نتایج جستجو برای: ennepogon persicus
تعداد نتایج: 822 فیلتر نتایج به سال:
این مطالعه به منظور بررسی قابلیت سازگاری لاروهای 20 روزه تاسماهی ایرانی در شوریهای مختلف جهت بررسی امکان رهاسازی آنها به دریای خزر در پیش بینی بروز بحران خشکسالی و کمبود آب ناشی از آن به انجام رسید. طی این تحقیق در خرداد ماه 1387، تعداد 7000 عدد از لاروهای20 روزه (150 – 100 میلی گرمی با طول متوسط 14/0 ± 6/9 میلی متر) تاسماهی ایرانی در مجاورت شوریهای مختلف 1، 3، 5، 7 ، 8 و 12 در هزار (آب لب شور ...
This study was aimed to observe the correlations among egg, larvae and maternal characteristics of Persian sturgeon. A total of 41 females were used and the variables including fertilization rate, incubation survival rate, larvae survival rate during yolk sac absorption (before feeding), and larvae survival rate after first feeding were determined. As a result, fertilization rate was positively...
Intorduction Dead Sea is a hypersaline lake with 34% salinity, gains its name due to the absence of any living macroscopic creatures. Despite the extreme hypersaline environment, it is a unique ecosystem for various halophilic microorganisms adapted to this environment. Aims & Objectives Halophilic microorganisms are known for various potential biotechnological applications, the purpose of th...
Abstract The eastern part of the Black Sea and its tributaries are suitable habitats for several sturgeon species, among which Acipenser gueldenstaedtii , A. stellatus nudiventris persicus sturio H. huso well documented. However, different threats have led these species to a dramatic decline, all them currently listed as Critically Endangered some Locally Extinct in that area. We tested 94 wild...
Abstract Migratory organisms can be vectors of parasitic host that then transported along seasonal migratory journeys and spread across continents. Ornithophilic nidicolous ticks (e.g. soft ticks) include species responsible for the transmission pathogens bacteria, thus representing a health problem not only wild are directly parasitized, but also those share same environments or reproductive s...
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