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Full-text - Norsk entomologisk forening

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248 A. Lillehammer<br />

streams are to a large extent rendered invalid.<br />

The northern areas Kautokeino, Pasvik<br />

and Alta support the highest number of northeastern<br />

species, and the lowland areas in<br />

southern Norway the lowest. The most continental<br />

areas in southern Norway contain<br />

the highest number of north-eastern species,<br />

and the coastal areas of Rogaland and Oslofjord<br />

the lowest.<br />

Generally, distribution of Norwegian stoneflies<br />

seems to be connected with major factors<br />

such as differences in climate, vegetation<br />

region and historical immigration. Mo~<br />

locally, distribution seems to be associated<br />

with factors such as the amount of deciduous<br />

vegetation in the vicinity of the watercourse,<br />

the amount of allochthonous organic matter,<br />

and substratum and temperature.<br />

ACKNOWLEDGEMENTS<br />

I am grateful to Dr. John Brittain, Cand. real.<br />

P. Larsson, Dr. L. Semme and Professor R.<br />

Vik for criticism of the manuscript. I am<br />

indebted to 1. Lund, R. Mostad, F. Smedstad<br />

and E. Vastaberg for technical assistance. I<br />

am much obliged to the following persons<br />

who helped with collecting material or loaned<br />

me material: Chr. Handersen, R. Borgstrem,<br />

R. Dahlby, J. Eie, B. Faafeng, L. Greve, J.<br />

Holmlund, K. Heiby, B. Kinded.s, A. Klemmetsen,<br />

B. Kvitvcer, P. Larsson, L. Lien, M.<br />

Lillehammer, R. Mehl, 1. Munitz, ]. Pedersen,<br />

]. Raastad, ]. Solem, G. Tveit, H.<br />

Walden, G. Westereng and F. Aarefjord.<br />

My sincere appreciation is also extended to<br />

the following for loan of material: Dr. A.<br />

Leken, Zoological Museum, University of<br />

Bergen; J Andersen, Tromse Museum,<br />

Tromse; ]. Solem, The Royal Norwegian<br />

Society of Science and Letters, The Museum,<br />

Trondheim. The investigation was financed<br />

by the Norwegian Research Council for<br />

Science and the Humanities.<br />

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Polenz. Z. Fisch. N. F. 6, 209-240.<br />

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Badcock, R. M. 1953. Comparative studies in the<br />

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Drottningholm 35, 1954, 38-50.<br />

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degn-, sten- og varfluer (Ephemeroptera, Plecoptera,<br />

Trichoptera). <strong>Norsk</strong> ent. 7idsskr. 13,<br />

11-15.<br />

Brinck, P. 1949. Studies on Swedish stonefIies<br />

(Plecoptera). O/1usc. ent. Suppl. 11, 1-250.<br />

Brinck, P. 1958. On some stoneflies recorded from<br />

Novaya Zemlya. Avh. <strong>Norsk</strong>e Vidensk Akad.<br />

Oslo. I mat.-nat. KI. 1958, nr. 2, 1-11.<br />

Brinck, P. & Froehlich, C. G. 1960. On the stonefly<br />

fauna of western Lule Lappland, Swedish<br />

Lappland. K. fysiogr. Siillsk. Lund Forh. 30 (I),<br />

1-19.<br />

Brinck, P. & Wingstrand, K. G. 1949. The mountain<br />

fauna of the Virihaure area in Swedish<br />

Lappland. 1. General account. Lunds Univ. Arsskr.<br />

N. F. Avd. 2, 45 (2), 1-70.<br />

Brinck, P. & Wingstrand, K. G. 1951. The mountain<br />

fauna of the Virihaure area in Swedish<br />

Lappland. 11. Special account. Lunds Univ. Arsskr.<br />

N. F. Avd. 2,46 (2), 1-173.<br />

Brittain, J. 1974. Studies on the lentic Ephemeroptera<br />

and Plecoptera of southern Norway. <strong>Norsk</strong><br />

ent. Tidsskr. 21, 135-153.<br />

Dodds, G. S. & Hisaw, F. L. 1925. Ecological<br />

studies on aquatic insects IV. Altitudinal range<br />

and zonation of mayflies, stoneflies and caddis<br />

flies in the Colorado Rockies. Ecology 6, 380­<br />

390.<br />

Elgmork, K. & S

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