Stimulation of ovulation in African catfish Clarias gariepinus (Burchell 1822) following treatment with carp pituitary homogenate, Ovopel or Dagin

• Autorzy: Brzuska E.

Warianty tytułu

PL

Stymulowanie owulacji u suma afrykańskiego Clarias gariepinus (Burchell 1822) homogenatem przysadki karpia, Ovopelem lub Daginem

• Języki publikacji: EN

Abstrakty

EN

Effects on the reproduction of C. gariepinus after ovulation stimulation with carp pituitary homogenate (CPH), Ovopel or Dagin were investigated. After the application of Ovopel all the females spawned while after CPH or Dagin treatment spawning was reduced to 83.3%. No statistically significant effect of the stimulator was found on the weight of eggs expressed in g and in % of female B.W. however, the highest mean values of these parameters were found after Dagin. A statistically significant effect of the stimulator was noted for the percentage of fertilization and living embryos after 24h and 28h incubation. The highest percentage of live embryos after a 28h incubation of eggs was found after the treatment with Dagin and the lowest after Ovopel; the difference between the means of these stimulators was statistically significant. The females ovulated 12h after Ovopel treatment yielded eggs of a higher weight and of significantly higher quality compared with those obtained 3h later. The relative effectiveness of reproduction, expressed as the number of live embryos per kg of female B.W., was highest after Dagin treatment.

PL

Badano wyniki rozrodu suma afrykańskiego C. gariepinus po stymulowaniu owulacji homogenatem przysadki karpia (CPH), Ovopelem lub Daginem. Po podaniu Ovopelu ikrę oddały wszystkie samice, a po zastosowaniu CPH lub Daginu 83.3% ryb. Nie odnotowano statystycznie istotnego wpływu stymulatora na masę pozyskanej ikry, wyrażonej zarówno w gramach, jak i w procencie masy ciała samic, ale najwyższe wartości tych parametrów wykazano po podaniu Daginu. Statystycznie istotny wpływ stymulatora owulacji odnotowano dla procentu zapłodnienia i żywych zarodków po 24 i 28 godz. inkubacji jaj. Najwyższy procent żywych zarodków po 28 godz. inkubacji jaj wykazano po podaniu Daginu, a najniższy po użyciu Ovopelu; różnica między średnimi dla tych stymulatorów była statystycznie istotna. Samice, które owulowały 12 godz. po podaniu Ovopelu, oddały ikrę w większej masie i istotnie lepszej jakości w porównaniu z ikrą pozyskaną od ryb, które owulowały 3 godziny później. Relatywna efektywność rozrodu, wyrażona jako liczba żywych zarodków na 1 kg masy ciała samic, była najwyższa po podaniu Daginu.

Słowa kluczowe

EN

artificial spawning; spawning; stimulation; ovulation; fish; African catfish; Clarias gariepinus; carp pituitary homogenate; Ovopel; Dagin; treatment

• Wydawca: -
• Czasopismo: Polish Journal of Natural Sciences
• Rocznik: 2011
• Tom: 26
• Numer: 2
• Opis fizyczny: p.121-137,ref.

Twórcy

autor

Brzuska E.

• Institute of Ichthyobiology and Aquaculture in Golysz, Polish Academy of Sciences, Kalinowa 2, 43-520 Chybie, Poland

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