TY - JOUR
T1 - Survival and growth compared between wild and farmed eel stocked in freshwater ponds
AU - Pedersen, Michael Ingemann
AU - Jepsen, Niels
AU - Rasmussen, Gorm
PY - 2017
Y1 - 2017
N2 - To evaluate the efficiency of eel stocking, we compared the survival and growth of wild eels (2–5 g) with that of “farmed” eels (3–6 g). Wild eels were caught in a river and farmed eels came from a farm, where wild imported glass eels are cultured. Two experiments of 5–12 month duration were conducted in a series of shallow, open ponds of approximately 200 m2. Wild and farmed eels were batch tagged, mixed and released in the ponds at an initial density of 0.5 individual/m2. Survival was rather high (34–88%) with variations between ponds. No significant difference in survival was found between wild and farmed during the first 5 month in both experiments. Growth rates were significantly higher for farmed eels compared to wild eels in both experiments. The results show that farmed eels performed better than wild eels. In regions with low recruitment the eel population may be increased by importing glass eels, stocked directly or stocked as on-grown farmed eel. The optimal size for stocking (between glass- and 3 g eels) may be determined through future studies
AB - To evaluate the efficiency of eel stocking, we compared the survival and growth of wild eels (2–5 g) with that of “farmed” eels (3–6 g). Wild eels were caught in a river and farmed eels came from a farm, where wild imported glass eels are cultured. Two experiments of 5–12 month duration were conducted in a series of shallow, open ponds of approximately 200 m2. Wild and farmed eels were batch tagged, mixed and released in the ponds at an initial density of 0.5 individual/m2. Survival was rather high (34–88%) with variations between ponds. No significant difference in survival was found between wild and farmed during the first 5 month in both experiments. Growth rates were significantly higher for farmed eels compared to wild eels in both experiments. The results show that farmed eels performed better than wild eels. In regions with low recruitment the eel population may be increased by importing glass eels, stocked directly or stocked as on-grown farmed eel. The optimal size for stocking (between glass- and 3 g eels) may be determined through future studies
U2 - 10.1016/j.fishres.2017.05.013
DO - 10.1016/j.fishres.2017.05.013
M3 - Journal article
SN - 0165-7836
VL - 194
SP - 112
EP - 116
JO - Fisheries Research
JF - Fisheries Research
ER -