Fethiye Yöresinde Yetiştirilen Gökkuşağı Alabalıklarının (Oncorhynchus mykiss, Walbaum 1792) Doğal Radyoaktivite Düzeyleri

Year 2019, Volume: 15 Issue: 4, 517 - 523, 16.12.2019

Süleyman Fatih Özmen Mesut Yılmaz

https://doi.org/10.22392/actaquatr.561514

Cited By: 1

Abstract

Bu çalışmada Fethiye yöresinde
yetiştirilen gökkuşağı alabalıklarının farklı dokularındaki doğal radyonüklit (²²⁶Ra, ²³²Th
ve ⁴⁰K) konsantrasyonları belirlenmiştir. Bu amaçla 4 farklı
çiftlikten yaklaşık aynı boylarda olan porsiyonluk balıklar alınarak solungaç,
karaciğer, deri ve kas dokuları ayrılmıştır. İşletmelerin kullandığı
porsiyonluk balık yemleri de örneklenmiştir.  Numunelerin yüksek çözünürlüklü germanyum
dedektörü ile gama spektrometrik ölçümleri gerçekleştirilmiş ve radyolojik risk
faktörleri değerlendirilmiştir. Alabalık örneklerinin yenilebilen kısımlarında ²²⁶Ra
aktivitesinin 1,47±0,14-8,26±0,78 Bq kg^-1, ²³²Th aktivitesinin
ÖSA-3.38±0.30 Bq kg^-1
ve ⁴⁰K aktivitesinin 54,94±2,23-140,86±5,82 Bq kg^-1
aralığında değiştiği gözlenmiştir. Örneklerin radyum eşdeğer aktivitesi ve
yıllık etkin dozu sırasıyla 6,45-23,94 Bq
kg^-1 ve 1,87-4,80 µSv
y^-1 olarak
hesaplanmıştır. Elde edilen bulgular balık yetiştiriciliği için referans oluşturması
bakımından önemlidir.

Keywords

Alabalık, yetiştiricilik, doğal radyoaktivite, HPGe, Oncorhynchus mykiss

Natural Radioactivity Levels of Rainbow Trout (Oncorhynchus mykiss, Walbaum 1792) Grown in Fethiye Region

Abstract

In this study, natural radionuclide (226Ra, 232Th and 40K) concentrations were determined in different tissues of rainbow
trout grown in Fethiye region. For this purpose, approximately the same size of portioned fish were taken from four different
farms and then gill, liver, skin and muscle tissues were separated. Portion fish feeds used by enterprises are also exemplified.
Gamma spectrometric measurements were performed with high purity germanium detector and radiological risk factors were
evaluated. It was observed that 226Ra activity in the edible parts of trout samples varied between 1.47±0.14-8.26±0.78 Bq kg-1
,
232Th activity varied between BDL-3.38±0.30 Bq kg-1
and 40K activity in the range of 54.94±2.23-140.86±5.82 Bq kg-1
. The
radium equivalent activity and annual effective dose of the samples were calculated as 6.45-23.94 Bq kg-1 and 1.87-4.80 µSv
year-1
, respectively. The findings are important in terms of forming a reference for fish farming.

Keywords

Rainbow trout, aquaculture, natural radioactivity, HPGe

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