Parasitism and Commensalism in the Turbellaria

Jennings, J. B.

doi:10.1016/s0065-308x(08)60158-x

Cited by 76 publications

(61 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On average, 50% of the D. boschmai migrated successfully to the new exoskeleton of the host crayfish after ecdsysis. Evidence has been presented to show that some species of temnocephalids can survive and breed away from their hosts (Hickman, 1967;Jennings, 1971), and it has been suggested that a brief, free-living stage may compose part of the normal life cycle (Jennings, 1971).…”

Section: Condition: Temnocephalid Infestationsmentioning

confidence: 99%

Synopsis of freshwater crayfish diseases and commensal organisms

et al. 2002

View full text Add to dashboard Cite

Disease agents and pests associated with freshwater crayfish fall into six main categories-viruses, bacteria, rickettsia-like organisms (RLOs), fungi, protists, and metazoans. Data and information on specific disease agents and pests from each of these categories are presented in this synopsis. Each agent or group of agents is considered under the following headings-condition, causative agent(s), life cycle/life history, epizootiology, pathology, pathogen viability. Information for the synopsis was obtained from the published literature and from personal contact with internationally recognized experts in freshwater crayfish aquaculture, biology, and disease. Data of relevance for import risk analysis are summarized.Import risk analysis is the process by which the risks associated with importation of animals and plants, and products derived from animals and plants, are assessed and managed. Hazard identification is essential and is the first component of an import risk analysis. In 1996, the Australian Quarantine and Inspection Service (AQIS) commenced a review of policy relating to the importation of nonviable freshwater crayfish products, along with a suite of other aquatic animal products. AQIS2 commissioned a synopsis of freshwater crayfish pests and pathogens for use as a resource document for hazard identification in the formal IRA process.

show abstract

Section: Condition: Temnocephalid Infestationsmentioning

confidence: 99%

Synopsis of freshwater crayfish diseases and commensal organisms

et al. 2002

View full text Add to dashboard Cite

show abstract

“…T u r b e 11 a r i a n s. Most of the symbiotic turbellarians living together with echinoderms are umagillid rhabdocoels (Jennings, 1971;Cannon, 1982). With very few exceptions, almost all echinoderm-associated turbellarians live either within the digestive tract or within the coelomic cavity of their host.…”

Section: Diseases Caused By Metazoansmentioning

confidence: 99%

“…Intracoelomic umagillids depend directly on their host for nutrition (they ingest coelomic fluid and coelomocytes~ Mettrick & Jennings, 1969}. Gut-associated umagillids were considered classical commensals (Jennings, 1971). However, recent work indicates that they feed on intestinal tissues and are basically parasitic (Shinn, 1981~ Cannon, 1982}. T r e m a t o d e s. About a dozen species of digenic trematodes were reported from echinoderms.…”

Section: Diseases Caused By Metazoansmentioning

confidence: 99%

Diseases of echinoderms

Jangoux

1984

Helgolander Meeresunters

View full text Add to dashboard Cite

Diseases of echinoderms are poorly documented. Most reports concern biotic diseases caused by animal agents. While parasites on echinoderms have been described in increasing numbers of papers for more than one century, the host-parasite relationship and the effects of parasitism on echinoderm life-cycles were rarely considered. The parasitic fauna differs markedly according to the echinoderm group concerned, depending on various factors such as feeding-habits or symbiogenesis. Microorganismic diseases undoubtedly occur in echinoderms but they were not investigated until recently. Microorganisms have frequently been assumed to act as agents causing mass mortalities. As for stress-caused diseases, the only -and very preliminary -data available concern almost exclusively those induced by pollution. Since echinoderms are major components of benthic ecosystems, echinoderm diseases may be expected to exert prominent ecological effects.

show abstract

“…The paraphyletic taxon "Turbellaria" (see Ehlers, 1985) includes mainly free-living species and only few that live in association with other organisms (Jennings, 1971). Most of these associations remain unclear in nature (commensalism, mutualism or parasitism), and mostly involve an echinoderm host (Jangoux, 1990;Jennings, 1997).…”

Section: Introductionmentioning

confidence: 99%