent 95% confidence bands.

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