The trouble with sealworms (<i>Pseudoterranova decipiens</i> species complex, Nematoda): a review

McClelland, G. A. H.

doi:10.1017/s0031182002001658

Cited by 124 publications

(132 citation statements)

References 0 publications

Supporting

Mentioning

125

Contrasting

Unclassified

Order By: Relevance

“…Regarding parasite prevalence there was a tendency of regional variation, in that Atlantic cod appeared to become more quickly infected in the Sisimiut area than in the Godthaab area. Similar geographical variation has been observed off Canada, and may in part reflect the distribution of the phocid and cetacean definitive hosts (McClelland et al 1983, Brattey and Bishop 1992, Boily and Marcogliese 1995, McClelland 2002. However, it is difficult to quantify this difference and it is at present impossible to evaluate if the distribution of definitive hosts, which determines nematode composition in this area, influences parasite accumulation in the species studied here.…”

Section: Nematode Prevalence and Intensitysupporting

confidence: 63%

“…Furthermore, their presence in muscle tissue of cod is of economic importance due to the hygienic problems they cause in the fishing industry (McClelland 2002). Also, parasites are usually able to regulate their host population (Begon et al 1996, Mouritsen and Poulin 2002, Møller 2005) and where these parasitic nematodes occur abundantly they might well affect the cod population negatively.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Occurrence of anisakid nematodes in Atlantic cod (Gadus morhua) and Greenland cod (Gadus ogac), West Greenland

Mouritsen

Hedeholm

Schack

et al. 2010

Acta Parasitologica

View full text Add to dashboard Cite

Anisakid nematodes commonly infect gadids, and are of economic and aesthetic importance to the commercial fishing industry in Greenland as some species are pathogenic to humans. However, very little is known about the occurrence of these parasites and their impact on the hosts in Greenland waters. During a survey in 2005, stomach sample of 227 Atlantic cod (Gadus morhua) and 64 Greenland cod (Gadus ogac) was collected in Godthaab and Sisimiut fiord systems in West Greenland waters. All cod were dissected for stomach contents and anisakid nematodes were removed from the visceral cavity. Third stage larvae (L3) of three anisakid species were found, including Contracaecum osculatum (Rudolphi, 1802), Anisakis simplex (Rudolphi, 1809) and Hysterothylacium aduncum (Rudolphi, 1802). Molecular identification by PCR-RFLP indicated the presence of A. simplex s.s. and the sibling species C. osculatum B and C. The prevalence of infection by C. osculatum was higher in Greenland cod (84.3%) than in Atlantic cod (73.9%) whereas the prevalence of A. simplex showed an opposite pattern (Greenland cod 8.3%; Atlantic cod 24.2%). Only one G. morhua (1.0%) was infected by H. aduncum. No gender specific difference in both nematode species regarding prevalence of infection and mean infection intensity was evident, and there was no relationship between fish condition and the intensity of nematode infections. Standardised for size, capelin-eating cod were in better condition and more heavily infected than fish subsisting on alternative prey at the point of collection. Hence, nematode infections in the two gadids seem governed in part by feeding behaviour, and capelin appears a significant source of larval anisakids.

show abstract

Section: Nematode Prevalence and Intensitysupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Occurrence of anisakid nematodes in Atlantic cod (Gadus morhua) and Greenland cod (Gadus ogac), West Greenland

Mouritsen

Hedeholm

Schack

et al. 2010

Acta Parasitologica

View full text Add to dashboard Cite

show abstract

“…Buchmann and Kania (2012) indicated that prevalence and intensity of P. decipiens in Baltic cod has increased over the last 30 yr. The zoonotic potential of P. decipiens is potentially higher than C. osculatum because larvae of the former species almost exclusively are found in the fish musculature (Mcclelland 2002;Skirnisson 2006). We detected only one cod worm in the investigated .…”

Section: Discussionmentioning

confidence: 99%

INCREASEDCONTRACAECUM OSCULATUMINFECTION IN BALTIC COD (GADUS MORHUA) LIVERS (1982–2012) ASSOCIATED WITH INCREASING GREY SEAL (HALICHOERUS GRYPHUS) POPULATIONS

Haarder

Kania

Galatius

et al. 2014

Journal of Wildlife Diseases

View full text Add to dashboard Cite

ABSTRACT:Grey seals (Halichoerus gryphus), the main final host of the gastric parasitic nematode Contracaecum osculatum in the Baltic, have recently recolonized the southwestern Baltic Sea. This colonization could lead to an increase in prevalence and intensity of third-stage larvae of C. osculatum in livers of Baltic cod (Gadus morhua), which serve as transport host for this helminth. We performed a parasitologic study of cod in spring 2012 and compared the results with previously unpublished data from 1982/1983. Additionally, grey seals were counted annually from 2000 to 2011 at three haul-out sites in the southwestern Baltic. Of 97 cod livers examined in the 1982/1983 survey, 22% harbored C. osculatum larvae, whereas 55.1% of the examined cod livers (n5185) were infected in 2012; the mean intensity and mean abundance increased from 4.3 and 0.9 to 20.2 and 11.1, respectively. Molecular identification (PCR) confirmed the identity of the larvae. The grey seal population increased markedly during the 12-yr period. We suggest that the elevated parasitism of cod livers is associated with the successful re-establishment of grey seals in the southwestern Baltic.

