Causes of tail fan necrosis in the southern rock lobster,<i>Jasus edwardsii</i>

Musgrove, Richard; Geddes, Mike; Thomas, Connor

doi:10.1080/00288330.2005.9517309

Cited by 15 publications

(24 citation statements)

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“…Natural degradation ( W ) of the cuticle can instigate shell disease and was considered a prerequisite for development of experimental infections under the assumption that W is necessary before shell disease can breach epicuticular defenses (Malloy 1978). Wear has also been implicated in the onset of shell disease in blue crabs Callinectes sapidus (Noga et al 1994) and tail fan necrosis in southern rock lobsters Jasus edwardsii (Musgrove et al 2005).…”

Section: Support For the Host Susceptibility Hypothesismentioning

confidence: 99%

Host Susceptibility Hypothesis for Shell Disease in American Lobsters

Tlusty

Smolowitz

Halvorson

et al. 2007

Journal of Aquatic Animal Health

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Abstract.-Epizootic shell disease (ESD) in American lobsters Homarus americanus is the bacterial degradation of the carapace resulting in extensive irregular, deep erosions. The disease is having a major impact on the health and mortality of some American lobster populations, and its effects are being transferred to the economics of the fishery. While the onset and progression of ESD in American lobsters is undoubtedly multifactorial, there is little understanding of the direct causality of this disease. The host susceptibility hypothesis developed here states that although numerous environmental and pathological factors may vary around a lobster, it is eventually the lobster's internal state that is permissive to or shields it from the final onset of the diseased state. To support the host susceptibility hypothesis, we conceptualized a model of shell disease onset and severity to allow further research on shell disease to progress from a structured model. The model states that shell disease onset will occur when the net cuticle degradation (bacterial degradation, decrease of host immune response to bacteria, natural wear, and resorption) is greater than the net deposition (growth, maintenance, and inflammatory response) of the shell. Furthermore, lesion severity depends on the extent to which cuticle degradation exceeds deposition. This model is consistent with natural observations of shell disease in American lobster.

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Section: Support For the Host Susceptibility Hypothesismentioning

confidence: 99%

Host Susceptibility Hypothesis for Shell Disease in American Lobsters

Tlusty

Smolowitz

Halvorson

et al. 2007

Journal of Aquatic Animal Health

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“…Tail fan necrosis (TFN) is a commonly reported form of classical shell disease found in both wild and captive holding populations of several species of spiny lobsters. TFN in spiny lobsters is most typically characterized by the erosion and blackening of the uropods and telsons that make up the tail fan (Freeman & Macdiarmid, ; Musgrove, Geddes, & Thomas, ; Shields, ). TFN is reported to compromise the overall health and immune status of spiny lobsters (Musgrove et al., ; Vogan et al., ; Zha, Lewis et al., ).…”

Section: Introductionmentioning

confidence: 99%

Potential virulence factors of bacteria associated with tail fan necrosis in the spiny lobster, Jasus edwardsii

Zha

Jeffs

Dong

et al. 2018

Journal of Fish Diseases

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Tail fan necrosis (TFN) is a common condition found in commercially exploited spiny lobsters that greatly diminishes their commercial value. Bacteria possessing proteolytic, chitinolytic and lipolytic capabilities were associated with TFN in spiny lobsters, Jasus edwardsii. In this study, 69 bacterial isolates exhibiting all the three enzymatic capabilities from the haemolymph and tail fans of J. edwardsii with and without TFN were further characterized and compared, including morphology, biofilm formation, antimicrobial activity, antimicrobial resistance, and production of siderophores, melanin and ammonia. The genomic patterns of the most common Vibrio crassostreae isolates were also compared between TFN-affected and unaffected lobsters. Biofilm formation was stronger in bacterial isolates from both haemolymph and tail fans of TFN-affected lobsters compared to those from the unaffected lobsters, while melanin production and siderophore production were stronger in the isolates from tail fans of lobsters with TFN. By contrast, the other characteristics of isolates were similar in lobsters with and without TFN. The Vib. crassostreae isolates from the affected lobsters had similar genomic patterns. Overall, the results indicate that in addition to proteolytic, chitinolytic and lipolytic activities, the bacteria associated with TFN commonly have enhanced activity of important virulence factors, including biofilm formation, melanin production and siderophore production.

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“…During these captive periods, shell disease is unlikely to be a major consequence to the overall health status of such shellfish. However, in the case of tail fan necrosis (an unusual form of shell disease) in the southern rock lobster, Janus edwardsii , such live holding of these animals prior to market is severely hampered by this condition (Musgrove et al ., 2005). Whether shell disease is a cause or significant contributory factor in the reported declines in catches of lobsters off the New England coast or in edible crab fishery in parts of the UK is largely unknown.…”

Section: Introductionmentioning

confidence: 99%

Shell disease in crustaceans – just chitin recycling gone wrong?

Vogan

Powell

Rowley

2008

Environmental Microbiology

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SummaryThe exoskeletons of aquatic crustaceans and other arthropods contain chitin, a biopolymer of b-(1,4)-linked N-acetylglucosamine together with associated proteins. Despite the vast amounts of chitin within such animals little is found in sediments and open water because microorganisms rapidly degrade this following its loss after moulting or upon the animals' death. Shell disease syndrome is a worldwide disease condition that affects a wide range of crustaceans. It comes about as a result of bacterial degradation of the exoskeleton leading to unsightly lesions and even death if the underlying tissues become infected. There are at least two potential forms of the disease; one that appears to centre around chitin degradation and an additional form termed 'epizootic' shell disease, in which chitin degradation is of less significance. This account reviews our current understanding of the causative agents of this syndrome, assesses the potential economic consequences of the disease, and critically examines whether it is associated with anthropogenic disturbances including pollution. Overall, despite extensive studies during the last few decades, the potential links between faecal, heavy metal and insecticide pollution and shell disease are still unclear.

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Causes of tail fan necrosis in the southern rock lobster,Jasus edwardsii

Cited by 15 publications

References 1 publication

Host Susceptibility Hypothesis for Shell Disease in American Lobsters

Host Susceptibility Hypothesis for Shell Disease in American Lobsters

Potential virulence factors of bacteria associated with tail fan necrosis in the spiny lobster, Jasus edwardsii

Shell disease in crustaceans – just chitin recycling gone wrong?

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