Náttúrufræðingurinn - 1985, Side 65
Coexistence and immigration of two
sympatric arctic charr. — í: E.K. Balon
(ritstj.), Charrs, salmonid fishes of the
genus Salvelinus: 757—763. Dr. W.
Junk Publishers, The Hague.
Landsvirkjun. 1965. Sogsvirkjunin. Lýsing
virkjananna í Sogi. Reykjavík: 22 bls.
Lindegaard, C. 1980. Bathymetric
distribution of Chironomidae (Diptera)
in the oligotrophic Thingvallavatn, Ice-
land. - í: D.A. Murray (ritsj.), Chir-
onomidae-Ecology, systematics, cyto-
logy and physiology: 225—232. Sérpr.
Pergamon Press Oxford.
Lindström, T. 1955. On the relation fish
size - food size. - Rep. Inst. Freshw.
Res. Drottningholm. 36: 133—147.
Nikolsky G.V. 1963. The ecology of
fishes. — Academic Press, London. 352
bls.
Nilsson, N.-A. 1955. Studies on the feed-
ing habits of trout and char in North
Swedish lakes. — Rep. Inst. Freshw.
Res. Drottningholm. 36: 163—225.
Nilsson, N.-A. 1963. Interaction between
trout and char in Scandinavia. — Trans.
Am. Fish. Soc. 92: 276—285.
Nilsson, N.-A. & O. Filipsson. 1971. Char-
acteristics of two discrete populations
of arctic char (Salvelinus alpinus L.) in
a North Swedish Iake. — Rep. Inst.
Freshw. Res. Drottningholm. 51: 90—
108.
Nordeng, H. 1961. On the biology of char
(Salmo alpinus L.) in Salangen, North
Norway. I. Age and spawning fre-
quency determined from scales and
otoliths. — Nytt mag. Zool. 10: 67—
123.
Nordeng, H. 1983. Solution to the „char
problem" based on Arctic char (Salveli-
nus alpinus) in Norway. - J. Fish.
Aquat. Sci. 40: 1372-1387.
Nyman, L., J. Hammar & R. Gydemo.
1981. The systematics and biology of
landlocked populations of arctic char
from Northern Europe. — Rep. Inst.
Freshw. Res. Drottningholm. 59: 128—
141.
Ranta—aho, K. 1983. Rödingens (Salveli-
nus alpinus L.) yngelbiologi och eko-
logi i sjön Mývatn. - Prófritgerð í líf-
fræði við Háskóla íslands: 53 bls.
Saavaitova, K.A. 1980. Taxonomy and
biogeography of charrs in the Palearc-
tic. — í: E.K. Balon (ritstj.), Charrs,
salmonid fishes of the genus Salvelinus:
281—294. Dr. W. Junk Publishers, The
Hague.
Sigurður Snorrason. 1982. The littoral
ecosystem and the ecology of Lymnaea
peregra in Lake Thingvallavatn, Ice-
land. — Ph. D. ritgerð, Liverpool Uni-
versity, England.
Sigurður Snorrason, Hilmar Malmquist &
Skúli Skúlason. 1984. Murturannsóknir
1983. — Skýrsla á vegum Líffræði-
stofnunar H.í. og Þingvallavatnsrann-
sókna: 25 bls.
Sigurjón Rist. 1975. Stöðuvötn - Orku-
stofnun. OSROD-7519.
Skreslet, S. 1973a. The ecosystem of the
arctic lake Nordlaguna, Jan Mayen
Island. III. Ecology of arctic char, Sal-
velinus alpinus (L.). - Astarte 6: 43-
54.
Skreslet, S. 1973b. Group segregation in
landlocked arctic char, Salvelinus alpi-
nus (L.), of Jan Mayen Island, in rela-
tion to the char problem. - Astarte 6:
55-58.
Skúli Skúlason. 1983. Útlit, vöxtur og
æxlunarlíffræði mismunandi gerða
bleikjunnar, Salvelinus alpinus (L.), í
Þingvallavatni. - Prófritgerð í líffræði
við Háskóla íslands: 204 bls.
Úlfar Antonsson. 1977. Dýrasvifið í
Þingvallavatni 1972-75. - Prófritgerð
í líffræði við Háskóla ísland: 60 bls.
Úlfar Antonsson. 1980. The arctic char
population in lake Thingvallavatn (Ice-
land). - Inst. Limnol. Uppsala. Hand-
rit: 39 bls.
Wootton, R. J. 1976. The Biology of
Sticklebacks. - Academic Press, Lon-
don, 376 bls.
215