Ichthyobodo hippoglossi n. sp. (Kinetoplastea: Prokinetoplastida: Ichthyobodonidae fam. nov.), an ectoparasitic flagellate infecting farmed Atlantic halibut Hippoglossus hippoglossus

Isaksen, Trond Einar; Karlsbakk, Egil; Nylund, Are

doi:10.3354/dao073207

Cited by 12 publications

(35 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ichthyobodo spp. are reported from salmonids, cod and halibut (Isaksen et al, 2007;Karlsbakk et al, 2009; Rintamaki Kinnunen and Valtonen, 1997) and pose a major threat to both wild and farmed fish populations. The parasite is found on the skin of juvenile salmon in freshwater, and if left untreated can lead to mass mortalities (Poppe, 1999;Rintamaki Kinnunen and Valtonen, 1997).…”

Section: Ichthyobodo Sppmentioning

confidence: 99%

Disease interaction and pathogens exchange between wild and farmed fish populations with special reference to Norway

Johansen¹,

Jensen²,

Mikkelsen³

et al. 2011

Aquaculture

163

121

View full text Add to dashboard Cite

Section: Ichthyobodo Sppmentioning

confidence: 99%

Disease interaction and pathogens exchange between wild and farmed fish populations with special reference to Norway

Johansen¹,

Jensen²,

Mikkelsen³

et al. 2011

Aquaculture

163

121

View full text Add to dashboard Cite

“…Callahan et al (2005) identified a complex of 9 different species with low host specificity, one of which was capable of infecting both marine and freshwater fish. A species of Ichthyobodo was reported from cod by Isaksen et al (2007). Clearly Ichthyobodo is a potentially serious pathogen in cod mariculture.…”

Section: Protozoamentioning

confidence: 99%

Parasite faunas of farmed cod and adjacent wild cod populations in Norway: a comparison

Heuch¹,

Jansen²,

Hansen³

et al. 2011

Aquacult. Environ. Interact.

View full text Add to dashboard Cite

Atlantic cod Gadus morhua L. is host to more than 120 parasite species. Background abundance of these parasite species on adjacent wild hosts determines the infection pressure on cod farmed in open pens. In 2006In and 2008 cod were collected from 4 locations along the coast of Norway: Øks-fjord, Kvarøy, Brønnøysund and Ålesund. Freshly killed wild local cod, wild migratory cod, hatchery-reared farmed cod and wild-caught farmed cod were given a complete autopsy according to a standardized protocol. A total of 343 cod were examined, from which 48 parasite taxa, including 37 named species, were recorded. Wild local cod had the most diverse parasite fauna. Wild-caught farmed cod had a more diverse parasite fauna than the wild migratory cod, and the latter had 2 more parasite taxa than the hatchery-reared cod. The most common parasites in hatchery-reared cod were the digenean Cryptocotyle lingua, the monogenean Gyrodactylus marinus and the protozoans Spironucleus torosa and Trichodina spp. Other parasites occurring frequently in hatchery-reared cod were the parasitic copepod Cresseyus confusus, the myxosporean Zschokkella hildae and the nematode Hystero thy lacium aduncum. The nematode and digenean fauna of the hatchery-reared fish was sparse compared to wild cod and the wild-caught farmed cod. Caligid copepods were very rare on the hatchery-reared cod. These results support the hypothesis that food-borne parasites, such as nematodes and mature stages of digeneans, are most unlikely to become a health problem for farmed cod, and that parasites with simple life cycles and pelagic transmission stages, such as monogeneans and trichodinids, may dominate the parasite fauna of farmed cod in the future

show abstract

“…This hampers the acquisition of epizootiological information about the actual Ichthyobodo species involved. Farmed Atlantic salmon in Norway may be infected with I. necator s.s. (Isaksen et al 2007) and Ichthyobodo sp. II sensu Todal et al (2004).…”

Section: Discussionmentioning

confidence: 98%

“…comprises several Ichthyobodo spp. that may be discerned by their small subunit ribosomal DNA (SSU rDNA) sequences (Todal et al 2004, Callahan et al 2005, Isaksen et al 2007). In a previous study, we delimited I. necator (sensu stricto, s.s.) as a parasite thus far only known to infect freshwater fishes in Europe (Isaksen et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The sequence data were assembled with the help of NTI Vector software (InforMax), and GenBank searches were done with BLAST (2.0). The Vector NTI Suite software package was used for multiple alignments of the sequences.Two different Ichthyobodo species are known to infect salmonids in freshwater in Europe; I. necator s.s. (see Isaksen et al 2007) and Ichthyobodo sp. II sensu Todal et al (2004).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Patterns of Ichthyobodo necator sensu stricto infections on hatchery-reared Atlantic salmon Salmo salar in Norway

Isaksen¹,

Karlsbakk²,

Sundnes³

et al. 2010

Dis. Aquat. Org.

