| observations on the infectivity of parasitic third-stage larvae of uncinaria lucasi stiles 1901 (nematoda: ancylostomatidae) of northern fur seals, callorhinus ursinus linn., on st. paul island, alaska. | twelve fur seal pups, which had not nursed their mothers, were used in an infectivity experiment. pups were exposed to parasitic 3rd-stage larvae of uncinaria lucasi from belly tissues of fur seal bulls, bachelors, and pregnant cows, to determine maturation capability of the larvae. hookworms were not recovered from the intestines of 3 pups receiving larvae from belly blubber of bulls, 6 pups receiving larvae from belly blubber of bachelors, and 1 nonexposed pup. maturation of hookworms did occu ... | 1978 | 149188 |
| activities of dichlorvos or disophenol against the hookworm (uncinaria lucasi) and sucking lice of northern fur seal pups (callorhinus ursinus) on st. paul island, alaska. | one controlled and six critical tests were conducted in july, 1977 with northern fur seal pups (callorhinus ursinus) to determine the efficacies of a single dose of dichlorvos capsules at 29.3 to 32.8 mg/kg, tablets at 10.5 to 11.5 mg/kg, or disophenol at 9.9 mg/kg given subcutaneously against natural infections of adult uncinaria lucasi. in the controlled test, 20 pups were treated and 10 pups were nontreated. removal of hookworms in this test was 99% for five pups receiving dichlorvos capsules ... | 1978 | 739586 |
| maternal transmission by alaria marcianae (trematoda) and the concept of amphiparatenesis. | the term amphiparatenic host was coined originally for hosts of alaria marcianae that as adults are paratenic hosts, but as juveniles serve as definitive hosts. in this study the concept of amphiparatenesis is placed in a theoretical context, maternal transmission shown to be the basic mechanism, and the concept extended to include toxocara canis, t. cati, t. pteropodis, neoascaris vitulorum, ancylostoma caninum, uncinaria lucasi, various species of strongyloides, pharyngostomoides procyonis, an ... | 1987 | 3572644 |
| life cycle of uncinaria lucasi stiles, 1901 (nematoda: ancylostomatidae) of fur seals, callorhinus ursinus linn., on the pribilof islands, alaska. | | 1965 | 5892851 |
| further indication of viability of larvae of the hookworm (uncinaria lucasi) for several years in tissues of northern fur seals (callorhinus ursinus). | | 1984 | 6541690 |
| variable activity of disophenol against hookworms and lice of northern fur seal pups on st. paul island, alaska. | six critical tests with disophenol were conducted in july, 1978, in fur seal pups (callorhinus ursinus) naturally-infected with adult hookworms, uncinaria lucasi, and infested with various stages of two species of sucking lice, proechinopthirus fluctus (ferris) and antarctophthirus callorhini (osborn). disophenol at a dose rate of 12.5 mg/kg was administered subcutaneously to each of six pups. each pup was contained in an individual cage for 60 h posttreatment at which time pups were exmained at ... | 1980 | 7373724 |
| the impact of parasites on marine mammals: a review. | the design and implementation of conservation plans for marine mammals is a matter of public concern. however, very little is known about the role of parasites in the dynamics of marine mammal populations. this is probably due to methodological constraints concerning sampling biases, poor knowledge of the biology of the hosts and parasites and difficulty and costy of experimental studies. however, current evidence supports the theory that parasites may regulate marine mammal populations. crassic ... | 1997 | 9802082 |
| historic importance of some aspects of research by o. wilford olsen on hookworms (uncinaria lucasi) in northern fur seals (callorhinus ursinus) and steller sea lions (eumatopias jubatus) in 1951 on st. paul island, alaska. | the purpose of this paper is to disseminate, more widely, certain historically important aspects of research by o. wilford olsen on hookworms (uncinaria lucasi) in northern fur seals (callorhinus ursinus) and steller sea lions (eumatopias jubatus) in 1951 on st. paul island, alaska. highly meaningful facets of the research were recorded only in a report with limited availability by olsen in 1952. portions of his research presented here include measurements of hookworm free-living infective third ... | 2005 | 15719260 |
