The Effects on Growth, Oxidative stress, Vitamin A, E, C and Beta Caroten of Vitamin E and C Added to the Ration of Freshwater Crayfish (Astacus leptodactylus, Esch. 1823) in Moulting Period

Abstract

In this study, it was examined the effects of dietary antioxidant (vitamin E (VE), vitamin C (VC)) which supplemented on crayfish Astacus Leptodactylus diets during moulting on survival rate, live weight gain, specific growth rate, oxidative stress in hepatopancreas, muscle and gills tissues (malondialdehyde (MDA)), vitamins A, E, C, amount of β-carotene and astaxanthin. For this aim, a control diet (K) containing 38% crude protein was prepared. Crayfish of the experimental E (DE), experimental C (DC) and experimental DC (DEC) groups were respectively fed by adding the 150 mg kg-1 vitamin E, 200 mg kg-1 vitamin C and 150 mg kg-1 and vitamin E /200 mg kg-1 vitamin C in this ration. At the end of the study, it was determined that the supplemental of antioxidants in the diet decreased MDA levels in the tissues during moult, but it wasn't effected on the growth. It was assigned that the levels of vitamin E, C, A, beta-carotene, and astaxanthin were high in the tissues of crayfish in the DE, DC and DEC groups according to C group. It was determined that the addition of 150 mg kg-1 vitamin E to the diet during moulting is beneficial. Additionally, the meat quality of abdominal muscles of crayfish which consumed by people was also found to be reduced in a considerable amount during molting.

Keywords

• Astacus leptodactylus
• Carotenoid
• MDA
• Vitamin

Kabuk Değiştirme Döneminde Kerevit (Astacus leptodactylus, Esch. 1823) Yemine İlave Edilen Vitamin E ve C’nin Büyüme, Oksidatif Stres, Vitamin A, E, C ve Beta Karoten Üzerine Etkileri

Öz

Bu araştırmada; kabuk değiştirme döneminde olan Astacus leptodactylus türü kerevitlerin yemine ilave edilen antioksidanların (vitamin E, C) yaşama oranı, canlı ağırlık artışı, spesifik büyüme oranı, hepatopankreas, kas ve solungaç dokularındaki oxidatif stres (malondialdehit (MDA)), vitamins A, E, C, beta karoten ve astaksantin miktarı üzerine etkileri incelenmiştir. Bu amaçla %38 oranında ham protein içeren bir kontrol rasyonu (K) düzenlenmiştir. Bu rasyona 150 mg kg^-1 vitamin E, 200 mg kg^-1 vitamin C ve 150 mg kg^-1 vitamin E/200 mg kg^-1 vitamin C ilave edilerek sırasıyla deneme E (DE), deneme C (DC) ve deneme DEC (DEC) grupları beslenmiştir. Çalışma sonunda; yeme ilave edilen antioksidan maddelerin kerevitlerin kabuk değiştirme döneminde dokulardaki MDA değerini düşürdüğü ancak büyüme üzerine etkili olmadığı belirlenmiştir. Kontrol grubuna oranla DE, DC ve DEC grubundaki kerevitlerin dokularındaki vitamin E, C, A, beta karoten ve astaksantin miktarlarının yüksek olduğu tespit edilmiştir. Kabuk değiştirme döneminde 150 mg kg^-1 vitamin E’nin yeme ilave edilmesinin yararlı olacağı belirlenmiştir. Ayrıca insanlar tarafından tüketilen kerevitlerin abdomen kasının et kalitesinin de kabuk değiştirme döneminde oldukça önemli miktarda azaldığı tespit edilmiştir.

Anahtar Kelimeler

• Astacus leptodactylus
• Karotenoid
• MDA
• Vitamin

Kaynakça

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