In this study, 24 carps (Cyprinus carpio Lin.,1758) caught from Çavuşçu Lake (Konya; 36°41´N, 34°26´E) were examined for metazoan parasites. Infestation rate of Argulus foliaceus Lin.,1758 was found to be . | Turk J Biol 34 (2010) 147-151 © TÜBİTAK doi: A study on the morphology of Argulus foliaceus Lin., 1758 (Crustacea; Branchiura) procured from Çavuşcu Lake (Central Anatolia-Turkey) with scanning electron microscopy Ali ALAŞ 1,*, Ahmet ÖKTENER2, Kemal SOLAK3 1 Department of Science Education, Faculty of Education, Aksaray University, 68100, Aksaray - TURKEY 2İstanbul Provincial Directorate of Agriculture, Directorate of Control, Kumkapı Fish Auction Hall, Aquaculture Office, Kumkapı, 34130 İstanbul - TURKEY 3Department of Biology, Gazi Faculty of Education, Gazi University, 06500-Teknikokullar, Ankara - TURKEY Received: Abstract: In this study, 24 carps (Cyprinus carpio Lin.,1758) caught from Çavuşçu Lake (Konya; 36°41´N, 34°26´E) were examined for metazoan parasites. Infestation rate of Argulus foliaceus Lin.,1758 was found to be . In addition, Argulus foliaceus was photographed using a scanning electron microscope (SEM) and a light microscope. Key words: Çavuşçu Lake, Cyprinus carpio, fish louse, Argulus foliaceus, SEM Çavuşcu Gölü (İç Anadolu-Türkiye)’den temin edilen Argulus foliaceus Lin., 1758 (Crustacea; Branchiura)’un morfolojisi üzerine scanning electron mikroskop çalışması Özet: Bu çalışmada, Çavuşçu Gölü (Konya; 36°41´N, 34°26´E)’nden yakalanan 24 Cyprinus carpio Lin.,1758’nun Metazoon parazitleri incelenmiştir. İncelenen balıklarda Argulus foliaceus Lin.,1758’un enfestasyon oranının % 45,8 olduğu belirlenmiştir. Ayrıca, Argulus foliaceus scanning electron microskobu (SEM) ve ışık mikroskobu ile fotoğraflanmıştır. Anahtar sözcükler: Çavuşçu Gölü, Cyprinus carpio, balık biti, Argulus foliaceus, SEM Introduction The freshwater fish louse, Argulus foliaceus L.,1758 (Crustacea, Branchiura) is a branchiuran parasite occurring on a wide range of fish species and has also been reported from amphibians (1,2). It feeds by piercing the skin of their hosts, injecting a toxin, and drawing off blood (3,4). Heavy infestations