Relevant bibliographies by topics / Corynosoma magdaleni

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Academic literature on the topic 'Corynosoma magdaleni'

Author: Grafiati
Published: 4 June 2025
Last updated: 23 June 2025

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Journal articles on the topic "Corynosoma magdaleni"

1

Nickol, Brent B., Eero Helle, and E. T. Valtonen. "Corynosoma magdaleni in Gray Seals from the Gulf of Bothnia, with Emended Descriptions of Corynosoma strumosum and Corynosoma magdaleni." Journal of Parasitology 88, no. 6 (2002): 1222. http://dx.doi.org/10.2307/3285497.

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2

Nickol, Brent B., Eero Helle, and E. T. Valtonen. "CORYNOSOMA MAGDALENI IN GRAY SEALS FROM THE GULF OF BOTHNIA, WITH EMENDED DESCRIPTIONS OF CORYNOSOMA STRUMOSUM AND CORYNOSOMA MAGDALENI." Journal of Parasitology 88, no. 6 (2002): 1222–29. http://dx.doi.org/10.1645/0022-3395(2002)088[1222:cmigsf]2.0.co;2.

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3

Leidenberger, Sonja, Sven Boström, and Matthew Wayland. "Host records and geographical distribution of Corynosoma magdaleni, C. semerme and C. strumosum (Acanthocephala: Polymorphidae)." Biodiversity Data Journal 8 (April 6, 2020): e50500. https://doi.org/10.3897/BDJ.8.e50500.

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A literature survey was conducted to investigate the host and geographical distribution patterns of three <i>Corynosoma</i> species (Acanthocephala: Polymorphidae), <i>viz. C. magdaleni</i>, <i>C. semerme</i> and <i>C. strumosum</i>. All three species appear to be restricted to the Northern Hemisphere. Occurrence records of <i>C. magdaleni</i> are limited to the Northern Atlantic coasts, while <i>C. semerme</i> has a circumpolar distribution. The geographical range of <i>Corynosoma strumosum</i> encompasses the distributions of the other two species, but also extends into warmer southern regions. Some <i>Corynosoma</i> populations are living with their definitive hosts in very isolated locations, such as in the brackish Baltic Sea or different freshwater lakes (e.g. Lake Saimaa). All three species have a heteroxenous life cycle, comprising a peracaridan intermediate host, a fish paratenic host and a mammalian definitive host. Occasionally, an acanthocephalan may enter an accidental host, from which it is unable to complete its life cycle. The host records reported here are categorised by type, <i>i.e.</i> intermediate, paratenic, definitive or accidental. While most of the definitive hosts are shared amongst the three <i>Corynosoma</i> species, <i>C. strumosum</i> showed the broadest range of paratenic hosts, which reflects its more extensive geographical distribution. One aim of this study and extensive literature summary is to guide future sampling efforts and therewith contribute to throw more light on the on-going species and morphotype discussion for this interesting parasite species.
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4

VALTONEN, E. T., E. HELLE, and R. POULIN. "Stability of Corynosoma populations with fluctuating population densities of the seal definitive host." Parasitology 129, no. 5 (2004): 635–42. http://dx.doi.org/10.1017/s0031182004005839.

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In theory there should be a strong coupling between host and parasite population sizes. Here, we investigated population size and structure in 3 species of acanthocephalans, Corynosoma semerme, C. strumosum and C. magdaleni, in ringed seals (Phoca hispida) from the Bothnian Bay over a period of more than 20 years. During this period, seal numbers first decreased markedly and then increased steadily; at the same time, a paratenic fish host particularly important for C. strumosum has gradually disappeared from the bay due to decreasing salinity. We found no evidence that the mean abundance of any of the 3 acanthocephalan species changed significantly over time, nor was there any relationship between parasite abundance at any point in time and seal numbers in the corresponding year. Based on the proportion of sexually mature female worms per infrapopulation, and on relationships between the sex ratio of worms and infrapopulation size, both C. magdaleni and C. semerme appear to be doing well, independently of the population size of their seal definitive hosts. In contrast, perhaps because of the loss of its main paratenic host, C. strumosum appears more at risk in the Bothnian Bay. Our results show that in complex natural systems, there are not necessarily simple, direct links between definitive host population size or density, and parasite population dynamics.
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5

Sinisalo, Tuula, E. Tellervo Valtonen, Eero Helle, and Roger I. Jones. "Combining stable isotope and intestinal parasite information to evaluate dietary differences between individual ringed seals (Phoca hispida botnica)." Canadian Journal of Zoology 84, no. 6 (2006): 823–31. http://dx.doi.org/10.1139/z06-067.

