Castrating effects of trematode larvae on the reproductive success of a highly parasitized population of Crepipatella dilatata (Caenogastropoda) in Argentina

Crepipatella dilatata (Calyptraeidae) is a common intertidal or shallow subtidal protandric hermaphroditic gastropod. Intertidal snails from Puerto Madryn, Chubut, Argentina (42°46′37″S, 64°54′51″ W), showed a high prevalence, up to 46 %, of a castrating larval microphallid trematode. Reproductive s...

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Bibliographic Details
Published in:Marine biology 2012-10, Vol.159 (10), p.2259-2267
Main Authors: Gilardoni, Carmen, Ituarte, Cristián, Cremonte, Florencia
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal reproduction
Animal, plant and microbial ecology
Biological and medical sciences
Biomedical and Life Sciences
Caenogastropoda
Calyptraeidae
Crepipatella
Females
Freshwater & Marine Ecology
Fundamental and applied biological sciences. Psychology
Gastropoda
Invertebrates
Larvae
Larval development
Life Sciences
Marine
Marine & Freshwater Sciences
Marine biology
Microbiology
Mollusks
Nemathelminthia. Plathelmintha
Oceanography
Original Paper
Parasites
Parasitism
Reproduction
Sea water ecosystems
Snails
Synecology
Zoology
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Summary:Crepipatella dilatata (Calyptraeidae) is a common intertidal or shallow subtidal protandric hermaphroditic gastropod. Intertidal snails from Puerto Madryn, Chubut, Argentina (42°46′37″S, 64°54′51″ W), showed a high prevalence, up to 46 %, of a castrating larval microphallid trematode. Reproductive success was studied during a 2-year period from September 2007 to August 2009, and the results were compared to those from an unparasitized subtidal sample. Brooding females and males were never found infected. The proportion of brooding females was higher in months with a higher prevalence of infection. The number of brooding females in the intertidal sample was higher than in the subtidal sample. Generalized linear models were utilized to determine the effects of parasitism on the reproductive success of the host population. Anticipated reproduction in smaller females in the intertidal sample, increased reproductive success in months with higher prevalence, and unparasitized males are interpreted as fitness responses to ensure host population survival when the prevalence of trematode infection is high.
ISSN:0025-3162
1432-1793
DOI:10.1007/s00227-012-2011-9