@article { author = {Forouhar Vajargah, Mohammad and Hedayati, Seyed Ali Akbar and Hassan Nataje Niazie, Elaheh and Hajiahmadian, Michael}, title = {Effects of different light colors on growth indices and survival rate in Tiger barb (Barbus tetazone) Juvenile}, journal = {Aquatic Physiology and Biotechnology}, volume = {2}, number = {1}, pages = {25-40}, year = {2014}, publisher = {University of Guilan}, issn = {2345-3966}, eissn = {2538-5429}, doi = {}, abstract = {Light is one of the important and effective environmental factors in fish life that can affect body activity and metabolism. Present study was done to study the effects of different light colors on growth indices (Growth Rate, Specific Growth Rate and Condition Factor), Feed Conversion Ratio and Survival Rate in tiger barb (Barbus tetazone) juvenile for 6 weeks. To examine, 120 fish juvenile with average weight of 0.073±0.002 g were respectively divided in to four groups treatments including white, natural, green and blue colors (with three replicates for each treatment). Fish were fed by Biomar commercial food twice a day. Results showed that growth indices (GR, SGR) and FCR had significant difference in different light colors (P˂0.05). White and green lights, respectively, led to the highest and lowest GR and SGR in fish, however, there were similar effects of white and blue lights on growth and also green and natural lights on growth. The best feed conversion ratio was observed in natural light and there were no significant difference between other treatments. In addition, the highest condition factor was related to white and blue colors and the lowest condition factor was associated to green and natural colors. Survival rate showed no significant difference in different treatments (P>0.05). Results of present study showed environment light color can significantly affect juvenile growth of tiger barb. Therefore by using suitable light color an optimum growth could be obtained culture period.}, keywords = {Fish Juvenile,Light Color,Growth indices}, title_fa = {تاثیر نورهای رنگی بر شاخصهای رشد و بازماندگی بچه ماهی نورس تایگر بارب(Barbus tetazone)}, abstract_fa = {نور یکی از فاکتورهای محیطی موثر در زندگی ماهیان به شمار میرود که روی فعالیت و متابولیسم بدن آنها تاثیر میگذارد. این پژوهش به مدت 6 هفته به منظور مطالعه اثرات رنگهای مختلف نور بر شاخصهای انجام گرفت. به این (Barbus tetazone) رشد، ضریب تبدیل غذایی و نرخ بازماندگی بچه ماهی تایگر بارب 0 میلیگرم) به ترتیب در چهار / 0 گرم ( 73 /073±0/ منظور، 120 عدد بچه ماهی نورس با متوسط وزن 002 تیمار نوری سفید، طبیعی، آبی و سبز (با 3 تکرار برای هر تیمار) قرار گرفتند. تغذیه ماهیان روزانه دو بار و با استفاده از غذای تجاری بیومار انجام شد. نتایج نشان دادند که شاخصهای رشد (نرخ رشد و نرخ رشد ویژه) و نور سفید و سبز به ترتیب منجر .(P0/ تیمارهای مختلف اختلاف معنیداری را نشان نداد ( 05 میتواند تاثیر معنیداری روی رشد بچه ماهی تایگر بارب داشته باشد. بنابراین با استفاده از رنگ نور مناسب در طول دوره پرورش میتوان به رشد بهینه در این ماهیان دست یافت.}, keywords_fa = {Fish Juvenile,Light Color,Growth indices}, url = {https://japb.guilan.ac.ir/article_565.html}, eprint = {https://japb.guilan.ac.ir/article_565_45afaae73c148269365fc40bddb37975.pdf} }