Abstract
The arctic char (Salvelinus alpinus) which has disappeared from Lake Neuchâtel near 1963, has been reintroduced into this lake since 1979. In this study, growth and reproduction of char have been analyzed 4 years after reintroduction.
Age determination based on scales were more reliable then those based on otoliths. Growth rate decreased from the cohort born in 1979 to the cohort born in 1982. Nevertheless growth of char in Lake Neuchâtel is fast compared to other char populations. About 33% of the males were sexually mature in the second year of life. At this age, no females, and in the third year of life, only 18% of the females were mature. Most fish of both sex were mature at an age of 4 years.
A high correlation was found for data taken from other authors between fecundity and length of char. The data from Lake Neuchâtel char (this study) fit very well with this general relation.
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Rubin, P.JF., Buttiker, B. Croissance et reproduction de l'omble-chevalier,Salvelinus alpinus (L.), dans le lac de Neuchâtel (Suisse). Schweiz. Z. Hydrol 49, 51–61 (1987). https://doi.org/10.1007/BF02540379
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DOI: https://doi.org/10.1007/BF02540379