Experimental exposure of juvenile snails (Potamopyrgus antipodarum) to infection by trematode larvae (Microphallus sp.): infectivity, fecundity compensation and growth

Host-parasite interactions that result in host castration are evolutionarily similar to predator-prey interactions because both interactions terminate reproduction for the host or prey. Yet, interactions in that infected hosts remain alive and potentially can make adjustments to their life-history s...

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Veröffentlicht in:Oecologia 1998-10, Vol.116 (4), p.575-582
Hauptverfasser: Krist, A.C, Lively, C.M
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Lively, C.M
description Host-parasite interactions that result in host castration are evolutionarily similar to predator-prey interactions because both interactions terminate reproduction for the host or prey. Yet, interactions in that infected hosts remain alive and potentially can make adjustments to their life-history strategy before castration is complete. Here we exposed juvenile snails (Potamopyrgus antipodarum) to infection by a digenetic trematode (Microphallus sp.) in order to determine whether: (1) pre-reproductive individuals could be infected, (2) individuals that were exposed to infection shifted resources to early reproduction (fecundity compensation), and (3) infected individuals exhibit altered growth rates relative to uninfected individuals. We found that juveniles are susceptible to infection; hence P. antipodarum could be selected for earlier maturation in populations where the risk of infection is high. We also found that fecundity compensation does not occur in this snail. Finally, we found that Microphallus-infected snails exhibit altered growth rates; individuals infected as juveniles have lower growth rates and are smaller than uninfected snails. These results suggest that growth is altered by infection of a trematode parasite but reproduction in uninfected snails is not induced by exposure to trematode eggs.
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Yet, interactions in that infected hosts remain alive and potentially can make adjustments to their life-history strategy before castration is complete. Here we exposed juvenile snails (Potamopyrgus antipodarum) to infection by a digenetic trematode (Microphallus sp.) in order to determine whether: (1) pre-reproductive individuals could be infected, (2) individuals that were exposed to infection shifted resources to early reproduction (fecundity compensation), and (3) infected individuals exhibit altered growth rates relative to uninfected individuals. We found that juveniles are susceptible to infection; hence P. antipodarum could be selected for earlier maturation in populations where the risk of infection is high. We also found that fecundity compensation does not occur in this snail. Finally, we found that Microphallus-infected snails exhibit altered growth rates; individuals infected as juveniles have lower growth rates and are smaller than uninfected snails. 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Invertebrata</topic><topic>Snails</topic><topic>Young animals</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Krist, A.C</creatorcontrib><creatorcontrib>Lively, C.M</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Oecologia</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Krist, A.C</au><au>Lively, C.M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Experimental exposure of juvenile snails (Potamopyrgus antipodarum) to infection by trematode larvae (Microphallus sp.): infectivity, fecundity compensation and growth</atitle><jtitle>Oecologia</jtitle><addtitle>Oecologia</addtitle><date>1998-10</date><risdate>1998</risdate><volume>116</volume><issue>4</issue><spage>575</spage><epage>582</epage><pages>575-582</pages><issn>0029-8549</issn><eissn>1432-1939</eissn><coden>OECOBX</coden><abstract>Host-parasite interactions that result in host castration are evolutionarily similar to predator-prey interactions because both interactions terminate reproduction for the host or prey. Yet, interactions in that infected hosts remain alive and potentially can make adjustments to their life-history strategy before castration is complete. Here we exposed juvenile snails (Potamopyrgus antipodarum) to infection by a digenetic trematode (Microphallus sp.) in order to determine whether: (1) pre-reproductive individuals could be infected, (2) individuals that were exposed to infection shifted resources to early reproduction (fecundity compensation), and (3) infected individuals exhibit altered growth rates relative to uninfected individuals. We found that juveniles are susceptible to infection; hence P. antipodarum could be selected for earlier maturation in populations where the risk of infection is high. We also found that fecundity compensation does not occur in this snail. Finally, we found that Microphallus-infected snails exhibit altered growth rates; individuals infected as juveniles have lower growth rates and are smaller than uninfected snails. 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source Jstor Complete Legacy; SpringerLink Journals - AutoHoldings
subjects Animal and plant ecology
Animal, plant and microbial ecology
Animals
Autoecology
Biological and medical sciences
Castration
Community Ecology
Ecological life histories
Eggs
experimental infections
Fecundity
Fundamental and applied biological sciences. Psychology
Gastropoda
host-parasite relationships
Infections
life hostory traits
Microphallus
Parasite hosts
Parasites
Parasitism
Protozoa. Invertebrata
Snails
Young animals
title Experimental exposure of juvenile snails (Potamopyrgus antipodarum) to infection by trematode larvae (Microphallus sp.): infectivity, fecundity compensation and growth
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