Self Cite

View full text Add to dashboard Cite

Infection patterns with ectoparasitic flagellates belonging to the genus Ichthyobodo were studied in an Atlantic salmon Salmo salar (L.) hatchery in western Norway during an 11 mo period, from eyed eggs to smoltification. Since the earlier species designation Ichthyobodo necator (sensu lato, s.l.) has been shown to represent a complex of several species, the epizootiology of different Ichthyobodo spp. is poorly known. Therefore, we employed molecular methods to ascertain the specific identity of the parasites detected in our study. Only I. necator in the recently redefined and restricted sense occurred (I. necator sensu stricto, s.s.). We observed a 2-peak pattern of infection; the first peak occurred among fry in March and the second peak among fingerlings and pre-smolt in August and September. Skin lesions observed on fingerlings and pre-smolt were significantly associated with Ichthyobodo infections. Also, these infections were negatively correlated with both haematocrit values (Hct) and the condition factor (K) of the fish. The patterns of infection on the farmed salmon suggest that I. necator s.s. is an opportunistic parasite of salmon, flourishing in periods when susceptible hosts are present and the environment favours parasite proliferation. Our study is the first to detect and identify I. necator s.s. on wild-caught adult salmonids (brown trout S. trutta L.). Wild salmonids and sticklebacks Gasterosteus aculeatus (L.) caught in the lakes serving as a water supply to the hatchery were found infected with I. necator s.s., hence these are the likely sources of parasites entering the hatchery via the inlet water.KEY WORDS: Ichthyobodo necator · Salmon · Ichthyobodonidae · Fresh water · Epizootiology · SSU rDNA · Parasite · Ichthyobodosis Resale or republication not permitted without written consent of the publisherDis Aquat Org 88: [207][208][209][210][211][212][213][214] 2010 voirs of parasites, infecting hatchery-reared salmonids via the inlet water. Parasite interactions between wild and farmed salmonids have been studied (Wootten & Smith 1980, Valtonen & Koskivaara 1994, but there are no descriptions or detection of Ichthyobodo spp. from wild fish in these studies.The purpose of the present study was to examine the acquisition and progress of Ichthyobodo spp. infections on hatchery-reared juvenile salmon through a production cycle in Norway, identify the Ichthyobodo species involved and disclose natural hosts in the water source. MATERIALS AND METHODSJuvenile Atlantic salmon Salmo salar from a single cohort were sampled from a hatchery in western Norway (60°11' 24'' N, 5°45' 50'' E). The hatchery receives water from a lake connected to a larger lake through a short channel. Anadromous salmonids are prevented from entering these lakes by a dam. Brown trout Salmo trutta (L.), Arctic charr Salvelinus alpinus (L.), threespined stickleback Gasterosteus aculeatus (L.), and eel Anguilla anguilla (L.) are native to the lakes, but Atlantic salmon and rainbow trout Oncorhynchus mykiss Walbaum escaped...

show abstract

Ichthyobodo hippoglossi n. sp. (Kinetoplastea: Prokinetoplastida: Ichthyobodonidae fam. nov.), an ectoparasitic flagellate infecting farmed Atlantic halibut Hippoglossus hippoglossus

Cited by 12 publications

References 17 publications

Disease interaction and pathogens exchange between wild and farmed fish populations with special reference to Norway

Disease interaction and pathogens exchange between wild and farmed fish populations with special reference to Norway

Parasite faunas of farmed cod and adjacent wild cod populations in Norway: a comparison

Patterns of Ichthyobodo necator sensu stricto infections on hatchery-reared Atlantic salmon Salmo salar in Norway

Contact Info

Product

Resources

About