Blood protozoans in elasmobranchs of the family Rajidae from Galicia (NW Spain)

Aragort, W.; Álvarez, M. F.; Leiro, J.; Sanmartín, M. L.

doi:10.3354/dao065063

Cited by 11 publications

(14 citation statements)

References 9 publications

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“…Secondly, its gamont stages are much larger than those of H. delagei (~11 by 2 μm, see Aragort et al . ) and they are very different in morphology, being unlike any haemogregarine known from marine rays.…”

Section: Discussionmentioning

confidence: 95%

“…There are a few named haemogregarines from marine rays: Haemogregarina delagei (Laveran and Mesnil) from various elasmobranchs, including various species of Raja (Linnaeus); Desseria dasyatis (Saunders) Siddall from Dasyatis Americana (Hildebrand & Schroeder); and Desseria torpedinis (Neumann) Siddall from species of Torpedo (Houttuyn) (Aragort et al . ; Davies, Hossein & Merrett ). However, there is only one former report of a haemogregarine in a freshwater ray (Oliveira et al .…”

Section: Discussionmentioning

confidence: 99%

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First report and description of a Cyrilia sp. (Apicomplexa: Haemogregarinidae) from a freshwater Cururu Stingray Potamotrygon cf. histrix (Elasmobranchii: Potamotrygonidae), from the Amazon Region, Brazil

Magro

Oliveira

O’Dwyer

2015

Journal of Fish Diseases

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A haemogregarine is described in 12 cururu stingray (Potamotrygon cf. histrix), from Mariuá Archipelago, Negro River, in the Brazilian Amazon Basin. All animals, both male and female, were parasitized by the haemogregarine and parasitaemia varied between 0.8% and 10% of erythrocytes. The stages observed included trophozoites or merozoites, suspected meronts, and gamonts presumed to be of two types, macrogamonts and microgamonts. Most stages were observed inside mature erythrocytes, while others were extracellular. The stages observed were most similar to those characteristics of the genus Cyrilia, than to any other fish haemogregarine and may represent a new Cyrilia species.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

First report and description of a Cyrilia sp. (Apicomplexa: Haemogregarinidae) from a freshwater Cururu Stingray Potamotrygon cf. histrix (Elasmobranchii: Potamotrygonidae), from the Amazon Region, Brazil

Magro

Oliveira

O’Dwyer

2015

Journal of Fish Diseases

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“…Parasites can potentially act as useful biological markers to better understand stock structure, and although appropriate data are lacking for most areas of abundance, the parasite fauna of R. undulata captured in Iberian coastal waters are relatively well documented (Kearn & Beverley‐Burton, 1990; Sanmartín et al , 2000; Aragort et al , 2005; Álvarez et al , 2006). These studies have reported the presence of various monogeneans ( Mycteronastes undulatae and Rajonchocotyle emarginata ), cestodes ( Acanthobothrium benedeni , Acanthobothrium sp., Crossobothrium sp., Echeneibothrium beauchampi , Echeneibothrium sp., Grillotia sp., Onchobothrium uncinatum and Phyllobothrium lactuca ), nematode worms [ Proleptus sp., Schulmanela ( Piscicapillaria ) sp., Pseudanisakis rotundata and Cystidicolidae] and the acanthocephalan Acanthocephaloides propinquus .…”

Section: Life Historymentioning

confidence: 99%

An overview of the biology and status of undulate ray Raja undulata in the north‐east Atlantic Ocean

Ellis

McCully

Brown

2012

Journal of Fish Biology

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The undulate ray Raja undulata is one of the lesser-known skates occurring on the continental shelf of the north-east Atlantic Ocean. It is patchily distributed throughout its range, with sites of local abundance in the central English Channel and off the coasts of Ireland, France, Spain and Portugal. Raja undulata is most abundant in coastal waters (<50 m deep) and is often found in proximity to large estuaries, rias and bays. It is a relatively large-bodied species, attaining a maximum total length (L(T) ) of at least 114 cm, with females maturing at an L(T) of c. 84 cm in Portuguese waters. Although infrequently taken in existing trawl surveys, it can be locally abundant in certain areas, where it can be the dominant skate species. Given its large size, patchy distribution and concern over the possibilities of localized depletions, the IUCN listed R. undulata as an endangered species and, since 2009, the European Union has established regulations to prohibit commercial fisheries landing the species. Given the increased interest in the species, a synopsis of current knowledge is provided, and available data from internationally co-ordinated trawl surveys presented.

