Uncinaria lucasi

Uncinaria lucasi Hookworm	Contents	Rev 12/21/2022
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Uncinaria menu		Ecosystem Functions and Services
	Distribution	Management
Return to Ancylostomidae Menu	Feeding	References
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Classification

Phylum: Nematoda
Class: Chromadorea
Order: Rhabditida

Superfamily: Strongyloidea

Family: Ancylostomidae

Uncinaria lucasi Stiles, 1901

Morphology and Anatomy:

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Distribution

Economic Importance:

Hosts:

Uncinaria lucasi is a frequent parasite of seals and sea linons.

Feeding

Life Cycle:

The life cycle of Uncinaria lucasi in juvenile fur seals that inhabist the Pribilof Isalnds of Alaska consists of three basic stages:

1) the free-living phase with eggs and free-living third-stage larvae in the soil;

2) the tissue phase wherein parasitic third-stage larvae occur in all age groups of seals, particularly in the blubber of the belly region, and in the case of females, also in the mammary glands and milk cisterns. The infection occurs primarily through the skin, especially the skin of the flippers.

3) the intestinal phase consisting of fourth-stage larvae and adult nematodes in the intestine of young pups. Infection of young pups is by the parasitic third-stage larvae which are passed in the milk in the mother's milk.The nematodes in the intestinal phase reach adulthood in 13 to 15 days and are eliminated spontaneously from all pups about 3 months post infection. Seals do not become reinfected and all adults are free of hookworms. (Olsen and Lyons, 1965; Nadler et al., 2000).

For Ecophysiological Parameters for this species, click	If species level data are not available, click for genus level parameters

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Damage:

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Management:

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References:

Nadler, S.A., Adams, B.J., Lyons, E.T., DeLong, R.L., Melin, S.R. 2000. Molecular and morphometric evidence for separate species of Uncinaria (Nematoda: Ancylostomidae) in California sea lions and Northern fur seals: hypothesis testing supplants verification. J. Parasitol., 86:1099-1106.

Olsen, O.W. and Lyons, E.T. 1965. Life cycle of Uncinaria lucasi Stiles, 1901 (Nematoda: Ancylostomidae) of fur seals, Callorhinus ursinus Linn., on the Pribilof Islands, Alaska. J. Parasitology 51:689-700.

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