Efficiency of advanced wastewater treatment technologies for the reduction of hormonal activity in effluents and connected surface water bodies by means of vitellogenin analyses in rainbow trout (Oncorhynchus mykiss) and brown trout (Salmo trutta f. fario)

Environmental Sciences Europe

Table 2 Significant differences in weights of rainbow trout

Year	Treatment group	p value
Females
2013	Neg. control 2013—additional treatment WWTP Eriskirch 2013	0.041
2013	Neg. control 2013—upstream WWTP Langwiese 2013	0.0080
2014	Downstream WWTP Langwiese 2014—bypass Schussen 2014	0.0465
2013 vs 2014	Neg. control 2013—upstream WWTP Langwiese 2014	0.0372
	Neg. control 2013—downstream WWTP Langwiese 2014	0.0081
	Upstream WWTP Langwiese 2013—additional treatment WWTP Eriskirch 2014	0.0092
	Upstream WWTP Langwiese 2013—effluent WWTP Eriskirch 2014	0.0451
	Upstream WWTP Langwiese 2013—neg. control 2014	0.035
	Upstream WWTP Langwiese 2013—bypass Schussen 2014	0.035
	Neg. control 2013—bypass Argen 2014	0.041
	Additional treatment WWTP Eriskirch 2013—upstream WWTP Langwiese 2014	0.0407
	Additional treatment WWTP Eriskirch 2013—downstream WWTP Langwiese 2014	0.0139
Males
2014	Neg. control 2014—downstream WWTP Langwiese 2014	0.0138
	Additional treatment WWTP Eriskirch 2014—upstream WWTP Langwiese 2014	0.0411
	Additional treatment WWTP Eriskirch 2014—downstream WWTP Langwiese 2014	0.0299
	Bypass Schussen 2014—downstream WWTP Langwiese 2014	0.0076
	Bypass Schussen 2014—upstream WWTP Langwiese 2014	0.0201
2013 vs 2014	Bypass Schussen 2013—bypass Schussen 2014	0.0331

Data were logarithmised to get homoscedastic data and the Steel–Dwass test revealed the following p values