عواملی از قبیل صید بی رویه، کاهش ورودی آب، استفاده بیش از حد از منابع آبی جهت مصارف کشاورزی، آلودگی منابع آب و شیوع بیماری ها حیات آبزیان را تهدید می کند. بررسی فاکتورهای بیوشیمیایی سرم خون می تواند نقش مهمی در تشخیص تغییرات محیطی و بیماریهای آبزیان ایفا کند. بدین منظور در این مطالعه از تعداد 23 عدد بچه ماهی سفیدک سیستان از طریق سیاهرگ دمی نمونه خون اخذ گردید. پس از سانتریفیوژ و جداسازی سرم، سن...

background: the use of chemical materials such as malachite green to disinfect fish eggs is banned in many countries due to its reversed environmental effects. objectives: the purpose of this study was to investigate the effect of metalonic sumac extract as antifungal agent on eggs of schizothorax zarudnyi during the incubation period and to compare its effects with malachite green. methods: 24...

This study was performed to investigate the effects of feeding rates on growth performance, feed conversion and body composition of juvenile snow trout (Schizothorax zarudnyi). For this purpose, fish with an initial body weight of 2.17±0.1 g were fed a commercial diet (40% protein, 3.8 Kcal g-1 diet) at five ration sizes of 2%, 4%, 6%, 8% and 10% of their body weight per day, for 60 days. The f...

This study was performed to investigate the effects of feeding rates on growth performance, feed conversion and body composition of juvenile snow trout (Schizothorax zarudnyi). For this purpose, fish with an initial body weight of 2.17± 0.1 g were fed a commercial diet (40% protein, 3.8 Kcal/g diet) at five ration sizes 2%, 4%, 6%, 8% and 10% of their body weight per day, for 60 days. Feeding t...

abstract this study aimed to investigate the effects of different levels of the amino acid lysine on growth performance, feed efficiency and body composition of juvenile snow trout (schizothorax zarudnyi). for this purpose, 150 fish with average weight 22.51±0.28 g fed with five levels of dietary amino acid lysine including 0 (control), 7, 12, 17 and 22 g/kg diet, for 8 weeks. fish fed two time...

The genus Schizothorax (Cyprinidae), one of the most diverse genera of ichthyofauna of the Qinghai-Tibetan Plateau (QTP), is a good candidate for investigating patterns of genetic variation and evolutionary mechanisms. In this study, sequences from the mitochondrial control region, the cytochrome b gene, and two nuclear genes were used to re-examine the genetic diversity and investigate the evo...