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Full-Text Articles in Life Sciences
Host Behavior Alters Spiny Lobster-Viral Disease Dynamics: A Simulation Study, Tw Dolan, Mj Butler, Jeffrey D. Shields
Host Behavior Alters Spiny Lobster-Viral Disease Dynamics: A Simulation Study, Tw Dolan, Mj Butler, Jeffrey D. Shields
VIMS Articles
Social behavior confers numerous benefits to animals but also risks, among them an increase in the spread of pathogenic diseases. We examined the trade-off between risk of predation and disease transmission under different scenarios of host spatial structure and disease avoidance behavior using a spatially explicit, individual-based model of the host pathogen interaction between juvenile Caribbean spiny lobster (Panulirus argus) and Panulirus argus Virus 1 (PaV1). Spiny lobsters are normally social but modify their behavior to avoid diseased conspecifics, a potentially effective means of reducing transmission but one rarely observed in the wild. We found that without lobster avoidance of …
Bonamia Exitiosa Transmission Among, And Incidence In, Asian Oyster Crassostrea Ariakensis Under Warm Euhaline Conditions, Corinne Audemard, Ryan B. Carnegie, Km Hill, Ch Peterson, Em Burreson
Bonamia Exitiosa Transmission Among, And Incidence In, Asian Oyster Crassostrea Ariakensis Under Warm Euhaline Conditions, Corinne Audemard, Ryan B. Carnegie, Km Hill, Ch Peterson, Em Burreson
VIMS Articles
Previously reported in Australia, New Zealand, and more recently in Europe, the protistan parasite Bonamia exitiosa was also reported in the mid-Atlantic region of the USA after causing serious mortalities there in the Asian oyster Crassostrea ariakensis. At the time, this oyster was being considered for introduction, and the potential consequences of introducing this species were being assessed using field and laboratory studies. B. exitiosa emerged as the most serious disease threat for this oyster species, especially under warm euhaline conditions and for oystersariakensis, we investigated B. exitiosa transmission and incidence in C. ariakensis. During a first trial, potential direct …
Ameson Metacarcini Sp Nov (Microsporidia) Infecting The Muscles Of Dungeness Crabs Metacarcinus Magister From British Columbia, Canada, Hamish J. Small, Gr Meyer, Gd Stentiford, Js Dunham, K Bateman, Jeffrey D. Shields
Ameson Metacarcini Sp Nov (Microsporidia) Infecting The Muscles Of Dungeness Crabs Metacarcinus Magister From British Columbia, Canada, Hamish J. Small, Gr Meyer, Gd Stentiford, Js Dunham, K Bateman, Jeffrey D. Shields
VIMS Articles
The Dungeness crab Metacarcinus magister supports a large and valuable fishery along the west coast of North America. Since 1998, Dungeness crabs exhibiting pink- to orange-colored joints and opaque white musculature have been sporadically observed in low prevalence from the Fraser River delta of British Columbia, Canada. We provide histological, ultrastructural, and molecular evidence that this condition is caused by a new microsporidian parasite. Crabs displaying gross symptoms were confirmed to have heavy infections of ovoid-shaped microsporidian spores (similar to 1.8 x 1.4 mu m in size) within muscle bundles of the skeletal musculature. The parasite apparently infected the outer …
Ultrastructural Comparison Of Bonamia Spp. (Haplosporidia) Infecting Ostreid Oysters, Pm Hine, Rb Carnegie, Ma Kroeck, A Villalba, My Engelsma, Em Burreson
Ultrastructural Comparison Of Bonamia Spp. (Haplosporidia) Infecting Ostreid Oysters, Pm Hine, Rb Carnegie, Ma Kroeck, A Villalba, My Engelsma, Em Burreson
VIMS Articles
The ultrastructure of Bonamia from Ostrea angasi from Australia, Crassostrea ariakensis from the USA, O. puelchana from Argentina and O. edulis from Spain was compared with described Bonamia spp. All appear conspecific with B. exitiosa. The Bonamia sp. from Chile had similarities to the type B. exitiosa from New Zealand (NZ), but less so than the other forms recognized as B. exitiosa. Two groups of ultrastructural features were identified; those associated with metabolism (mitochondrial profiles, lipid droplets and endoplasmic reticulum), and those associated with haplosporogenesis (Golgi, indentations in the nuclear surface, the putative trans-Golgi network, perinuclear granular material and haplosporosome-like …
