Fig. 4. Post-injection time course for the incorporation of radiolabelled phenylalanine into protein in A. ocellatus during normoxia (closed circles) and severe hypoxia (open circles). (A) Liver (y=0.47x+0.62, r²=0.60, P_r=0.05, P_y=0.22; y=0.44x–0.22, r²=0.80, P_r=0.003, P_y=0.39); (B) brain (y=0.82x–0.05, r²=0.92, P_r=2.35x10^–5, P_y=0.84; y=0.57x+0.07, r²=0.95, P_r=2.97x10^–6, P_y=0.61); (C) heart (y=0.94x+0.20, r²=0.80, P_r=0.005, P_y=0.71; y=0.55x–0.16, r²=0.84, P_r=6.78x10^–4, P_y=0.53); (D) gill (y=2.34–0.24, r²=0.93, P_r=1.56x10^–5, P_y=0.72; y=1.05x+0.21, r²=0.68, P_r=0.015, P_y=0.79). For each tissue regression equations refer to normoxic and hypoxic fish, respectively. All r² values are significant (P_r<0.05), all y-intercept values are not significant from zero (P_y>0.05). Values are means ± s.e.m., N=4, except for hypoxia-exposed liver 2 h sample, where N=3. White muscle not shown because rates of incorporation were not detectable.