Seasonal occurrence and site selection of Lamproglena pulchella Von Nordmann, 1832 (Copepoda, Lernaeidae) on the gills of rudd, Scardinius erythrophthalmus (Pisces, Cyprınidae)

Abstract

The crustacean ectoparasite, Lamproglena pulchella Von Nordmann, 1832 (Copepoda, Lernaeidae) is found attached to the gill filaments of rudd, Scardinius erythrophthalmus (Linnaeus, 1758). During the present study, performed between March 2009 and February 2010 at monthly intervals at Lake Sapanca, Turkey, a total of 128 specimens of S. eryththrophthalmus were examined. Of these, 88 (68.8%) were infected by L. pulchella, which totalled 251 in number, with a mean intensity [mean number of parasites per infected fish] of 2.85 and a mean abundance [mean number of parasites calculated over all fish sampled] of 1.96 individuals. There was no distinct seasonality in the occurrence of L. pulchella throughout the study period. The maximum mean abundance of the infection was recorded as 2.84 individuals in July. The prevalence of L. pulchella increased with fish body size. The maximum intensity of the infection was 12 specimens of L. pulchella in July on a single fish. The branchial distribution of L. pulchella was studied and no preference was found in the distribution of the parasite between the gill arches on the left and right side. Gill arches II and III, medial segments, posterior hemibranches, and inner surface of the hemibranches were preferred by L. pulchella. RÉSUMÉLe crustacé ectoparasite, Lamproglena pulchella Von Nordmann, 1832 (Copepoda, Lernaediae) a été trouvé fixé aux filaments branchiaux du rotengle, Scardinus erythrophthalmus (Linneaus, 1758). Au cours de cette étude, réalisée mensullement entre mars 2009 et février 2010, dans le lac Sapanca, en Turqiue, un total de 128 spécimens de S. erythrophthalmus ont été examinés. Parmi ceux-ci, 88 (68,8%) étaient infectés par L. pulchella, soit un total de 251, avec une intensité moyenne [nombre moyen de parasites par poisson infecté] de 2,85 et une abundance moyenne [nombre moyen de parasites calculé sur l'ensemble des poissons échantillonnés] de 1,96 individus. Il n'a pas été observé de caractère saisonnier dans la presence de L. pulchella tout au long de la période d'etude. L'abondance moyenne maximale de l'infection était de 2,84 individus en juillet. La prévalence de 1 )

Türkiyede bazı balıklarda Myxobolus cyprini ve Lamproglena pulchella türlerinin morfolojik identifikasyonu ve patolojisi

“…In this study, L. pulchella were determined as embedded in the gills of fish. This parasite on the gills of fish was previously recorded with a prevalence of 28.24% on C. regium and 28.50% on C. trutta (Saglam 1998), 20%-60% on C. nasus (Jirsa et al 2006), 100% on both C. carpio and C. trutta (Oktener et al 2008), 38.4%-88.8% on S. erythrophthalmus as seasonal (Soylu 2012), and 11.2% on S. fellowesii (Unal et al 2017). It was less than half of the prevalence data of Oktener et al (2008) and (Soylu 2012), while it was slightly higher data of Saglam (1998) and Unal et al (2017).…”

“…Although L. pulchella was determined on chub (Squalius cephalus) in many studies (Cakic et al 1998;Galli et al 2001a;Galli et al 2001b;Jirsa et al 2006) asp (Aspius aspius) and European catfish (Silurus glanis) (Molnár et al 2018), it was found on Barbus lacerta in the present study. In all the studies carried out on L. pulchella ( Jirsa et al 2006;Jirsa et al 2011;Galli et al 2001a;Galli et al 2001b;Cakic et al 1998;Kus and Soylu 2013;Saglam 1998;Soylu 2012;Molnár et al 2018) the parasite above was seen to prefer the gills of the fish and was not determined in another region. L. pulchella has been previously reported from Turkey in gills of Capoeta trutta and Chondrostoma regium in Keban Dam Lake (Saglam 1998); Cyprinus carpio and Capoeta trutta (Oktener et al 2008) in Balıklıgöl; Scardinius erythrophthalmus in Sapanca Lake (Soylu 2012;Kus and Soylu 2013); Squalius fellowesii in the Doğanbaba Creek (Burdur) (Unal et al 2017).…”

“…In all the studies carried out on L. pulchella ( Jirsa et al 2006;Jirsa et al 2011;Galli et al 2001a;Galli et al 2001b;Cakic et al 1998;Kus and Soylu 2013;Saglam 1998;Soylu 2012;Molnár et al 2018) the parasite above was seen to prefer the gills of the fish and was not determined in another region. L. pulchella has been previously reported from Turkey in gills of Capoeta trutta and Chondrostoma regium in Keban Dam Lake (Saglam 1998); Cyprinus carpio and Capoeta trutta (Oktener et al 2008) in Balıklıgöl; Scardinius erythrophthalmus in Sapanca Lake (Soylu 2012;Kus and Soylu 2013); Squalius fellowesii in the Doğanbaba Creek (Burdur) (Unal et al 2017). As in the other studies, in this study, L. pulchella was found hanging on to the gill lamellae of the fish.…”

“…L. pulchella was detected in the C. nasus (Jirsa et al 2011;Jirsa et al 2006) and L. cephalus (Jirsa et al 2006) fish species caught in rivers in Austria. The parasite mentioned above was also determined in the gills of L. cephalus in Serbia (Cakic et al 1998) and Scardinius erythrophthalmus in Turkey (Kus and Soylu 2013;Soylu 2012).…”