Interaction effect of photoperiod and light intensity on the growth performance, immune and survival of Great sturgeon, Huso huso reared in the larval stage (endo genus)

Article Type:
Research/Original Article (دارای رتبه معتبر)

The aim of this study was to increase the production efficiency of reared Great sturgeon (Huso huso) 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 formula. 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<0.05), 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.

Journal of Applied Ichthyological Research, Volume:10 Issue: 4, 2023
48 to 57  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 1,390,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
دسترسی سراسری کاربران دانشگاه پیام نور!
اعضای هیئت علمی و دانشجویان دانشگاه پیام نور در سراسر کشور، در صورت ثبت نام با ایمیل دانشگاهی، تا پایان فروردین ماه 1403 به مقالات سایت دسترسی خواهند داشت!
In order to view content subscription is required

Personal subscription
Subscribe for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!