Fróðskaparrit - 01.01.1995, Síða 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
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Brinck, P. 1966. Animal Invasion of Glacial and Late
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Chappuis, P.A. 1942. Eine neue Methode zur
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Delamare Deboutteville, C. 1960. Biologie des eaux
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Enckell, P.H. 1969. Distribution and dispersal of
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Enckell, P.H. 1989. When, How and Whence? A
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Noodt, W. 1968. Deuten die Verbreitungsbilder
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