Results 171 to 180 of about 1,278 (194)
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First evidence of autotriploidization in sterlet (Acipenser ruthenus)
Journal of Applied Genetics, 2013Polyploidization has played an important role in vertebrate evolution. Acipenseridae bring clear examples of polyploidy ancestry and, also, polyploidization seems to be an ongoing process in these fishes. In the present study, the genetic origin of six triploid specimens morphologically determined as Acipenser ruthenus from commercial aquaculture was ...
M, Havelka +3 more
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In vitro sperm maturation in sterlet, Acipenser ruthenus
Reproductive Biology, 2014The aim of the study was to examine sperm maturation in sturgeon and to establish the localization of the maturation. We demonstrated that sperm maturation occurs in sturgeon outside the testes via dilution of sperm by urine. The process involves the participation of high molecular weight (>10kDa) substances and calcium ions.
Borys, Dzyuba +8 more
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Complete mitochondrial genome of sterlet (Acipenser ruthenus)
Mitochondrial DNA, 2013The complete mitochondrial genome of sterlet (Acipenser ruthenus) was determined in this study. The mitogenome is 16,790 bp in length and contains 13 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes and 2 non-coding regions (the control region and the putative origin of the light strand replication) with a typical vertebrate ...
Chao, Li +5 more
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Subdivisions of the olfactory system in the sterlet Acipenser ruthenus
Neuroscience Letters, 1997Subdivisions of the olfactory system of the sterlet Acipenser ruthenus were investigated by means of horseradish peroxidase (HRP) injections into the nose, and by soybean agglutinin binding studies. With both methods primary olfactory fibers were labeled which projected to the ventral part of the glomerular layer of the olfactory bulb.
M H, Hofmann, H, Bleckmann
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Asynchronism in sterlet oocyte development under industrial conditions
Moscow University Biological Sciences Bulletin, 2009Under natural conditions in the course of gametogenesis, the asynchronism in oocyte development in fish ovaries is observed on early stages of gonad maturation and mostly in species with batch spawning. When investigating gametogenesis in sterlet under conditions of a warm-water farm (Konakovsky sturgeon farm), rather uniform development of gametes is ...
O. P. Melekhova, E. A. Chertikhina
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Quantification of egg proteome changes during fertilization in sterlet Acipenser ruthenus
Biochemical and Biophysical Research Communications, 2017Eggs of sterlet are discharged outside into ambient aquatic environment where egg activation and fertilization occur. Effects of different activation media including freshwater and clay suspension on protein abundances of egg were quantified in sterlet Acipenser ruthenus.
Hamid, Niksirat +4 more
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Meiotic Gynogenesis in the Stellate and Russian Sturgeons and Sterlet
Russian Journal of Developmental Biology, 2003Diploid gynogenetic progenies were obtained in the stellate sturgeon Acipenser stellatus, Russian sturgeon, A. gueldenstaedtii, and sterlet A. ruthenus by means of insemination of the eggs with UV-irradiated spermatozoa and suppression of the second meiotic division by heat shock.
A. V. Recoubratsky +7 more
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Morphometric parameters of sterlet when using probiotic compositions
Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries)The paper presents the results of a production experiment on juvenile sterlet (Acipenser ruthenus L. 1758), conducted at the fi sh farm Novaya Akvakultura LLC in the Tyumen Region in a closed water supply system. The aim of our work was to assess the eff ect of probiotic compositions on the dynamics and balance of morphometric parameters of juvenile ...
K.R. Tsitskieva +2 more
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The antioxidant system of sterlet seminal fluid in testes and Wolffian ducts
Fish Physiology and Biochemistry, 2014Oxidative stress is a possible source of spermatozoa function deterioration. Seminal fluid (SF) protects spermatozoa against reactive oxygen species (ROS) attack during development in testes and transit through the reproductive tract. Spermatozoa curvilinear velocity and percent of motile cells as well as changes in thiobarbituric acid-reactive ...
Viktoriya, Dzyuba +6 more
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Fish Physiology and Biochemistry, 2016
In sturgeon, the acquisition of the potential for motility activation called spermatozoon maturation takes place outside testes. This process can be accomplished in vitro by pre-incubation of immature testicular spermatozoa in seminal fluid collected from fully mature Wolffian duct sperm.
Viktoriya, Dzyuba +8 more
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In sturgeon, the acquisition of the potential for motility activation called spermatozoon maturation takes place outside testes. This process can be accomplished in vitro by pre-incubation of immature testicular spermatozoa in seminal fluid collected from fully mature Wolffian duct sperm.
Viktoriya, Dzyuba +8 more
openaire +2 more sources