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The health state of the eel swimbladder as a measure of parasite pressure by Anguillicola crassus
It is argued that the swimbladder degenerative index more closely reflects the parasite pressure than does classic parasite count, and it is shown that severely damaged swimbladders harboured very few living nematodes.
Is the continental life of the European eel Anguilla anguilla affected by the parasitic invader Anguillicoloides crassus?
- F. Lefebvre, G. Fazio, B. Mounaix, A. Crivelli
- Environmental ScienceProceedings of the Royal Society B: Biological…
- 7 March 2013
It is found that the most severely affected eels (with damaged swimbladder) had greater body length and mass than unaffected eels of same age, and the likely importance of host panmixia in generating great inter-individual variability in growth potential and infection risk is highlighted.
Progenesis in digenean trematodes: a taxonomic and synthetic overview of species reproducing in their second intermediate hosts
A synthetic overview and stress on the importance of the metacercarial cyst wall (whether it is present, and if so its thickness) in the evolution and the adoption of a progenetic life-cycle is given.
SILVERING OF FEMALE EELS (ANGUILLA ANGUILLA) IN TWO SUB-POPULATIONS OF THE RHÔNE DELTA.
It is shown that silvering follows different patterns between the two habitats, and influence of population's parameters like sex-ratio, population structure and abundance on silvering process, is discussed.
The Transition from a Phytopathogenic Smut Ancestor to an Anamorphic Biocontrol Agent Deciphered by Comparative Whole-Genome Analysis[W][OPEN]
Interestingly, the biocontrol agent appears to have acquired genes encoding secreted proteins not found in the compared Ustilaginales, including necrosis-inducing-Phytophthora-protein- and Lysin-motif- containing proteins believed to have direct relevance to its lifestyle.
Spatial and temporal variation in Anguillicola crassus counts: results of a 4 year survey of eels in Mediterranean lagoons.
- F. Lefebvre, P. Contournet, F. Priour, O. Soulas, A. Crivelli
- Environmental ScienceDiseases of aquatic organisms
- 29 July 2002
A decrease in the proportion of infected individuals among elver eels is observed, and this result is discussed in relation to the possible mortality of heavily infected individuals and/or a change in the eels' alimentary diet.
On the origin of Anguillicoloides crassus, the invasive nematode of anguillid eels
The need is identified for a possible resolution of the question of the native origin of this and other parasitic invaders in provenance of East Asia, which includes a deeper sampling effort in the Indo-Pacific zone and the further development of molecular phylogeographic studies of all five anguillicolid species and their hosts.
Impacts of the swimbladder nematode Anguillicola crassus on Anguilla anguilla: variations in liver and spleen masses
There was still an increase in spleen size in relation to the severity of the swimbladder damage, which suggests a hyper-synthesis of splenic immune cells (lymphocytes and macrophages) in reaction to damaged tissues and particularly to larvae in the Swimbladder wall.
Life history constraints on the evolution of abbreviated life cycles in parasitic trematodes.
The lack of obvious differences in body or egg size between trematode species with truncated life cycles and those with the normal three-host cycle indicates that basic life history characteristics are not acting as constraints on the evolution of progenesis; trematodes of all sizes can do it.
Anguillicolosis in the short‐finned eel Anguilla australis: Epidemiology and pathogenicity
It was concluded that the New Zealand short‐finned eels do not greatly suffer from this infection and the damage caused by the parasite to the swimbladder was minimal, even in large silver eels about to undertake a long journey at great depth to reach their spawning grounds in the Pacific.