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

2011 ◽  
Vol 49 (No. 7) ◽  
pp. 289-296 ◽  
Author(s):  
E. Brzuska
Keyword(s):  
Body Weight ◽  
Single Dose ◽  
Receptor Antagonist ◽  
Dopamine Receptor ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
Gnrh Analogue ◽  
Dopamine Receptor Antagonist ◽  
Pituitary Homogenate

The effects on reproduction of African catfish (Clarias gariepinus Burchell 1822) were investigated in three experiments conducted under controlled conditions, carp pituitary (at the dose of 4 mg/kg body weight) or Ovopel – a preparation that contains a mammalian GnRH analogue D-Ala6,Pro9NEt-mGnRH (1 pellet/kg body weight) and dopamine receptor antagonist metoclopramide (10 mg/kg) being used as ovulation stimulators. The application of Ovopel induced the statistically significantly (P ≤ 0.01) higher weight of eggs per kg female body weight and the statistically significantly (P ≤ 0.05) higher quality of eggs after 24 h incubation in comparison with the effects of hypophysation. No effect of the experiment on the weight or quality of obtained eggs was determined while the interaction between the experiment and the ovulation stimulator was statistically significant (P ≤ 0.05) with respect to the percentage of egg fertilization. Statistically significant (P ≤ 0.05) correlation was found between the percentage of egg fertilization and that of living embryos, the determined correlation coefficient being higher after the application of Ovopel than after the carp pituitary homogenate.  

scholarly journals The application of [D-Tle6,ProNHEt9]mGnRH (Lecirelin) with the dopaminergic inhibitor metoclopramide to stimulate ovulation in African catfish (Clarias gariepinus)

2011 ◽  
Vol 49 (No. 7) ◽  
pp. 297-306 ◽  
Author(s):  
E. Brzuska ◽  
J. Kouřil ◽  
J. Adamek ◽  
Z. Stupka ◽  
V. Bekh
Keyword(s):  
Body Weight ◽  
Female Body ◽  
Clarias Gariepinus ◽  
The Body ◽  
African Catfish ◽  
Average Body ◽  
Stimulation Of ◽  
Average Body Weight ◽  
Pituitary Homogenate

The results of reproduction were tested in females of the African catfish (Clarias gariepinus Burchell 1822) after stimulation of ovulation with carp pituitary (4 mg/kg body weight) or with Lecirelin (15 μg/kg) and metoclopramide (10 mg/kg). After administering the synthetic substance eggs were obtained from all females while in the group treated with pituitary homogenate 7 out of 8 hypophysed females spawned. The applied spawning agent did not significantly influence the weight of eggs expressed in grams, but in the case of females treated with carp pituitary homogenate a significantly higher weight of eggs expressed as the percentage of body weight of fish was recorded. The applied stimulators of ovulation did not affect any trait reflecting the quality of eggs. Females used as an experimental material belonged to two categories in respect of body weight: lighter females with average body weight of 2.63 ± 0.36 kg and heavier females with average body weight of 3.91 ± 0.48 kg. It was proved that the weight of eggs expressed either in grams or as a percentage of a female’s weight was significantly related to the body weight of a female (P ≤ 0.01 and P ≤ 0.05, respectively), as well as the percentage of fertilised eggs and the percentage of living embryos after 28 hours of incubation (P ≤ 0.05 and P ≤ 0.05, respectively). The interaction between the stimulator of ovulation and the female body weight was significant only for traits reflecting the weight of obtained eggs (P ≤ 0.05 and P ≤ 0.01).  

scholarly journals Evaluation of the quality of chilled and frozen African catfish (Clarias gariepinus Burchell, 1822) fillets

2019 ◽  
Vol 37 (No. 3) ◽  
pp. 186-191
Author(s):  
Marlena Justyna Baryczka ◽  
Iwona Chwastowska-Siwiecka ◽  
Jacek Kondratowicz
Keyword(s):  
Body Weight ◽  
Moisture Content ◽  
Total Protein ◽  
Clarias Gariepinus ◽  
Cooking Loss ◽  
African Catfish ◽  
Catfish Fillets ◽  
Pre Treatment ◽  
Water Holding

