نتایج جستجو برای: قره برون acipenser persicus
تعداد نتایج: 9601 فیلتر نتایج به سال:
mitochondria1 dna (mtdna) control region sequences were analyzed to evaluate the population genetic structure of persian sturgeon (acipenser persicus) in caspian sea. a total of 45 specimens were collected from the different locations of the caspian sea. mtdna control region was amplified using pcr. direct sequencing was performed according standard method. the results showed that 12 haplotypes...
in the present study, mitochondrial dna polymerase chain reaction-restriction fragment length polymorphism (pcr-rflp) assay was used to assess the population structure and genetic relationships among six persian sturgeon, acipenser persicus populations from south caspian sea along the iranian coast. the complete nucleotide dehydrogenase subunit 5 (nadh 5) region of mtdna amplified by pcr was di...
histopathological and pathomorphological effects of 15 ppb mercuric chloride on persian sturgeon, acipenser persicus, were investigated using histological and electron microscopy observations. light microscopy showed that the gill epithelial hypertrophy, wrinkling and hyperplasia in lamellar epithelia and lamellae fusion occurred after 48 h of exposure. gill epithelia also showed occasional nec...
هدف مقایسه ی سطوح استروئیدهای جنسی و هیپوفیزی شامل تستوسترون، 17- بتا استرادیول، gth-i، gth-ii و فاکتور های استرس شامل کورتیزول و گلوکز، در جنس های نر و ماده ی مولدین تاسماهی ایرانی (acipenser persicus) صید شده از دریا و ارزیابی ارتباط بین مرحله ی رسیدگی جنسی با میزان این هورمون ها و استرس ناشی از مهاجرت و صید در این گونه از تاسماهیان بود. نمونه برداری از چهارده مولد نر و ماده ی تاسماهی ایرانی،...
high mortality and labor costs are associated with first-feeding sturgeon culture, particularly during the period of dietary transition from live to formulated feed. therefore we investigated the effects of various feeding treatments on the survival and growth of the persian sturgeon ( acipenser persicus ) larvae during a 20-day culture period. three replicate groups (250 fish/replicate) of fir...
با توجه به طولانی بودن سن بلوغ در تاسماهیان و نیز به دلیل عدم وجود تفاوتهای مورفولوژیک بین ماهیان نر و ماده حتی در ماهیان مولد، تشخیص جنسیت در این گروه از ماهیان با مشکلاتی همراه است. در این تحقیق بر اساس تکنیک aflp و با استفاده از 100 جفت ترکیب پرایمر، ژنوم 10 نمونه ماهی نر و 10 نمونه ماهی ماده تاسماهی ایرانی در حوضه جنوبی دریای خزر مورد بررسی قرار گرفت. بررسی حدود 3771 باند که 1132 باند آن پل...
the persian sturgeon, acipenser persicus (borodin, 1897), is an economically important species, which mainly inhabits the caspian sea. however, little is known about its population genetic structure. in this study, variation in nucleotide sequences of the mitochondrial dna (mtdna) control region of wild stock persian sturgeon was determined to assess the genetic diversity among different natura...
the late sexual maturity in sturgeon and the absence of morphological differences between males and females makes sex discrimination difficult. identification of sex at an early life stage is of high interest in caviar production because it allows efficient selection of females. in this study, the genome of 10 mature male and 10 mature female specimens of persian sturgeon (acipenser persicus...
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