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首页> 外文期刊>Journal of Economic Entomology >Effect of Larval Density on Food Utilization Efficiency of Tenebrio molitor (Coleoptera: Tenebrionidae)
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Effect of Larval Density on Food Utilization Efficiency of Tenebrio molitor (Coleoptera: Tenebrionidae)

机译：幼虫密度对黄粉虫（Coleoptera：Tenebrionidae）食物利用效率的影响

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摘要

Crowding conditions of larvae may have a significant impact on commercial production efficiency of some insects, such as Tenebrio molitor L. (Coleoptera: Tenebrionidae). Although larval densities are known to affect developmental time and growth in T. molitor, no reports were found on the effects of crowding on food utilization. The effect of larval density on food utilization efficiency of T. molitor larvae was studied by measuring efficiency of ingested food conversion (ECI), efficiency of digested food conversion (EDC), and mg of larval weight gain per gram of food consumed (LWGpFC) at increasing larval densities (12, 24, 36, 48, 50, 62, 74, and 96 larvae per dm(2)) over four consecutive 3-wk periods. Individual larval weight gain and food consumption were negatively impacted by larval density. Similarly, ECI, ECD, and LWGpFC were negatively impacted by larval density. Larval ageing, measured as four consecutive 3-wk periods, significantly and independently impacted ECI, ECD, and LWGpFC in a negative way. General linear model analysis showed that age had a higher impact than density on food utilization parameters of T. molitor larvae. Larval growth was determined to be responsible for the age effects, as measurements of larval mass density (in grams of larvae per dm(2)) had a significant impact on food utilization parameters across ages and density treatments (in number of larvae per dm(2)). The importance of mass versus numbers per unit of area as measurements of larval density and the implications of negative effects of density on food utilization for insect biomass production are discussed.
机译：幼虫的拥挤条件可能会对某些昆虫的商业生产效率产生重大影响，例如黄粉虫（Ceneoptera molitor L。）（鞘翅目：Tenebrionidae）。尽管已知幼虫密度会影响到T. molitor的发育时间和生长，但未发现拥挤对食物利用的影响的报道。通过测量摄食转化率（ECI），消化转化率（EDC）和每克食用克重（LWGpFC）的幼虫增重mg，研究了幼虫密度对黄粉虫幼虫食物利用效率的影响。在四个连续的3周周期内增加了幼虫密度（每dm（2）分别有12、24、36、48、50、62、74和96个幼虫）。个体幼虫体重增加和食物消耗受到幼虫密度的负面影响。同样，ECI，ECD和LWGpFC受到幼虫密度的负面影响。幼虫的衰老（以四个连续的3周周期衡量）对ECI，ECD和LWGpFC产生了显着且独立的负面影响。一般线性模型分析表明，年龄对密度对白粉虱幼虫食物利用参数的影响大于密度。幼虫的生长被确定是造成年龄影响的原因，因为幼虫质量密度的测量（以每dm的幼虫克数（2））对不同年龄和密度处理（以每dm的幼虫数（ 2））。讨论了质量对每单位面积数量作为幼虫密度测量的重要性，以及密度对昆虫生物量生产中食物利用的负面影响的影响。

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