Effect of sublethal concentrations of fuel oil on the behavior and survival of Larvae and adults of the barnacle Balanus amphitrite amphitrite (Darwin)

Balanus amphitrite amphitrite’in farklı gelişim evreleri kullanılarak petrol hidrokarbonların (akaryakıt) ölümcül olmayan etkisi araştırılmıştır. Suda çözünen akaryakıtların 5, 10, 15 ve 20 ppm’lik konsantrasyonları uygulanan organizmanın davranışı ve yaşama oranı üzerinde anlamlı etkisi olduğu görülmüştür. II. larva evresi, diğer evrelerden daha hassas olmuş ve en düşük hidrokarbon (5 ppm) konsantrasyonundan dahi etkilenmiştir. Cirri beat sayısında değişiklik yapılarak da belirtildiği gibi, cirri hareketleri üzerindeki etkileri sebebiyle erginlerin beslenme faaliyeti akaryakıttan etkilenmiştir. 15 ve 20 ppm’lik konsantrasyonlarda cirri hareket etmeyi bırakmış ve organizmalar ölmüştür. Organizmaların dokusu üzerinde hidrokarbonların biriktiği tespit edilmiş ve en fazla akümülasyon, 240 μg/g kuru ağırlığa eriştiği 15 ppm’lik konsantrasyonda (48 saatlik maruziyet süresinden sonra) olmuştur. 96 saatlik uygulama sonrasında yalnızca 5 ppm’e maruz kalmış olan erginler kurtarılmıştır. Çalışma yapılan alanda sürekli kirliliğin olması sebebiyle organizma dokusu üzerinde her zaman 55 μg/g’a ulaşan petrol hidrokarbonlar bulunmaktadır. Fakat kaya midyesi 100 μg/g’ye kadar tolere edebilmektedir.

Anahtar Kelimeler:

yakıt yağlar, yaşayabilme, su kirliliği, su kalitesi, sucul eklem bacaklılar, Balanus, petrol hidrokarbonları, kirli sular

Ölümcül olmayan akaryakıt konsantrasyonlarının kaya midyesinin Balanus amphitrite amphitrite (Darwin) larvası ve erginlerinin davranışları ve yaşama oranı üzerindeki etkisi

The sublethal effect of petroleum hydrocarbons (fuel oil) was investigated using different developmental stages of Balanus amphitrite amphitrite. 5, 10, 15 and 20 ppm concentrations of the water soluble fraction of the fuel oil were applied and found to have significant effect on the behavior and survival of the organism. Larval stage II was more sensitive than the other stages and was affected even with the lowest concentration of hydrocarbons (5 ppm). Nutritional activity of the adults was affected by fuel oils due to effects on the movements of the cirri as indicated by altering the number of cirri beats. At 15 and 20 ppm concentration, cirri stopped moving and the organisms died. Accumulation of the hydrocarbons in the tissues of organisms’ was determined and was the highest at 15 ppm concentration (after 48 hours exposure time) where it reached 240 μg/g dry weight. After 96 hours of exposure, only adults exposed to 5 ppm could be recovered. Due to continuous pollution in the study area, there have always been petroleum hydrocarbons in the organisms tissue which reach 55 μg/g, but the barnacles can tolerate up to 100 μg/g.

Keywords:

fuel oils, survival, water pollution, water quality, aquatic arthropods, Balanus, petroleum hydrocarbons, polluted water,

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