Arnaud Ludovic, Brostaux Yves, Lallemand Stéphane, Haubruge Eric
Department of functional and evolutionary Entomology, Gembloux Agricultural University, Passage des déportés, 2 - B-5030 Gembloux, Belgium.
J Insect Sci. 2005 Nov 4;5:33. doi: 10.1093/jis/5.1.33.
Although, beetles of the genus Tribolium first evolved as saprophylic insects, they have adapted to the stored products environment for several thousand years. In this study reproductive strategies are described for eight species of Tribolium that are known to occur in this environment. Experiments were conducted under the same conditions for every species, and several life history traits, including egg mass, adult mass, developmental time and fecundity were examined and compared among these species. Common reproductive strategies were not found among the different species and univariate analysis highlighted strong differences between the species for most of the traits investigated. Some species showed reproductive traits that are likely to give a fitness advantage in the environment of stored products. Multivariate statistical analysis allowed the detection of different sub-groups with respect to their reproductive strategy. Adult mass and egg-to-adult developmental time discriminated between groups. Intraspecific allometric relationships were further investigated but only a few correlations appeared to be significant.
尽管赤拟谷盗属的甲虫最初进化为腐食性昆虫，但它们已经适应储存产品环境达数千年之久。在本研究中，描述了已知存在于该环境中的八种赤拟谷盗的繁殖策略。对每个物种都在相同条件下进行了实验，并对包括卵块、成虫质量、发育时间和繁殖力在内的几个生活史特征进行了检查和比较。在不同物种之间未发现共同的繁殖策略，单变量分析突出了在所研究的大多数特征上物种之间的强烈差异。一些物种表现出的繁殖特征可能在储存产品环境中具有适应性优势。多变量统计分析能够检测出在繁殖策略方面不同的亚组。成虫质量和卵到成虫的发育时间在各亚组之间存在差异。进一步研究了种内异速生长关系，但只有少数相关性似乎具有显著性。