| first report and characterization of adult uncinaria spp. in new zealand sea lion (phocarctos hookeri) pups from the auckland islands, new zealand. | two species of hookworms (uncinaria lucasi and uncinaria hamiltoni) have been formally described from pinnipeds, but dissimilar types are noted from these hosts. this report is the first description of hookworms (uncinaria spp.) from the new zealand sea lion, phocarctos hookeri. the nematodes were collected from dead pups on enderby island (auckland islands, 50 degrees 30', 166 degrees 17') during january and february, 2004. standard measurements of male and female hookworms were obtained, provi ... | 2006 | 16362338 |
| hookworms (uncinaria lucasi) and acanthocephalans (corynosoma spp. and bolbosoma spp.) found in dead northern fur seals (callorhinus ursinus) on st. paul island, alaska in 2007. | intestines of dead northern fur seals (callorhinus ursinus) on st. paul island (spi), alaska were inspected for specific internal parasites (hookworms and acanthocephalans) in july and august, 2007. pups (n=64) were examined for adult hookworms (uncinaria lucasi) and four (6.25%) were infected. the number of specimens per infected pup was 1, 2, 2, or 408. low prevalence was similar to that determined in the last investigation (2001) in dead fur seal pups on spi by two of the present authors (lyo ... | 2008 | 18587686 |
| a redescription of uncinaria lucasi stiles, a hookworm of seals. | | 1947 | 20255201 |
| investigations of peritoneal and intestinal infections of adult hookworms (uncinaria spp.) in northern fur seal (callorhinus ursinus) and california sea lion (zalophus californianus) pups on san miguel island, california (2003). | the peritoneal cavity (pnc) and intestine of northern fur seal (callorhinus ursinus) pups and california sea lion (zalophus californianus) pups that died in late july and early august, 2003, on san miguel island, california, were examined for hookworms. prevalence and morphometric studies were done with the hookworms in addition to molecular characterization. based on this and previous molecular studies, hookworms from fur seals are designated as uncinaria lucasi and the species from sea lions a ... | 2011 | 21347520 |
| review of research on hookworms (uncinaria lucasi stiles, 1901) in northern fur seals (callorhinus ursinus linnaeus, 1758). | the objective of this article is to review knowledge on the hookworm uncinaria lucasi stiles, 1901 in northern fur seals, callorhinus ursinus linnaeus, 1758. emphasis is placed on research on this host-parasite system in the pribilof islands, ak, usa where the bulk of the studies has been performed. | 2011 | 21537983 |
| uncinaria sanguinis sp. n. (nematoda: ancylostomatidae) from the endangered australian sea lion, neophoca cinerea (carnivora: otariidae). | this study investigates the identity of hookworms parasitising the australian sea lion, neophoca cinerea (péron), from three colonies in south australia, australia. the australian sea lion is at risk of extinction because its population is small and genetically fragmented. using morphological and molecular techniques, we describe a single novel species, uncinaria sanguinis sp. n. (nematoda: ancylostomatidae). the new species is most similar to hookworms also parasitic in otariid hosts, uncinaria ... | 2014 | 25065131 |
| molecular systematics of pinniped hookworms (nematoda: uncinaria): species delimitation, host associations and host-induced morphometric variation. | hookworms of the genus uncinaria have been widely reported from juvenile pinnipeds, however investigations of their systematics has been limited, with only two species described, uncinaria lucasi from northern fur seals (callorhinus ursinus) and uncinaria hamiltoni from south american sea lions (otaria flavescens). hookworms were sampled from these hosts and seven additional species including steller sea lions (eumetopias jubatus), california sea lions (zalophus californianus), south american fu ... | 2013 | 24162075 |
| update on the prevalence of the hookworm, uncinaria lucasi, in northern fur seals (callorhinus ursinus) on st. paul island, alaska, 2011. | prevalence of hookworms (uncinaria lucasi stiles, 1901) was determined in the northern fur seal (callorhinus ursinus linnaeus, 1758) on st. paul island (spi), alaska in july and august, 2011. three of 61 (4.9%) dead pups harbored 1 to 13 adult hookworms each in their intestines. parasitic larvae (l(3)) of hookworms were recovered from the blubber of 4 of 133 (3%) of subadult males (sams) examined. one parasitic l(3) was detected from each infected sam. adult u. lucasi (n = 3) were found in the i ... | 2012 | 22398833 |