Histological Evaluation of Gonad Impairments in Russian Sturgeon (<i>Acipenser gueldenstaedtii</i>) Reared in Recirculating Aquatic System (RAS)
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 (...
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MDPI AG
2020-08-01
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| Online Access: | https://www.mdpi.com/2076-2615/10/8/1439 |
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| author | Małgorzata Rzepkowska Dobrochna Adamek-Urbańska Magdalena Fajkowska Marek Łukasz Roszko |
| author_facet | Małgorzata Rzepkowska Dobrochna Adamek-Urbańska Magdalena Fajkowska Marek Łukasz Roszko |
| author_sort | Małgorzata Rzepkowska |
| collection | DOAJ |
| description | 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 (<i>Acipenser gueldenstaedtii</i>) 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. |
| first_indexed | 2024-03-10T17:17:02Z |
| format | Article |
| id | doaj.art-374d1d35887543e0985c94b271f98495 |
| institution | Directory Open Access Journal |
| issn | 2076-2615 |
| language | English |
| last_indexed | 2024-03-10T17:17:02Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Animals |
| spelling | doaj.art-374d1d35887543e0985c94b271f984952023-11-20T10:28:09ZengMDPI AGAnimals2076-26152020-08-01108143910.3390/ani10081439Histological Evaluation of Gonad Impairments in Russian Sturgeon (<i>Acipenser gueldenstaedtii</i>) Reared in Recirculating Aquatic System (RAS)Małgorzata Rzepkowska0Dobrochna Adamek-Urbańska1Magdalena Fajkowska2Marek Łukasz Roszko3Department of Ichthyology and Biotechnology in Aquaculture, Institute of Animal Sciences, Warsaw University of Life Sciences, 02-786 Warsaw, PolandDepartment of Ichthyology and Biotechnology in Aquaculture, Institute of Animal Sciences, Warsaw University of Life Sciences, 02-786 Warsaw, PolandDepartment of Ichthyology and Biotechnology in Aquaculture, Institute of Animal Sciences, Warsaw University of Life Sciences, 02-786 Warsaw, PolandDepartment of Food Analysis, Institute of Agricultural and Food Biotechnology, 02-532 Warsaw, PolandThe 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 (<i>Acipenser gueldenstaedtii</i>) 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.https://www.mdpi.com/2076-2615/10/8/1439follicular atresiagonadal disordersintersex gonadovarian fatrecirculating aquatic systemssturgeon |
| spellingShingle | Małgorzata Rzepkowska Dobrochna Adamek-Urbańska Magdalena Fajkowska Marek Łukasz Roszko Histological Evaluation of Gonad Impairments in Russian Sturgeon (<i>Acipenser gueldenstaedtii</i>) Reared in Recirculating Aquatic System (RAS) Animals follicular atresia gonadal disorders intersex gonad ovarian fat recirculating aquatic systems sturgeon |
| title | Histological Evaluation of Gonad Impairments in Russian Sturgeon (<i>Acipenser gueldenstaedtii</i>) Reared in Recirculating Aquatic System (RAS) |
| title_full | Histological Evaluation of Gonad Impairments in Russian Sturgeon (<i>Acipenser gueldenstaedtii</i>) Reared in Recirculating Aquatic System (RAS) |
| title_fullStr | Histological Evaluation of Gonad Impairments in Russian Sturgeon (<i>Acipenser gueldenstaedtii</i>) Reared in Recirculating Aquatic System (RAS) |
| title_full_unstemmed | Histological Evaluation of Gonad Impairments in Russian Sturgeon (<i>Acipenser gueldenstaedtii</i>) Reared in Recirculating Aquatic System (RAS) |
| title_short | Histological Evaluation of Gonad Impairments in Russian Sturgeon (<i>Acipenser gueldenstaedtii</i>) Reared in Recirculating Aquatic System (RAS) |
| title_sort | histological evaluation of gonad impairments in russian sturgeon i acipenser gueldenstaedtii i reared in recirculating aquatic system ras |
| topic | follicular atresia gonadal disorders intersex gonad ovarian fat recirculating aquatic systems sturgeon |
| url | https://www.mdpi.com/2076-2615/10/8/1439 |
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