The effect of binder composition on ingestion and assimilation of microbound diets (MBD) by barramundi Lates calcarifer Bloch larvae
Partridge, G.J. and Southgate, P.C. (1999) The effect of binder composition on ingestion and assimilation of microbound diets (MBD) by barramundi Lates calcarifer Bloch larvae. Aquaculture Research, 30 (11-12). pp. 879-886.
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Using 14C-labelled microbound diets (MBD), five different binders were assessed for ingestion, assimilation and assimilation efficiency (AE) when fed to 18 day-old barramundi Lates calcarifer Bloch larvae. MBD bound with alginate and zein were ingested to the highest degree; however, the AE of these two diets was low. Diets bound with gelatin and carrageenan exhibited high AE, although ingestion was significantly lower than for alginate- and zein-bound diets. Combining two binders with different ingestion and assimilation characteristics was investigated as a means of improving diet performance. A diet bound with a 1:1 ratio of gelatin and alginate resulted in greater ingestion than MBD bound with gelatin alone and a higher AE than MBD bound with alginate alone. A third experiment investigated the effects of decreasing binder concentration on ingestion, assimilation and nutrient leaching. Alginate and gelatin were tested at concentrations of 1%, 2% and 3% of the dry weight of the MBD. No significant differences were detected in the ingestion or assimilation rates of the diets bound with different binder concentrations. Leaching losses from MBD containing 1% binder were significantly higher than those bound with 2% or 3% binder. It was concluded that either gelatin or carrageenan at 2-3% inclusion would be a suitable binder in weaning diets for barramundi larvae.
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|Publisher:||Blackwell Publishing Inc|
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