Effect of Pawpaw (Carica Papaya) Seed Meal on Sex Determination, Growth, and Survival, of Oreochromis mossambicus Fry

Omeje, Victor Okonkwo; Lambrechts, H.; Brink, D.

doi:10.46989/001c.20942

Cited by 6 publications

(3 citation statements)

References 12 publications

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“…The dosage of 120 g kg −1 led to permanent sterility in Nile tilapia ( Abdelhak et al, 2013). Likewise, the inclusion of pawpaw seed powder in the diets of Nile tilapia and Mozambique tilapia fry (Table 1) shifted fish sex to all‐male (Ahmed et al, 2019; Ampofo‐Yeboah, 2013; Omeje et al, 2018). The masculinization of tilapia could be linked to the androgens in pawpaw seed meal that lower 17β‐estradiol levels in the female fish, while favoring production of testosterone (Ampofo‐Yeboah, 2013).…”

Section: Plant Extracts Used In the Control Of Tilapia Reproductionmentioning

confidence: 99%

The use of plant extracts to control tilapia reproduction: Current status and future perspectives

Abaho

Masembe

Akoll

et al. 2021

J World Aquaculture Soc

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Control of prolific reproduction is vital for a profitable tilapia aquaculture enterprise. All-male tilapia culture is a popular method used to control prolific breeding, because the male individuals grow faster than female and mixed-sex populations. Presently, most farmers use 17α-methyl testosterone (MT) to produce all-male tilapia individuals, although synthetic hormones are linked to human health and environmental risks. Recently, considerable attention has focused on plant-based products as alternatives to MT, because they are affordable, safe, and eco-friendly. Despite the growing interest in using plant extracts to prevent frequent spawning in tilapia production, the available information is not collated to standardize application guidelines. Accordingly, this review article consolidates existing knowledge on the use of plant extracts to control prolific breeding in tilapia culture systems. In addition, limitations to commercial application of the extracts are identified. To date, seed, root, and leaf extracts of 20 plant species, most notably, Tribulus terrestris, Mucuna pruriens, and Carica papaya, exhibit potential for controlling unwanted breeding in tilapia production systems. The extracts are mainly administered orally, incorporated in fish feeds. Saponins and flavanoids are the main bioactive compounds in the phytoextracts,

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Section: Plant Extracts Used In the Control Of Tilapia Reproductionmentioning

confidence: 99%

The use of plant extracts to control tilapia reproduction: Current status and future perspectives

Abaho

Masembe

Akoll

et al. 2021

J World Aquaculture Soc

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“…Aunque existen varios autores que destacan algunos resultados relevantes en cuanto al uso de productos de origen vegetal y sus extractos como fuentes de compuestos naturales para lograr el efecto de masculinización (Woken y Orose 2021, Abaho et al 2022), incluyendo el uso de semillas de papaya Carica papaya (Omeje et al 2018, Omeje et al 2020, extractos de hoja y raíz del pino Pinus kesiya (Roque et al 2018), el abrojo de flor amarilla Tribulus terrestris (Sadek et al 2020, Zaki et al 2021) y extractos de semillas de Mucuma pruriens y raíz de Asparagus racemosus (Mukherjee et al 2018); sin embargo es importante destacar que aunque se han logrado valores en el orden de 60 a 85% de eficiencia de masculinización; hay varios factores a considerar, tales como la falta de la estandarización en los protocolos de extracción, dosis óptimas y los mecanismos de acción de la mezcla de compuestos activos (Abaho et al 2022). Por lo que continuar con la exploración de compuestos debidamente identificados de forma individual, parece ser una mejor opción para continuar con esta línea de investigación.…”

Section: Introductionunclassified

Masculinización, crecimiento y supervivencia de tilapia Oreochromis niloticus con inhibidores de aromatasa naturales y sintéticos

Estrada-Godínez,

Alaníz-González,

Abdo-de la Parra

et al. 2024

Ecosist. Recur. Agropec.

