Omotoso O T, Adedire C O
Department of Zoology, University of Ado-Ekiti, P.M.B. 5363, Ado-Ekiti, Nigeria.
J Zhejiang Univ Sci B. 2007 May;8(5):318-22. doi: 10.1631/jzus.2007.B0318.
Adult (ADS) and larva stages of palm weevil Rhynchophorus phoenicis were analyzed for their nutritional potentials using proximate and mineral contents as indices. The early larva stage (ELS) contains the highest moisture content of 11.94% while ADS has the least value of 4.79%. The late larva stage (LLS) has the highest protein content of 10.51% while ADS contains 8.43%. Ash content is highest in ELS with a value of 2.37% and lowest in ADS with a value of 1.43%. ELS and LLS have the highest (22.14%) and lowest (17.22%) fibre contents respectively. The values of potassium, magnesium and iron in ELS were (455.00+/-21.21), (60.69+/-2.57) and (6.50+/-3.40) mg/kg while LLS recorded (457.50+/-10.61), (43.52+/-1.37) and (6.00+/-1.10) mg/kg and ADS recorded (372.50+/-24.75), (53.31+/-1.88) and (22.90+/-3.70) mg/kg. Chromium, phosphorus, nickel, calcium, lead, manganese and zinc were also detected. Copper was not detected in any of the samples. In all the developmental stages the protein solubilities were pH dependent with the minimum protein solubilities occurring at acidic pH while the maximum protein solubilities occurred at alkaline pH.
以棕榈象鼻虫Rhynchophorus phoenicis的成虫(ADS)和幼虫阶段为研究对象,以近似成分和矿物质含量为指标分析其营养潜力。幼虫早期阶段(ELS)的水分含量最高,为11.94%,而成虫阶段(ADS)的水分含量最低,为4.79%。幼虫后期阶段(LLS)的蛋白质含量最高,为10.51%,而ADS的蛋白质含量为8.43%。灰分含量在ELS中最高,为2.37%,在ADS中最低,为1.43%。ELS和LLS的纤维含量分别最高(22.14%)和最低(17.22%)。ELS中钾、镁和铁的含量分别为(455.00±21.21)、(60.69±2.57)和(6.50±3.40)mg/kg,LLS中分别为(457.50±10.61)、(43.52±1.37)和(6.00±1.10)mg/kg,ADS中分别为(372.50±24.75)、(53.31±1.88)和(22.90±3.70)mg/kg。还检测到了铬、磷、镍、钙、铅、锰和锌。所有样品中均未检测到铜。在所有发育阶段,蛋白质溶解度均依赖于pH值,酸性pH值下蛋白质溶解度最低,碱性pH值下蛋白质溶解度最高。