show abstract

“…Las larvas de anisákidos en los peces comercializados también tiene un impacto económico sobre la industria por la pérdida que ocasiona su detección y extracción de los músculos del bacalao (Gadus morhua) y otros peces demersales como ha sido demostrado en la costa atlántica de Canadá, calculándose una pérdida de 27 a 50 M de dólares anualmente (McClelland 2002).…”

Section: Parásitosunclassified

Helmintos, myxozoos y microsporidios en músculos de peces comercializados frescos y su importancia como riesgo potencial para la salud humana en la ciudad de Valdivia, Chile

et al. 2014

View full text Add to dashboard Cite

Arch Med Vet 46, 83-92 (2014) 83Helmintos, myxozoos y microsporidios en músculos de peces comercializados frescos y su importancia como riesgo potencial para la salud humana en la ciudad de Valdivia, Chile # Helminths, myxozoans and microsporidians in muscles of commercialised fresh fish and their importance as potential risk for human health in the city of Valdivia, Chile SUMMARYThe prevalence, mean intensity, mean abundance, and mean density of infection by helminths, myxozoans, and microsporidians were determined in the muscles of southern hake, Merluccius australis (n = 104), pink cusk-eel, Genypterus blacodes (n =81), and snoek, Thyrsites atun (n = 95), all of them sold fresh in the city of Valdivia, Chile. Fish were examined on a candling table, with direct observation of the dorsal and ventral muscles (candling 1), in cuts 4 mm thick or less (candling 2), and on a glass plate compression. Prevalence, mean intensity, and mean abundance of infection, by all the identified parasites in each host, were significantly higher (P < 0.05) in hake and pink cusk-eel, compared with the snoek. Mean density of infection in the hake was higher (P < 0.05) than in pink cusk-eel; the latter had a higher (P < 0.05) density of infection than the snoek. All fish hosts showed parasites with potential risks to human health, such as Anisakis sp. types I and II or Pseudoterranova sp. Other parasites were also detected in each fish host: metacercariae of trematodes, Hepatoxylon trichiuri, Pseudoterranova sp., Anisakis sp. type I, Kudoa sp., and microsporidians in the hake; metacercariae of trematodes, Pseudoterranova sp., Anisakis sp. types I and type II, Corynosoma sp., Kudoa sp., and microsporidians in pink cusk-eel; and Molicola sp., Pseudoterranova sp., and Anisakis sp. type I in the snoek. Pseudoterranova sp. and Molicola sp. had the highest prevalence, mean intensity, mean abundance, and mean density of infection in the pink cush-eel and the snoek, respectively. In the hake, the highest prevalence, mean abundance and mean density were determined for Kudoa sp; mean intensity of infection was highest for microsporidiosis.Key words: parasites, zoonoses, fish muscles, food. RESUMENLa prevalencia e intensidad, abundancia y densidad media de infección por helmintos, myxozoos y microsporidios fue determinada en músculos de merluza austral, Merluccius australis (n= 104), congrio dorado, Genypterus blacodes (n = 81) y sierra, Thyrsites atun (n = 95), comercializados frescos en la ciudad de Valdivia, Chile. El análisis fue realizado en mesa de candling, observando directamente la musculatura dorsal y ventral (candling 1), en cortes de 4 mm o menos de espesor (candling 2) y por compresión en placas. La prevalencia, intensidad media y abundancia media de infección, por el total de parásitos determinados en cada huésped, resultaron significativamente mayores (P < 0,05) en la merluza y el congrio, respecto a la sierra. La densidad media fue significativamente mayor (P < 0,05) en la merluza respecto al congrio y en este último resultó may...

show abstract

The trouble with sealworms (Pseudoterranova decipiens species complex, Nematoda): a review

Cited by 124 publications

References 0 publications

Occurrence of anisakid nematodes in Atlantic cod (Gadus morhua) and Greenland cod (Gadus ogac), West Greenland

Occurrence of anisakid nematodes in Atlantic cod (Gadus morhua) and Greenland cod (Gadus ogac), West Greenland

INCREASEDCONTRACAECUM OSCULATUMINFECTION IN BALTIC COD (GADUS MORHUA) LIVERS (1982–2012) ASSOCIATED WITH INCREASING GREY SEAL (HALICHOERUS GRYPHUS) POPULATIONS

Helmintos, myxozoos y microsporidios en músculos de peces comercializados frescos y su importancia como riesgo potencial para la salud humana en la ciudad de Valdivia, Chile

Contact Info

Product

Resources

About