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1

Effect of an adult trematode, Proctoeces lintoni [Fellodistomidae], on the gonadosomatic index of Fissurella limbata [Archaeogastropoda]

100%
Oliva M. E.
Acta Parasitologica
|
1993
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tom 38
|
nr 4
The influence on the gonadosomatic index of the adult Proctoeces lintoni (Digenea), a parasite of the gonads of the key-hole limpet Fissurella limbata (Gastropoda), was analyzed. Parasitic biomass reached as much 34.9% of gonadic weight, with a maximum of 99.4%. The gonadosomatic index computed as: (gonadic weight x total length ⁻¹) x 100, shows significant differences when compared with a corrected gonadosomatic index that excludes the parasitic biomass. Thus, caution must be taken when the gonadosomatic index is considered as a valid parameter in parasitized gonads.
2

An ecological approach to the study of infection of Proctoeces lintoni [Digenea, Fellodistomidae] in the key hole limpet, Fissurella limbata Sowerby, 1835 [Archaeogastropoda] from northern Chile

100%
Oliva M. E., Diaz M. A.
Acta Parasitologica
|
1992
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tom 37
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nr 3
Parasitological analysis of 554 specimens of Fissurella limbata Sowerby, 1835 (Mollusca, Archaeogastropoda) showed that as many as 97% of the molluscs were infected in the gonads by progenetic adults of the digenetic trematode Proctoeces lintoni Siddiqi et Cable, 1960. Prevalence and intensity of infection were not affected by the host’s sex, but were significantly and positively correlated with host length. Season seemed to affect neither, intensity nor prevalence of infection. Mean intensity reached 16.4, maximum intensity observed was 90 worms. The impact of microhabitat in a rocky beach is discussed as a possible factor that may help to explain the strong differences found in prevalence and intensity of infection caused by Proctoeces lintoni in Fissurella spp. from Chile.
3

Spatio-temporal variation in the prevalence of trematodes in the bivalve Perumytilus purpuratus

84%
Munoz G., Torres P., Valdes J., Rodriguez A.
Acta Parasitologica
|
2013
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tom 58
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nr 2
Perumytilus purpuratus is an abundant bivalve located in the intertidal rocky zone of South America that has been considered as a key species of the ecosystem. There are few studies of the host-parasite relationship of this bivalve; thus, this research aims to analyse the spatial and temporal variation in the prevalence of trematodes in P. purpuratus. Bivalves were collected from three localities (El Tabo, Las Cruces and Montemar) of central Chile (33°S, 71°W) during different seasons of 2010. The bivalves were also collected every metre, from the lowest to the highest level of the intertidal rocky zone, to determine the parasite distribution within the localities. Three species of trematodes as sporocyst stages were found: Prosorhynchoides carvajali, Proctoeces sp. and an undetermined fellodistomid species. Of the 37,692 bivalve specimens collected, 2.68% were parasitised. The undetermined fellodistomid species was the most prevalent parasite observed (1.69%). There were little detected differences in the prevalence of some trematode species between seasons. The prevalence of P. carvajali varied between localities, being most prevalent at Montemar. The distribution of trematodes along the rocky zone within the localities was variable, with P. carvajali being more prevalent in the mid-lowest level of the intertidal zone and the undetermined fellodistomid species being more prevalent in the mid-highest level. Both the abundance of definitive hosts and the environmental conditions likely result in different levels of infection by trematodes in P. purpuratus between and within the localities.
4

Digenea of fishes of the Weddell Sea. V. Two new species of the genus Steringophorus [Fellodistomidae]

67%
Zdzitowiecki K.
Acta Parasitologica
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1997
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tom 42
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nr 3
Steringophorus arntzi sp. n. is described from notothenioid fishes, Bathydraco marri (type-host, Bathydraconidae) and Dolloidraco longedorsalis (Artedidraconidae). This species resembles S. furciger (Olsson, 1868), but it is distinguished from that by eggs with a short filament, entire ovary (only with irregular margins), less elongate body and a post-bifurcal genital pore. Its area of distribution, the Antarctic, is distant from that of S. furciger (in the north hemisphere). Steringophorus liparidis sp. n. is described from Paraliparis antarcticus (Liparididae). This species resembles S. thulini Bray et Gibson, 1980, but it is distinguished by eggs with a spine on the anopercular pole, longer intestinal caeca, vitelline fields situated more anteriorly in relation to the ventral sucker, different hosts (liparidids contrary to gadiforms) and area of distribution (the Antarctic contrary to the north Atlantic). Occurrence of fellodistomid digeneans in the Antarctic subcontinental waters is recorded for the first time.
5

Further observations on the Digenea [Platyhelminthes] of deep-sea fishes in the northeastern Atlantic: Fellodistomidae and Zoogonidae

67%
Bray R. A., Gibson D. I.
Acta Parasitologica
|
1998
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tom 43
|
nr 4
The following parasites are described from deep-sea fishes of the northeastern Atlantic Ocean. Fellodistomidae: Steringophorus haedrichi from Spectrunculus grandis, Porcupine Seabight; Olssonium turneri from Alepocephalus agassizi, Rockall Trough and Porcupine Seabight; Hypertrema ambovatum from Synaphobranchus kaupi, Rockall Trough and Porcupine Seabight and Histiobranchus bathybius, Porcupine Seabight; and Zoogonidae: Brachyenteron rissoanum from Polyacanthonotus challengeri, Porcupine Seabight. These are the first reports of S. haedrichi, H. ambovatum and B. rissoanum from the northeastern Atlantic Ocean.
6

Diversity of the digenean fauna in sparid fishes from the Lagoon of Bizerte in Tunisia

59%
Ben Abdallah L. G., Antar R., Maamouri F.
Acta Parasitologica
|
2011
|
tom 56
|
nr 1
A total of 24 digenean species belonging to 10 distinct families (Derogenidae, Faustulidae, Fellodistomidae, Gyliauchenidae, Hemiuridae, Lepocreadiidae, Mesometridae, Monorchiidae, Opecoelidae and Zoogonidae) were recorded in sparid fishes from Bizerte Lagoon (northern Tunisia). The diversity of the digenean fauna of sparid fishes from this locality is compared to that recorded from the Gulf of Tunis. Prodistomum polonii, not detected before, was found in Sarpa salpa. Aphallus rubalo, Derogenes latus, Holorchis micracanthum and Pachycreadium carnosum previously recorded from sparid fishes on the Tunisian coasts were absent during this study. Allopodocotyle pedicellata, Lepocreadium pegorchis, L. album, Proctoeces maculatus, Magnibursatus bartolii and Macvicaria maillardi were reported in hosts not previously reported for the Gulf of Tunis. Generally, prevalence was higher in fishes from Bizerte Lagoon but abundance and mean intensity were higher in Gulf of Tunis. Except for Lithognathus mormyrus, Sarpa salpa and Sparus aurata from Bizerte Lagoon, which show higher digenean diversity, the other sparid fishes have a lower diversity compared to those from Gulf of Tunis. The species richness of digeneans in B. boops was the same in the two areas studied.
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