fa تخصصي Special پژوهشي Research <span style="font-size:11pt"><span style="line-height:120%"><span style="text-autospace:none"><span sans-serif="" style="font-family:Calibri,"><span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">In this study, the effects of different concentrations (0, 5, 10, 25, and 40</span></span></span><span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times=""> &mu;g L</span></span></span>^{<span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">&minus;</span></span></span>}^{<span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">1</span></span></span>}<span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">) of nonylphenol (NP) for 90 days on the physiological and reproductive parameters </span></span></span><span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">in juveniles of</span></span></span> <span lang="TR" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">rainbow trout </span></span></span><span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">were investigated.</span></span></span> <span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">In the group exposed to 40 </span></span></span><span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">&mu;g L</span></span></span>^{<span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">&minus;</span></span></span>}^{<span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">1</span></span></span>}<span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times=""> of NP, plasma concentrations of </span></span></span><span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">17&beta;-estradiol (E2) and 11- ketotestosterone (11-KT)</span></span></span><span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times=""> were significantly lower on days 45 and 90 of the experiment in comparison to the control group.</span></span></span> <span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">With the increase of NP concentration in the environment, plasma concentrations of cortisol were increased on days 45 and 90 of the experiment.</span></span></span> <span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">At the end of the experiment, in the groups which were exposed to 25 or 40 </span></span></span><span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">&mu;g L</span></span></span>^{<span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">&minus;</span></span></span>}^{<span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">1 </span></span></span>}<span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">of NP, gonadosomatic index (GSI) and hepatosomatic index (HSI) were decreased and increased respectively, compared to the control group.</span></span></span> <span lang="EN" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">The results of the recent study confirm the disruption of the endocrine and metabolic organs in rainbow trout exposed to NP in the early stages of growth.</span></span></span><span style="font-size:12.0pt"><span style="line-height:120%"><span style="font-family:"Times New Roman","serif""></span></span></span></span></span></span></span><br> &nbsp; Nonylphenol, Reproduction, Metabolism, Rainbow trout 53 59 http://injvr.com/browse.php?a_code=A-10-1-11&slc_lang=fa&sid=1 H. Kohsari 1003194753284600413 1003194753284600413 Yes Department of Veterinary, Agriculture Faculty, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran.