Table 1.

Mean (±s.e.) weight and fork length of juvenile brown trout in six treatment groups (H, HS, M, MS, L and LS) in the hatchery and after release and recapture in a stream. Fish were released in the stream on 20 September and recaptured on 25 October.

	H	HS	M	MS	L	LS
hatchery	n = 150	n = 150	n = 150	n = 150	n = 150	n = 150
13 June
weight (g)	2.07 ± 0.04	2.24 ± 0.04	1.83 ± 0.04	2.17 ± 0.04	1.73 ± 0.04	1.87 ± 0.04
fork length (mm)	57.0 ± 0.34	58.4 ± 0.34	55.2 ± 0.33	58.1 ± 0.33	54.0 ± 0.34	55.1 ± 0.33
20 September
weight (g)	12.1 ± 0.09	11.9 ± 0.06	12.0 ± 0.09	13.6 ± 0.10	13.07 ± 0.11	14.1 ± 0.11
fork length (mm)	99.7 ± 0.24	100.4 ± 0.16	100.1 ± 0.24	104.9 ± 0.23	101.7 ± 0.23	105.7 ± 0.27
21 October
weight (g)	16.9 ± 0.54	16.7 ± 0.60	17.22 ± 0.54	18.9 ± 0.54	19.1 ± 0.54	18.2 ± 0.54
fork length (mm)	112.0 ± 1.05	111.7 ± 1.16	112.8 ± 1.03	117.1 ± 1.02	115.2 ± 1.06	116.4 ± 1.02
stream	n = 3	n = 5	n = 8	n = 5	n = 7	n = 10
25 October
weight (g)	15.8 ± 0.24	15.3 ± 0.39	14.01 ± 0.54	20.6 ± 0.61	16.2 ± 0.42	16.8 ± 0.42
fork length (mm)	111.3 ± 1.07	112.8 ± 0.75	108.6 ± 1.22	127.0 ± 1.21	113.9 ± 0.85	116.0 ± 1.04