Sexual segregation of Echinorhynchus borealis von Linstow, 1901 (Acanthocephala) in the gut of burbot (Lota lota Linnaeus)
Tuomainen, A., Valtonen, T., & Benesh, D. (2015). Sexual segregation of Echinorhynchus borealis von Linstow, 1901 (Acanthocephala) in the gut of burbot (Lota lota Linnaeus). Folia Parasitologica, 62, Article 061. https://doi.org/10.14411/fp.2015.061
Julkaistu sarjassa
Folia ParasitologicaPäivämäärä
2015Tekijänoikeudet
© 2015 the Authors. Published by Akademie Ved Ceske Republiky. This is an Open Access article distributed under the terms of the Creative Commons Attribution License.
Helminths often occupy defined niches in the gut of their definitive hosts. In the dioecious acanthocephalans, adult males
and females usually have similar gut distributions, but sexual site segregation has been reported in at least some species. We studied
the intestinal distribution of the acanthocephalan Echinorhynchus borealis von Linstow, 1901 (syn. of E. cinctulus Porta, 1905) in its
definitive host, burbot (Lota lota Linnaeus). Over 80% of female worms were found in the pyloric caeca, whereas the majority of males
were in the anterior two-thirds of the intestine. This difference was relatively consistent between individual fish hosts. Worms from
different parts of the gut did not differ in length, so site segregation was not obviously related to worm growth or age. We found proportionally
more males in the caeca when a larger fraction of the females were found there, suggesting mating opportunities influence
gut distribution. However, this result relied on a single parasite infrapopulation and is thus tentative. We discuss how mating strategies
and/or sexual differences in life history might explain why males and females occupy different parts of the burbot gut.
...
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Akademie Ved Ceske RepublikyISSN Hae Julkaisufoorumista
1803-6465Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/25280938
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