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Reading otoliths of eels, Anguilla anguilla (L.), of known age from Kolderveen, The Netherlands
Author(s) -
VØLLESTAD L. A.,
NÆSJE T. F.
Publication year - 1988
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1988.tb00588.x
Subject(s) - stocking , biology , fishery , otolith , anguillidae , anguilla rostrata , clearing , age groups , fish <actinopterygii> , demography , finance , sociology , economics
. In this study we aged eels, Anguilla anguilla (L.), from a pond in the Netherlands stocked with elvers in 1966. Yellow eels were sampled from the pond in 1981. Burning and cracking the otoliths of these eels gave the expected age (15 years) in 27% of the cases, with a mean estimated age of 12·3 years. As some immigration of young eels into the pond must have occurred after stocking, the percentage of correctly determined specimens is even higher. Clearing the otoliths in ethanol was not a good method for these eels, giving a mean estimated age of 7·7 years and no age over 10 years. The use of the burning and cracking technique is recommended.