Structure of ripe oocytes of the Sakhalin sturgeon Acipenser mikadoi

Микодина, Е. В.; Novosadova, A. V.

doi:10.1134/s0012496611050176

Cited by 4 publications

(3 citation statements)

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“…Mostly, this circumstance leads to the emergence of different structural anomalies in some parts of released juveniles and cultivating sturgeon brood stocks [ 49 , 50 ] resulting in a decrease in their adaptive capabilities and, as a consequence, the quality of embryos, prolarvae, larvae, fry and juveniles. This is exacerbated by the known diversity of fish in early ontogenesis [ 9 , 51 , 52 , 53 , 54 ], the study of which allowed the establishment of the criteria for estimation of their quality [ 55 ]. Wherein, for the last almost 40 years in Russia, there have been regulatory requirements for abiotic conditions of artificial reproduction and a standard for the weight and size of sturgeon juveniles released by hatcheries into basic rivers [ 56 ].…”

Section: Resultsmentioning

confidence: 99%

“…Morphological abnormalities in the sturgeon body structure are the most noticeable and occur more often than in other cases ( Table 2 , Figure 1 and Figure 2 ). The percentage of such abnormalities varies depending on the fish age, period of detention in artificial conditions, type of fish farming, on average ranging from 5.5% but sometimes reaching 100% in the larvae [ 9 , 49 , 50 , 51 , 52 , 62 , 63 , 64 ]. At the same time, a deviation rate of up to 6% from the normal structure is considered normal [ 63 ].…”

Section: Resultsmentioning

confidence: 99%

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Experience, Principles and Parameters in the Sturgeon Quality Assessment by Anomalies in Early Ontogenesis (A Review)

Assylbekova¹,

Микодина

Isbekov³

et al. 2022

Biology

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Purpose: Review the experience, principles and parameters of the sturgeon assessment quality by anomalies in early ontogeny. Results: Maintaining the number of sturgeon fish in the transboundary Caspian Sea is provided by five states (Russia, Iran, Azerbaijan, Turkmenistan, Kazakhstan) at 16 Sturgeon hatcheries, where their artificial reproduction is carried out. FAO recognizes Russia’s leadership in creating the basic technology for the sturgeon artificial reproduction, but the other four Caspian states also make a significant contribution to its modern optimizations. There is almost a century of tradition behind the technological development of artificial reproduction in sturgeons. During the artificial reproduction of sturgeons, anomalies in the structure and functions may occur, such as deformities, defects in organs and tissues, edema, hematomas, etc. The sturgeon anomalies classification is based on structural and functional principles. Identification of anomalies is carried out on the basis of a previously created classification, divided into nine large classes. Identification of sturgeon anomalies during the period of their artificial reproduction makes it possible to clarify the real value of replenishment of their stock. Methods: Analysis of professional scientific literature and practical guides. Conclusions: The presence and number of Sturgeon anomalies make it possible to determine their death percentage to calculate the real number of replenishment of the Caspian Sturgeon stock.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Experience, Principles and Parameters in the Sturgeon Quality Assessment by Anomalies in Early Ontogenesis (A Review)

Assylbekova¹,

Микодина

Isbekov³

et al. 2022

Biology

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“…The egg envelopes of these sturgeon species have not been studied very systematically. Whereas the structure of the membranes has been thoroughly studied in wild sturgeon (Sadov, ; Vorobyova and Markov, ; Zelazowska, ), investigations of cultured sturgeons refer mainly to the sizes of oocytes and their dimensions as well as to the structure of nuclei and micropyles (Hurvitz et al., ; Mikodina and Novosadova, ).…”

Section: Introductionmentioning

confidence: 99%

Oogenesis of bester hybrids (female Huso huso (Linnaeus, 1758) × male Acipenser ruthenus (Linnaeus, 1758) during the inter-spawning period while cultured in a recycling system

2015

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The study aims were to determine the dynamic changes in oocyte characteristics in the ovaries of two hybrids of beluga and sterlet under controlled conditions. The study was carried out between 2010 and 2012, with fish approaching their maturation period in captivity. Duration of the inter-spawning period lasted from 10 to 12 months for the two hybrids raised at temperatures of 20-21°C. The oocyte envelopes and their characteristics were studied using histology. The oocyte envelope layers showed inter-hybrid differences in growth and structural characteristics. The bester eggs can be determined by their envelope thickness compared to most other sturgeon eggs. Duration of various stages of the individual oogenetic development and envelope formation is described in bester hybrids. These were similar to the oogenesis for both of the other hybrid forms and those observed in the pure sturgeon species.

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Current Data on Sakhalin Sturgeon Acipenser mikadoi (Acipenseridae, Acipenseriformes) Biology (Review)

Микодина

Рубан

2021

Inland Water Biol

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Structure of ripe oocytes of the Sakhalin sturgeon Acipenser mikadoi

Cited by 4 publications

References 1 publication

Experience, Principles and Parameters in the Sturgeon Quality Assessment by Anomalies in Early Ontogenesis (A Review)

Experience, Principles and Parameters in the Sturgeon Quality Assessment by Anomalies in Early Ontogenesis (A Review)

Oogenesis of bester hybrids (female Huso huso (Linnaeus, 1758) × male Acipenser ruthenus (Linnaeus, 1758) during the inter-spawning period while cultured in a recycling system

Current Data on Sakhalin Sturgeon Acipenser mikadoi (Acipenseridae, Acipenseriformes) Biology (Review)

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