Search results for "Host switch"

A niche perspective on the range expansion of symbionts.

2020

Range expansion results from complex eco-evolutionary processes where range dynamics and niche shifts interact in a novel physical space and/or environment, with scale playing a major role. Obligate symbionts (i.e. organisms permanently living on hosts) differ from free-living organisms in that they depend on strong biotic interactions with their hosts which alter their niche and spatial dynamics. A symbiotic lifestyle modifies organism–environment relationships across levels of organisation, from individuals to geographical ranges. These changes influence how symbionts experience colonisation and, by extension, range expansion. Here, we investigate the potential implications of a symbiotic…

Experimental investigation of a hantavirus host-switch between arvicoline rodents Lemmus lemmus and Myodes glareolus

2014

Data from: Getting there and around: host range oscillations during colonisation of the Canary Islands by the parasitic nematode Spauligodon

2017

Episodes of expansion and isolation in geographic range over space and time, during which parasites have the opportunity to expand their host range, are linked to the development of host-parasite mosaic assemblages and parasite diversification. In this study we investigated whether island colonisation events lead to host range oscillations in a taxon of host-specific parasitic nematodes of the genus Spauligodon in the Canary Islands. We further investigated if range oscillations also resulted in shifts in host breadth (i.e. specialization), as expected for parasites on islands. Parasite phylogeny and divergence time estimates were inferred from molecular data with Bayesian methods. Host div…

Transmission and host and mate location in the fish louse Argulus coregoni and its link with bacterial disease in fish

2007

FM Matthias Bandilla osoittaa väitöstutkimuksessaan, että kirjolohen kalatäitartunnalla on selkeä yhteys Flavobacterium columnare -infektioon, joka on yksi ongelmallisimmista bakteeritaudeista suomalaisessa kalanviljelyssä tällä hetkellä. Vaikka heikko kalatäitartunta ei aiheuta kalan kuolemaa, yhdessä bakteerialtistuksen kanssa se voi olla tappava. Vastaavien vuorovaikutusten ymmärtäminen olisi tärkeää vesiviljelyn kannalta, koska erilaisten mikrobien aiheuttamien tautien ja loisten yhteisesiintyminen kalanviljelylaitoksella on ennemminkin sääntö kuin poikkeus.Kalatäi (Argulus coregoni) on pääasiassa lohikaloilla esiintyvä äyriäispintaloinen, jonka levinneisyys ulottuu koko pohjoiselle vyö…