GYRODACTYLUS ELEGANS PDF

SpeciesGyrodactylus elegans · ADW Pocket Guides on the iOS App Store! The Animal Diversity Web team is excited to announce ADW Pocket Guides!. Go to Print Version. Gyrodactylus elegans. Taxonomic Serial No.: ( Download Help) Gyrodactylus elegans TSN Gyrodactylus species are ubiquitous monogenean parasites of teleosts with over .. Specifically, the cointroduction of Gyrodactylus elegans, G. gurleyi.

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They are ubiquitous teleost ectoparasites that have been extensively studied since the late 19th Century, largely due their unique reproductive adaptations.

Ggrodactylus are the only parasitic worms that reproduce in situ on their host and lack a specific transmission stage, therefore they bridge the classical divide between micro- bacteria, viruses etc and macroparasites worms etc.

These viviparous parasites already contain a fully grown embryo the F1 in utero when born and as the parent ages, development of a third generation embryo the F2 is visible within the F1 see Fig.

Many gyrodactylids exhibit distinct site preferences on the host, but may display characteristic migrations on the host during their life cycle. Gyrodactylids are small With increasing aquacultural practices, the threat posed by gyrodactylids is ever more apparent, particularly since the havoc created by the G.

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Apart from the gyrodxctylus costs to fish farming, this parasite endangers wild salmon stocks and is a significant conservation threat. With its high fecundity and transmission potential, G.

WoRMS – World Register of Marine Species – Gyrodactylus elegans von Nordmann,

Rotenone poisoning of entire elegas systems was used, largely unsuccessfully, for many years, and now control measures involving heavy metal aluminium dosing are being trailed in Norway. This yearmillions of Euros have been spent already on G. In the current global economy, the risk of further introductions of gyrodactylid monogeneans is an indisputable threat. The biology of these pathogens predilects them for introduction Kennedy and elegxns species have been introduced to Europe.

Unfortunately, the impact of such introductions to the ecosystem is currently unpredictable, and factors influencing the pathogenic-potential of Gyrodactylus spp. In addition to the G.

Flegans value of gyrodactylids in epidemiological models has been recognised for many years e. Age-structured population models have been used to assess the impact of disease-induced mortality at different stages of the life-cycle of salmonids Clers Risk assessments have also been conducted to assess the risk posed to UK fisheries by gyrodactylosis Peeler et al.

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Traditionally, gyrodactylid taxonomy was based on morphological characters alone. He subsequentlyestablished species groups within each subgenus based on marginal hook morphology.

Gyrodactylus

However, gyrodactylids are frustratingly similar in appearance and difficulties in species identification are believed to have considerable hampered ecological studies.

More recently, molecular studies e.

Despite their morphological conservatism, it appears that gyrodactylids display a range of different behavioural traits associated with the diverse ecology of their teleost hosts e. We feel the practical advantages of working with these model systems for studying host-parasite interactions are unsurpassed.

With increased knowledge accumulating from both laboratory and field studies, we can begin to take a holistic approach to gyrodactylid systematics by analysing morphological, molecular, ecological and biogeographical trends.

Overview of the genus Gyrodactylus Gyrodactylus is a hyperdiverse monogenean genus with ca.