A Review on the Production and Culture Techniques of Monosex Tilapia

Bardhan, Avishek; Sau, S. K.; Khatua, Sanjib; Bera, Madhabendu; Paul, B.N.

doi:10.20546/ijcmas.2021.1001.069

Cited by 10 publications

(7 citation statements)

References 41 publications

(32 reference statements)

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“…Tilapia ( Oreochromis niloticus ) is the second most farmed fish following cyprinid fish worldwide with an annual output of 6.6 million tons in 2019 (Bardhan et al, 2021; Wang & Lu, 2016). In China, the production of tilapia was up to 1.6 million tons in 2019 (Li et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Construction of Streptococcus agalactiae sialic acid mutant and evaluation of its potential as a live attenuated vaccine in Nile tilapia (Oreochromis niloticus)

Hao

Wang

Wei³

et al. 2022

Journal of Applied Microbiology

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Aims: This study aimed to develop a live attenuated vaccine as an effective approach to prevent streptococcosis in tilapia (Oreochromis niloticus). Methods and results:We eliminated the virulence factor, sialic acid (Sia) encoded by the neuA-D gene cluster from the Group B Streptococcus (Streptococcus agalactiae, GBS) strain WC1535, to construct Sia-deficient S. agalactiae (ΔSia) mutant by homologous recombination. Results showed that the ΔSia mutant had higher adherence to HEp-2 cells and lower resistance to RAW264.7 cell phagocytosis than the wild-type S.agalactiae. The virulence of the ΔSia mutant to tilapia dramatically decreased with no virulence recovery. The relative percent survivals (RPSs) were 50.00% and 54.50% at 30 days when challenged at the wild-type WC1535 doses of 1.0 × 10 7 and 5.0 × 10 7 CFU fish −1 , respectively, via intraperitoneal (IP) injection. The tilapia vaccinated via IP injection with the ΔSia mutant induced strong antibody agglutination titers. The expression of IL-1β, TNFα, MHC-Iα, and MHC-IIβ could be enhanced in the intestine, spleen, and head kidney for tilapia administered with the ΔSia mutant.Conclusions: GBS Sia plays a critical role in adherence to HEp-2 cells and resistance to the immune clearance of RAW264.7 cells. Moreover, the ΔSia mutant is a safe, stable, and immunogenic live attenuated vaccine candidate to protect tilapia against GBS infection. Significance and impact of study:The results offer more evidence of the importance of Sia in GBS and may be instructive in the control of tilapia streptococcosis.

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Section: Introductionmentioning

confidence: 99%

Construction of Streptococcus agalactiae sialic acid mutant and evaluation of its potential as a live attenuated vaccine in Nile tilapia (Oreochromis niloticus)

Hao

Wang

Wei³

et al. 2022

Journal of Applied Microbiology

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“…Hormonal sex reversal is a technique of changing sex by administering hormones before or during the period of sexual differentiation. Tilapia sex reversal, the technology for producing all male tilapia, has tilapia culture is preferred by farmers for increased productivity due to faster growth of males as well as to control unwanted reproduction by females (Bardhan et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Mixed sex culture exhibits stunted somatic growth of the progeny through unwanted reproduction throughout the year. In contrast, the male‐only tilapia culture is preferred by farmers for increased productivity due to faster growth of males as well as to control unwanted reproduction by females (Bardhan et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

The efficacy of using pine (Pinus massoniana) pollen as an alternative to synthetic steroids in producing monosex male Nile tilapia (Oreochromis niloticus, L.)

