Chromosomes of <i>Acanthocephalus lucii</i>

Mutafova, T.; Nedeva, I.; Kanev, I.

doi:10.1017/s0022149x00016023

Cited by 6 publications

(11 citation statements)

References 1 publication

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“…Comparing our results with recently published data from the distant population of A. lucii from Bulgaria (Mutafova et al 1997), the most essential difference is an absence of supernumerary chromosomes in the Bulgarian worms. The gross morphology of individual chromosome pairs from the Slovak and Bulgarian acanthocephalans differed slightly and can be interpreted in terms of intraspecific variability.…”

supporting

confidence: 81%

“…Our data represent the first record of B chromosomes in thorny-headed worms. A possible relationship between the occurrence of B chromosomes and a heavy metal accumulation in acanthocephalan tissue from contaminated aquatic environments is briefly discussed.A karyotype of Acanthocephalus lucii (Palaeacanthocephala: Echinorhynchidae), a common parasite of freshwater fishes of the Palearctic region, was previously described by Mutafova et al (1997). A female diploid chromosome set consisted of eight submeta-metacentric (pairs 1, 2) and subtelocentric (pairs 3, 4) chromosomes.…”

mentioning

confidence: 99%

“…A karyotype of Acanthocephalus lucii (Palaeacanthocephala: Echinorhynchidae), a common parasite of freshwater fishes of the Palearctic region, was previously described by Mutafova et al (1997). A female diploid chromosome set consisted of eight submeta-metacentric (pairs 1, 2) and subtelocentric (pairs 3, 4) chromosomes.…”

mentioning

confidence: 99%

“…The morphology of species-specific characters such as number, size, shape and alignment of the proboscis hooks, and egg size conform to previous descriptions (Bauer and Skrjabina 1987). The karyological study followed the method described by Mutafova et al (1997). Karyotype analysis was based on the photographs of 81 well-spread oogonial and embryonic mitotic metaphase plates and 18 spreads of spermatocyte chromosomes in the first and second meiotic metaphases.…”

mentioning

confidence: 99%

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Karyotype of Acanthocephalus lucii : the first record of supernumerary chromosomes in thorny-headed worms

Špakulová

Králová-Hromadová

Dudiňák

et al. 2002

Parasitology Research

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The karyotype of Acanthocephalus lucii(Müller, 1776), a parasite of perch, consists of six autosomal biarmed chromosomes and two subtelocentric sex X chromosomes in females or one X in males. The sex determining mechanism is of the XX-X0 type. Most of the acanthocephalans (85%) exhibit small supernumerary metacentric B chromosomes, the number of which varies from one to five. Our data represent the first record of B chromosomes in thorny-headed worms. A possible relationship between the occurrence of B chromosomes and a heavy metal accumulation in acanthocephalan tissue from contaminated aquatic environments is briefly discussed.

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supporting

confidence: 81%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Karyotype of Acanthocephalus lucii : the first record of supernumerary chromosomes in thorny-headed worms

Špakulová

Králová-Hromadová

Dudiňák

et al. 2002

Parasitology Research

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“…In contrast, a distant population of A. lucii from Bulgaria possessed no supernumerary chromosomes (Mutafova et al, 1997). A parallel study revealed that tissues of B carrier A. lucii specimens contained excess levels of mutagenic elements (cadmium, arsenic and lead) in concentrations 16, 60 and 85 times higher than those in the liver of the host fish (Turčeková et al, 2002).…”

Section: Discussionmentioning

confidence: 98%

Current knowledge on B chromosomes in natural populations of helminth parasites: a review

Špakulová

Casanova

2004

Cytogenet Genome Res

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Helminths, traditionally classified into three phyla Platyhelminthes, Nemathelminthes and Acanthocephala, are a phylogenetically broadly diversified group of invertebrates, characterised by a parasitic life style. Current estimates of the helminth species diversity are at least 23–40,000 platyhelminthes, 10–26,000 nematodes and 1,200 acanthocephalans. Recent information on helminth karyotypes is fragmentary, and basic karyological data are known from approximately 1.1% of known species. Supernumerary chromosomes have been reported in selected populations of only 11 digenean flukes (Platyhelminthes), 1 thorny-headed worm (Acanthocephala) and 4 roundworms (Nematoda), which represent 3.6, 7.7 and 1.3% of the total number of species cytogenetically analysed to date within respective helminth groups. B chromosome presence was not generally associated with heteromorphic sex chromosomes as they occurred both in hermaphroditic flukes and dioecious helminths, and in species having male or female heterogametic sex chromosomes (ZW of schistosomes, XO of acanthocephalans and XY of nematodes). Numbers of B chromosomes varied from 1 to 10. Most often, Bs represented one or two of the smallest elements of the complement but they could be much bigger in some digenean flukes. B chromosomes showed a diverse morphology, including telocentric to metacentric structure. There is no detailed banding or ultrastructural study of Bs in the majority of helminth carriers. Assumptions on the possible relation between the occurrence of Bs in endoparasitic helminths and extreme environments are discussed.

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Chromosome analysis and the occurrence of B chromosomes in fish parasite Acanthocephalus anguillae (Palaeacanthocephala: Echinorhynchida)

Orosová,

Marková,

Zrzavá

et al. 2023

Parasite

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The cytogenetics of Acanthocephala is a neglected area in the study of this group of endoparasites. Chromosome number and/or karyotypes are known for only 12 of the 1,270 described species, and molecular cytogenetic data are limited to rDNA mapping in two species. The standard karyological technique and mapping of 18S rRNA and H3 histone genes on the chromosomes of Acanthocephalus anguillae individuals from three populations, one of which originated from the unfavorable environmental conditions of the Zemplínska Šírava reservoir in eastern Slovakia, were applied for the first time. All specimens had 2n = 7/8 (male/female); n = 1m + 1m-sm + 1a + 1a (X). Fluorescence in situ hybridization (FISH) revealed three loci of 18S rDNA on two autosomes and dispersion of H3 histone genes on all autosomes and the X chromosome. In addition to the standard A chromosome set, 34% of specimens from Zemplínska Šírava possessed a small acrocentric B chromosome, which was always found to be univalent, with no pairing observed between the B chromosome and the A complement. The B chromosome had a small amount of heterochromatin in the centromeric and telomeric regions of the chromosomal arms and showed two clusters of H3 genes. It is well known that an environment permanently polluted with chemicals leads to an increased incidence of chromosomal rearrangements. As a possible scenario for the B chromosome origin, we propose chromosomal breaks due to the mutagenic effect of pollutants in the aquatic environment. The results are discussed in comparison with previous chromosome data from Echinorhynchida species.

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Chromosomes of Acanthocephalus lucii

Cited by 6 publications

References 1 publication

Karyotype of Acanthocephalus lucii : the first record of supernumerary chromosomes in thorny-headed worms

Karyotype of Acanthocephalus lucii : the first record of supernumerary chromosomes in thorny-headed worms

Current knowledge on B chromosomes in natural populations of helminth parasites: a review

Chromosome analysis and the occurrence of B chromosomes in fish parasite Acanthocephalus anguillae (Palaeacanthocephala: Echinorhynchida)

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