摘要
Nutrient compositions including proximate, fatty acids, amino acids, minerals and vitamins in tissues of the wild spot-fin porcupinefish(Diodon hystrix) were analyzed in detail to assess their nutrient value and to further explore the dietary requirements of this species farmed. Diodon hystrix individuals with similar body weight(284.6-358.5 g) and body length(15.9-21.8 cm) were collected from the South China Sea from Aug., 2015 to Aug., 2016. In general, skin and muscle possessed negligible fat contents(0.3-0.4 g/100 g wet weight) and low energy value(317.4-497.3 k J/100 g), while proteins(17.8-25.4 g/100 g wet weight) were found to be the richest component. The dominant amino acids in both muscle and skin of D. hystrix included histidine, cysteine, tyrosine, isoleucine, leucine and lysine, while the major mineral elements were calcium, magnesium, potassium,sodium, and phosphorus. It was apparent that D. hystrix had high content of amino acids, and the rate of essentia amino acids was accorded with FAO/WHO standard. This study illustrated that the wild D. hystrix would be a valuable natural source of protein, with high commercial potential, and especially, skin and muscle were more valuable. Moreover, the basic data from the present study would supply the fundamental reference for formulated diet and culture of this species.
Nutrient compositions including proximate, fatty acids, amino acids, minerals and vitamins in tissues of the wild spot-fin porcupinefish （Diodon hystrix） were analyzed in detail to assess their nutrient value and to further explore the dietary require- ments of this species farmed. Diodon hystrix individuals with similar body weight （284.6-358.5 g） and body length （15.9-21.8 cm） were collected from the South China Sea from Aug., 2015 to Aug., 2016. In general, skin and muscle possessed negligible fat contents （0.3-0.4 g/100 g wet weight） and low energy value （317.4-497.3 k J/100 g）, while proteins （17.8-25.4 g/100 g wet weight） were found to be the richest component. The dominant amino acids in both muscle and skin of D. hystrix included histi- dine, cysteine, tyrosine, isoleucine, leucine and lysine, while the major mineral elements were calcium, magnesium, potassium, sodium, and phosphorus. It was apparent that D. hystrix had high content of amino acids, and the rate of essentia amino acids was accorded with FAO/WHO standard. This study illustrated that the wild D. hystrix would be a valuable natural source of pro- tein, with high commercial potential, and especially, skin and muscle were more valuable. Moreover, the basic data from the present study would supply the fundamental reference for formulated diet and culture of this species.
基金
Supported by Major Science and Technology Projects from Science and Technology Department of Hainan Province,China(ZDKJ2016009
ZDKJ2016013)
Natural Science Foundation of Hainan Province(20163074)
Key laboratory of Seawater Aquaculture Research of Sanya City(L1507)
