Aquaculture Nutrition Volume 17, Number 6 (December 2011) 
The effect of dietary carbohydrates on the growth response, digestive gland glycogen and digestive enzyme activities of early spiny lobster juveniles, Jasus edwardsii
Authors: C.J. SIMON1,2,3, A. JEFFS 3 Author Affiliations:
| 1: | Tasmanian Aquaculture and Fisheries Institute, University of Tasmania, Nubeena Crescent, Taroona, Tas., Australia |
| 2: | National Institute of Water and Atmospheric Research, Kilbirnie, Wellington, New Zealand |
| 3: | Leigh Marine Laboratory, University of Auckland, Warkworth, New Zealand |
Source: Aquaculture Nutrition, Volume 17, Number 6 (December 2011) Page Numbers: 613 – 626 Available Full Text:
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Abstract: The effect of various carbohydrate sources (glucose, sucrose, agar, wheat, tapioca, maize, potato and dextrin), and inclusion levels of gelatinized maize starch (0, 70, 170, 270 g kg-1), incorporated in semi-purified diets on the performance [growth, survival, food consumption (FC), enzyme activity and glycogen content of the digestive gland (DG)] of spiny lobster juveniles was investigated in a 12-week culture experiment. There was no difference in specific FC among diets (1.1% BW day-1), but lobsters fed with fresh mussel grew significantly faster (specific growth rate = 1.8% BW day-1) than on the formulated diets (0.9–1.1% BW day-1). None of the carbohydrate supplements tested produced a significant improvement in growth or survival over a basal control diet. However, the diet containing 270 g kg-1native wheat starch resulted in the highest moulting (mean = 2.1 moults per lobster), glycogen (3.3 mg g-1) and free glucose (1.1 mg g-1) concentrations among lobsters fed with the formulated diets, suggesting a superior utilization of this source of carbohydrate. The greater glycogen (8.0 mg g-1tissue) and free glucose (2.0 mg g-1tissue) concentrations, as well as higher specific activity of a-amylase (2.3 versus <0.7 U mg-1for other diets), found in the DG of lobsters fed with fresh mussel indicated a metabolism strongly directed to the utilization of glycogen.
Citation: C.J. SIMON, A. JEFFS . The effect of dietary carbohydrates on the growth response, digestive gland glycogen and digestive enzyme activities of early spiny lobster juveniles, Jasus edwardsii. Aquaculture Nutrition, Volume 17, Number 6 (December 2011), pp. 613-626,
URL: http://ejournals.ebsco.com/direct.asp?ArticleID=4303841CAB0A6C633545
