Fróðskaparrit - 01.01.2008, Side 163

SNÍKAR í FØROYSKUM KOMBIKKI, CASTEROSTEUS ACULEATUS L
161
terosteus aculeatus is approximately 150
(Barber, 2007). In the freshwater systems in-
vestigated Trichodina spp. and Schistoce-
phaius solidus are the dominant species. In
the marine environment the parasites ap-
pear to be very evenly distributed with the
exception of the nematode Hysterothylacium
aduncum, which was found twice at one ma-
rine locality. However, its low occurrence
does not affect the overall picture of biodi-
versity.
In conclusion Faroese stickleback popu-
lations should offer good possibilites for
future studies while trying to establish the
effect on the host of single parasite species,
like Schistocephalus solidus and Thersitina
gasterostei. Other Faroese islands also remain
to be investigated, especially from an evolu-
tionary point of view.
Acknowledgements.
This work was financed by The Environmen-
tal Fund, Ministery of National Affairs, Far-
oes; The Scientific Fund of Føroya Sparikassi
and the Statoil Faroes Group. The work was
carried out at Faroe Fisheries Laboratory
(Fiskirannsóknarstovan). Regin Christiansen
measured the salinities and important sam-
pling help were obtained from the biologists
Jóhannis Danielsen and Kári Purkhús.
We thank all cooperating persons. The
comments and constructive suggestions of
the referee prof. Pehr H. Enckell are greatly
appreciated.
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