caa a22 4500 477116426 CHVBK 20180405111623.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00002378 doi (NATIONALLICENCE)springer-10.1007/BF00002378 The migration of spawning stocks of grayling Thymallus thymallus , in Lake Mjøsa, Norway [Elektronische Daten] [Harald Kristiansen, Kjell Dølving] Synopsis: The migration of grayling was studied in Lake Mjøsa and 13 of its tributaries in which grayling spawn. The study demonstrate that grayling spawn in creeks in May/June and leave for Lake Mjøsa shortly after spawning to return the next spring. Once mature, the grayling spawn every year. Grayling mix in the lake and are found at a mean distance of 11.9 km from the estuary of their spawning creek in September. Grayling embryos hatch in June and the juveniles stay in the tributaries until September/October. Grayling spend the winter months in the lake. Out of 1599 grayling tagged in tributaries during the spawning season, 240 of 284 recaptures (84.5%) were made in subsequent spawning seasons in the same tributary in which they were first tagged. Forty-four grayling were recaptured in adjacent tributaries. These results demonstrate that, despite the fact that all grayling leave the tributaries and mix in the lake, there is a high precision of homing. It is suggested that the grayling population in lake Mjøsa is composed of stocks using specific tributaries for spawning. Kluwer Academic Publishers, 1996 Life history nationallicence Growth nationallicence Maturity nationallicence Population specificity nationallicence Kristiansen Harald Tranberg videregáende skole, P.O. Box 534 Hunn, N-2801, Gjøvik, Norway aut Dølving Kjell Department of Biology, University of Oslo, P.O. Box 1051, N-0316, Oslo 3, Norway aut Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl 47/1(1996-09-01), 43-50 0378-1909 47:1<43 1996 47 10641 https://doi.org/10.1007/BF00002378 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00002378 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kristiansen Harald Tranberg videregáende skole, P.O. Box 534 Hunn, N-2801, Gjøvik, Norway aut NATIONALLICENCE 700 1- Dølving Kjell Department of Biology, University of Oslo, P.O. Box 1051, N-0316, Oslo 3, Norway aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl/ 47/1(1996-09-01), 43-50 0378-1909 47:1<43 1996 47 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer