Sexual segregation of Echinorhynchus borealis von Linstow, 1901 (Acanthocephala) in the gut of burbot (Lota lota Linnaeus)

Title:

Sexual segregation of Echinorhynchus borealis von Linstow, 1901 (Acanthocephala) in the gut of burbot (Lota lota Linnaeus)

Creator:

Tuomainen, Arto, Valtonen, E. Tellervo, and Benesh, Daniel P

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b3d428ce-939d-4f62-b2ed-a6043bfee2bf
uuid:b3d428ce-939d-4f62-b2ed-a6043bfee2bf
issn:1803-6465
doi:10.14411/fp.2015.061

Subject:

poměr pohlaví, sex ratio, thorny-headed worms, body size, Echinorhynchidae, Echinorhynchus cinctulus, microhabitat, niche, spatial distribution, 2, and 59

Type:

model:article and TEXT

Format:

electronic, počítač, and online zdroj

Description:

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., Arto Tuomainen, E. Tellervo Valtonen, Daniel P. Benesh., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

1-5

Source:

Folia parasitologica | 2015 Volume:62 | Number:1

Harvested from:

CDK

Metadata only:

false