Spatial and temporal changes in prevalence of a cloacal cestode in wintering waterfowl along the Gulf Coast of Texas.
J Wildl Dis
; 39(1): 152-60, 2003 Jan.
Article
en En
| MEDLINE
| ID: mdl-12685079
ABSTRACT
The cloacal cestode Cloacotaenia megalops is one of the most common helminths of waterfowl. We investigated the effect of this parasite on the body condition of wintering waterfowl populations and compared prevalence among age-sex classes, over time and between habitat types on the upper Gulf Coast of Texas (USA) from October 1986-February 2000. Greater than 9,500 birds of 25 waterfowl species were examined for the parasite. There was no statistical difference (P > 0.05) in body condition between birds with and without the parasite. Average prevalence was lowest for geese (mean = 3.7%) versus 21 to 71% in duck species. Average prevalence was similar (P = 0.81) between diving ducks (mean = 46.9%) and puddle ducks (mean = 43.9%). Prevalence varied among age-sex classes and was related to sex rather than age. Variation among age-sex classes suggests differences in diet between sexes of duck species on the wintering grounds. There was no evidence for declining prevalence over the wintering period. Prevalence differed (P < 0.05) between collection sites, and thereby habitat types, for several species. Temporal trends indicate stable prevalence of C. megalops for diving ducks and increasing prevalence for puddle ducks. The increasing trend for puddle ducks may indicate declining habitat conditions resulting in increased exposure to the intermediate ostracod host.
Search on Google
Banco de datos:
MEDLINE
Asunto principal:
Enfermedades de las Aves
/
Infecciones por Cestodos
/
Cloaca
/
Patos
/
Gansos
Tipo de estudio:
Prevalence_studies
/
Risk_factors_studies
Límite:
Animals
País como asunto:
America do norte
Idioma:
En
Año:
2003
Tipo del documento:
Article