Effects of eyestalk ablations on growth and ovarian maturation of the freshwater prawn Macrobrachium lanchesteri (de Man)

Macrobrachium lanchesteri’de tek yanlı ve iki yanlı göz sapı kesim (ablasyon) yönteminin; büyüme, yumurtalığın olgunlaşması, karbonhidrat, protein ve enerji içeriğinin üzerindeki etkileri araştırılmıştır. Hem günlük büyüme hem de yumurtalık olgunluğu; bu karideslerde göz sapı kesimiyle birlikte hızlanmıştır. Kesilmiş karideslerde ölüm, intakt (kesilmemiş) olanlardan daha fazla olmuştur. Karbonhidrat ve protein gibi biyokimyasal bileşenler göz sapı kesimiyle değişmiştir. Göz sapı hormonları olmadığından, farklı dokulara ait enerji içeriği de bazı değişiklikler göstermiştir. Tatlı su karidesinin bilhassa bu türünde hızlı büyümeyi ve yumurtlamayı tetiklemek için göz sapı kesimi, özellikle de tek yanlı göz sapı kesimi kullanılabilir.

Anahtar Kelimeler:

enerji içeriği, iri karides, protein içeriği, cerrahi işlemler, yumurtalık gelişimi

Göz sapı kesim yönteminin tatlı su karidesinin Macrobrachium lanchesteri (de Man) büyümesi ve yumurtalığının (ovarium) olgunlaşması üzerindeki etkileri

The effects of unilateral and bilateral eyestalk ablations on growth, ovarian maturation, carbohydrate, protein and energy contents were investigated in Macrobrachium lanchesteri (de Man). Daily growth as well as ovarian maturation were accelerated by eyestalk ablation in these prawns. The mortality in ablated prawns was more than that of intact ones. The biochemical components like carbohydrate and protein were altered by eyestalk ablations. The energy content of the different tissues were also showing some variations due to the absence of eyestalk hormones. Eyestalk ablation, especially unilateral eyestalk ablation could be used for inducing rapid growth and spawning in this particular species of freshwater prawns.

Keywords:

energy content, prawns, protein content, surgical operations, ovarian development,

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