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A Mark-Recapture Study of Trematode Parasitism in Overwintered Helisoma anceps (Pulmonata), with Special Reference to Halipegus occidualis (Hemiuridae).
Download1989
Shostak, A.W., Esch, G.W., Goater, T.M., Williams, J.A.
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...
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1993
Density-dependent constraints on parasite growth, survival or reproduction are thought to be important in preventing the unchecked increase in parasite numbers within individual hosts or host populations. While it is important to know where, and with what severity, density dependence is acting...
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Effects of Source of Metacercariae on Experimental Infection of Zygocotyle lunata (Digenea: Paramphistomidae) in CD-1 Mice.
Download1993
Shostak, A.W., Belosevic, M., Dharampaul, S.
Outbred (CD-1 strain) mice were infected experimentally with metacercariae of Zygocotyle lunata obtained from naturally infected Helisoma trivolvis. Growth, survival, and fecundity of the parasite and gross pathology in the host were evaluated. Metacercariae from 5 snail sources produced 3...
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Helminth position within the intestine of naturally infected pike (Esox lucius) relative to host stomach contents
Download1989
The positions of 3 cestode species, Triaenophorucs rassusF orel, Triaenophoruns odulosus( Pallas), and Proteocephalus pinguis LaRue, and a nematode, Raphidascaris acus (Bloch), within the intestine of naturally infected pike (Esox lucius L.) were evaluated with respect to the presence or absence...
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Manipulation of host food availability and use of multiple exposures to assess the crowding effect on Hymenolepis diminuta in Tribolium confusum
Download2008
Walsh, J.G., Wong, Y.C., Shostak, A.W.
We studied the ‘crowding effect’ in Tribolium confusum infected with Hymenolepis diminuta. Manipulations included age and number of parasites, and diet, sex, age and number of exposures of hosts. Volume per parasite was unaffected until an intensity of at least 5–10 parasites per host, then...
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1997
Lafferty, K.D., Shostak, A.W., Bush, A.O., Lotz, J.M.
W: e consider 27 populationa nd communityt erms used frequentlyb y parasitologistsw hen describingt he ecology of parasites. We provide suggestions for various terms in an attempt to foster consistent use and to make terms used in parasite ecology easier to interpret for those who study...
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Photocycle-Dependent Emergence by Cercariae of Halipegus occidualis from Helisoma anceps, with Special Reference to Cercarial Emergence Patterns as Adaptations for Transmission.
Download1990
Emergence by cercariae of Halipegus occidualis (Hemiuridae) from naturally infected Helisoma anceps (Pulmonata) was evaluated with respect to change in temperature and light. Total cercarial emergence per snail per day increased with temperature in 2 experiments: at constant temperatures of 16,...
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Shape Variation of Cysticercoids of Hymenolepis diminuta (Cyclophyllidea) from Fed, Partially Fed, and Fasted Tribolium confusum (Coleoptera)
Download2006
Quantitative studies of a crowding effect on cysticercoids of Hymenolepis diminuta in the intermediate host are few and limited in scope. In this study, we developed a technique to rapidly collect morphological information on large numbers of parasites, and verified the utility of geometric...