Comparative growth performance of Nile tilapia (Oreochromis niloticus) sex groups intank culture: A hormone-free approach for sustainable aquaculture in Dodoma, Tanzania
Male tilapia are globally preferred in aquaculture for their superior growth and uniform harvest sizes. However, hormonal sex reversal techniques used to produce all-male populations can pose health and environmental risks. This study investigated the growth performance of manually separated monosex...
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Davao Oriental State University
2024-12-01
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| Online Access: | https://davaoresearchjournal.ph/index.php/main/article/view/267 |
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| author | Angelina Michael Rosemary Peter Mramba |
| author_facet | Angelina Michael Rosemary Peter Mramba |
| author_sort | Angelina Michael |
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| description | Male tilapia are globally preferred in aquaculture for their superior growth and uniform harvest sizes. However, hormonal sex reversal techniques used to produce all-male populations can pose health and environmental risks. This study investigated the growth performance of manually separated monosex males, monosex females, and mixed-sex groups of Nile tilapia (Oreochromis niloticus) in tank culture as a sustainable and hormone-free alternative. Over six weeks, the study measured various morphometric parameters, weight gain, specific growth rates, water quality parameters, and condition factors. The fish were fed isonitrogenous commercial feed, and the feeding regime was adjusted based on their weight. Results revealed that monosex tilapia groups attained higher growth rates than mixed-sex groups, with males achieving an average final weight of 56.5 g, followed by females at 53.3 g, and mixed-sex groups at 43.3 g. Males had higher morphometric values compared to females and mixed-sex groups. The water quality parameters remained optimal across all groups, indicating that sex composition does not impact water management. Monosex females and mixed-sex groups exhibited better condition factors. The study concludes that tilapia farming can be effectively conducted with either mono-sex male or monosex female tilapia, as their growth rates do not differ significantly. Further research and development of techniques to ease the separation of sexes and enhance the growth rates of monosex female tilapia are recommended as a viable, hormone-free alternative for sustainable aquaculture. |
| format | Article |
| id | doaj-art-17d30985d5b94ae9b8ab2f348110c90e |
| institution | OA Journals |
| issn | 2244-4432 2984-7125 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Davao Oriental State University |
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| spelling | doaj-art-17d30985d5b94ae9b8ab2f348110c90e2025-08-20T01:55:18ZengDavao Oriental State UniversityDavao Research Journal2244-44322984-71252024-12-0115461810.59120/drj.v15i4.267267Comparative growth performance of Nile tilapia (Oreochromis niloticus) sex groups intank culture: A hormone-free approach for sustainable aquaculture in Dodoma, TanzaniaAngelina Michael0https://orcid.org/0000-0003-3121-9630Rosemary Peter Mramba1https://orcid.org/0000-0002-2216-4300Department of Biology, College of Natural and Mathematical Sciences, University of Dodoma, Tanzania.Department of Biology, College of Natural and Mathematical Sciences, University of Dodoma, Tanzania.Male tilapia are globally preferred in aquaculture for their superior growth and uniform harvest sizes. However, hormonal sex reversal techniques used to produce all-male populations can pose health and environmental risks. This study investigated the growth performance of manually separated monosex males, monosex females, and mixed-sex groups of Nile tilapia (Oreochromis niloticus) in tank culture as a sustainable and hormone-free alternative. Over six weeks, the study measured various morphometric parameters, weight gain, specific growth rates, water quality parameters, and condition factors. The fish were fed isonitrogenous commercial feed, and the feeding regime was adjusted based on their weight. Results revealed that monosex tilapia groups attained higher growth rates than mixed-sex groups, with males achieving an average final weight of 56.5 g, followed by females at 53.3 g, and mixed-sex groups at 43.3 g. Males had higher morphometric values compared to females and mixed-sex groups. The water quality parameters remained optimal across all groups, indicating that sex composition does not impact water management. Monosex females and mixed-sex groups exhibited better condition factors. The study concludes that tilapia farming can be effectively conducted with either mono-sex male or monosex female tilapia, as their growth rates do not differ significantly. Further research and development of techniques to ease the separation of sexes and enhance the growth rates of monosex female tilapia are recommended as a viable, hormone-free alternative for sustainable aquaculture.https://davaoresearchjournal.ph/index.php/main/article/view/267growth performancemonosex tilapianon-hormonal sex separationsustainable fish farmingtank culture |
| spellingShingle | Angelina Michael Rosemary Peter Mramba Comparative growth performance of Nile tilapia (Oreochromis niloticus) sex groups intank culture: A hormone-free approach for sustainable aquaculture in Dodoma, Tanzania Davao Research Journal growth performance monosex tilapia non-hormonal sex separation sustainable fish farming tank culture |
| title | Comparative growth performance of Nile tilapia (Oreochromis niloticus) sex groups intank culture: A hormone-free approach for sustainable aquaculture in Dodoma, Tanzania |
| title_full | Comparative growth performance of Nile tilapia (Oreochromis niloticus) sex groups intank culture: A hormone-free approach for sustainable aquaculture in Dodoma, Tanzania |
| title_fullStr | Comparative growth performance of Nile tilapia (Oreochromis niloticus) sex groups intank culture: A hormone-free approach for sustainable aquaculture in Dodoma, Tanzania |
| title_full_unstemmed | Comparative growth performance of Nile tilapia (Oreochromis niloticus) sex groups intank culture: A hormone-free approach for sustainable aquaculture in Dodoma, Tanzania |
| title_short | Comparative growth performance of Nile tilapia (Oreochromis niloticus) sex groups intank culture: A hormone-free approach for sustainable aquaculture in Dodoma, Tanzania |
| title_sort | comparative growth performance of nile tilapia oreochromis niloticus sex groups intank culture a hormone free approach for sustainable aquaculture in dodoma tanzania |
| topic | growth performance monosex tilapia non-hormonal sex separation sustainable fish farming tank culture |
| url | https://davaoresearchjournal.ph/index.php/main/article/view/267 |
| work_keys_str_mv | AT angelinamichael comparativegrowthperformanceofniletilapiaoreochromisniloticussexgroupsintankcultureahormonefreeapproachforsustainableaquacultureindodomatanzania AT rosemarypetermramba comparativegrowthperformanceofniletilapiaoreochromisniloticussexgroupsintankcultureahormonefreeapproachforsustainableaquacultureindodomatanzania |