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Decapsulated A rtemia cysts of different quality (high or low hatch‐rate) as direct food for tench ( T inca tinca L .) larvae
Author(s) -
Celada Jesús D.,
García Vanesa,
Carral José M.,
SáezRoyuela María,
González Rocío,
González Álvaro
Publication year - 2013
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.1365-2109.2011.03020.x
Subject(s) - biology , hatching , zoology , larva , live food , anatomy , fishery , aquaculture , ecology , fish <actinopterygii>
Three 30‐day experiments were conducted to evaluate decapsulated A rtemia cysts with different quality (high or low hatch‐rate) as food for tench ( T inca tinca L .) larvae from the onset of exogenous feeding. In experiment 1, three diets were tested: A rtemia nauplii‐only or cysts‐only for 30 days, and nauplii for the first 7 days and cysts thereafter. The cysts used had 86% hatching rate (high hatch‐rate cysts). The same feeding treatments were replicated in experiment 2 but with low hatch‐rate cysts (10% hatching rate). In experiment 3, five diets were tested: high hatch‐rate cysts only or low hatch‐rate cysts only for 30 days, and nauplii for the first 7, 4 or 2 days and low hatch‐rate cysts thereafter. In overall, survival was high, except with the low hatch‐rate cysts only diet. Feeding tench larvae with cysts resulted in higher growth and lower FCR compared to feeding with live nauplii only. High hatch‐rate A rtemia cysts are a suitable food from the onset of exogenous feeding and low hatch‐rate cysts can be successfully used after 2–7 days feeding on nauplii.