First Gnathia sp. (Gnathiidae) Infestation on Labrus viridis (Labridae) in Türkiye

Year 2024, Volume: 20 Issue: 1, 62 - 70, 01.03.2024

Kaan Kumaş , Ezgi Dinçtürk , Tevfik Tansel Tanrıkul

https://doi.org/10.22392/actaquatr.1300648

Abstract

Gnathiids are ectoparasites of elasmobranchs and teleosts. The adult stage of gnathiids is free-living but has a blood-sucking parasitic form called praniza larvae. Gnathiid praniza infestations have been previously reported in numerous species of fish. In the current study, Labrus viridis collected from İzmir Bay, Aegean Sea, was examined for parasite infestation. Gnathia sp. was found predominantly in the gills and mouth cavity of fish with a 58.3% prevalence. The samples were collected with fine forceps from the host and preserved in 70% ethanol and 10% formaldehyde solution for observation with a light microscope and scanning electron microscopy to identify parasites. Red and green-blue pranizas were detected, and the hindgut of pranizas showed differences depending on attachment location of the host.

Keywords

Aegean Sea, Gnathiid isopods, Labridae, Labrus viridis, Ectoparasites

Türkiye'de Labrus viridis (Labridae)’de İlk Gnathia sp. (Gnathiidae) Enfestasyonu

Abstract

Gnathiidler, elasmobranch ve teleost balıkların ektoparazitleridir. Ergin aşamada olan Gnathiidler serbest yaşar ancak praniza larvaları adı verilen kan emici bir parazit formu bulunmaktadır. Daha önce birçok balık türünde Gnathiid praniza enfestasyonları rapor edilmiştir. Bu çalışmada, Labrus viridis türüne ait balıklar Ege Denizi, İzmir körfezinden örneklenmiş ve parazit enfestasyonu açısından incelenmiştir. Balıkların solungaçlarında ve ağız boşluklarında %58,3 prevelans ile Gnathia sp. tespit edilmiştir. Örnekler ince uçlu pens kullanılarak balıktan toplanarak %70 etanol ile %10 formaldehit solüsyonlarında ışık mikroskobunda ve taramalı elektron mikroskobunda incelenmek üzere saklanmıştır. Kırmızı ve Mavi-yeşil pranizalarda, konakçı üzerinde bulundukları bölgelere göre farklılıklar tespit edilmiştir.

Keywords

Ege denizi, Gnathiid izopodlar, Labridae, Labrus viridis, Ektoparazitler

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