نتایج جستجو برای: salmo trutta caspious
تعداد نتایج: 4712 فیلتر نتایج به سال:
A number of demographic factors, many of which related to human-driven encroachments, are predicted to decrease the effective population size (N(e)) relative to the census population size (N), but these have been little investigated. Yet, it is necessary to know which factors most strongly impact N(e), and how to mitigate these effects through sound management actions. In this study, we use par...
Nucleospora salmonis (Hedrick, Groff et Baxa, 1991), an intranuclear microsporidian parasite of marine and freshwater fish, causes diseases mainly in salmonid species. Losses have been reported in stocks of salmonid fish reared in the region of Auvergne (France). The cause of chronic mortalities in the local host species raised in aquaculture and destined for supplementation of the river system...
In the wild, animals are exposed to a growing number of stressors with increasing frequency and intensity, as a result of human activities and human-induced environmental change. To fully understand how wild organisms are affected by stressors, it is crucial to understand the physiology that underlies an organism's response to a stressor. Prolonged levels of elevated glucocorticoids are associa...
This article documents the addition of 171 microsatellite marker loci and 27 pairs of single nucleotide polymorphism (SNP) sequencing primers to the Molecular Ecology Resources Database. Loci were developed for the following species: Bombus pauloensis, Cephalorhynchus heavisidii, Cercospora sojina, Harpyhaliaetus coronatus, Hordeum vulgare, Lachnolaimus maximus, Oceanodroma monteiroi, Puccinia ...
Recombination is thought to occur only rarely in animal mitochondrial DNA (mtDNA). However, detection of mtDNA recombination requires that cells become heteroplasmic through mutation, intramolecular recombination or 'leakage' of paternal mtDNA. Interspecific hybridization increases the probability of detecting mtDNA recombinants due to higher levels of sequence divergence and potentially higher...
تأثیر نوکلئوتید جیره در سطوح مختلف (صفر، 25/0 و 5/0 درصد در جیره کنترل) بر ساختار قسمت های مختلف روده در بچه آزاد ماهی دریایی خزر، salmo trutta caspius با میانگین وزن 001/0±26/12 گرم بعد از 8 هفته بررسی گردید. آزمایش درون مخازن 300 لیتری آب شیرین با تراکم ذخیره سازی 35 قطعه بچه ماهی انجام شد. در پایان دوره پرورش جهت بررسی تأثیر نوکلئوتید بر ساختار بخشهای مختلف روده از هر تیمار 6 قطعه بچه ماهی ص...
brown trout, salmo trutta fario, has a wide range of distribution in the north of iran and in karaj, lighvanchai and karun rivers, but there is no report about its feeding behavior in some water resources including the lar natural park. in order to study feeding behavior of this fish during spawning season, a survey was carried out in the rivers of elarm, aab-sefid, kamardasht and delichayi in ...
در این مطالعه جمعیتهای ماهی قزلآلای خال قرمز salmo trutta l. 1758 رودخانههای لیقوان و مردق در استانهای آذربایجان شرقی و غربی با استفاده از 12 نشانگر ریزماهواره مورد بررسی قرار گرفتند. در مجموع 52 قطعه ماهی از جمعیتهای یادشده به علاوه 45 نمونه از ماهیان رودخانههای بابلرود و هراز مطالعه شد و با توجه به بررسی آللهای خصوصی، انحراف از تعادل هاردی - واینبرگ، تمایز ژنتیکی جمعیتها (آماره 04/0=f...
The commonly applied classification systems of fish gonad maturity divide the maturation process into certain stages. However, the scales do not entirely reflect the continuity of the maturation process. Based on light microscope observations, the paper describes a comprehensive pattern of testicular transformations during maturation. The study was carried out on precocious underyearling and 1-...
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