TY - JOUR
T1 - Effects of L-carnitine enrichment on the population growth, egg ratio and body size of the marine rotifer, Brachionus rotundiformis
AU - Dong, Ming Zhang
AU - Yoshimatsu, Takao
AU - Furuse, Mitsuhiro
N1 - Funding Information:
The authors would like to thank assistant professor Ida Pahia, University of the Philippines in the Visayas, for critical reading of the manuscript. Some part of this study was conducted in National Research Institute of Aquaculture, Mie, Japan. This study was supported by the Japanese government (Ministry of Education, Culture, Sports, Science and technology).
PY - 2005/7/29
Y1 - 2005/7/29
N2 - L-Carnitine enrichment has shown considerable influence on the population growth, reproduction and individual growth of rotifer, Brachionus rotundiformis. Rotifers were enriched with 8 levels of L-carnitine supplements dissolved in Nannochloropsis oculata culture medium in a 3 ml-individual culture trial for 10 days, and 5 levels in Chlorella vulgaris culture medium in one l batch culture trial for 5 days. In the batch culture trial, 42, 38 and 50% increase in population densities (P < 0.05) were observed in 1, 10 and 100 mg l -1 treatments, respectively, whereas, the 1000 mg l-1 treatment had a significant decrease in population density (34-45%, P < 0.05) and markedly higher egg ratio (P < 0.05). The 1000 mg l-1 L-carnitine-enriched rotifers obtained significantly smaller body size (P < 0.01), but those enriched with the other 3 levels of L-carnitine (1, 10, 100 mg l-1) showed larger body size. In the individual culture trial, an increasing trend was observed in population density after 5 days and 10 days of culture in 0.001-10 mg l-1 treatments. The results suggest that L-carnitine could be a positive factor to enhance reproduction and population growth on enriched rotifers directly or/and indirectly under the optimum concentration. The lipid metabolism in rotifers may be carnitine-dependent.
AB - L-Carnitine enrichment has shown considerable influence on the population growth, reproduction and individual growth of rotifer, Brachionus rotundiformis. Rotifers were enriched with 8 levels of L-carnitine supplements dissolved in Nannochloropsis oculata culture medium in a 3 ml-individual culture trial for 10 days, and 5 levels in Chlorella vulgaris culture medium in one l batch culture trial for 5 days. In the batch culture trial, 42, 38 and 50% increase in population densities (P < 0.05) were observed in 1, 10 and 100 mg l -1 treatments, respectively, whereas, the 1000 mg l-1 treatment had a significant decrease in population density (34-45%, P < 0.05) and markedly higher egg ratio (P < 0.05). The 1000 mg l-1 L-carnitine-enriched rotifers obtained significantly smaller body size (P < 0.01), but those enriched with the other 3 levels of L-carnitine (1, 10, 100 mg l-1) showed larger body size. In the individual culture trial, an increasing trend was observed in population density after 5 days and 10 days of culture in 0.001-10 mg l-1 treatments. The results suggest that L-carnitine could be a positive factor to enhance reproduction and population growth on enriched rotifers directly or/and indirectly under the optimum concentration. The lipid metabolism in rotifers may be carnitine-dependent.
UR - http://www.scopus.com/inward/record.url?scp=23044508061&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=23044508061&partnerID=8YFLogxK
U2 - 10.1016/j.aquaculture.2005.04.019
DO - 10.1016/j.aquaculture.2005.04.019
M3 - Article
AN - SCOPUS:23044508061
SN - 0044-8486
VL - 248
SP - 51
EP - 57
JO - Aquaculture
JF - Aquaculture
IS - 1-4
ER -
