Genetic influences on reproductive system development and function: A review

Schreibman, Martin P.; Holtzman, Seymour; Eckhardt, Ronald A.

doi:10.1007/bf00004712

Cited by 4 publications

(1 citation statement)

References 26 publications

(21 reference statements)

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“…Since egg size increases with maternal age and size, fish maturing early and at a smaller size will produce relatively more but smaller eggs per unit body weight than larger fish (Coward and Bromage, 1999). There is a decrease in the growth rate during the time of sexual maturity, and as a consequence of this, late maturing fish are larger than their early maturing counterparts (Schreibman et al, 1989). Species like tilapia exhibit early sexual maturation, which result in the overcrowding of and stunted growth observed in tilapia culture systems.…”

Section: Tilapia Sexual Maturationmentioning

confidence: 99%

Use of Pawpaw (<i>Carica papaya</i>) Seed in Tilapia Sex Reversal

Omeje

Lambrechts

Brink

2020

RAS

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Tilapia breeds effortlessly in captivity, with this attribute which is considered as the "Achilles heel" of the species, because it predisposes pond systems to overcrowding and low weight at harvest. Efforts to mitigate this shortcoming include mono-sex culture using exogenous hormone to reverse the sex of sexually undifferentiated fish. This is premised on the fact that improvement in the growth by mono-sex culture will lead to shortened production times and a more uniform weight at harvest, which will ultimately benefit the producers. However, the use of exogenous hormones in aquaculture has recently raised concerns about the effect on farm workers, consumers and on the environment. Recently research has focused on the use of substances of plants origin which mimic the action of hormones as a potential approach to achieve sex reversal in fish. Pawpaw (Carica papaya) seed contains phytochemicals that hold great promise as a sex reversal and a reproductive inhibition agent in aquaculture. The purpose of this study was to conduct a systematic review of the relevant literature on the possibility of using a less harmful phytochemicals abundant in the plant to effect sex reversal of sexually undifferentiated tilapia.

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Section: Tilapia Sexual Maturationmentioning

confidence: 99%

Use of Pawpaw (<i>Carica papaya</i>) Seed in Tilapia Sex Reversal

Omeje

Lambrechts

Brink

2020

RAS

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The distribution of neuropeptide Y and dynorphin immunoreactivity in the brain and pituitary gland of the platyfish, Xiphophorus maculatus, from birth to sexual maturity

Cepriano

Schreibman

1993

Cell Tissue Res

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Immunoreactive neuropeptide Y and dynorphin have been localized in the brain and pituitary gland of the platyfish, Xiphophorus maculatus, at different ages and stages of development from birth to sexual maturity. Immunoreactive neuropeptide Y was found in perikarya and tracts of the nucleus olfactoretinalis, telencephalon, ventral tegmentum and in the neurohypophysis and in the three regions of the adenohypophysis. Immunoreactive dynorphin was found in nerve tracts in the olfactory bulb and in cells of the pars intermedia and the rostral pars distalis of the pituitary gland.

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