Fróðskaparrit - 01.01.1995, Page 101

PARASTENOCARIS GLACIALIS IN THE FAROE ISLANDS
105
beaches in winter, at temperatures around
the freezing point. The frozen state, al-
though not normal, thus does not seem to
pose a lethal threat to these species.
In northem Sweden P. glacialis repro-
duces during June-July (Enckell, 1969) and
the nauplii mature in about two months.
During this period both nauplii, metanau-
plii and adults can be found together. The
conditions seem to be similar in the Faroes,
since nauplii, metanauplii and adults were
found together in, e.g., Leynarvatn and Sør-
vágsvatn.
Tilzer, M. 1968. Zur Ókologie und Besiedlung des
hochalpinen hyporheischen Interstitials im
Arlberggebiet (Ósterreich). Arch. Hydrobiol. 65:
253-308.
Pehr H Enckell
Department of Ecology, Animal Ecology
Lund University
Ecology Building
S-223 62 Lund, Sweden
Acknowledgement
I thank D. Bloch for laboratory facilities and C. Brinck
for assistance in the field.
References
Borutzky, E.B. 1952. Fauna SSSR 3(4).
Harpacticoidea. - Moscow and Leningrad.
Brinck, P. 1966. Animal Invasion of Glacial and Late
Glacial terrestrial environments in Scandinavia.
Oikos 17: 250-266.
Chappuis, P.A. 1942. Eine neue Methode zur
Untersuchung der Grundwasserfauna. Acta Sci.
Math. Natur. T. 6, Budapest.
Delamare Deboutteville, C. 1960. Biologie des eaux
souterraines littorales et continentales. Paris.
Enckell, P.H. 1969. Distribution and dispersal of
Parastenocarididae (Copepoda) in northem Europe.
Oikos 20: 493-507
Enckell, P.H. 1989. When, How and Whence? A
tentative background for the Postglacial
Immigration of Terrestrial Invertebrates to the
Faroes. Fródskaparrit 34-35 (1986-87): 50-67.
Jansson, B.-O. 1968. Quantitative and experimental
smdies of the interstitial fauna in four Swedish
sandy beaches. Ophelia 5: 1-71.
Noodt, W. 1968. Deuten die Verbreitungsbilder
reliktarer Gmndwasser-Cmstaceen alte
Kontinentzusammenhánge íinlNaturwiss.
Rundschau 21: 470-476.