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The diet and foraging behaviour of nine individual Baltic ringed seals ( Phoca hispida botnica Gmelin, 1785) in the Bothnian Bay were studied by combining results from stable isotope analyses (δ13C and δ15N) with data on intestinal parasites whose occurrence varied among the fish hosts. The patterns of infection with three acanthocephalan parasites, Corynosoma semerme (Forssell, 1904), Corynosoma magdaleni Montreuil, 1958, and Corynosoma strumosum (Rudolphi, 1802), and with a cestode larva, Schistocephalus solidus (Müller, 1776), were examined. The ringed seals become infected with these intestinal parasites by feeding on the fish hosts and hence have different parasite species and different parasite burdens according to their dietary history. δ13C and δ15N values were determined from diaphragm muscle of the seals and from tissues of potential prey items. A dual isotope plot of δ13C and δ15N values for individual seals and mean values for key potential prey species, together with the parasitological data from the seals, allowed inferences to be drawn about the feeding of individual seals. It appeared that two seals foraged particularly on fourhorn sculpin ( Myoxocephalus quadricornis (L., 1758)) and one seal consumed a high proportion of the isopod Saduria entomon (L., 1758). Three seals apparently preferred coastal benthic prey in their diets, while two other seals fed more on pelagic herring ( Clupea harengus membras L., 1761). One older female seal evidently also fed on salmon ( Salmo salar L., 1758).
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6

SINISALO, T., R. POULIN, H. HGMANDER, T. JUUTI, and E. T. VALTONEN. "The impact of sexual selection on Corynosoma magdaleni (Acanthocephala) infrapopulations in Saimaa ringed seals (Phoca hispida saimensis)." Parasitology 128, no. 2 (2004): 179–85. http://dx.doi.org/10.1017/s003118200300430x.

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7

Frimeth, Jack P. "A survey of the parasites of nonanadromous and anadromous brook charr (Salvelinus fontinalis) in the Tabusintac River, New Brunswick, Canada." Canadian Journal of Zoology 65, no. 6 (1987): 1354–62. http://dx.doi.org/10.1139/z87-215.

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A parasite survey of 1146 brook charr (Salvelinus fontinalis) was conducted between January 1981 and December 1982 in the Tabusintac River, New Brunswick, Canada. A total of 36 parasite species were recovered, of which 18 (one Myxosporea, two Monogenea, three Digenea, three Cestoidea, five Nematoda, one Acanthocephala, one Hirudinoidea, one Crustacea, and a Dermocystidium sp.) were freshwater and 18 (two Monogenea, seven Digenea, two Cestoidea, two Nematoda, two Acanthocephala, and three Crustacea) were marine. Anadronomous charr were differentiated from nonanadromous charr in fresh water by the presence of marine parasites. Charr in the estuary and lagoon were all considered to be anadromous; however, first-time anadromous charr or smolts were differentiated by the absence of marine parasites and infection with freshwater parasites only. New host records include Lecithaster gibbosus, Zoogonus lasius, Podocotyle angulata, Cryptocotyle lingua (metacercariae), Stephanostomum tenue (metacercariae, adults), Eubothrium crassum, Tetraphyllidea gen. sp. (plerocercoids), Eustrongylides sp. (larvae), Hysterothylacium aduncum (larvae, adults), Corynosoma magdaleni (juveniles), Argulus alosae, and Ergasilus labracis. Zoogonus lasius and Stephanostomum tenue represent new Canadian records, and Chloromyxum truttae and Truttaedacnitis truttae are reported for the first time from New Brunswick. Bulbodacnitis alpinus, previously reported only from the Arctic charr (Salvelinus alpinus), is considered to be a synonym of T. truttae.
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8

Lakemeyer, J., K. Lehnert, B. Woelfing, et al. "Pathological findings in North Sea and Baltic grey seal and harbour seal intestines associated with acanthocephalan infections." Diseases of Aquatic Organisms 138 (February 27, 2020): 97–110. http://dx.doi.org/10.3354/dao03440.

