ERA

Download the full-sized PDF of A Mark-Recapture Study of Trematode Parasitism in Overwintered Helisoma anceps (Pulmonata), with Special Reference to Halipegus occidualis (Hemiuridae).Download the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R38P5VM5Z

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Biological Sciences, Department of

Collections

This file is in the following collections:

Journal Articles (Biological Sciences)

A Mark-Recapture Study of Trematode Parasitism in Overwintered Helisoma anceps (Pulmonata), with Special Reference to Halipegus occidualis (Hemiuridae). Open Access

Descriptions

Author or creator
Goater, T.M.
Shostak, A.W.
Williams, J.A.
Esch, G.W.
Additional contributors
Subject/Keyword
Helisoma anceps
parasitic infections
North Carolina
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
A collection of 556 snails, Helisoma anceps, was made from a pond in the Piedmont area of North Carolina during October 1987. Snails were measured and assayed for trematode parasitism, and then 500 randomly selected individuals were marked and returned to the pond. Collections made between 23 March and 12 July 1988 resulted in recapture of 86 marked snails. Five trematode species were present in the fall collection, dominated by the hemiurid Halipegus occidualis (present in 31.5% of all snails, and 84.5% of infected snails). Antagonistic interactions between H. occidualis and other trematodes were indicated by a lower proportion of multiple-species infections in the fall collection than predicted from trematode prevalences and snail size distribution. Spring collections resulted in recapture of 31 snails that had patent infections in the fall collection. Of these, 7 of 27 previously infected with H. occidualis no longer harbored patent infections, nor did 2 of 3 previously infected with Megalodiscus temperatus, or the single recaptured snail that previously had a patent infection with Diplostomulums cheuringi. Necropsy of 5 of 7 snails previously infected with H. occidualis revealed an intact ovotestis and no parasites, confirming loss of infection and reversal of parasitic castration. The number of new patent infections increased markedly between late March and early June, suggesting that acquisition of new infections commenced soon after snails emerged from the substratum in early March. Snail survival over the winter was independent of parasitic infection. Growth rates of snails harboring H . occidualis before and after the winter were similar to uninfected snails, but snails that became patent subsequent to the fall collection grew less than predicted. The consistency observed for fall and spring prevalences of H. occidualis reflects a dynamic balance among processes that tend to increase prevalence and others that tend to decrease it.
Date created
1989
DOI
doi:10.7939/R38P5VM5Z
License information
Rights
Copyright American Society of Parasitologists 1989
Citation for previous publication
Goater, T.M., Shostak, A.W., Williams, J.A., and Esch, G.W. (1989). A Mark-Recapture Study of Trematode Parasitism in Overwintered Helisoma anceps (Pulmonata), with Special Reference to Halipegus occidualis (Hemiuridae). The Journal of Parasitology , 75(4), 553-560
Source
Link to related item

File Details

Date Uploaded
Date Modified
2014-05-01T00:13:11.530+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 1280440
Last modified: 2015:10:12 17:58:42-06:00
Filename: JOPara_75_1989_553.pdf
Original checksum: 7a796db5d5d8dcf983acc2f5a5f198c6
Well formed: true
Valid: false
Status message: Invalid outline dictionary item offset=3713
File title: A Mark-Recapture Study of Trematode Parasitism in Overwintered Helisoma anceps (Pulmonata), with Special Reference to Halipegus occidualis (Hemiuridae)
Page count: 8
File language: en
Activity of users you follow
User Activity Date