آرش اکبرزاده

استادیار گروه شیلات، دانشکده علوم و فنون دریایی، دانشگاه هرمزگان، بندرعباس، ایران

[ 1 ] - اثر دو نوع رقیق کننده بر شاخص‌های تحرک اسپرم ماهی بستر (Huso huso♀×Acipenser ruthenus♂) طی نگهداری بلندمدت

نگهداری طولانی مدت اسپرم از جمله راهکارهای مدیریتی استفاده از سلول‌های جنسی در تکثیر مصنوعی ماهیان است. ماهی بستر یکی از بهترین گزینه‌های آبزی‌پر‌‌وری ماهیان خاویاری است که تاکنون بر روی انجماد اسپرم آن مطالعه‌ای صورت نگرفته است. در مطالعه حاضر، تغییرات ویژگی‌های تحرک اسپرم ماهی خاویاری بستر پس یک سال نگهداری با دو رقیق کننده، مورد بررسی قرار گرفت. میانگین درصد تحرک، مدت زمان تحرک و VSL برای رق...

[ 2 ] - ویژگی های رشد و تنوع فنوتیپی ماهی زرده (Euthynnus affinis (Cantor, 1849 در خلیج فارس (آب های هرمزگان)

با توجه به اهمیت اکولوژیک و شیلاتی تون ماهیان در اکوسیستم منحصر به فرد خلیج فارس، شناخت ذخایر این ماهیان به منظور اعمال مدیریت پایدار شیلاتی ضروری به نظر می رسد. این مطالعه به منظور بررسی ویژگی های رشد و شناسایی ذخایر ماهی زرده (E. Affinis) در آب های استان هرمزگان در سه منطقه قشم، ابوموسی و بندر کلاهی با استفاده از مجموعه ای از خصوصیات ریخت سنجی هندسی و شمارشی صورت گرفت. براساس نتایج به دست آمد...

[ 3 ] - Ontogeny of respiration and feeding structures of skull in Persian sturgeon, Acipenser persicus (Bordin, 1897)

In the present study, the process of the skull development and calcification in Persian sturgeon (Acipenser persicus) was studied. Development of cartilage started after hatching around the head and notochord (10.6 mm, total length, TL) and the first calcification process occurred in dermopalatine and dentary bone jaw coincident with mixing feeding. The appearance of dermal skeletal on the body...

[ 4 ] - Cytotoxic activityof cyanobacteria from Geno hot spring on HeLa human cell line

The present study aimed to determine the cellular toxicity and anticancer characteristics of six species of Cyan bacteria living in Geno hot spring on cervical cancer cell lines. For this purpose, the cyto toxicity of methanol extracts from Geno hot spring Cyanobacteria including Leptolyngbya tenuis, Chroococcus minutes, Gloeocapsarupestris, Oscillatoria articulate, Chroococcus namiculata and S...

[ 5 ] - The effects of Geno hot spring cyanobacteria on growth, survival and morphology of gill tissue in killifish Aphanius dispar in normal and long term thermal stress environments

A killifish species Aphanius ginaonis occurs in Geno hot spring is one of the unique fish species that could successfully survive and acclimated to the high temperature of hot springs. In this study, we investigated the effects of Geno's cyanobacteria extracts on growth, survival and morphology of gill tissue in Aphanius dispar exposed to normal temperature and long-term thermal stress. For thi...

[ 6 ] - Selection of suitable reference genes for real-time PCR studies of early developmental stages of sturgeons

In quantitative real-time PCR, the mRNA level can be quantified in relative terms based on the expression ratio of mRNAs of the target gene and an internal reference gene. Since, an internal standard should be expressed at a constant level among different tissues of an organism at all stages of development, and should be unaffected by the experimental treatment, the stability of different refer...

[ 7 ] - Using date pits powder as a low-cost carbohydrate ingredient in the diet of whiteleg shrimp Penaeus vannamei

The present study examined the effect of date pits powder as a low-cost and nutritive carbohydrate source compared to wheat, rice and corn meal in the diet of Pacific shrimp. The date pits meal was applied to the diet at the levels of 0 (control group), 5, 10, 15 and 23%, and the growth performance of shrimp was examined in 8 weeks. The results showed that the weight and length gain, specific g...

[ 8 ] - Comparison of growth parameters, cortisol and muscle gene expression of rainbow trout reared in an open and water reuse system

Fish farming in recirculating aquaculture systems (RAS) has been expanding in the recent years, but the effects of water reuse are not well known. The aim of the present study was to compare the growth parameters, stress response and muscle stress- and growth- related gene expression of rainbow trout (Oncorhynchus mykiss) in open system (OS) versus water reuse system (WRS). For this purpose, yo...

[ 9 ] - Effects of seminal plasma ionic content, pH and osmolality on spermatozoa motility in bester (Female Huso huso × Male Acipenser ruthenus) sturgeon

The ionic contents, pH and osmolality of seminal plasma and their relationships to sperm motility indices (sperm motility duration and percentage of motile sperm) were evaluated in bester. Semen was collected from six bester specimens and their seminal plasma was evaluated. The seminal plasma contained 54.5±2.8 mM sodium, 22.33±2.5 mM chloride, 7.1±1.2 mM potassium, 3.55±0.6 mM calcium and 0.58...

[ 10 ] - Effects of seminal plasma ionic content, pH and osmolality on spermatozoa motility in bester (Female Huso huso × Male Acipenser ruthenus) sturgeon

[ 11 ] - تنوع فنوتیپی گربه ماهی بزرگ دریایی Netuma thalassina (Rüppell, 1837) در سواحل شمالی خلیج فارس و دریای عمان (آب‌های هرمزگان)

این تحقیق با هدف شناسایی ذخایر گربه ماهی بزرگ دریایی Netuma thalassinaکه غالب ترین گربه ماهی دریایی آبهای هرمزگان است با استفاده از ویژگیهای فنوتیپی انجام شد. تعداد 209 گربه‌ماهی‌بزرگ از سه منطقه بندرعباس، بندر جاسک و بندرلنگه صید شد و از ...

[ 12 ] - Seasonal variation in the epidermis structure and protein profile of the skin mucus of Rainbow trout (Oncorhynchus mykiss) at different stages of farming

The aim of this study was to investigate the effect of fish size and seasonality on the epidermis structure and protein profile of the skin mucus of Rainbow trout. Skin mucus samples were collected over three consecutive season periods including late winter, mid spring and early autumn. In each season, sampling was performed separately from three different weight groups including 2-20 gr fish (...