scholarly journals Histological Evaluation of Gonad Impairments in Russian Sturgeon (Acipenser gueldenstaedtii) Reared in Recirculating Aquatic System (RAS)

Animals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1439
Author(s):  
Małgorzata Rzepkowska ◽  
Dobrochna Adamek-Urbańska ◽  
Magdalena Fajkowska ◽  
Marek Łukasz Roszko
Keyword(s):  
Russian Sturgeon ◽  
Histological Evaluation ◽  
Combined Processes ◽  
Reproductive Disorders ◽  
Endangered Fish ◽  
T Cell Infiltration ◽  
Acipenser Gueldenstaedtii ◽  
Vitellogenin Synthesis ◽  
Biased Sex Ratio ◽  
Severe Pathology

The aim of the study was to raise an issue concerning gonadal impairments in sturgeon reared in recirculating aquatic systems (RAS). In the present study, an in-depth histological evaluation in terms of gonadal pathologies was performed on over-4-year-old (1600 days post-hatching) Russian sturgeon (Acipenser gueldenstaedtii) reared under indoor RAS. A female-biased sex ratio, intersex occurrence, ovarian fat overgrowth, T-cell infiltration and follicle atresia were the most commonly observed disorders in the analyzed gonads. The combined processes of oocyte autophagy and follicular cell apoptosis were engaged in follicular atresia; however, atretic follicles showed a varied morphology, whereas oogonia and oocytes in the early stages of meiosis, as well as spermatogonia, underwent degeneration by apoptosis. The most severe pathology was observed in females with abundant intra-ovarian fat deposition. The extremely fatty ovaries were noted to lose the majority of ovarian follicles, which directly leads to fish sterility. The identified impairments might be related to estrogenic endocrine disruption, as feminization and unspecific vitellogenin synthesis were detected, although the sources of the observed pathologies can be diverse. Therefore, the presented research lays the groundwork for further studies on reproductive disorders in this prized and endangered fish species.

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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