Artificial propagation of African catfish (Clarias gariepinus): the application of a single dose of pellets containing D-Ala6,Pro9NEt-mGnRH and dopamine inhibitor metoclopramide

Brzuska, E

doi:10.17221/4312-cjas

Cited by 17 publications

(10 citation statements)

References 20 publications

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“…The relative amount of stripped eggs (PGSI) for the group of females reared in pond conditions are comparable to those reported by other authors (Brzuska and Adamek, 1999;Brzuska, 2001;2003).…”

Section: Discussionsupporting

confidence: 87%

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Szabó¹,

Radics²,

Borsos³

et al. 2015

Turk. J. Fish. Aquat. Sci.

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European catfish, Silurus glanis, is an important species for aquaculture in temperate climates. At present, its production relies mainly on pond culture. However, European catfish could be a promising candidate for intensive aquaculture since it has a high growth rate on commercial diet, is resistant to handling and has relatively low requirement for water quality. In this study we compared the results from induced breeding of European catfish broodstock reared in an intensive system or in a pond environment.Induced breeding experiments were conducted in two consecutive spawning seasons using European catfish broodstocks with different origins. One broodstock was cultured in an intensive system, while the other was reared in artificial pond conditions. One day before the experiments, fish were transferred to the hatchery and placed in 4.0 m 3 polypropylene tanks with running water. One experimental group contained fish cultured in an intensive system, while the other consisted of fish reared in pond conditions. Fish in both groups received an injection of dry carp pituitary administered in 0.7% NaCl at a dose of 4.0 mg kg -1 body weight. Assessment of ovulation was carried out by determining the ovulation ratio (number of ovulated females / number injected) and by the pseudo-gonadosomatic index (PGSI) calculated as follows: (weight of stripped egg mass / body weight of the female before stripping)  100. When ovulation was detected, the eggs were stripped and weighed. Fertilization rate of the eggs was used as a parameter for egg quality.In both spawning seasons, five out of six females reared in pond conditions ovulated after the treatment, while pituitary injection induced ovulation in all females cultured in an intensive system. Mean fertilization rates for the two groups were high and statistically similar in both seasons (P>0.05). The mean PGSI values, however, were significantly higher (P<0.05) for the females cultured in the intensive system in both seasons. In conclusion, this study shows that European catfish females reared in intensive conditions from larval stage to maturity at constant temperature of 21.0±1.0°C can be induced to ovulate by pituitary injection. The reason for the high relative fecundity of these females was probably the constant temperature that secured continuous ovarian development all year round. Results from the propagation of fish reared in pond conditions were similar to those from hatchery breeding of European catfish that has been carried out routinely for years.

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Section: Discussionsupporting

confidence: 87%

“…According to our results, artificial conditions at the fish culture station of Szarvas Fish Ltd. did not have any negative impact on egg quality. Mean fertilization rate values from our experiments are also comparable to those from other breeding experiments on the European catfish (Brzuska and Adamek, 1999;Brzuska, 2001;2003).…”

Section: Discussionsupporting

confidence: 85%

Untitled

Szabó¹,

Radics²,

Borsos³

et al. 2015

Turk. J. Fish. Aquat. Sci.

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“…The preparation containing mammalian GnRH analogue and metoclopramide was completely ineffective in jundiá though it has been successfully used in breeding cyprinids (Horváth, Szabó & Burke ; Kucharczyk, Targońska, Hliwa, Gomułka, Kwiatkowski, Krejszeff & Perkowski ). Ovopel has also been successfully used to induce ovulation in European catfish ( Silurus glanis ) (Brzuska ) and African catfish ( Clarias gariepinus ) (Brzuska ).…”

Section: Resultsmentioning

confidence: 99%

Ovulation induction in jundiá (Rhamdia quelen, Heptapteridae) using carp pituitary extract or salmon GnRH analogue combined with dopamine receptor antagonists

Ittzés

Szabó

Kronbauer³

et al. 2014

Aquac Res

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Jundi a (Rhamdia quelen) is an important species for aquaculture in temperate and subtropical climates. In the present study, the results of different forms of GnRH analogue treatments on ovulation in jundi a have been compared with those from treatment with carp pituitary. Seven out of eight females ovulated in groups treated with carp pituitary (4.0 mg kg À1 BW) and Ovaprim (0.5 mL kg À1 BW). Injection with sGnRHa (10 lg kg À1 BW) combined with metoclopramide (20 mg kg À1 BW) caused a significantly lower rate of ovulation with three out of eight females responding. None of the fish injected with sGnRHa (10 lg kg À1 BW) alone ovulated. Mean PGSI [(weight of stripped egg mass/ BW of the female before stripping) 9 100] and mean fertilization rate values were high and similar between treatment groups. The obtained results indicate that in jundi a, there is a strong dopamine inhibitory tone on gonadotropin secretion. The gonadotropin releasing activity of sGnRHa can be potentiated by dopamine receptor antagonists and the combined treatment is effective in inducing ovulation. In this regard, domperidone proved to be more potent than metoclopramide.

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“…Demand for fish in both rural and urban areas is very high and continues to grow in Tanzania by FAO in 2007 [1]. The African catfish (Clarias gariepinus) has gained popularity in the aquaculture sector of Tanzania in the recent times [2,3]. Its demand has increased as food, control of over-population in tilapia ponds and as bait for the Nile perch fishery [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Catfish Pituitary Gland Extract Dosages on Eggs and Hatchlings Quantity of African Catfish, Clarias gariepinus at a Constant Latency Period

Moshaand¹,

Mlingi²

2018

J Aquac Res Development

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An experiment was conducted to assess the effects of different dosages of catfish pituitary glands extract (CPGE) on eggs and hatchlings quantity of African catfish, Clarias gariepinus at a constant latency period. In this experiment, four dosages (2 mg/kg, 3 mg/kg, 4 mg/kg and 5 mg/kg of female) were used. Each dosage extracted from a male (300 g to 305 g) was injected to individual female (350 g to 355 g) at three replications and a total of 12 females were injected. The females were striped after 17 hour at 26°C to 28°C, eggs were counted and incubated. After for 24 hours of incubation at 26°C to 28°C, all hatchlings were counted and recorded. The results indicated that there were significant differences (P<0.05) among the dosages on egg and hatchlings quantity. Egg weight, egg number and percentage egg weight were significantly (P<0.05) higher in dosage three (4 mg/kg) compared to other treatments. Total hatchlings and percentage hatchlings produced from striped females were significantly (P<0.05) higher compared to other dosages. In conclusion, the experiment indicated that higher eggs and hatchlings quantity at a constant latency period are attained with 4 mg/kg of female. Therefore, it is recommended that for better induction of ovulation in African catfish, 4 mg/kg of female pituitary gland extract should be used as suggested by this study.

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Artificial propagation of African catfish (Clarias gariepinus): the application of a single dose of pellets containing D-Ala6,Pro9NEt-mGnRH and dopamine inhibitor metoclopramide

Cited by 17 publications

References 20 publications

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Ovulation induction in jundiá (Rhamdia quelen, Heptapteridae) using carp pituitary extract or salmon GnRH analogue combined with dopamine receptor antagonists

Effects of Different Catfish Pituitary Gland Extract Dosages on Eggs and Hatchlings Quantity of African Catfish, Clarias gariepinus at a Constant Latency Period

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