Distribution and changes in the sbGnRH system in Rastrelliger brachysoma males during the breeding season
Rastrelliger brachysoma is a mariculture candidate species, but reproduction in captive fish has been problematic. This report examines the difference in the HPG axis, the neuroendocrine system and the development of reproductive tissues between captive vs. wild male R. brachysoma. The gonadosomatic...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2021-09-01
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| Series: | Scientia Marina |
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| Online Access: | https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1906 |
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| author | Sinlapachai Senarat Jes Kettratad Wannee Jiraungkoorskul Niwat Kangwanrangsan Masafumi Amano Akio Shimizu F. Gerald Plumley Sasipong Tipdomrongpong |
| author_facet | Sinlapachai Senarat Jes Kettratad Wannee Jiraungkoorskul Niwat Kangwanrangsan Masafumi Amano Akio Shimizu F. Gerald Plumley Sasipong Tipdomrongpong |
| author_sort | Sinlapachai Senarat |
| collection | DOAJ |
| description | Rastrelliger brachysoma is a mariculture candidate species, but reproduction in captive fish has been problematic. This report examines the difference in the HPG axis, the neuroendocrine system and the development of reproductive tissues between captive vs. wild male R. brachysoma. The gonadosomatic index (GSI) of sexually mature male wild R. brachysoma was 1.12±0.34 and 1.94±0.26 during the non-breeding and breeding seasons, respectively. Captive R. brachysoma had a GSI of 1.88±0.17. All wild R. brachysoma were in the late spermatogenic stage irrespective of seasons. Immunostaining results showed that sbGnRH-immunoreactive neurons were distributed in three areas of the brain, namely the nucleus periventricularis, nucleus preopticus and nucleus lateralis tuberis. Follicle stimulating hormone and luteinizing hormone immunoreactivities were also observed in the pituitary gland. The levels of brain sbGnRH and GtH mRNA were not significantly different between the non-breeding and breeding seasons, but captive fish displayed (times or percent difference) lower mRNA levels than wild fish. These results suggest that these hormones control the testicular development in R. brachysoma and that the impaired reproduction in captivity may be due to their relative lower expression levels of follicle stimulating hormone and luteinizing hormone genes. |
| first_indexed | 2024-12-20T16:47:14Z |
| format | Article |
| id | doaj.art-7eb27b1c7852472f842a5093f6f65103 |
| institution | Directory Open Access Journal |
| issn | 0214-8358 1886-8134 |
| language | English |
| last_indexed | 2024-12-20T16:47:14Z |
| publishDate | 2021-09-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Scientia Marina |
| spelling | doaj.art-7eb27b1c7852472f842a5093f6f651032022-12-21T19:32:54ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342021-09-0185310.3989/scimar.05023.017Distribution and changes in the sbGnRH system in Rastrelliger brachysoma males during the breeding seasonSinlapachai Senarat0Jes Kettratad1Wannee Jiraungkoorskul2Niwat Kangwanrangsan3Masafumi Amano4Akio Shimizu5F. Gerald Plumley6Sasipong Tipdomrongpong7Department of Marine Science, Faculty of Science, Chulalongkorn UniversityDepartment of Marine Science, Faculty of Science, Chulalongkorn University - Marine Ecology and Marine Resources Utilization Research Unit, Aquatic Resources Research Institute, Chulalongkorn UniversityDepartment of Pathobiology, Faculty of Science, Mahidol UniversityDepartment of Pathobiology, Faculty of Science, Mahidol UniversitySchool of Marine Biosciences, Kitasato UniversityNational Research Institute of Fisheries Science, Japan Fisheries Research and Education AgencyMarine Ecology and Marine Resources Utilization Research Unit, Aquatic Resources Research Institute, Chulalongkorn UniversitySamut Songkhram Coastal Fisheries Research and Development Centre, Department of FisheriesRastrelliger brachysoma is a mariculture candidate species, but reproduction in captive fish has been problematic. This report examines the difference in the HPG axis, the neuroendocrine system and the development of reproductive tissues between captive vs. wild male R. brachysoma. The gonadosomatic index (GSI) of sexually mature male wild R. brachysoma was 1.12±0.34 and 1.94±0.26 during the non-breeding and breeding seasons, respectively. Captive R. brachysoma had a GSI of 1.88±0.17. All wild R. brachysoma were in the late spermatogenic stage irrespective of seasons. Immunostaining results showed that sbGnRH-immunoreactive neurons were distributed in three areas of the brain, namely the nucleus periventricularis, nucleus preopticus and nucleus lateralis tuberis. Follicle stimulating hormone and luteinizing hormone immunoreactivities were also observed in the pituitary gland. The levels of brain sbGnRH and GtH mRNA were not significantly different between the non-breeding and breeding seasons, but captive fish displayed (times or percent difference) lower mRNA levels than wild fish. These results suggest that these hormones control the testicular development in R. brachysoma and that the impaired reproduction in captivity may be due to their relative lower expression levels of follicle stimulating hormone and luteinizing hormone genes.https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1906agriculturefoodGnRH-GtH systemhistologymackerelproductivity |
| spellingShingle | Sinlapachai Senarat Jes Kettratad Wannee Jiraungkoorskul Niwat Kangwanrangsan Masafumi Amano Akio Shimizu F. Gerald Plumley Sasipong Tipdomrongpong Distribution and changes in the sbGnRH system in Rastrelliger brachysoma males during the breeding season Scientia Marina agriculture food GnRH-GtH system histology mackerel productivity |
| title | Distribution and changes in the sbGnRH system in Rastrelliger brachysoma males during the breeding season |
| title_full | Distribution and changes in the sbGnRH system in Rastrelliger brachysoma males during the breeding season |
| title_fullStr | Distribution and changes in the sbGnRH system in Rastrelliger brachysoma males during the breeding season |
| title_full_unstemmed | Distribution and changes in the sbGnRH system in Rastrelliger brachysoma males during the breeding season |
| title_short | Distribution and changes in the sbGnRH system in Rastrelliger brachysoma males during the breeding season |
| title_sort | distribution and changes in the sbgnrh system in rastrelliger brachysoma males during the breeding season |
| topic | agriculture food GnRH-GtH system histology mackerel productivity |
| url | https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1906 |
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