| genetic evidence for three species within pseudoterranova decipiens (nematoda, ascaridida, ascaridoidea) in the north atlantic and norwegian and barents seas. | genetic variation of 1017 specimens of codworm, pseudoterranova decipiens, collected from fish and seals at 23 sampling locations in the north atlantic and norwegian and barents seas, was analysed on the basis of 16 enzyme loci. three reproductively isolated species, provisionally designated p. decipiens a, b and c, were detected, showing distinct alleles at the following loci: mdh-1, 6pgdh, np, pgm, est-2 (between species a and b); mdh-3, 6pgdh, np, sod-1, adk, pgm, est-2, mpi (between a and c) ... | 1991 | 1869354 |
| in vitro effect of ivermectin on pseudoterranova decipiens survival. | third larval stages (l3) removed from fish fillets, fourth larval stages (l4) raised in in vitro culture, and adults of pseudoterranova decipiens, collected from grey seal (halichoerus grypus) stomachs, were exposed to the broad spectrum anthelmintic, ivermectin. l3 and l4 parasites were exposed, in vitro, to 500, 100, 50, 20, 5 and 1 micrograms/ml concentrations of the drug, in culture media. adult p. decipiens were exposed in vitro to a concentration of 500 micrograms/ml ivermectin, only. cont ... | 1989 | 2723387 |
| larval nematodes infecting amphiporeia virginiana (amphipoda: pontoporeioidea) on sable island, nova scotia. | three species of larval nematodes were found infecting the nearshore subtidal amphipod amphiporeia virginiana collected from beaches on sable island, nova scotia. five and 2 sealworms, pseudoterranova decipiens s.l., were found in 2,020 and 2,044 amphipods, respectively, collected in 1991 and 1992, dissected, and examined microscopically. two sealworms, 1 paracuaria adunca and 1 ascarophis sp., were found in 5,157 amphipods collected in 1992 and enzymatically digested. infection with each specie ... | 1993 | 8277392 |
| fecundity of sealworm (pseudoterranova decipiens) infecting grey seals (halichoerus grypus) in the gulf of st. lawrence, canada: lack of density-dependent effects. | uterine egg counts were determined by means of an electronic particle counter in individual female sealworm, pseudoterranova decipiens (nematoda: ascaridoidea: anisakidae) collected from grey seals (halichoerus grypus) from anticosti island, northern gulf of st. lawrence, in august and september 1992. mean number of eggs per female was 54,916.9 (+/- 51,866.4), with a maximum of 300,000. egg counts were strongly correlated with worm length, and less so with host sex and age, sealworm sex ratio, a ... | 1997 | 9421731 |
| contracaecum osculatum and other anisakid nematodes in grey seals and cod in the baltic sea: molecular and ecological links. | populations of grey seals (halichoerus grypus), sprats (sprattus sprattus) and cod (gadus morhua) in the baltic sea are relatively stationary. the present work, applying classical and molecular helminthological techniques, documents that seals and cod also share a common parasite, the anisakid nematode contracaecum osculatum, which uses seals as the final host and fish as transport hosts. sequencing mitochondrial genes (cox1 and cox2) in adult worms from seals and third-stage larvae from livers ... | 2017 | 28124629 |
| occurrence of zoonotic nematodes pseudoterranova decipiens, contracaecum osculatum and anisakis simplex in cod (gadus morhua) from the baltic sea. | baltic cod gadus morhua (a total of total 224 specimens) captured east of the island of bornholm in the southern baltic sea were subjected to a parasitological investigation between march 2013 and april 2014. full artificial digestion of fillets from 188 cod and additional investigation of livers from 36 cod were performed. cod or seal worm pseudoterranova decipiens was recorded in musculature (prevalences up to 55% and intensities up to 56 worms per fish) associated with a negative correlation ... | 2014 | 25224792 |
| anisakids of seals found on the southern coast of baltic sea. | in the present study 5 grey seals (halichoerus grypus), 3 common seals (phoca vitulina) and 1 ringed seal (pusa hispida) bycaught or stranded on the polish baltic sea coast in years 2000-2006 were investigated for the infestation of parasitic anisakid nematodes. 749 of anisakids were found. the most common were: contracaecum osculatum (59.3%) and pseudoterranova decipiens (31.0%). there were also small numbers of anisakis simplex (0.8%). after performing rflp three sibling species were found. c. ... | 2014 | 24570064 |
| host size-dependent anisakid infection in baltic cod gadus morhua associated with differential food preferences. | a significant increase in the infection level of baltic cod gadus morhua with the anisakid nematode larvae contracaecum osculatum and pseudoterranova decipiens has been recorded during recent years due to the expanding local population of grey seals halichoerus grypus, which act as final hosts for these parasites. here, we report from an investigation of 368 cod (total length [tl] 6-49 cm; caught in ices subdivision 25) that the infection level of juvenile cod (tl 6-30 cm) with larvae of c. oscu ... | 2016 | 27304871 |
| sealworm (pseudoterranova decipiens) infection in grey seals (halichoerus grypus), cod (gadus morhua) and shorthorn sculpin (myoxocephalus scorpius) in the baltic sea. | the anisakid nematode pseudoterranova decipiens, known as the sealworm or cod worm, can infect the flesh of several fish species. the parasite causes cosmetic problems for the fish industry and can cause abdominal discomfort if consumed by humans. there are only scattered studies on the abundance or distribution of the sealworm in fish and seals in the baltic sea. to remedy this situation, the extent of sealworm infection was investigated in cod (gadus morhua) and shorthorn sculpin (myoxocephalu ... | 2015 | 25367209 |
| emerging pseudoterranova decipiens (krabbe, 1878) problems in baltic cod, gadus morhua l., associated with grey seal colonization of spawning grounds. | | 2012 | 22817526 |