Digenean trematodes of Seriolella porosa [Pisces, Centrolophidae] in San Matias Gulf, Argentina

• Autorzy: Guagliardo S E , Schwerdt C.B. , Martorelli S.R. , Galeano N.A. , Tanzola R.D.
• Języki publikacji: EN

Abstrakty

EN

Seriolella porosa (Silver warehou) is an important fish resource in the Argentine Sea. No previous studies have been carried out to date on its parasite fauna. The present study aims to (i) identify the digenean trematodes that parasitize Silver warehou, (ii) estimate parasite frequency and abundance, and (iii) establish their relationship with fish size and sex. A total of 100 specimens of S. porosa from San Matías Gulf, Argentina were examined between September and October 2006. Host size and sex were determined. Parasites extracted from the stomach lumen were fixed, conserved in 5% formalin, and stained with Langeron’s hydrochloric carmine. The following parameters were also determined: dispersion coefficient, prevalence, intensity, and parasite abundance. Differences in parasitism were assessed using non-parametric tests. Four adult digenean species were found in the stomach, namely Lecithocladium cristatum, Aponurus laguncula, Elytrophalloides oatesi and Gonocerca cf. phycidis. L. cristatum was not only dominant but also the most prevalent and abundant species. None of the digeneans showed interspecific association with each other and therefore they might follow different patterns of colonization (i.e., different intermediate hosts, seasonal and/or spatial distribution of the infective stages). Significant differences were observed among the digeneans analyzed in respect to the sex of the host. Results from this study show that Silver warehou plays a key role as a final host of a significant number of digeneans in the ecosystem. This study is the first step in an attempt to further determine the larval stages in intermediate hosts in San Matías Gulf.

Słowa kluczowe

EN

digenean trematode; Seriolella porosa; Silver warehou; fish; Pisces; Centrolophidae; parasite fauna; stomach lumen; parasitism; San Matias Gulf; Argentina

• Wydawca: -
• Czasopismo: Acta Parasitologica
• Rocznik: 2010
• Tom: 55
• Numer: 1
• Opis fizyczny: p.29-38,fig.,ref.

Twórcy

autor

Guagliardo S E

• Universidad Nacional del Sur, San Juan 670 [8000] Bahia Blanca, Argentina

autor

Schwerdt C.B.

autor

Martorelli S.R.

autor

Galeano N.A.

autor

Tanzola R.D.

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