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Grey seals Halichoerus grypus and harbour seals Phoca vitulina are common seal species in the North and Baltic seas and final hosts of Corynosoma acanthocephalans. C. strumosum and C. magdaleni infect the small intestines of both seal species. In contrast to harbour seals, Baltic grey seals in the past have regularly displayed severe C. semerme infections in the caecum and colon, with associated tunica muscularis hypertrophy, inflammation and ulcerations as part of the Baltic seal disease complex (BSDC). Pathogenesis and correlation of acanthocephalan infections with these lesions are still unknown. This study describes the intestinal pathology and parasitic distribution in each seal species. Grey seal (n = 83) and harbour seal (n = 1156) intestines of all age groups and sexes, collected in Poland, Germany and Estonia from 1998 to 2017, were investigated. Most harbour seals came from the North Sea, whereas grey seals were predominantly derived from the Baltic Sea. Both species featured mild to moderate small intestinal infections. Grey seals showed colonic infections not found in harbour seals and featured a chronic erosive to ulcerative, eosinophilic or lympho-plasmacytic colitis with tunica muscularis hypertrophy, indicating still prevailing clinical signs of the BSDC. Harbour seals displayed granulomatous, eosinophilic, lympho-plasmacytic or catarrhal enteritis. The prevalence of acanthocephalan infections in harbour seals increased from 2012 onwards. Furthermore, significant associations between acanthocephalan infection and the presence of intestinal inflammation were found for both seal species. This study suggests that the level of acanthocephalan infection and associated lesions are suitable seal population health indicators, with the colon being a specific target organ for Baltic grey seal health monitoring.
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9

Leidenberger, Sonja, Sven Boström, and Matthew Wayland. "Host records and geographical distribution of Corynosoma magdaleni, C. semerme and C. strumosum (Acanthocephala: Polymorphidae)." Biodiversity Data Journal 8 (April 6, 2020). http://dx.doi.org/10.3897/bdj.8.e50500.

Full text
Abstract:
A literature survey was conducted to investigate the host and geographical distribution patterns of three Corynosoma species (Acanthocephala: Polymorphidae), viz. C. magdaleni, C. semerme and C. strumosum. All three species appear to be restricted to the Northern Hemisphere. Occurrence records of C. magdaleni are limited to the Northern Atlantic coasts, while C. semerme has a circumpolar distribution. The geographical range of Corynosoma strumosum encompasses the distributions of the other two species, but also extends into warmer southern regions. Some Corynosoma populations are living with their definitive hosts in very isolated locations, such as in the brackish Baltic Sea or different freshwater lakes (e.g. Lake Saimaa). All three species have a heteroxenous life cycle, comprising a peracaridan intermediate host, a fish paratenic host and a mammalian definitive host. Occasionally, an acanthocephalan may enter an accidental host, from which it is unable to complete its life cycle. The host records reported here are categorised by type, i.e. intermediate, paratenic, definitive or accidental. While most of the definitive hosts are shared amongst the three Corynosoma species, C. strumosum showed the broadest range of paratenic hosts, which reflects its more extensive geographical distribution. One aim of this study and extensive literature summary is to guide future sampling efforts and therewith contribute to throw more light on the on-going species and morphotype discussion for this interesting parasite species.
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10

Leidenberger, Sonja, Sven Boström, and Matthew T. Wayland. "Morphological observations on three Baltic species of Corynosoma Lühe, 1905 (Acanthocephala, Polymorphidae)." European Journal of Taxonomy, no. 514 (April 10, 2019). http://dx.doi.org/10.5852/ejt.2019.514.

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Necropsies of Baltic grey (Halichoerus grypus) and ringed seals (Pusa hispida) presented a rare opportunity to study their acanthocephalan fauna. Both species hosted adults of three species of the genus Corynosoma Lühe, 1904, namely C. magdaleni Montreuil, 1958, C. semerme (Forsell, 1904) Lühe 1911 and C. strumosum (Rudolphi, 1802) Lühe 1904. A comparative morphological analysis of these three species of Corynosoma, combining both light and scanning electron microscopy, was performed for the first time. Sexual dimorphism in the size and shape of the trunk was observed in both C. magdaleni and C. semerme, but there was insufficient material to investigate this phenomenon in C. strumosum. Genital spines were not observed in any of the female acanthocephalans. Three possible explanations for the presence of genital spines in some females, but not others are (i) cryptic speciation, (ii) phenotypic variation and (iii) loss by extraction or shearing when the copulatory cap is released. Copulatory caps were observed on female C. semerme. The size and morphology showed considerable variability and all caps were strongly autofluoresecent.
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