Uncinaria hamiltoni (Nematoda: Ancylostomatidae) in South American Sea Lions, Otaria flavescens, From Northern Patagonia, Argentina

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Berón-Vera, B. ; Crespo, Enrique Alberto ; Raga Esteve, Juan Antonio ; Pedraza, S. N. (2004)
  • Related identifiers: doi: 10.1645/GE-182R
  • Subject: Uncinaria hamiltoni ; Ancylostomatidae ; Sea Lions ; Northern Patagonia, argentina | UNESCO::CIENCIAS DE LA VIDA | UNESCO::CIENCIAS DE LA VIDA::Biología animal (Zoología) ::Parasitología animal
    mesheuropmc: education | parasitic diseases

Thirty-one South American sea lion pups (Otaria flavescens) found dead in Punta León, Argentina, during the summer of 2002, were examined for hookworms (Uncinaria hamiltoni). Parasite parameters were analyzed in 2 locations of the rookery, i.e., a traditional, well-structured breeding area and an expanding area with juveniles and a lax social structure. Prevalence of hookworms was 50% in both localities, and no difference was observed in prevalence between pup sexes (P > 0.05). Hookworms were concentrated in the small intestine. Transmammary transmission is assumed because only adult hookworms were found in the pups. The mean intensity of hookworms per pup was 135; the mean intensity in females (92.78) was significantly different (P < 0.05) from that of males (230.25). No difference (P > 0.05) in intensity was found between the 2 breeding areas, although prevalence was higher in the traditional breeding area than in the other area. Location was the only factor affecting hookworm prevalence (P log-linear model: 0.9552; χ2: 1.5629). No apparent trend between body condition and intensity of hookworms was observed. Raga Esteve, Juan Antonio, Toni.Raga@uv.es
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