Relationships between seminal fluid sex steroids and milt quality of Russian sturgeon, acipenser gueldenstaedtii, Brandt & Ratzeburg, 1833

2014 ◽  
Vol 6 ◽  
pp. 27-31
Author(s):  
Mostafa Halimi ◽  
Hossein Khara ◽  
Mohsen Imani
Keyword(s):  
Sex Steroids ◽  
Seminal Fluid ◽  
Russian Sturgeon ◽  
Acipenser Gueldenstaedtii

scholarly journals IMPACT OF FREEZING SPEED ON BREEDING QUALITIES OF STURGEON SPERM

2019 ◽  
pp. 83-90
Author(s):  
Maria Mikhailovna Belaya ◽  
Alexandra Andrianovna Krasilnikova
Keyword(s):  
Russian Sturgeon ◽  
Freezing Process ◽  
Cell Organelles ◽  
Acipenser Gueldenstaedtii ◽  
Acipenser Ruthenus ◽  
Long Term Storage ◽  
Species Specific ◽  
Sterlet Acipenser Ruthenus

The article describes the methods of cryopreservation which provides the reliable protection of cell organelles integrity after freezing-defrosting processes, as well as the needed supply of organic substances generating metabolic process in cells and tissues after a double temperature shock, and helps to achieve a significant progress in the cell long-term storage. There are considered the aspects of low temperature preservation of sturgeon sperm. Reproductive cells of Russian sturgeon ( Acipenser gueldenstaedtii Brandt & Ratzeburg, 1833) and sterlet ( Acipenser ruthenus Linnaeus, 1758) obtained at sturgeon hatcheries of the Astrakhan region and the research-expeditionary base “Kagalnik” in the Rostov region during spawning campaign served as the material for research. The purpose of the work was to establish optimal freezing rates during sturgeon sperm cryopreservation process that could ensure saving structural components of reproductive cells. It has been found that the freezing rate is species-specific. The best freezing speed for Russian sturgeon sperm proved to be 3°C/min. When experimenting with sterlet sperm there was registered less damage after freezing and defrosting at 10°C/min. Freezing speed 3°C/min was found less effective for sterlet sperm. Staged freezing process showed worse results in both cases. However, the quality of defrosted sperm didn’t get lower the fish breeding standards in all three studied speeds, which justifies sturgeon sperm freezing at all three rates subject to different conditions of preservation.

scholarly journals Once-a-day Tadalafil administration improves the spermogram parameters in fertile patients

2015 ◽  
Vol 87 (3) ◽  
pp. 210 ◽  
Author(s):  
Antonio Corvasce ◽  
Giuseppe Albino ◽  
Teresa Leonetti ◽  
Agnese Filomena Buonomo ◽  
Ettore Cirillo Marucco
Keyword(s):  
Seminal Fluid ◽  
Semen Quality ◽  
Type A ◽  
Daily Treatment ◽  
Sperm Cells ◽  
Average Increase ◽  
Once Daily ◽  
Positive Effects ◽  
Semen Volume

Objectives: We explored the safety of Tadalafil once-daily treatment for 12 week and its effects on semen quality in a clinical subpopulation of men with psychogenic erectile dysfunction (ED). Patients and Methods: Twenty-seven men, between 19 and 35 years, unaware of their fertility status, suffering from psychogenic ED were enrolled. The examination of the seminal fluid was performed twice before administration of Tadalafil and twice after three months of continuous daily administration of Tadalafil 5 mg. The volume of the seminal fluid, the concentration of sperm, the concentration of sperm with type “a+b” motility, the concentration of sperm with type “a” motility, the concentration of normal sperm were taken into consideration. The results before treatment with Tadalafil (T0) and after 3 months of treatment (T3m) were compared. Results: The administration of once-daily Tadalafil 5mg, brings to an average increase of the total number of sperm cells, both total and fast motility (type a) and the percentage of nemasperms, and to an average increase of semen volume of only 0.41 ml. These quantitative and qualitative improvements of the seminal fluid resulted statistically significant as regard motility, nemasperm percentage and seminal fluid volume. No unespected safety findings were observed. Conclusions: Tadalafil administration improves the quality of sperm cells and seminal fluid: in particular motility, percentage of nemasperms and volume of seminal fluid. We emphasize the safety of the once-daily treatment with tadalafil 5mg and the positive effects on spermatogenesis.

