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Temporal variation in prevalence and cercarial development of Echinostephilla patellae [Digenea, Philophthalmidae] in the intertidal gastropod Patella vulgata

100%

Prinz K., Kelly T. C., O'Riordan R. M., Culloty S. C.

Acta Parasitologica

2010

tom 55

nr 1

39-44

The trematode Echinostephilla patellae is an abundant but scarcely investigated parasite found in coastal ecosystems of the British Isles. Redial and cercarial stages of the digenean occur in the digestive gland and gonads of common limpets Patella vulgata. Here, we present data on the temporal distribution of E. patellae infections in P. vulgata from an intertidal site on the Irish south coast as well as on the intramolluscan development of the cercariae over a period of one year. Prevalence of infection showed temporal variation with a distinct peak in September, possibly related to an increase in the abundance of bird final hosts coinciding with comparatively high temperatures at the study locality during the summer months. Maturation of cercarial stages was strongly correlated with water temperature. Whilst fully developed cercariae were present in the rediae from May to November, large numbers of infective stages occurred in the limpets’ mantle blood vessels — where they accumulate prior to release — between June and September, suggesting this period of time to be the main transmission window for E. patellae cercariae.

A survey of larval digeneans in the commonest intertidal snails from Northern Patagonian coast, Argentina

100%

Gilardoni C., Etchegoin J., Diaz J. I., Ituarte C., Cremonte F.

Acta Parasitologica

2011

tom 56

nr 2

Over a two-years period, a survey was carried out in order to increase the knowledge of digeneans parasitising the commonest intertidal gastropods on the Patagonian coast, Southwestern Atlantic Ocean. A total of 4,725 gastropods were examined. Six species of digenean parasitising four snail species were found; four of them were registered for first time: Maritrema sp. 1 (Microphallidae) in Crepidula dilatata (Calyptraeidae), Parorchis sp. (Philophtalmidae) and sporocyst of Renicolidae in Trophon geversianus (Muricidae), and Diphterostomum sp. (Zoogonidae) in Buccinanops globulosus (Nassariidae). Two other species were found in Siphonaria lessoni (Siphonariidae): Maritrema sp. 2 and Hemiuridae. One snail species, Tegula patagonica (Trochidae) was not parasitised. These gastropods act as first intermediate host, and C. dilatata, S. lessoni and B. globulosus also frequently host metacercariae within the sporocyst. Overall prevalences varied from 0.16% of Diphterostomum in the intertidal population of B. globulosus to 33.45% of Maritrema sp. 1 in C. dilatata.

Ograniczanie wyników

2 Acta Parasitologica

1 Cremonte F.

1 Culloty S. C.

1 Diaz J. I.

1 Etchegoin J.

1 Gilardoni C.

1 Ituarte C.

1 Kelly T. C.

1 O'Riordan R. M.

1 Prinz K.

1 2011

1 2010

Wyniki wyszukiwania

Temporal variation in prevalence and cercarial development of Echinostephilla patellae [Digenea, Philophthalmidae] in the intertidal gastropod Patella vulgata

A survey of larval digeneans in the commonest intertidal snails from Northern Patagonian coast, Argentina