Size measurement and nutritional condition evaluation methods in sandfish (Holothuria scabra Jaeger)
MetadataShow full item record
Cited times in Scopus
The aims of this study were to establish an accurate size measurement method and a nutritional condition evaluation method of Holothuria scabra (Jaeger). Although 0.5% KCl and 0.05% MgSO4 did not induce anaesthesia, 2% menthol–ethanol for 20 min was found to be effective and harmless. The anaesthetization significantly reduced the coefficient of variation of the mean body length and weight by 68% and 43% respectively. During starvation, body size and weight decreased concomitantly, resulting in an unchanged condition factor (body weight/volume), suggesting that the condition factor cannot be used as an index of nutritional condition. Protein, cholesterol and carbohydrate concentrations in the body fluid were analysed to study the relationship with starvation. As the protein and cholesterol concentrations initially increased and then decreased during the starvation period, it is difficult to use them as an index of nutritional condition. The carbohydrate concentration showed a gradual one-fold increase during 10 days of starvation, and it may be used as a proxy for nutritional condition; however, further physiological studies are needed. Body fluid density and volume relative to body size gradually increased and decreased, respectively, during starvation. These methods may be used to correctly monitor the conditions of H. scabra in studies for aquaculture and stock enhancement techniques.
We are grateful to Jesus Rodriguez, Rema Sibonga, Harold Figurado and Roy Hipolito at SEAFDEC/AQD for the assistance in sandfish culture. This study was funded by the Japan International Research Center for Agricultural Sciences (JIRCAS).
Watanabe, S., Zarate, J. M., Sumbing, J. G., Lebata-Ramos, M. J. H., & Nievales, M. F. (2012). Size measurement and nutritional condition evaluation methods in sandfish (Holothuria scabra Jaeger).
Aquaculture Research, 43(6), 940-948. https://doi.org/10.1111/j.1365-2109.2011.02908.x
- Journal Articles 
Showing items related by title, author, creator and subject.
Investigations on the feeding behavior of juvenile milkfish (Chanos chanos Forsskål) in brackishwater lagoons on South Tarawa, Kiribati Lückstädt, Christian; Reiti, Takaeang (Verlag Natur und Wissenschaft, 2002)This study evaluated the feeding behavior of the milkfish (Chanos chanos Forsskål) in extensively managed brackishwater lagoons on South Tarawa, Kiribati (Central Pacific) in August 1998. Feed intake, dietary overlap, fish ...
Growth performance and condition factor of juvenile milkfish (Chanos chanos) cultured in a marine pen in relation to body size and temperature Kodama, Masashi; Diamante, Rose Ann; Salayo, Nerissa D.; Castel, Raisa Joy G.; Sumbing, Joemel G. (Japan International Research Center for Agricultural Sciences (JIRCAS), 2021-04-01)The growth performance and condition factor (CF) of milkfish (Chanos chanos) in relation to body size and temperature were investigated in a shallow marine pen culture system in coastal waters of the Philippines. Three ...
Watanabe, Satoshi; Sumbing, Joemel; Lebata-Ramos, Ma. Junemie Hazel (Ministry of Tropical Agricultural Research Centre, 2014)The growth of the juvenile sea cucumber, Holothuria scabra, was studied under captivity to elucidate the growth variation pattern and determine the best-fit growth model to estimate age- and size-specific growth rates. ...