Intensive rearing of the
common barbel (Barbus barbus L.) larvae using dry starter feeds and natural
diet under controlled conditions
J.
Fiala, P. Spurný-2001
Czech Journal of Animal Science, 46(7): 320-326
(from Current Contents)
Abstract:
In an experiment we carried out intensive rearing of the fry of common
barbel (Barbus barbus L.) up to the age of 25 days from the beginning of
exogenous nutrition. The fish were fed 3 types of dry diets (recommended for
initial feeding of aquarium, freshwater and sea fish) containing different
levels of nutrients (proteins 48-62%, fat 7-12%) and live food (Artemia
salina nauplii), We studied the survival rate, individual weight (w), total
body length (TL), specific weight growth rate (SWGR) and condition of the
fry (condition coefficient according to Fulton - C-F). The results were
processed statistically using the method of one-way analysis of variance
(ANOVA). The highest survival rate (99.7%) and the statistically significant
(P < 0.01) highest growth rate were achieved in the barbel larvae fed
live diet (TL = 25.7 mm, w = 144.5 mg, respectively). The cumulative
survival rate of larvae fed dry diets was 73.8-97.6%. The most satisfactory
results of dry-diet-based feed were obtained when feeding starter feeds for
sea fish fry (TL = 21.0 mm, w = 101.6 mg). The C-F data for barbel fry
initially fed dry diets were statistically highly significantly higher (P
< 0.01) than for larvae fed live diets (i.e. 0.95-1.02 and 0.85,
respectively). These results showed that intensive initial feeding of barbel
fry under controlled conditions could be successful if suitable starter
feeds were applied.
(Mendel Univ Agr & Forestry Brno, Dept Fisheries
& Hydrobiol, Zemědělská 1, Brno 61300, Czech Republic,
e-mail: jifi@mendelu.cz)