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Revision of the species complex Amidostomum acutum (Lundahl, 1848) (Nematoda: Amidostomatidae).

Kavetska KM, Królaczyk K, Stapf A, Grzesiak W, Kalisińska E, Pilarczyk B - Parasitol. Res. (2011)

Bottom Line: Unsupervised classification was performed using a Kohonen artificial neural network.Taking into account the qualitative characteristics of the parasites, one can 100% accurately identify these species.The three groups of parasites were also significantly different in their ecology, manifested in their distinct host specificity.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Biology and Ecology of Parasites, West Pomeranian University of Technology, Judyma Str. 20, 71-466 Szczecin, Poland. katarzyna.kavetska@zut.edu.pl

ABSTRACT
Most available literature indicates that the most dominant nematode in Anatinae is a cosmopolitan species Amidostomum acutum (Lundahl, 1848). However, studies on wild duck helminthofauna in northwestern Poland suggest that these birds are attacked by not one but three different parasite species, previously described as a single species. Hence the aim of this study was the redescription of the species complex Amidostomum acutum, conducted on a representative sample of parasites and their hosts. The study material consisted of 6,430 nematode individuals, isolated from the digestive tracts of 1,005 wild ducks, representing 17 species. Unsupervised classification was performed using a Kohonen artificial neural network. The analysis confirmed the division of nematodes into three groups corresponding to three species, both for males and females. Taking into account the qualitative characteristics of the parasites, one can 100% accurately identify these species. The three groups of parasites were also significantly different in their ecology, manifested in their distinct host specificity.

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The distribution of canonical variables for males and females of parasitic nematodes
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Fig1: The distribution of canonical variables for males and females of parasitic nematodes

Mentions: The results are confirmed by the scatterplot for canonical values for pairs of discriminant functions (Fig. 1). Individual cases were located in three clusters belonging to the species studied, particularly evidently in the case of males. In females, although three characteristic groups can also be distinguished—Amidostomoides monodon is clearly located on the left of the graph—for the remaining two species the distinction is visible but not as clear.Fig. 1


Revision of the species complex Amidostomum acutum (Lundahl, 1848) (Nematoda: Amidostomatidae).

Kavetska KM, Królaczyk K, Stapf A, Grzesiak W, Kalisińska E, Pilarczyk B - Parasitol. Res. (2011)

The distribution of canonical variables for males and females of parasitic nematodes
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3118003&req=5

Fig1: The distribution of canonical variables for males and females of parasitic nematodes
Mentions: The results are confirmed by the scatterplot for canonical values for pairs of discriminant functions (Fig. 1). Individual cases were located in three clusters belonging to the species studied, particularly evidently in the case of males. In females, although three characteristic groups can also be distinguished—Amidostomoides monodon is clearly located on the left of the graph—for the remaining two species the distinction is visible but not as clear.Fig. 1

Bottom Line: Unsupervised classification was performed using a Kohonen artificial neural network.Taking into account the qualitative characteristics of the parasites, one can 100% accurately identify these species.The three groups of parasites were also significantly different in their ecology, manifested in their distinct host specificity.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Biology and Ecology of Parasites, West Pomeranian University of Technology, Judyma Str. 20, 71-466 Szczecin, Poland. katarzyna.kavetska@zut.edu.pl

ABSTRACT
Most available literature indicates that the most dominant nematode in Anatinae is a cosmopolitan species Amidostomum acutum (Lundahl, 1848). However, studies on wild duck helminthofauna in northwestern Poland suggest that these birds are attacked by not one but three different parasite species, previously described as a single species. Hence the aim of this study was the redescription of the species complex Amidostomum acutum, conducted on a representative sample of parasites and their hosts. The study material consisted of 6,430 nematode individuals, isolated from the digestive tracts of 1,005 wild ducks, representing 17 species. Unsupervised classification was performed using a Kohonen artificial neural network. The analysis confirmed the division of nematodes into three groups corresponding to three species, both for males and females. Taking into account the qualitative characteristics of the parasites, one can 100% accurately identify these species. The three groups of parasites were also significantly different in their ecology, manifested in their distinct host specificity.

Show MeSH
Related in: MedlinePlus