scholarly journals Substitution of Krill meal for Fish Meal in Feed for Russian Sturgeon, Acipenser gueldenstaedtii

2016 ◽  
Author(s):  
Yang-yang Gong ◽  
Yan-qing Huang ◽  
Lu-jiao Gao ◽  
Jian-xue Lu ◽  
Hong-liang Huang ◽  
...  
Keyword(s):  
Fish Meal ◽  
Russian Sturgeon ◽  
Acipenser Gueldenstaedtii

Functional state of the organism of the hybrid Russian sturgeon × Siberian sturgeon (Acipenser gueldenstaedtii × Acipenser baerii) after winter in cages in Volga Delta

2021 ◽  
pp. 60-69
Author(s):  
Svetlana Sergeevna Astafyeva ◽  
Alexander Robertovich Lozovskiy
Keyword(s):  
Blood Glucose ◽  
Carbohydrate Metabolism ◽  
Functional State ◽  
Total Protein ◽  
Siberian Sturgeon ◽  
Russian Sturgeon ◽  
Acipenser Baerii ◽  
Glucose Content ◽  
Volga Delta ◽  
Acipenser Gueldenstaedtii

Two-year-olds (15 individuals) and five-year-olds (15 individuals) of the Russian sturgeon × Siberian sturgeon (Acipenser gueldenstaedtii × Acipenser baerii) hybrid, kept in net cages in the Volga delta, were studied after wintering in order to establish the functional state of the organism according to the complex of indicators of the erythron system and metabolism substances. The results of the performed study found that the erythron system in five-year-olds is characterized by a higher content of erythrocytes and blood hemoglobin (0.58 ± 0.01×10 12 l –1 and 64.98 ± 1.29 g/l, respectively), compared with two-year-olds (0.49 ± 0.02×10 12 l –1 and 64.98 ± 1.29 g/l, respectively).The serum iron content in both groups was the same. A higher content of total protein and albumin in the blood, as well as a greater activity of ALT were found in five-year-olds, compared with two-year-olds. Thus, the content of total protein and albumin in blood serum in five-year-olds was at the level of 48.23 ± 1.54 and 21.58 ± 2.34 g/l, respectively, and in two-year-olds — 32.42 ± 0.92 and 13,84 ± 0.61 g/l, respectively (p < 0.05). The activity of serum ALT in five-year-olds was 1.07 ± 0.06 μkat/l, and in two-year-olds — 0.85 ± 0.03 μkat/l (p < 0.01). Serum cholesterol in five-year-olds (3.94 ± 0.04 mmol/l) and two-year-olds (4.4 ± 0.08 mmol/l) did not differ significantly (p > 0.05). The content of serum triglycerides in five-year-olds (4.50 ± 0.49 mmol/l) and in two-year-olds (5.36 ± 0.45 mmol/l) did not differ significantly (p > 0.05). The study of carbohydrate metabolism revealed a pronounced variability in the glycemic index in the younger age group (coefficient of variation 44.7 %) with an average blood glucose value of 2.69 ± 0.31 mmol/l. The blood glucose content of five-year-olds was higher than that of two-year-olds — 3.84 ± 0.24 mmol/l (p < 0.05). The established parameters of variation and the age specificity of the indicators of the erythron system, protein, lipid and carbohydrate metabolism can be used to assess the state of physiological adaptation of the hybrid after wintering in cages in the Volga delta.

Reference Intervals for Blood Analytes of Adult Aquarium‐Housed Russian Sturgeon ( Acipenser gueldenstaedtii )

2020 ◽  
Author(s):  
Stephen E. Cassle ◽  
Roy P.E. Yanong ◽  
Deborah B. Pouder ◽  
Carlos Rodriguez ◽  
Natalie Mylniczenko ◽  
...  
Keyword(s):  
Reference Intervals ◽  
Russian Sturgeon ◽  
Acipenser Gueldenstaedtii ◽  
Blood Analytes
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