Anguillicola crassus larvae in cormorant's prey fish in Vistula Lagoon, Poland

Własow, T.; Gomułka, Piotr; Martyniak, Andrzej; Boroń, Sławomir; Hliwa, Piotr; Terlecki, J.; Szymańska, Urszula

doi:10.1051/kmae:1998047

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…Field studies showed that A. crassus occurs in eels living in brackish water in the Baltic Sea (Höglund, Andersson & Härdig 1992), in estuaries (Pilcher & Moore 1993) and saline lagoons (Kennedy, Di Cave, Berrilli & Orecchia 1997). Piscivorous birds, such as cormorants, may also have a role in extending the distribution of A. crassus through fish regurgitation (Wlasow, Gomulka, Martyniak, Boron, Hliwa, Terlecki & Szymanska 1998). The only known limitations to dissemination appear to be availability of intermediate hosts (Kirk et al.…”

Section: Origin and Dissemination Of Anguillicola Crassusmentioning

confidence: 99%

The impact of Anguillicola crassus on European eels

Kirk

2003

Fisheries Management Eco

235

286

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The impact of the parasitic swimbladder nematode, Anguillicola crassus Kuwahara, Niimi & Itagaki, on European eel populations is assessed with reference to published research on its origin and rapid dissemination, life cycle and transmission dynamics, and its pathogenic effect. The parasite was originally endemic to East Asia, but has transferred from its native host, the Japanese eel, Anguilla japonica Temminck & Schlegel, to the European eel, Anguilla anguilla (L.) and American eel, Anguilla rostrata (Le Seur). Anguillicola crassus is a very successful colonizer and is now known to occur in four continents (Asia, Europe, Africa and America). The nematode can severely impair swimbladder function and has caused mortalities in both farmed and wild populations in the presence of other stressors. Anguillicola crassus may impair the capacity of European eels to complete the spawning migration, although direct evidence is not available to support this hypothesis. Areas for future research are recommended.K E Y W O R D S : Anguillicola crassus, eels parasite, nematode, pathology, swimbladder.

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Section: Origin and Dissemination Of Anguillicola Crassusmentioning

confidence: 99%

The impact of Anguillicola crassus on European eels

Kirk

2003

Fisheries Management Eco

235

286

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“…In Europe, the rapid dissemination of the parasite has been attributed to the introduction of eels into watersheds for stocking and human consumption, the natural movements of the eels, and regurgitation by piscivorous birds, like cormorants (Wlasow et al 1998;. Urbanization and introductions through ballast waters and bait buckets may also play a factor in the distribution of the parasite Aieta and Oliveira In Prep).…”

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Rates of swim bladder parasite infection and PIT tag retention in upstream migrant American eels of the upper Potomac River drainage

Zimmerman¹

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This thesis involved two components: identification of the parasite Anguillicola crassus in American eels, Anguilla rostrata and PIT tag retention in eels in a laboratory setting. The recent spread of the swim bladder nematode parasite, Anguillicola crassus, in American eels has caused concern among biologists and fishery managers. A total of 244 yellow-phase American eels were collected at the Millville Dam eel ladder on the Shenandoah River, WV. Swim bladders were removed and examined for the presence of the nematode parasite. The number of parasites in each eel was recorded, and prevalence, intensity, and mean intensity were calculated. A swim bladder degenerative index (SDI) was also used on a subsample of 50 eels to document previous infections and the health state of the swim bladder. Prevalence of the parasite was 2%, and both intensity and mean intensity were 1. Based on the SDI, 38% of the eels showed signs of a previous infection of A. crassus. None of the eels from the Shenandoah River had severely degraded swim bladders, 38% had moderately damaged swim bladders, and 62% had healthy swim bladders. This is the first study that confirms the presence of A. crassus in the Potomac River watershed and the first to document the parasite in West Virginia. For the second part of the thesis, retention rates of passive integrated transponders (PIT tags) were compared among three tagging locations of small (205-370 mm) American eels: the dorsal musculature behind the head, the dorsal musculature near the dorsal fin origin, and the abdominal cavity. Eighteen American eels from the Shenandoah River, WV were PIT tagged in the three locations and tag retention was measured for a total of 9 weeks. Tag retention was highest in the dorsal musculature (100%) and in the abdominal cavity (100%), and lowest behind the head (88%). These results are consistent with previous literature. This research was a pilot study to determine PIT tag placement for a study of upstream migration in American eels. I would like to extend thanks to my graduate committee, especially Dr. Stuart Welsh for his guidance, Dr. Todd Petty, and Dr. Ken Oliveira, for their contributions both to this project and my various learning experiences throughout the past two years. A special thanks to Ken Oliveira for his time in teaching me otolith ageing techniques. I would also like to thank Evelyn Michael for her assistance in the lab, Alison Mynsberge for helping me tinker with the isomet saw, and Ken Sheehan and Dustin Smith for their help in the field. Also, thank you all my professors and Committee members for being so supportive and working with me through my pregnancy, and for all the wonderful opportunities they provided me throughout my time at WVU. Thank you to Becky Nestor for all her assistance and support. A final thanks to my mother-in-law, Patty. Without her many hours of help with Kelvin, I would never have finished my thesis in a timely fashion.

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Assessment of bioinvasion impacts on a regional scale: a comparative approach

et al. 2010

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This paper presents an overall bioinvasion impact assessment on the scale of a large marine region-the Baltic Sea, as defined by the Helsinki Commission. The methodology is based on a classification of the abundance and distribution range of alien species and the magnitude of their impacts on native communities, habitats and ecosystem functioning aggregated in a ''Biopollution Level'' index (BPL) which ranges from 'no impact' (BPL = 0) to 'massive impact' (BPL = 4). The assessment performed for nine Baltic sub-regions revealed that documented ecological impact is only known for 43 alien species out of 119 registered in the Sea. The highest biopollution (BPL = 3, strong impact) occurs in coastal lagoons, inlets and gulfs, and the moderate biopollution (BPL = 2)-in the open sea areas. The methodology was also used to classify species into alien (BPL = 0) versus 'impacting' species (BPL [ 0), which can be divided into 'potentially invasive' (BPL = 1) and 'invasive' (BPL [ 1) ones. No clear correlation between the number of established alien and impacting species was found in the sub-regions of the Baltic Sea. The methodology, although requiring a substantial research effort, proved to be useful for interregional comparisons and evaluating the bioinvasion effects of individual alien species.

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Anguillicola crassus larvae in cormorant's prey fish in Vistula Lagoon, Poland

Abstract: The presence of A. crassus larvae in herring, stickleback, perch, ruffe, pike-perch, Mots-clés : Anguillicola, cormoran, poisson proie, Baie de Vistule.

Cited by 5 publications

References 2 publications

The impact of Anguillicola crassus on European eels

The impact of Anguillicola crassus on European eels

Rates of swim bladder parasite infection and PIT tag retention in upstream migrant American eels of the upper Potomac River drainage

Assessment of bioinvasion impacts on a regional scale: a comparative approach

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