Hülya SAYGI, Haşmet ÇAĞIRGAN, Erol TOKŞEN, Tansel T. TANRIKUL

The effect of emamectin benzoate in the control of Lernanthropus kroyeri (van Beneden, 1851) (Lernanthropidae) infestations in cultured sea bass, Dicentrarchus labrax (Linnaeus, 1758)

Bu çalışmada, levrek balıklarında (Dicentrarchus labrax L) görülen Lernanthropus kroyeri (van Beneden, 1851) enfestasyonlarının tedavisinde kullanılan emamektin benzoatın etkisinin değerledirilmesi amacıyla farklı dozlar uygulanan beş grup oluşturuldu. Emamektin benzoat bu gruplara 7 gün süreyle yem içinde 0 (kontrol), 10, 25, 50 and 100 ug kg"1 dozlarında verildi. Denemenin yapıldığı suyun sıcaklığı 16-16,5 °C olarak tespit edildi. Emamektin benzoate ile yapılan tedavinin L kroyerfnin larva ve erişkin evrelerine karşı etkili olduğu bulundu. Tedavinin uygulandığı süre içinde 10, 25, 50 and 100 ug kg"1 dozlarında ilaç verilen gruplarda parazit sayısı, sırasıyla % 55, 50, 43 and 74 azalırken, aynı süre içinde control grubunda parazit sayısının % 8 arttığı belirlendi. Denenen bütün dozlarda, emamektin benzoate ile yapılan tedavi nedeniyle gruplar arasında büyüme ve ölüm oranı bakımından fark bulunmadı (P > 0,05).

Yetiştiriciliği yapılan levrek balıklarında Dicentrarchus labrax (Linnaeus, 1758) Lernanthropuskroyeri (van Beneden, 1851) (Lernanthropidae) enfestasyonlarının tedavisinde emamektin benzoatın etkisi

Five different dose groups were formed to evaluate the efficacy of emamectin benzoate as a treatment for Lernanthropus kroyeri (van Beneden, 1851) infestation in cultured sea bass Dicentrarchus labrax (L). Emamectin benzoate was administered in-feed at doses of 0 (control), 10, 25, 50, and 100 ug kg"1 biomass day"1 for 7 consecutive days. Parasites were counted on days 7, 14, and 21, and comparisons were made to untreated control fish. Seawater temperature was 16-16.5 °C. Treatment with emamectin benzoate was effective against larval and mature stages of L kroyeri. The number of L kroyeri in the control fish increased by 8% during the 21 days of the study, whereas their number decreased in the treated fish by 55%, 50%, 43%, and 74% at the dose of 10, 25, 50, and 100 ug kg"1, respectively. No differences were observed with respect to growth between the treatment groups and the control group, and no mortality was observed at the end of the study.

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