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5. Conclusions. When the Icelandic capelin reaches ma-
turity (13—19 cm long) it is 2—4 (5) years old. The
age at which maturity is reached, depends upon the sea-
temperature where the time of adolescence is spent, as
indicated by the number of vertebrae in the different age-
groups. Allthough a large mass of capelin is found dead
or dying when the spawning (first spawning) is over,
a considerable number survives. The Icelandic capelin is
a race with a high number of vertebrae (66) 69—70 (72),
and the number in the males exceeds that in the females,
allthough not largely. The Icelandic capelin is clearly
distinct from the capelin found off Vancouver Island. The
relative number of males at least on the spawning grounds,
amounts only to 1.4—3.4%.
REFERENCES.
Awerinzew, S.: tíber die Verteilung von Mallotus villosus im Ba-
rentsmeer. Journal du Conseil Vol. IX. Copenhagen 1934.
Hart, J. L.: Sexual Dimorphism in Vertebrae Number in the Cape-
lin, Mallotus villosus (Miiller). Joum. of the Biol. Board of
Canada, Vol. III. Toronto 1937.
Hjort, Johan: Fluctuations in the Great Fisheries of Northern Eu-
rope. Rapp. et Proc.-Verb. Vol. XX. (pag. 113—114). Co-
penh. 1914.
Liljeborg, W.: Sveriges och Norges fauna. Fiskerne. Andre delen.
Uppsala 1891.
Schnackenbeck, W.: Mallotus villosus (0. Fr. Miiller). Fauna ich-
tyologique de l’Atlantic Nord. Copenh. 1931.
Sæmundsson, Bjarni: íslenzk dýr. I. Fiskarnir. Rvk. 1926.
----Fiskirannsóknir 1925—1926. Andvari 1927.
----Synopsis of the Fishes of Iceland. Rit Vísindafél. íslend-
inga II. Reykjavík 1932.