Aziz

Mostary

Sume

et al. 2022

Aquaculture Fish & Fisheries

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Synthetic sex steroids are widely used to produce all‐male stocks in Nile tilapia (Oreochromis niloticus). However, there is a growing concern about the use of synthetic steroid hormones in fish as food. We investigated the efficacy of a natural sex hormone as an alternative to synthetic steroids in producing monosex male tilapia. Two‐day‐old fry were fed pine pollen powder at three different concentrations (0.5%, 1.0%, 1.5%) for 28 days and subsequently reared for 3 months to observe the efficacy of pine pollen as well as to optimize the concentration for sex reversal. As a positive control, same‐aged fry of three different commercial tilapia hatcheries were fed synthetic steroid and 17‐α‐methyl testosterone‐treated feed (60 mg/kg) for the same duration. Before analyzing the phenotypic sex, the fish were reared on untreated commercial feed for 90 days in separate tanks. The 1.0% pine pollen treatment yielded a mean of 92.50 ± 0.51% males among the progeny, higher than the mean (89.49 ± 0.25%) obtained from synthetic steroid treatments. This result demonstrates that pine pollen could be an effective compound for the direct masculinization of Nile tilapia. We also obtained a significant difference (p < 0.05) in the growth performance and survival of tilapia using the dietary allotment of pine pollen. Our study suggests the feasibility of this compound as an eco‐friendly method of masculinization of tilapia and can be tried in commercial aquaculture practice.

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“…In the past decades, many authors have reported that hormone is a naturally-occurring or synthetic androgens and estrogens which shown growth-promoting effect in many cultured fishes (Pelissero and Sumpter, 1992;James and Sampath, 2006). In the recent years, monosex seed production technology has become a common practice among the various animal production sectors (Bardhan et al, 2021). However, the hormone residue is creating various negative impacts to the natural ecosystem which making the hormone based sex reversal as a much challenging task in the recent times (Azizi-lalabadi and Pirsaheb.…”

Section: Introductionmentioning

confidence: 99%

Optimization of 17α-Methyl Testosterone Dose in Artemia Nauplii and Rotifer using Enrichment Technique

Bhosle

Kumar

Antony

et al. 2022

IJAR

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Background: The present study explored the possibility of using live feed, as vector for supplementing the androgenic hormone in aquaculture seed production. Methods: The study consisted of five treatment doses of 17α-methyl testosterone namely; control (without hormone), T1 (20 mg L-1), T2 (40 mg L-1), T3 (60 mg L-1) and T4 (80 mg L-1) and each were triplicated. The doses were tested in the live feed of Artemia nauplii and rotifer by following completely randomized design. The Artemia nauplii (Artemia salina), collected by hatching the Artemia cyst and 5-8 days old rotifers, collected from mass culture unit of rotifer, were released in their respective treatment doses at 100 and 800 individuals/ml, respectively. Result: The study found significant difference in accumulation of hormone in the tissues of live feed at different time intervals. In Artemia, significantly higher amount of 17α-MT (15.33±0.09 mg L-1) was observed in 80 mg L-1 group at 24 h. In rotifer, significantly higher value of 17α-MT (17.42±0.06 mg L-1) was recorded in 60 mg L-1 group at 6 h. The level of 17α-MT in Artemia nauplii and rotifer started showing a decreasing trend in 24 h and 6 h, respectively. Overall the findings of the present study support that supplementation of hormone through live feed is possible as live feed accumulated 17α-MT in its tissue after enrichment which can be further explored for producing all-male population in a more sustainable way.

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A Review on the Production and Culture Techniques of Monosex Tilapia

Cited by 10 publications

References 41 publications

Construction of Streptococcus agalactiae sialic acid mutant and evaluation of its potential as a live attenuated vaccine in Nile tilapia (Oreochromis niloticus)

Construction of Streptococcus agalactiae sialic acid mutant and evaluation of its potential as a live attenuated vaccine in Nile tilapia (Oreochromis niloticus)

The efficacy of using pine (Pinus massoniana) pollen as an alternative to synthetic steroids in producing monosex male Nile tilapia (Oreochromis niloticus, L.)

Optimization of 17α-Methyl Testosterone Dose in Artemia Nauplii and Rotifer using Enrichment Technique

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