Research Article: The effect of Letrozole and Letrozole-Chitosan nanoparticles on masculinization of Rainbow trout larvae (Oncorhynchus mykiss)

Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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JR_JIFRO-21-6_003

تاریخ نمایه سازی: 10 اسفند 1401

Abstract:

This study aimed to investigate the efficiency of conjugating chitosan nanoparticles to letrozole (LET) on masculinization of rainbow trout larvae, Oncorhynchus mykiss. For this purpose, two treatments of LET, ۱.۵ and ۳ mg/kg food, and two treatments of letrozole-chitosan nanoparticles (LET-CS), ۰.۵ and ۱.۵ mg/kg were performed with a control group. Treatments began immediately after active larval swimming and continued for ۶۰ days. The results showed that the amount of testosterone during the trial increased significantly (p<۰.۰۵), so that the highest amount of testosterone was observed in ۳ mg/kg LET and ۱.۵ mg/kg LET-CS. However, estradiol was untraceable in all treatments. About ۶۶.۶, ۷۳.۳۳, ۷۳.۳۳, ۷۶.۶۶ and ۴۳.۳۳% males were observed in ۱.۵ mg/kg LET, ۳ mg/kg LET, ۰.۵ mg/kg LET-CS, ۱.۵ mg/kg LET-CS and control, respectively. Despite the drug dosage in LET-CS treatments was half that of LET treatments, the sex ratio did not change among treatments (p≥ ۰.۰۵), which showed a positive effect of CS in effectiveness of LET. In general, it can be stated that using CS for the administration of LET could be effective in inhibiting the production of estradiol, increasing the amount of testosterone, and thus changing the sex ratio of rainbow trout.

Authors

H. Alijani

Department of Fisheries, Faculty of Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran

M. Amini Chermahini

Behbahan Khatam Alanbia University of Technology

D. Zargham

Iranian Fisheries Science Research Institute

M. Mohiseni

Lorestan University

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