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Two new Dactylogyrus spp., D. angorae and D. turcicus have been described from the gills of the endemic cyprinid fishes, Capoeta angorae and C. mauricii from the Anatolian Region of Turkey. The shape of the anchors, hooks and the copulation organ of both species differ from those of the Dactylogyrus spp. found on other Capoeta species known from the Ponto-Caspian and Tigris-Euphrates regions.

Juvenile golden grey mullet, Liza aurata were collected from Sarıkum Lagoon Lake which connected to the Black Sea at Sinop, Turkey and examined for parasitic fauna. A total of 219 fish were investigated throughout a 1-year period. Parasite species recovered were Trichodina lepsii, T. puytoraci, Gyrodactylus sp., Ligophorus cephali, Ligophorus mediterraneus, Solostamenides mugilis, Ascocotyle sp. (metacercaria) and Ergasilus lizae. Overall infection prevalence (%) and mean intensity values were 95.9% and 412.65 ± 85.31 parasites per infected fish, respectively. Infection prevalence and mean intensity values for each parasite species in relation to season and fish size were also determined and discussed. While Ligophorus cephali and L. mediterraneus are new records for Turkish parasite fauna, the juvenile Liza aurata is a new host record for Ligophorus cephali and L. mediterraneus.

Aim of this study was to investigate the helminths and their monthly prevalence in 120 Blicca bjoerkna (white bream) in the Kocadere stream (Bursa province) from February 2005 to January 2006. As a result, 98.3% of B. bjoerkna were found to be infected with one or more helminth species and a total of 5 different helminth species were identified. The distribution of these parasites in B. bjoerkna and the average prevalence (annually) were as follows: Dactylogyrus sphyrna (24.2%), D. distinguendus (30.8%), Diplostomum spathaceum metacerceria (95.8%), Caryophyllaeus laticeps (2.5%) and Eustrongylides sp. larvae (8.3%).

In this study, the presence of metazoan ectoparasites on 7 Cyprinus carpio and 90 Cobitis simplicispinna from Lake Aksehir, Turkey were investigated between July 2004 and June 2005. Three parasite species were identified on the host fishes: Gyrodactylus elegans Nordmann, 1832 (42.9%, 293.6+/-482.0 parasite/fish) and Dactylogyrus extensus Mueller and Van Cleave, 1932 (85.7%, 9.8+/-6.8), were found on gills of C. carpio, and Gyrodactylus cobitis Bychowsky, 1933 (68.9%, 15.6+/-18.5) on gills and fins of C. simplicispinna. Of these species, G. cobitis is a new record for parasite fauna of Turkey. In addition, minimum-maximum and mean intensity of parasites and infection prevalence were determined using seasonal data and size distribution of the host fish.

In this paper, three separate instances of an association between an ectoparasite, Cyclocotyla bellones (Otto, 1821) (Monogenea: Diclidophoridae) and ectoparasitic isopods have been reported for the first time from the Aegean Sea coasts of Turkey. The isopods were all of the family Cymothoidae: Ceratothoa oestroides, C. parallela, Emetha audouini.

The aim of this study which was carried out from March 2003-February 2004 was to determine the parasites of carp (Cyprinus carpio L., 1758) inhabiting the Kovada Lake. During the study, a total of 63 common carps were caught in different regions of Kovada Lake each month and investigated parasitologically. In carps, the ectoparasite, Dactylogyrus minutus of Monogenea, was found and endoparasites; Bothriocephalus acheilognathi and Caryophyllaeus laticeps of Cestoda were found. The most common parasitic species was Dactylogyrus minutus.

This study was carried out to investigate the reasons for scale loss, hemorrhage and local lesions on the skin of cultured meagre (Argyrosomus regius Asso, 1801), that are an alternative to the sea bass and sea bream. All of the 40 fish examined (5.63 +/- 0.89 kg in weight, 91.3 +/- 3.6 cm in length) had parasites on the area with lesions and the parasite was identified as Benedenia sciaenae van Beneden, 1856 (Monogenea: Capsalidae) after examination. The dimensions of the parasite were measured and drawn. This is the first report of B. sciaenae in Turkey.

In this study, metazoan parasites of bream (Abramis brama Linnaeus, 1758) in the Lake Durusu (Terkos) were investigated between June 2002 and May 2003. During this study, a total of 67 bream were examined for the presence of metazoan parasites. Ten species of parasites were found on 64 of the 67 fish examined. These parasites are: Dactylogyrus sphyrna (Linstow, 1878) and D. distinguendus (Nybelin, 1936) Monogenoidea, Caryophyllaeus laticeps (Pallas, 1781) Cestoidea, Tetracotyle sp, Diplostomum sp. and Tylodelphys clavata (Nordmann, 1832) metacercaria Trematoda, Eustrongylides excisus (Jagerskiöld, 1909) Nematoda, Piscicola geometra (Linnaeus, 1758) Hirudinea, glochidia of mollusk, Bivalvia, Argulus foliaceus (L., 1758) Crustacea. Diplostomum sp., Dactylogyrus sphyrna and D. distinguendus were found to be the dominant parasites of A. brama. Both the prevalence and intensity of other parasites were not found to be high. All identified parasites are a new finding for A. brama in the Lake Durusu. This is the first time that D. distinguendus has been identified in Turkey.

Twenty-seven tree frogs (Hyla arborea ) were collected from 3 different regions of Turkey from 1995-2000 in order to detect helminths . As a result of our survey, 1 Monogenea species and 2 Nematoda species were found. These are Polystoma skrjabini, Cosmocerca ornata and Oswaldocruzia filiformis. This is the second time Polystoma skrjabini has been recorded for this host, while this is the first time Cosmocerca ornata and Oswaldocruzia filiformis have been recorded for this host.