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Se evaluó el efecto de inhibidores naturales y sintéticos de la enzima aromatasa sobre el crecimiento, supervivencia y masculinización en crías de tilapia del Nilo. Cinco flavonoides: crisina (CRI), 7-hidroxiflavona (7-HF), apigenina (NA), naringenina (NAR) y 7-metoxiflavona (7-MF) a 1 000, 1 500 y 2 000 mg kg-1; un compuesto no esteroideo: letrozol (LT) a 50, 100 y 200 mg kg-1 y dos esteroides sintéticos: exemestano (EXE) a 1 000, 1 500 y 2 000 mg kg-1 y 17 α-metiltestosterona (MT) a 60 mg kg-1 (C+) y un control negativo libre de compuestos (C-). Cada tratamiento se realizó por triplicado con n= 30 peces por réplica (0.012 ± 0.01 g) en tanques cilíndricos (6 L) con flujo continuo a 28°C. Los grupos 7-HF a 1 000 y 2 000 mg kg-1 presentaron el crecimiento específico significativamente mayor (16.08 ± 0.63% y 8.38 ± 2.11%, respectivamente). La supervivencia fue de 100%, excepto: 7-HF 2000 mg kg-1, NA 1 500 mg kg-1, 7-MF a 1 500 mg kg-1 y EXE 1 500 y 2 000 mg kg-1, con 80 y 90%. El porcentaje de machos en MT, EXE y LT fue 100%, pero los tratamientos con flavonoides fueron muy variables, pero incrementando de un 57% de machos en el C-, de 71 a 86%, para CRI 2000, 7-HI 1 500, y todos los niveles de inclusión de los tratamientos 7-MET, NA y NAR.Se espera continuar la evaluación para establecer la concentración de inhibidores naturales que sea más cercana a 100% de machos.

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“…Testosterone is a hormone produced by Leydig cells in the testes and plays an important role in spermatogenesis (Akbarinejad et al, 2017). The 17α-methyltestosterone (MT) is a synthetic androgen hormone derivative that has been widely used in aquaculture for masculinization, sexual inversion, and reproductive stimulation (Adenigba et al, 2017;Huang et al, 2019;Mordenti et al, 2017;Omeje et al, 2018;Passini et al, 2018;Wang et al, 2020). The use of MT in male P. monodon shrimp is to stimulate the formation and development of the testes in producing sperm.…”

Section: Introductionmentioning

confidence: 99%

Improved reproductive performance of captive male broodstock of tiger shrimp Penaeus monodon with 17α-methyltestosterone induction

Rosmiati

Parenrengi

Suryati

et al. 2022

Israeli Journal of Aquaculture - Bamidgeh

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The purpose of this study was to evaluate the influence of different 17αmethyltestosterone injection frequencies at optimal doses to improve the quality of spermatophore and reproductive performance of captive male broodstock of tiger shrimp Penaeus monodon. Broodstocks of tiger shrimp weighing 51-65 g for males and 86-161 g for females were collected from ponds and stored in a 3,000 m 3 concrete tank. Male broodstocks were injected with 17α-methyltestosterone at the optimized protocol at 300 ng/100 g body weight at different injection frequencies, three times, four times, and five times at seven-day intervals. As a control, male broodstocks were injected with a saline solution to determine the spermatophore quality. Evaluation of the reproductive performance of the captive male was observed in the captive female broodstock tiger shrimp using artificial insemination. The weight of spermatophore (0.041 g), gonadosomatic index (7.71%), the total number of spermatozoa (64 × 10 6 cells/mL) significantly increased, and the percentage of abnormal spermatozoa significantly decreased by 73% as well as hatching rate increased to 43.14% at the injection frequency of four times compared to the other treatments. In conclusion, injection of 17α-methyltestosterone at the dosage of 300 ng/100 g body weight at the frequency of giving four times was effective enough to improve the reproductive performance of captive tiger shrimp. Therefore, the method proposed can be a strategy to produce better larvae and increase the income of the aquaculture business.

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Effect of Pawpaw (Carica Papaya) Seed Meal on Sex Determination, Growth, and Survival, of Oreochromis mossambicus Fry

Cited by 6 publications

References 12 publications

The use of plant extracts to control tilapia reproduction: Current status and future perspectives

The use of plant extracts to control tilapia reproduction: Current status and future perspectives

Masculinización, crecimiento y supervivencia de tilapia Oreochromis niloticus con inhibidores de aromatasa naturales y sintéticos

Improved reproductive performance of captive male broodstock of tiger shrimp Penaeus monodon with 17α-methyltestosterone induction

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