Enhancement of spermiation in European sea bass (Dicentrarchus labrax) at the end of the reproductive season using GnRHa implants

Rainis, Simona; Mylonas, Constantinos C.; Kyriakou, Yiannos; Divanach, P.

doi:10.1016/s0044-8486(03)00028-0

Cited by 57 publications

(40 citation statements)

References 28 publications

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“…Concentration of sperm was determined by counting the number of spermatozoa in sample dilute with distilled water (100x) in a Burker haemocytometer, under 400x magnification (Rainis et al, 2003). Gonado-somatic index (GSI) was computed according to Dahlgren (1979) as:…”

Section: Evaluation Of Milt Qualitymentioning

confidence: 99%

Dietary Fluted Pumpkin (Telfairia occidentalis) Improves Reproductive Indices in Male African Catfish (Clarias gariepinus) Broodstock

Dada¹,

Ejete-Iroh²

2015

JAS

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The effect of dietary aqueous extract of fluted pumpkin (Telfairia occidentalis) leaf powder on growth and reproductive indices of male catfish, Clarias gariepinus bloodstocks was investigated. Fish fed experimental diets showed significantly improved reproductive indices over the control fish. Significantly higher (P < 0.05) gonadosomatic index was recorded for the fish fed diets of aqueous extract of T. occidentalis leaf powder compared to fish fed on control diet. These results revealed that supplement diets with medicinal plant (T. occidentalis) improve gonadosomatic index, and reproductive indices of male C. gariepinus broodstocks and this plant has a potential pro-fertility property which can be exploited in fish fingerling production by hatchery operators.

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Section: Evaluation Of Milt Qualitymentioning

confidence: 99%

Dietary Fluted Pumpkin (Telfairia occidentalis) Improves Reproductive Indices in Male African Catfish (Clarias gariepinus) Broodstock

Dada¹,

Ejete-Iroh²

2015

JAS

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“…Piironen & Hyvarinen (1983) found similar sperm densities in perch, ranging from 37 Â 10 9 to 127 Â 10 9 sperm ml ÿ1 , but without specifying the M of the examined fish. As body mass to milt volume ratio is subject to annual variation (P. Compared to other fish species (Piironen & Hyvarinen, 1983;Stockley et al, 1996;Mylonas et al, 2003;Rainis et al, 2003;Mansour et al, 2004), the average sperm density in perch is high and the variation between males is considerably large. Sperm density in externally fertilizing fish has been shown to be generally higher than in mammals or other internal fertilizers (Stockley et al, 1997;Petersen & Warner, 1998;Byrne et al, 2002).…”

Section: S P E R M C H a R A C T E R I S T I C S I N P E R C H 1897mentioning

confidence: 99%

Sperm characteristics in perch Perca fluviatilis L.

Wirtz

Steinmann

2006

Journal of Fish Biology

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“…This gland controls synthesis and release of the gonadotropic hormones (GtHs), whose role is to lead the gonads (ovaries and testicles) to produce the gametes. The pituitary gland produces also dopamine, which, on the contrary, has an inhibiting effect on the process (Rainis et al, 2003) (Figure 1).…”

Section: The Reproductive Cycles In Fishmentioning

confidence: 99%

“…The lack of natural environmental stimuli, and the unavoidable stress by captivity, often causes the lack of the final oocyte maturation stage (FOM) and of ovulation in females, inhibiting also their natural spawning. In males, instead, a decrease of the seminal liquid volume and a worsening of its quality can be observed (Rainis et al, 2003). After isolation of hypothalamus LH-releasing factors by Matsuo et al, 1971), this decapeptide named LHRH, its primary structure was identified.…”

Section: Introductionmentioning

confidence: 99%

The mechanism of reproduction and hormonal function in finfish species: A review

Yousefian¹,

Mousavi²

2011

Sci. Res. Essays

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The number of aquatic species currently under domestication efforts is rising rapidly, due to the development of commercial aquaculture. For domestication and the establishment of a sustainable aquaculture industry, the control reproduction processes of fish in captivity, and to acquire high quality seed, is necessary. The fish reproductive cycle is separated in gametogenesis (of growth) and oocyte maturation and spermiation (of maturation). These are controled by the reproductive hormones of the brain, pituitary and gonad. Environmental and endogenous physiological information reach neuroendocrine system that regulates pituitary and gonadal functions. The most commonly reproduction dysfunctions in cultured fish are the unpredictability of final oocyte maturation (FOM) in females, and the lack and less quality of sperm in males. These problems are due to the fact that the fish in captivity does not have the same conditions in the spawning grounds, and as a result, there is a failure of the proper hormonal regulation. Failure of the pituitary to release gonadotropin (GTH-II), one of the hormones involved in the regulation of reproduction, is the result of unsucssesful ovulation. Actually two type of GTH are identified. They are differing from structural and chemical roles. GTH-I also name as FSH, involve in vitellogenesis or spermatogenesis (initial stage of gametogenesis), and GTH-II name as LH are involve in FOM and spermiogenesis and spermiation.The control role and function of the hormone involve in reproduction are described and reviewed in the present paper.

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Enhancement of spermiation in European sea bass (Dicentrarchus labrax) at the end of the reproductive season using GnRHa implants

Cited by 57 publications

References 28 publications

Dietary Fluted Pumpkin (Telfairia occidentalis) Improves Reproductive Indices in Male African Catfish (Clarias gariepinus) Broodstock

Dietary Fluted Pumpkin (Telfairia occidentalis) Improves Reproductive Indices in Male African Catfish (Clarias gariepinus) Broodstock

Sperm characteristics in perch Perca fluviatilis L.

The mechanism of reproduction and hormonal function in finfish species: A review

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