Habitat Specificity and Correlated Aminopeptidase Activity in the Acanthocephalans Neoechinorhynchus cristatus and N. crassus

Uglem, Gary L.; Beck, S. M.

doi:10.2307/3286585

Cited by 39 publications

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“…First, many helminths do select a restricted portion of the intestine ; when introduced into other regions, they move to the preferred area (reviewed by Crompton, 1976). Second, the ranges occupied by gravid specimens are often smaller than those occupied by imma ture specimens (e. g., Uglem and Beck, 1972), as expected, assuming the requirements for reproduction are more strin gent than for survival. Third, when population sizes increase, most helminths do not change their location (as measured by the position of the median individual or unit of biomass), but do extend the range they occupy (for exam ples, see Stock and Holmes, 1988).…”

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confidence: 81%

“…The morphological matching of the scolices of Echeneibothrium and the mucosal surface of specific parts of the spiral intestine of rays are wellknown. The metabolic matching of the aminopeptidases of acanthocephalans and specific parts of the intestine of their host fish (Uglem and Beck, 1972) are less well-known, but such physiological specializations are probably more common.…”

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confidence: 99%

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Competition, contacts, and other factors restricting niches of parasitic helminths

Holmes

1990

Ann. Parasitol. Hum. Comp.

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SummaryMechanisms that restrict the intraintestinal niches of helminths (as indicated by the sites they occupy) can be favored by several selection pressures. These selection pressures act on different scales, and may interact to have different effects in different circumstances.In addition, the end results may not reflect responses to the niche, but be a by-product of other processes, such as the immune res ponses of the host. Les mécanismes qui limitent la niche des helminthes intestinaux (marquée par leur place dans l'intestin), peuvent être favorisés par diverses pressions sélectives. Ces pressions sélectives agissent à des niveaux différents, et par leurs interactions peuvent, selon les circonstances, avoir des effets différents. En outre, le résultat final peut ne pas refléter seulement les réponses à la niche, mais représenter les effets d'autres processus, comme, par exemple, les réponses immunitaires de l'hôte.

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confidence: 81%

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Competition, contacts, and other factors restricting niches of parasitic helminths

Holmes

1990

Ann. Parasitol. Hum. Comp.

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“…Laboratory experiments on several species of acanthocephalans have shown they can survive in a predator host between 7 and 84 days (Hnath 1969, Uglem and Beck 1972, Lassiere and Crompton 1988, Kennedy 1999). In our experiments, the specimens of Acanthocephalus tumescens survived for four weeks, increasing in length, and females reached full sexual maturity after infection in rainbow trout.…”

Section: Discussionmentioning

confidence: 99%

Post-cyclic transmission in Acanthocephalus tumescens (Acanthocephala: Echinorhynchidae)

Rauque¹,

Semenas²,

Viozzi³

2002

FOLIA PARASIT

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Abstract. The aim of this study was to investigate the post-cyclic transmission of Acanthocephalus tumescens (von Linstow, 1896) from Galaxias maculatus Jenyns to Oncorhynchus mykiss (Walbaum). Wild G. maculatus naturally infected with A. tumescens were fed to cultured rainbow trout, which were sacrificed at the second, third and fourth weeks post infection. Normally attached male and female acanthocephalans were recovered alive from the intestine of rainbow trout. Parasites survive at least four weeks post infection, growing and attaining full sexual maturity. Prevalence and mean intensity generally decreased after infection. A. tumescens is the eighth acanthocephalan species in which post-cyclic transmission has been proven.

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“…Even though the amount of research has increased over the last twenty years, very little deals with the coexistence of congeneric species in the same host population (Uglem and Beck, 1972;Ken nedy and Moriarty, 1987).…”

Section: Introductionmentioning

confidence: 99%

Comparative population biology of fish digenes : the case of threeHelicometra(Trematoda : Opecoelidae) mesoparasites of marine teleosts in a Mediterranean lagoon

Reversat¹,

Silan²

1993

Ann. Parasitol. Hum. Comp.

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Habitat Specificity and Correlated Aminopeptidase Activity in the Acanthocephalans Neoechinorhynchus cristatus and N. crassus

Cited by 39 publications

References 0 publications

Competition, contacts, and other factors restricting niches of parasitic helminths

Competition, contacts, and other factors restricting niches of parasitic helminths

Post-cyclic transmission in Acanthocephalus tumescens (Acanthocephala: Echinorhynchidae)

Comparative population biology of fish digenes : the case of threeHelicometra(Trematoda : Opecoelidae) mesoparasites of marine teleosts in a Mediterranean lagoon

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