نتایج جستجو برای: litopenaus vannamei
تعداد نتایج: 2359 فیلتر نتایج به سال:
Feed is a very important factor in vannamei shrimp culture. The initial stage of stocking the cultivation requiring higher percentage feed. application probiotics intensive culture known to have significant effect on survival shrimp. Encapsulation can increase viability probiotic bacteria compared free cells without encapsulation. Research has been carried out provision encapsulated consortia p...
با توجه به نبود اطلاعات دودمانی و نسبی مشخص از مولدین وارداتی میگوی وانامی (litopenaeus vannamei)، در کشور، همچنین نگرانی از کاهش سطح تنوع ژنتیکی و تجمع درون آمیزی و به منظور مقایسه شاخص های تنوع ژنتیکی و آنالیز تمایز ژنتیکی، مجموع 30 نمونه از تکثیر بوشهر و گمیشان در استان های بوشهر و گلستان با سه جایگشت ریزماهواره ای tudglv5-7.33، tudglv7-9.17، و tudglv1-3.224، ردیابی شدند. در این مطالعه کاهش ...
هدف از مطالعه حاضر، مطالعه‌ی ریخت بافت‌شناسی تخمدان میگوی Litopenaeus vannamei در مراحل مختلف چرخه تولید مثلی است. در این راستا تعداد 30 عدد میگوی ماده Litopenaeus vannamei از مرکز تکثیر و پرورش چوئبده واقع در شهرستان آبادان مورد بررسی قرار گرفتند. نمونه‌برداری در فصل بهار(اردیبهشت ماه 1392) انجام گردید. نمونه‌ها به آزمایشگاه بافت‌شناسی دانشگاه علوم و فنون دریایی خرمشهر منتقل شده و پس از انجام ...
Vitellogenesis is the process of yolk formation via accumulating vitellin (Vn) with nutrients in the oocytes. Expression of vitellogenin (Vg), the precursor of Vn, is one of the indicators for the start of vitellogenesis. In Pacific white shrimp (Litopenaeus vannamei), the type-II vitellogenesis-inhibiting hormone (VIH-2) effectively suppresses hepatopancreatic Vg mRNA expression. In this study...
Ryanodine receptor/calcium release channel is a large protein that plays an essential role in muscle contraction; mutations in the ryanodine receptor gene affect sensitivity to stress. As a first step towards investigating the relationship between the ryanodine receptor and shrimp cramped muscle syndrome, we cloned, partially sequenced, and examined single-nucleotide polymorphisms (SNPs) of the...
We report the construction of sex-specific linkage maps for the white shrimp Penaeus (Litopenaeus) vannamei (Penaeidae; Crustacea). Linkage information was generated using amplified fragment length polymorphism (AFLP) markers in a mapping panel consisting of 42 individuals derived from a commercial cross. We used 103 primer combinations that produced 741 segregating bands. From them, 477 segreg...
C-type lectins play key roles in pathogen recognition, innate immunity, and cell-cell interactions. Here, we report a new C-type lectin (C-type lectin 1) from the shrimp Litopenaeus vannamei (LvCTL1), which has activity against the white spot syndrome virus (WSSV). LvCTL1 is a 156-residue polypeptide containing a C-type carbohydrate recognition domain with an EPN (Glu(99)-Pro(100)-Asn(101)) mot...
The causative agent of myonecrosis affecting cultured Penaeus vannamei in Brazil was demonstrated to be a virus after purification of the agent from infected shrimp tissues. Purified viral particles were injected into specific pathogen-free P. vannamei, resulting in a disease that displayed the same characteristics as those found in the original shrimp used for purification. The virus was named...
The vasa gene encodes an ATP-dependent RNA helicase belonging to the DEAD-box family that, in many organisms, is specifically expressed in germline cells throughout the life cycle. In this study we first cloned Pacific white shrimp (Litopenaeus vannamei) partial cDNAs of two members of the DEAD-box family, one belonging to the vasa subfamily (Lv-Vasa) and the other to the PL10 subfamily (Lv-PL1...
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