The Company of Biologists

Table 1.

Characteristics of experimental trout

Acclimation step	Body mass (g)	Fork length (cm)	Condition factor^¹	Hepatosomatic index^²	Number of individuals
Warm acclimation
Initial	373.4±27.1	31.9±0.8	1.12±0.04	1.41±0.10^a	15
Week 1	333.8±31.4	31.7±0.9	1.05±0.03	1.22±0.14^a,b	12
Week 2	322.7±30.5	32.4±0.8	1.03±0.04	1.11±0.07^a,b,c	12
Week 3	322.5±22.7	30.8±0.7	1.10±0.03	0.95±0.06^b,c	12
Week 4	390.4±38.8	33.3±1.0	1.04±0.04	0.85±0.14^b,c	8
Week 8	387.2±29.1	33.1±0.8	1.06±0.02	0.80±0.04^c	14
Cold acclimation
Initial	306.4±13.9^b	30.3±0.6	1.09±0.02	0.93±0.05^b	15
Week 1	305.4±18.1^b	30.5±0.5	1.07±0.03	0.95±0.05^b	12
Week 2	315.3±16.5^a,b	30.4±0.7	1.10±0.03	1.10±0.04^a,b	10
Week 6	375.2±17.2^a	32.3±0.5	1.11±0.01	1.08±0.03^b	12
Week 10	353.6±18.7^a,b	31.7±0.5	1.10±0.03	1.30±0.06^a	12

Acclimation step	Body mass (g)	Fork length (cm)	Condition factor^¹	Hepatosomatic index^²	Number of individuals
Warm acclimation
Initial	373.4±27.1	31.9±0.8	1.12±0.04	1.41±0.10^a	15
Week 1	333.8±31.4	31.7±0.9	1.05±0.03	1.22±0.14^a,b	12
Week 2	322.7±30.5	32.4±0.8	1.03±0.04	1.11±0.07^a,b,c	12
Week 3	322.5±22.7	30.8±0.7	1.10±0.03	0.95±0.06^b,c	12
Week 4	390.4±38.8	33.3±1.0	1.04±0.04	0.85±0.14^b,c	8
Week 8	387.2±29.1	33.1±0.8	1.06±0.02	0.80±0.04^c	14
Cold acclimation
Initial	306.4±13.9^b	30.3±0.6	1.09±0.02	0.93±0.05^b	15
Week 1	305.4±18.1^b	30.5±0.5	1.07±0.03	0.95±0.05^b	12
Week 2	315.3±16.5^a,b	30.4±0.7	1.10±0.03	1.10±0.04^a,b	10
Week 6	375.2±17.2^a	32.3±0.5	1.11±0.01	1.08±0.03^b	12
Week 10	353.6±18.7^a,b	31.7±0.5	1.10±0.03	1.30±0.06^a	12

Data are means ± s.e.m. and were compared between acclimation steps within each experiment. When values in a column are followed by different letters, they are significantly different (P≤0.05;ANOVA and Tukey's a posteriori test).

Condition factor = (body mass × fork length⁻³)× 100.

Hepatosomatic index = (liver mass × body mass⁻¹)× 100.

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