fa اثر متقابل دوره نوری و شدت نور بر عملکرد رشد، ایمنی و بازماندگی فیل‌ماهی Huso huso پرورشی در مرحله لاروی (تغذیه داخلی) تخصصي Special پژوهشي Research <span style="font-size:11pt"><span style="line-height:150%"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">هدف از این مطالعه، افزایش راندمان تولید فیل&shy;ماهی در مرحله لاروی (پس از تفریخ تا جذب کیسه زرده) تحت تاٌثیر متقابل دوره و شدت نور بود. در این پژوهش، لاروها از مرحله تفریخ تا جذب کامل کیسه</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">زرده در معرض تیمارهای چهارگانه شدت نور (0-10؛ 100-70؛ 200-170 و 350-330 لوکس) و پنج&shy;گانه دوره نوری (</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">D</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">00</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">L</span></span></span><span dir="LTR" style="font-size:12.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">:</span></span></span><b> </b><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">24؛</span></span></span><b> </b><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">D</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">08</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">L</span></span></span><span dir="LTR" style="font-size:12.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">:</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">16؛</span></span></span><b> </b><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">D</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">12</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">L</span></span></span><span dir="LTR" style="font-size:12.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">:</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">12؛</span></span></span><b> </b><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">D</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">16</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">L</span></span></span><span dir="LTR" style="font-size:12.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">:</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">08و</span></span></span><b> </b><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">D</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">24</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">L</span></span></span><span dir="LTR" style="font-size:12.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">:</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">00)</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">و نیز گروه شاهد قرار گرفتند. هر تیمار و گروه شاهد دارای سه تکرار (70 گرم لارو) بود. در پایان آزمایش پس از نمونه&shy;برداری و زیست&shy;سنجی نمونه&shy;ها، فاکتورهای رشد</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">شامل وزن و طول نهایی، وزن کسب شده </span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">WG</span></span></span> <span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%">(</span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Weight Gain</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%">)</span></span><span lang="AR-SA" style="font-size:12.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">،</span></span></span><b> </b><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">ضریب رشد ویژه</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">SGR</span></span></span><b> </b><b>&nbsp;</b><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">(</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%">(</span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Specific growth rate</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">، ضریب چاقی</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">CF</span></span></span><b> </b><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%">(</span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Condition factor</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%">)</span></span><b><span b="" lang="AR-SA" lotus="" style="font-family:"><span style="color:black">،</span></span></b> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">درصد افزایش</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">وزن بدن</span></span></span><b> </b><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">BWI</span></span></span><b> </b><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">(</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%">(</span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Body weight increase</span></span></span><span lang="FA" style="font-size:14.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">، </span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">رشد روزانه</span></span></span> <span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">ADG</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">(</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Daily growth</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">)</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">درصد زنده&shy;مانی</span></span></span><b> </b><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">SR</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">(</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Survival rate</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">) با</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">استفاده از روابط ریاضی خاص انجام شد. همچنین برخی از فاکتورهای آنزیمی، ایمنی و بیوشیمیایی پلاسمای بدن نیز اندازه&shy;گیری و مورد تجزیه و تحلیل آماری قرار گرفت. نتایج نشان داد اگرچه همه شاخص&shy;های رشد (وزن، ضریب چاقی، درصد رشد ویژه، درصد افزایش وزن، رشد روزانه و وزن بدست آمده) در تیمار با دوره نوری 24 ساعت روشنایی و شدت نور 100 لوکس (05/0</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">p<</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">)</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">در بیشینه وضعیت رشدی بودند، اما بیشینه درصد زنده&shy;مانی لاروها با اختلاف معنی&shy;دار (05/0</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">p</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><</span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">) (32/%65) نسبت به سایر تیمارها به ویژه تیمار بیشینه رشد (با بازماندگی 41%7)، در تیمار 8 ساعت روشنایی و 16 ساعت تاریکی با شدت نور 100 لوکس مشاهده شد. شاخص&shy;های آنزیمی، بیوشیمیایی و ایمنی نیز در لاروهای تیمار رشد بهینه (تیمار 11) نسبت به بسیاری از تیمارهای آزمایشی در وضیت مطلوب قرار داشتند</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">(05/0</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">p<</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">)</span></span></span><span lang="FA" style="font-size:14.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">. </span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:150%"><span b="" nazanin="" style="font-family:">در مجموع، مناسب&shy;ترین دوره نوری و شدت نور برای افزایش راندمان تولید لارو دارای کیسه زرده فیل&shy;ماهی پرورشی، تیمار 8 ساعت روشنایی و 16 ساعت تاریکی با شدت نور 100 لوکس بود. </span></span></span></span></span></span></span></span><br> &nbsp; <span style="font-size:11pt"><span style="line-height:18.0pt"><span calibri="" style="font-family:"><span lang="EN" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">The aim of this study was to increase the production efficiency of reared Great sturgeon (<i>Huso huso</i>) in the larval stage (after hatching until absorption of the yolk sac) under the corresponding influence of photoperiod and light intensity. In this study, the larvae from the after hatching to the complete absorption of the yolk sac were exposed to four light intensities (0-10; 70-100; 200-170 and 350-330lux) and five photoperiods (24L:00D; 16L:08D; 12L:12D; 08L: 16D and 00L: 24D) treatments and the control group. Each treatment and control group had three replications (70 g of larvae). At the end of the experiment, after sampling and biometry of the samples, growth factors including weight and final length, weight gain (WG), specific growth rate (SGR), condition factor (CF), body weight increase (BWI), daily growth (ADG) and survival rate (SR) were done using special mathematical </span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">formula</span></span><span lang="EN" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">. Also, some enzymatic, immune and biochemical factors of body plasma were measured and analyzed statistically. The results showed that although all growth indices (WG, SGR, CF, BWI and ADG) in the treatment of photoperiod of 24L:00D and light intensity of 100lux were in the maximum growth (p<0.</span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">0</span></span><span lang="EN" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">5), but the maximum survival percentage of larvae (65.32%) compared to other treatments, especially the maximum growth treatment (7.41%), was observed in the photoperiod of 08L:16D and light intensity of 100lux treatment (p<0.05). Also, enzymatic, biochemical and immune indices were desirable conditions in the larvae of optimal growth treatment (treatment 11) compared to many other treatments (p<0.05). In total, the most suitable photoperiod and light intensity to increase the production efficiency of larvae with a yolk sac of reared great sturgeon, was the treatment of 08L:16D and 100lux.</span></span></span></span></span><br> &nbsp; لارو فیل‌ماهی, نور, رشد و بازماندگی, راندمان تولید Huso huso larvae, light, growth and survival, production efficiency 51 60 http://jair.gonbad.ac.ir/browse.php?a_code=A-10-184-5&slc_lang=fa&sid=1 Rezvanollah Kazemi رضوان اله کاظمی Rezkazemi2000@yahoo.com 10031947532846007602 10031947532846007602 Yes International Sturgeon Research Institute انستیتو تحقیقات بین المللی ماهیان خاویاری Mohsen Kazemi محسن کاظمی mohsenkazemi660@gmail.com 10031947532846007603 10031947532846007603 No Shahid Chamran University دانشگاه شهید چمران اهواز Takavar Mohammadian تکاور محمدیان tak.mohammadian@gmail.com 10031947532846007604 10031947532846007604 No Shahid Chamran University دانشگاه شهید چمران اهواز Mehrzad Mesbah مهرزاد مصباح m.mesbah@scu.ac.ir 10031947532846007605 10031947532846007605 No Shahid Chamran University دانشگاه شهید چمران اهواز