Hormonal sex reversal of Atlantic halibut (Hippoglossus hippoglossus L.)

Hendry, C. I.; Martin-Robichaud, D. J.; Benfey, Tillmann J.

doi:10.1016/s0044-8486(02)00344-7

Cited by 59 publications

(38 citation statements)

References 21 publications

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“…Highest percentage (92.27%) of males were produced when fed with 17a-MT at 5 mg kg -1 feed. The present study also is in agreement with Hendry et al (2000) who produced 97-100% male dominated population of Atlantic halibut (Hippoglossus hippoglossus) when the post-larvae were fed with artificial pellets supplemented with 17a-methyldihydrotestosterone at 1 and 5 ppm. Hunter and Donaldson (1983) reported that treatment with androgens have been found to induce intersexuality (hermaphroditism) in guppy, rainbow tout, chinook salmon, masu salmon, Atlantic salmon and grass carp.…”

Section: Type III (Normal Ovary)supporting

confidence: 92%

Production of all male population of Indian catfish Heteropneustes fossilis (Bloch) by immersion and oral treatment of 17α-methyltestosterone

Chakraborty

Marx

2016

Indian J. Fish.

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Male dominated population of Indian catfish, Heteropneustes fossilis (Bloch) was produced through immersion and oral treatments with 17a-methyltestosterone (17a-MT). Two approaches were tested in immersion treatment. A group of fertilized eggs was exposed to a short duration treatment of 3 h with 17a-MT at 0, 50, 100, 150 and 200 µgl -1 and another group to a long duration treatment of 10 days at the same doses. A separate group of 3 days old hatchlings were fed with the hormone at 0, 5, 10, 15 and 20 mg kg -1 feed over a period of 28 days. Gonadal histology of the fishes 4 months post-treatment revealed significant (p<0.01) masculinising effect of 17a-MT both in orally and immersion treated groups over the control. Among orally treated groups, most significant (p<0.01) effect was observed in the group that received hormone @5 mg kg -1 feed where 92.27% males were produced as compared to 43.05% males in the control group. Highest rate of masculinisation (97.56%) was achieved in short term immersion in 100 µgl -1 followed by 96.29% in 50 µgl -1 , whereas, in long term immersion, it was 92.59% in 50 µgl -1 followed by 92.41% in 100 µg l -1 . There was no significant (p>0.05) difference between 50 and 100 µg l -1 concentrations in both short term and long term immersion treatments.

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Section: Type III (Normal Ovary)supporting

confidence: 92%

Production of all male population of Indian catfish Heteropneustes fossilis (Bloch) by immersion and oral treatment of 17α-methyltestosterone

Chakraborty

Marx

2016

Indian J. Fish.

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“…Successful sex reversal requires the introduction of hormones prior to gonadal differentiation, which is typically observed in females before males. Based on the results of this study, steroids should be administered to both species beginning at approximately 25 mm TL, shortly after weaning to dry feed, as is also the case for Atlantic halibut (Hendry et al 2002(Hendry et al , 2003. Steroids are easily incorporated into dry fish feeds, suggesting that sex reversal should be easy to achieve in these species once optimal dose and treatment duration are determined (Piferrer 2001).…”

Section: Discussionmentioning

confidence: 99%

Gonadal differentiation in Atlantic cod, <I>Gadus morhua</I> L., and haddock, <I>Melanogrammus aeglefinus</I> (L.)

Chiasson¹,

Benfey²,

Martin-Robichaud³

2008

Acta Icth et Piscat

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. 2008. Gonadal differentiation in Atlantic cod, Gadus morhua L., and haddock, Melanogrammus aeglefinus (L.). Acta Ichthyol. Piscat. 38 (2): 127-133.Background. The purpose of this study was to determine the timing of gonadal differentiation in two gadoids: Atlantic cod, Gadus morhua L., and haddock, Melanogrammus aeglefinus (L.). This information is required to develop a practical protocol for the production of monosex populations of these species for aquaculture. Materials and Methods. Cultured larvae and juveniles were collected weekly, measured (total length; TL), prepared histologically and then examined microscopically for the presence of characteristic stages of gonadal differentiation. Results. In Atlantic cod, undifferentiated gonads were present by 18 mm TL, at 84 days post hatch (dph), and definitive germ cells by 19 mm TL (90 dph). Ovarian cavities were first observed at 27 mm TL (102 dph), and by 35 mm TL (112 dph) anatomical divergence into two types of gonads was clear. In haddock, undifferentiated gonads were observed at 21 mm TL (64 dph) and an ovarian cavity was evident at 29 mm TL (71 dph). Conclusion. Gonadal differentiation in Atlantic cod and haddock occurs at roughly the same size in both species (27 and 29 mm TL, respectively). For successful sex reversal, the administration of steroids should therefore begin at approximately 25 mm TL, shortly after weaning onto dry feed.

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“…17α-Metiltesteron and estradiol-17β are the most widely used hormones. Individuals especially of Cichlidae and Cyprinidae may grow 2-3 times faster when they are treated with optimal hormone dosage (1,9,18). …”

Section: Introductionmentioning

confidence: 99%

“…Initial studies about sex control in aquaculture were performed by Hendry et al (9), Pandian et al (18) and Yamamoto (25). Commercial methods have been optimized for production of all female populations by synthetic steroids (6,12).…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Hormones on Sex Reversal of Rainbow Trout (Oncorhynchus MykissWalbaum) and Production of All-Female Populations

Atar

Bekcan

Doğankaya

2009

Biotechnology & Biotechnological Equipment

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Hormonal sex reversal of Atlantic halibut (Hippoglossus hippoglossus L.)

Cited by 59 publications

References 21 publications

Production of all male population of Indian catfish Heteropneustes fossilis (Bloch) by immersion and oral treatment of 17α-methyltestosterone

Production of all male population of Indian catfish Heteropneustes fossilis (Bloch) by immersion and oral treatment of 17α-methyltestosterone

Gonadal differentiation in Atlantic cod, <I>Gadus morhua</I> L., and haddock, <I>Melanogrammus aeglefinus</I> (L.)

Effects of Different Hormones on Sex Reversal of Rainbow Trout (Oncorhynchus MykissWalbaum) and Production of All-Female Populations

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