The quality of chilled and frozen African catfish fillets was compared. The experiment was performed on 20 individuals of Clarias gariepinus aged < 1 year, with estimated body weight of 1 kg. A total of 40 right and left fillets were subjected to pre-treatment. Chilled right fillets (20) and left fillets (20) stored for 8 months in the freezer were subjected to quantitative and qualitative laboratory analyses. Chilled African catfish fillets had a lower of moisture content, higher of total protein, fat and crude ash, and higher energy value than frozen samples. Chilled fillets had also higher water-holding capacity, lower cooking loss and higher tenderness.

scholarly journals Dietary Effects of Tiger Nut (Cyperus esculentus) on Egg and Milt Quality of African Catfish (Clarias gariepinus) Broodstocks (Burchell, 1822)

2019 ◽  
pp. 1-12
Author(s):  
Adekunle Ayokanmi Dada ◽  
Gbajuola Gideon Oluwagbohunmi ◽  
Adedapo Adejoke Adeola ◽  
Oke Israel Opeyemi
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Gonadosomatic Index ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
Cyperus Esculentus ◽  
Highest Weight ◽  
Average Body ◽  
Average Body Weight

The dietary effect Tiger nut (Cyperus esculentus) seed powder was examined on the egg and milt quality of African catfish broodstock.45 Female catfish broodstock of average body weight, 475 ± 25.00g and male catfish broodstock of average body weight, 487.09±13.57 g. Five diets with crude protein of 40% were formulated with different inclusion levels of Cyperus esculentus seed powder; 0, 0.5, 1.0, 1.5, 2.0 g per 100 g of experimental diet (D1, D2 ,D3, D4 and D5). The experiment was carried out for 70 days and fish fed twice daily at 3% body weight. Fish fed experimental diets showed significantly improved growth performance and reproductive indices over the control treatment. Fish fed D3 had the highest weight gain (173.6±10.98) in female catfish while D5 had highest weight gain (215.17±11.62) in male catfish. Fish fed with D4 had the highest percentage fertilization (93.00±3.05) and percentage hatchability (85.00±2.64) in female catfish while in male catfish the highest percentage fertilization (94.00±1.29) and hatchability (79.17±10.09) was from D5. Percentage survival and gonadosomatic index was higher in fish fed D5 in both female and male catfish. Histology of fish fed with Cyperus esculentus diets revealed oocytes formation within the ovaries. Ovary of fish fed D1 showed primary oocytes, with primary yolk accumulation in the ovary of fish fed D2 and there were improvement in the oocytes. Fish fed D3, D4 and D5 showed more matured oocytes and ripe yolk of late maturing stage. There was reduced seminiferous tubular lumen and scanty spermatozoa in D1 and D2 and there was high spermatozoa density in the seminiferous lumen seen in the testicular histology of fish fed diets D3, D4 and D5. This result revealed that dietary inclusion of Cyperus esculentus seed powder enhance growth and improves fertility in Clarias gariepinus which will improve the quantitiy of its seed production.

scholarly journals Water Quality and Haematological Indices of Clarias gariepinus from Ogun River (Nigeria)

2015 ◽  
Vol 17 (2) ◽  
pp. 105-112
Author(s):  
Olaniyi Alaba Olopade ◽  
Iyabode Olusola Taiwo ◽  
Comfort Opeoluwa Oluwoleand ◽  
Justin Ayaegbunem Akankali
Keyword(s):  
Water Quality ◽  
Physicochemical Parameters ◽  
Clarias Gariepinus ◽  
Haematological Parameters ◽  
African Catfish ◽  
Effect Of Water ◽  
Almost All ◽  
Haematological Indices ◽  
Ogun River

Abstract This study was conducted to assess the effect of water quality of the Ogun River on the haematological indices of the African catfish Clarias gariepinus. Samples of water and Clarias gariepinus were collected from Ogun River (Station I, Opeji and Station II, Lafenwa) to determine and compare effects of possible differences in water quality on haematological parameters of Clarias gariepinus. The results demonstrate that higher index values were recorded at station II than Station I for almost all the physicochemical parameters and only sulphate values from Stations I and II were statistically significant (P < 0.05).

Sign in / Sign up

Export Citation Format

Share Document