Yield per recruit from stocking two different sizes of eel (Anguilla anguilla) in the brackish Roskilde Fjord

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Abstract

Stocking of young eel is widely practised, as a measure, to meet the management target of the EU eel recovery plan. The target of the recovery plan is to increase the escapement to 40% silver eel biomass, relative to pristine conditions. The scientific information to predict the outcome in silver eel
biomass from stocking is limited andmaydepend on whether translocation of wild glass eel or yellow eel is used, or if the stocked eels used are yellow
eel from aquaculture. We evaluated the yield from stocking two different sizes, 3 and 9 g eels from aquaculture. A professional fishery recaptured
12.7% of the 3 g and 9.4% of the 9 g eels, originally stocked. Growth rate and mortality rate were different for the two stocked sizes, favouring the
small eels. Brutto yield per recruit (YPR) was 13 and 9.2 g and netto YPR was 9.8 and 0.31 g for 3 and 9 g eel, respectively. We conclude that there
seems to be no advantage in using larger 9 g eels compared with small 3 g eels for stocking
Original languageEnglish
JournalICES Journal of Marine Science
Volume73
Issue number1
Pages (from-to)158-164
ISSN1054-3139
DOIs
Publication statusPublished - 2016

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