Document Detail

Dynamics of the platyhelminth fauna of wood ducks in relation to food habits and reproductive state.
MedLine Citation:
PMID:  6854477     Owner:  NLM     Status:  MEDLINE    
The dynamics of the intestinal helminth fauna of wood ducks (Aix sponsa) and the relationship between changes in food habits and helminth populations during the bird's reproductive cycle were studied in southeast Missouri. A total of 11 species of helminths, comprised of four species of trematodes and seven species of cestodes, were recovered from the digestive tracts of 155 wood ducks. All species except one were found in both sexes. Significant differences were found in parasite numbers by season (spring vs. fall), sex, and stage of the reproductive cycle. Helminth infection in both sexes was higher in the spring than during fall courtship; however, the magnitude of the seasonal difference was considerably greater in females. Females contained significantly more helminths than males during spring, but no sex-related differences were detected in the fall. Seasonal changes and sex-related differences in parasite numbers corresponded closely with the consumption of invertebrates that serve as intermediate hosts. The average number of parasites in females was similar during fall courtship and pre-egg-laying, suggesting that little or no new infection occurred during winter. The most intensive infections were found in laying females and were attributed to hyperphagia and increased invertebrate consumption during egg production. A large decrease in the parasite numbers in females between incubation and fall courtship indicated that most of the helminths acquired by laying females were lost during summer; therefore, the long-term effects of the increased infection are probably negligible.
R D Drobney; C T Train; L H Fredrickson
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of parasitology     Volume:  69     ISSN:  0022-3395     ISO Abbreviation:  J. Parasitol.     Publication Date:  1983 Apr 
Date Detail:
Created Date:  1983-07-29     Completed Date:  1983-07-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7803124     Medline TA:  J Parasitol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  375-80     Citation Subset:  IM    
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MeSH Terms
Bird Diseases / epidemiology*
Cestode Infections / epidemiology,  veterinary*
Ducks / parasitology*,  physiology
Feeding Behavior
Trematode Infections / epidemiology,  veterinary*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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