Changes in fish resources 5 years after implementation of the 10-year fishing ban in the Chishui River, the first river with a complete fishing ban in the Yangtze River Basin

Ecological Processes

Table 6 Mean standard length and mean body weight of the main dominant species before and after the implementation of the fishing ban in the Chishui River

Species	Mean standard length ± SD (mm)		W test	KS test	Mean body weight ± SD (g)		W test	KS test
Species	Pre-	Post-	W test	KS test	Pre-	Post-	W test	KS test
S. grahami	116.9 ± 65.0	150.6 ± 54.3	< 0.05	< 0.05	57.8 ± 124.7	82.3 ± 135.8	< 0.05	< 0.05
A. yunnanensis	123.1 ± 33.6	143.3 ± 37.0	< 0.05	< 0.05	42.1 ± 41.7	68.9 ± 60.3	< 0.05	< 0.05
G. imberba	152.8 ± 38.2	177.9 ± 44.6	< 0.05	< 0.05	76.9 ± 54.4	126.6 ± 99.5	< 0.05	< 0.05
P. procheilus	126.0 ± 33.1	131.2 ± 25.7	> 0.05	< 0.05	49.4 ± 43.2	52.2 ± 34.1	> 0.05	< 0.05
H. labeo	141.6 ± 31.5	140.5 ± 36.6	< 0.05	< 0.05	56.7 ± 39.6	56.8 ± 41.2	< 0.05	< 0.05
S. sinensis	193.1 ± 82.8	224.6 ± 86.9	< 0.05	< 0.05	294.1 ± 327.7	451.9 ± 491.2	< 0.05	< 0.05
P. vachelli	158.6 ± 50.2	165.5 ± 44.9	> 0.05	< 0.05	81.4 ± 88.1	77.0 ± 72.6	< 0.05	< 0.05
M. macropterus	174.6 ± 52.8	207.1 ± 53.5	< 0.05	< 0.05	58.8 ± 46.5	91.1 ± 57.9	< 0.05	< 0.05
L. crassilabris	127.9 ± 34.9	156.2 ± 40.1	< 0.05	< 0.05	40.5 ± 29.7	61.7 ± 37.9	< 0.05	< 0.05
P. rabaudi	130.1 ± 66.5	153.2 ± 68.8	< 0.05	< 0.05	109.3 ± 187.4	149.1 ± 227.3	< 0.05	< 0.05

The results of Wilcoxon signed-rank test (W test) and Kolmogorov–Smirnov test (KS test) are presented for comparison before and after the fishing ban. Bold type denotes a significant difference