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 3 Mean values of the three diversity indices (Mean ± SD), Margalef richness index (D), Shannon–Wiener diversity index (H’) and Pielou evenness index (J’), before and after the implementation of the fishing ban for the four study reaches, Potou Town (PT), Chishui Town (CZ), Chishui City (CS) and Hejiang County (HJ), in the Chishui River

Indices	PT		P	CZ		P	CS		P	HJ		P
Indices	Pre-	Post-	P	Pre-	Post-	P	Pre-	Post-	P	Pre-	Post-	P
D	2.17 ± 0.22	2.22 ± 0.32	> 0.05	3.69 ± 0.09	3.85 ± 0.58	> 0.05	5.47 ± 0.56	5.53 ± 0.58	> 0.05	7.76 ± 0.33	7.06 ± 1.28	> 0.05
H’	1.77 ± 0.10	1.81 ± 0.09	> 0.05	2.41 ± 0.11	2.25 ± 0.17	> 0.05	2.60 ± 0.07	2.58 ± 0.20	> 0.05	2.68 ± 0.37	2.76 ± 0.15	> 0.05
J’	0.63 ± 0.04	0.68 ± 0.07	> 0.05	0.72 ± 0.04	0.67 ± 0.04	> 0.05	0.67 ± 0.03	0.67 ± 0.04	> 0.05	0.63 ± 0.09	0.66 ± 0.03	> 0.05

The results of nonparametric Wilcoxon signed-rank test are presented for comparison before and after the fishing ban