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“…was 20.3%. Aragort et al (2005) studying species of marine stingrays Raja microocellata, Raja brachyuran and Raja spp., observed that average 14.3% of the animals were parasitized by Haemogregarina delagei. Moreover, in spiny dogfish Squalus acanthias the average prevalence of hemogregarinidae was 56.0%, ranging from 22.8% to 75.0% depending on the time that the animals are kept in acclimation (Clewley et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Parasites are abundant in tropical climates, and are one of the major causes of death and disposal of fish (Tavares-Dias et al, 2001), including elasmobranchs (Clewley et al, 2002;Aragort et al, 2005), highlighting the intraerythrocytic parasites (Davies and Smit, 2001;Hayes et al, 2006;Smit et al, 2006). Recently described in a freshwater stingray (Magro et al, 2015), these parasites can take advantage of temperature fluctuations, reproduction strategies, population genetic patterns, as well as habitat and migratory behavior to reproduce and proliferate in the blood of a diversity of hosts (Davies and Johnston, 2000).…”

Section: Introductionmentioning

confidence: 99%

Cyrilia sp. (Apicomplexa: Haemogregarinidae) in the Amazonian freshwater stingray Potamotrygon wallacei (cururu stingray) in different hydrological phases of the Rio Negro

et al. 2016

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Intraerythrocytic parasites are frequently found in fish, including elasmobranchs. The Amazonian rivers present well defined annual hydrological cycles that results in drastic modifications of the environmental conditions with deep implications in the life cycle of the whole associated biota in those fluvial systems. The freshwater stingray Potamotrygon wallacei (stingray cururu) is a new species restricted to the Middle Rio Negro basin and it is subject to strong alterations in their natural habitats (igapós) a result of the constant variations in the water level of Rio Negro. This work demonstrates the occurrence of intraerythrocytic parasite Cyrilia sp. in this stingray species. Additionally, the prevalence and quantification of hemoparasites in different phases of Rio Negro were also established. Field sampling was carried in the Archipelago of Mariuá, Middle Rio Negro, involving different stages of the water cycle. The intraerythrocytic parasites were quantified by direct counting in blood smears using a total counting of 2000 erythrocytes in each blood smear. The presence of parasites intraerythrocytic generates changes in the morphology of blood cell. The largest amount of the hemoparasites was recorded in the drought period. We observed a decreasing tendency in the number of parasites in the blood between the drought periods and inundation. We concluded that the level of Negro River influences the incidence of intraerythrocytic parasites in the cururu stingray and the drought represents the period of larger susceptibility to the infestation.Keywords: Amazon basin, prevalence, intraerythrocytic, seasonal variation, freshwater stingray.Cyrilia sp. (Apicomplexa: Haemogregarinidae) na arraia de água doce Amazônica Potamotrygon wallacei (arraia cururu) em diferentes fases do ciclo hidrológico do Rio Negro ResumoParasitas intraeritrocitários são frequentemente encontrados em peixes, incluindo elasmobrânquios. Os rios Amazônicos possuem ciclos hidrológicos anuais que resultam em modificações drásticas nas condições ambientais, com implicação profunda no ciclo de vida associada a biota dos sistemas fluviais. A arraia de água doce Potamotrygon wallacei (arraia cururu) é uma nova espécie restrita a bacia do médio Rio Negro e sujeita a fortes alterações em seus habitats naturais (igapós) resultantes das constantes variações do nível de água do Rio Negro. Este trabalho demonstra a ocorrência de parasita intraeritrocitário Cyrilia sp. em espécimes de arraias de água doce. Além disso, a prevalência e quantificaçãoBraz.

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Blood protozoans in elasmobranchs of the family Rajidae from Galicia (NW Spain)

Cited by 11 publications

References 9 publications

First report and description of a Cyrilia sp. (Apicomplexa: Haemogregarinidae) from a freshwater Cururu Stingray Potamotrygon cf. histrix (Elasmobranchii: Potamotrygonidae), from the Amazon Region, Brazil

First report and description of a Cyrilia sp. (Apicomplexa: Haemogregarinidae) from a freshwater Cururu Stingray Potamotrygon cf. histrix (Elasmobranchii: Potamotrygonidae), from the Amazon Region, Brazil

An overview of the biology and status of undulate ray Raja undulata in the north‐east Atlantic Ocean

Cyrilia sp. (Apicomplexa: Haemogregarinidae) in the Amazonian freshwater stingray Potamotrygon wallacei (cururu stingray) in different hydrological phases of the Rio Negro

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