نتایج جستجو برای: russian sturgeon
تعداد نتایج: 45392 فیلتر نتایج به سال:
A partial sequence of the mtDNA ND5 gene region was used for population study in Persian sturgeon (west and east areas of southern Caspian Sea). The result showed that although this approach was informative for phylogenetic study in sturgeon, it was less informative for population study in Persian sturgeon.
In this study, growth performance, gonadosomatic index (GSI), and gonadal histology of beluga (Huso huso) and Persian sturgeon (Acipenser persicus) were investigated for 12 months. Sixty individuals of fifteen-month old beluga and Persian sturgeon with body mean weight of 781±55 g and 469.5±38 g, respectively, were distributed in the concrete tanks (5×1×1 m) with water capacity of 2.5 m3 in tri...
Measurements of branchial cavity water pressures and flow patterns, arterial blood PO2 and pH, and oxygen utilization and uptake have been made in undisturbed, free swimming sturgeon, Acipenser transmontanus. Although the jaws are degenerate and the oral apparatus is highly modified for feeding, gill ventilation is nonetheless powered by a buccal force pump and an opercular suction pump common ...
In 2009, juvenile pallid sturgeon Scaphirhynchus albus, reared at the Blind Pony State Fish Hatchery (Missouri, USA) to replenish dwindling wild stocks, experienced mass mortality. Histological examination revealed extensive necrosis of the haematopoietic tissues, and a virus was isolated from affected organs in cell culture and then observed by electron microscopy. Experimental infection studi...
In species with long life cycles and discontinuous availability of individuals to reproduction, implementing a long-term captive breeding program can be difficult or impossible. In such cases, managing diversity among familiar groups instead of individuals could become a suitable approach to avoid inbreeding and increase the possibility to accomplish a breeding scheme. This is the case of sever...
Studies of innate immunity in fish species of special concern are essential for better understanding of their health status during hatchery rearing conditions. The cytochemical and morphological characterizations of blood granulocytes have been used to provide information about phylogenetic differences and determine the potential use of neutrophil function assays. Rapid, simple, cytochemical st...
In a Perspective, Chris Beyrer and coauthors discuss the threat of HIV to health in the Russian Federation.
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