Radiologic Risk Assessment of Farmed Shi Drum (Umbrina cirrosa Linnaeus, 1758)

Abstract

In this study, natural radionuclide (²²⁶Ra, ²³²Th and ⁴⁰K) concentrations were measured in edible part of shi drum grown in Muğla region and radiological risk assessment was performed. For this purpose, pan size fish were taken from the farm soon after harvesting and fillets were separated. Gamma spectrometric measurements of samples were performed with high resolution germanium detector and radiological risk factors were calculated. It was observed that the activities ranged from 0.63 to 4.60 Bq kg^-1 for ²²⁶Ra, from 0.29 to 4.14 Bq kg^-1 for ²³²Th and from 133.19 to 160.57 Bq kg^-1 for ⁴⁰K in edible parts of farmed shi drum. Radium equivalent activity and annual effective dose averages of the samples were calculated as 13,79 ± 0,62 Bq kg^-1 and 4,96 ± 0,07µSv y^-1, respectively. The findings are important in terms of forming database for shi drum grown in culture conditions.

Keywords

• Shi drum,aquaculture,natural radioactivity,HPGe,Umbrina cirrosa

Kültür Minekop Balığının (Umbrina cirrosa Linnaeus, 1758) Radyolojik Risk Değerlendirmesi

Abstract

Bu çalışmada Muğla bölgesinde yetiştirilen minekop balığının kas dokusunda doğal radyonüklit (²²⁶Ra, ²³²Th ve ⁴⁰K) konsantrasyonları ölçülerek radyolojik risk değerlendirmesi yapılmıştır. Bu amaçla yetiştiriciliğin yapıldığı çiftlikten porsiyonluk balıklar hasat sonrası alınarak kas dokuları ayrılmıştır. Numunelerin yüksek çözünürlüklü germanyum dedektörü ile gama spektrometrik ölçümleri gerçekleştirilmiş ve radyolojik risk faktörleri hesaplanmıştır. Çiftlikte yetiştirilen minekop balıklarının yenilebilen kısımlarında ²²⁶Ra aktivitesinin 0,63 ile 4,60 Bq kg^-1, ²³²Th aktivitesinin 0,29- 4,14 Bq kg^-1 ve ⁴⁰K aktivitesinin 133,19 – 160,57 Bq kg^-1 aralığında değiştiği gözlenmiştir. Örneklerin radyum eşdeğer aktivitesi ve yıllık etkin doz ortalamaları sırasıyla 13,79±0,62 Bq kg^-1 ve 4,96±0,07µSv y^-1 olarak hesaplanmıştır. Elde edilen bulgular kültür koşullarında yetiştirilen minekop balıkları için referans oluşturması bakımından önemlidir. 

Keywords

• Minekop,Su ürünleri yetiştiriciliği,Doğal radyoaktivite,HPGe,Umbrina cirrosa

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