Description of the larval stages of<i>Anguillicola crassus</i>(Nematoda, Dracunculoidea) using light and scanning electron microscopy

Blanc, Guillailme; Bonneau, Stéphane; Biagianti, S.; Petter, A. J.

doi:10.1051/alr:1992029

Cited by 17 publications

(16 citation statements)

References 3 publications

(3 reference statements)

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“…The data sets of the recovery rate, the percentage of different developmental stages, the percentage of dead Anguillicola crassus and the mean wet weight of the adult worms obtained for the different groups (Table l ) were analysed using the H-test (Kruskal-Wallis) and/or the U-test (MannWhitney) for significant differences (p S 0.05). 1.5 mm were counted as L,, in accordance with the results of Blanc et al (1992). After T~m e [days p.i.1…”

Section: Introductionmentioning

confidence: 86%

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Impact of low water temperature on the development of Anguillicola crassus in the final host Anguilla anguilla

Knopf¹,

Würtz²,

Sures³

et al. 1998

Dis. Aquat. Org.

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ABSTRACT. The effect of low water temperatures on the development and viability of larval and adult Ang~lillicola crassus (Nematoda) in the final host Anguilla ang~lilla was studied. European eels were experimentally infected with A. crassirs and then maintained for 4 mo at 4,9, 10 and 19°C. Larval development showed a temperature-dependent pattern and was significantly retarded at low temperatures. Third-stage larvae survived a 4 mo period at 4'C without belng affected, although they were not able to invade the swimbladder wall at this temperature. In contrast, adult worms were severely harmed during a 4 mo period at 4'C, as reflected by increased mortality and decreased growth and reproductivity compared to the worms maintained for Lhe same period at 18°C. Starvation of the eels for 4 mo at 19°C dld not affect the development and growth of the nematode The experimentally obtained results support the hypothesis that the spread of A . crasslrs in boreal regions, e.g. Northern Europe, I S restricted by the natural ambient temperature regimes.

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Section: Introductionmentioning

confidence: 86%

“…As L, and L, cannot be distinguished from each other perfectly by means of light microscopy (Blanc et al 1992), all larvae with a body length exceeding female was then calculated. Nematodes showing no reaction to mechanical stimulation were considered dead and grouped with the decomposed specimens.…”

Section: Introductionmentioning

confidence: 99%

Impact of low water temperature on the development of Anguillicola crassus in the final host Anguilla anguilla

Knopf¹,

Würtz²,

Sures³

et al. 1998

Dis. Aquat. Org.

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“…The walls of the swimbladders were checked for larval stages (L 3 and L 4 ) by squash preparation using 2 Perspex plates. In accordance with the results of Blanc et al (1992), all larvae with a body length >1.5 mm were considered Stage L 4 larvae. The prevalence, mean intensity and abundance of the parasites in the eels were calculated as described by Bush et al (1997).…”

Section: Methodsmentioning

confidence: 97%

Occurrence of Anguillicola crassus (Nematoda: Dracunculoidea) in Japanese eels Anguilla japonica from a river and an aquaculture unit in SW Taiwan

Münderle¹,

Taraschewski²,

Klar³

et al. 2006

Dis. Aquat. Org.

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The infection by swimbladder nematodes of the genus Anguillicola (Dracunculoidea: Anguillicolidae) was examined in 2 populations of the Japanese eel Anguilla japonica in SW Taiwan. Wild eels from the Kao-Ping river were compared with cultured eels from an adjacent aquaculture unit. Only the cosmopolitan species Anguillicola crassus was present. Among wild eels, prevalence of infection varied between 21 and 62%, and mean intensity between 1.7 and 2.7 for adult worms. Similar intensity values (1.3 to 2.8) were recorded for the larvae. In cultured eels, prevalence as well as mean intensities were higher. In the cultured hosts, mean larval intensities exceeded those of adult worms 2-fold, and maximum larval intensities were 4-to 5-fold higher than in eels from the river. In cultured eels, dead larvae were also more abundant than in wild eels. We conclude that infrapopulations of A. crassus in Japanese eels are regulated by the defense system of this host, intraspecific density-dependent regulation being less likely as the major regulatory mechanism. No influence of the parasite on eel condition was found in either wild or cultured eels, indicating a low or moderate pathogenic effect of A. crassus on this host. This study shows that A. crassus is moderately common in cultured and wild Japanese eels in Taiwan, where the parasite is endemic.

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“…Kuwahara and Niimi 1974, Moravec and Taraschewski 1988, Blanc et al 1992, Moravec et al 1993, Moravec 1994, Rolbiecki 2004), possibly indicating a wider range of morphological variability than previously thought. Additionally, researches usually report of nematode dimensions on a small sample of A. crassus individuals.…”

Section: Discussionmentioning

confidence: 89%

New data on the biology of the introduced exotic nematode Anguillicola crassus Kuwahara, Niimi et Itagaki, 1974 in the eel Anguilla anguilla in Lake Wdzydze (Polish waters)

Rolbiecki

2008

Oceanological and Hydrobiological Studies

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Anguillicola crassus Kuwahara, Niimi et Itagaki, 1974 is an Asian parasitic nematode that was introduced to Europe and inhabits the swim bladder of eels. In the 2002-2005 period, 237 eels, Anguilla anguilla (Linnaeus, 1758), from Lake Wdzydze were examined for the occurrence of the nematode. 79.3% of the fish were infected, at a mean intensity of 7.2 nematodes per fish. Morphological measurements of the observed A. crassus are presented. This is the first published report of A. crassus in eels from Lake Wdzydze.

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Description of the larval stages ofAnguillicola crassus(Nematoda, Dracunculoidea) using light and scanning electron microscopy

Cited by 17 publications

References 3 publications

Impact of low water temperature on the development of Anguillicola crassus in the final host Anguilla anguilla

Impact of low water temperature on the development of Anguillicola crassus in the final host Anguilla anguilla

Occurrence of Anguillicola crassus (Nematoda: Dracunculoidea) in Japanese eels Anguilla japonica from a river and an aquaculture unit in SW Taiwan

New data on the biology of the introduced exotic nematode Anguillicola crassus Kuwahara, Niimi et Itagaki, 1974 in the eel Anguilla anguilla in Lake Wdzydze (Polish waters)

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