Microcell Parasites Of Molluscs: Introduction To Dao Special 7, Rb Carnegie, My Engelsma
Microcell Parasites Of Molluscs: Introduction To Dao Special 7, Rb Carnegie, My Engelsma
VIMS Articles
First discovered decades ago, microcell protistan parasites of the genera Bonamia and Mikrocytos remain relevant today for their economic impacts on growing molluscan aquaculture industries and fisheries. Bonamia parasites have received more attention over the years in part because they are more widespread and thus of wider concern, but there has been renewed interest in Mikrocytos recently with the generation of important new findings. Among these has been the surprising observation that Mikrocytos has phylogenetic affinities to the Rhizaria, which includes the haplosporidian protists and the genus Bonamia. This Diseases of Aquatic Organisms Special, emerging from the 5th Meeting of …
Phylogenetics Of Bonamia Parasites Based On Small Subunit And Internal Transcribed Spacer Region Ribosomal Dna Sequence Data, Km Hill, Na Stokes, Sc Webb, Pm Hine, Ma Kroeck, Jd Moore, Ms Morely, Kimberly S. Reece, Eugene M. Burreson, Ryan Carnegie
Phylogenetics Of Bonamia Parasites Based On Small Subunit And Internal Transcribed Spacer Region Ribosomal Dna Sequence Data, Km Hill, Na Stokes, Sc Webb, Pm Hine, Ma Kroeck, Jd Moore, Ms Morely, Kimberly S. Reece, Eugene M. Burreson, Ryan Carnegie
VIMS Articles
The genus Bonamia (Haplosporidia) includes economically significant oyster parasites. Described species were thought to have fairly circumscribed host and geographic ranges: B. ostreae infecting Ostrea edulis in Europe and North America, B. exitiosa infecting O. chilensis in New Zealand, and B. roughleyi infecting Saccostrea glomerata in Australia. The discovery of B. exitiosa-like parasites in new locations and the observation of a novel species, B. perspora, in non-commercial O. stentina altered this perception and prompted our wider evaluation of the global diversity of Bonamia parasites. Samples of 13 oyster species from 21 locations were screened for Bonamia spp. by PCR, and …
Longitudinal Study Of Winter Mortality Disease In Sydney Rock Oysters Saccostrea Glomerata, Zb Spiers, M Gabor, Sa Fell, Rb Carnegie, M Dove, Et Al.
Longitudinal Study Of Winter Mortality Disease In Sydney Rock Oysters Saccostrea Glomerata, Zb Spiers, M Gabor, Sa Fell, Rb Carnegie, M Dove, Et Al.
VIMS Articles
Winter mortality (WM) is a poorly studied disease affecting Sydney rock oysters Saccostrea glomerata in estuaries in New South Wales, Australia, where it can cause significant losses. WM is more severe in oysters cultured deeper in the water column and appears linked to higher salinities. Current dogma is that WM is caused by the microcell parasite Bonamia roughleyi, but evidence linking clinical signs and histopathology to molecular data identifying bonamiasis is lacking. We conducted a longitudinal study between February and November 2010 in 2 estuaries where WM has occurred (Georges and Shoalhaven Rivers). Results from molecular testing of experimental oysters …
Bonamia Parasites: A Rapidly Changing Perspective On A Genus Of Important Mollusc Pathogens, My Engelsma, Sc Culloty, Sa Lynch, I Arzul, Rb Carnegie
Bonamia Parasites: A Rapidly Changing Perspective On A Genus Of Important Mollusc Pathogens, My Engelsma, Sc Culloty, Sa Lynch, I Arzul, Rb Carnegie
VIMS Articles
Organisms of the genus Bonamia are intracellular protistan parasites of oysters. To date, 4 species have been described (B. ostreae, B. exitiosa, B. perspora and B. roughleyi), although the status of B. roughleyi is controversial. Introduction especially of B. ostreae and B. exitiosa to naive host populations has been shown to cause mass mortalities in the past and has had a dramatic impact on oyster production. Both B. ostreae and B. exitiosa are pathogens notifiable to the World Organisation for Animal Health (OIE) and the European Union. Effective management of the disease caused by these pathogens is complicated by the …