Dvořáček Jiří, Sehadová Hana, Weyda František, Tomčala Aleš, Hejníková Markéta, Kodrík Dalibor
Institute of Entomology, Biology Centre, CAS, Branišovská 31, 370 05 České Budějovice, Czech Republic.
Faculty of Science, Branišovská 31, University of South Bohemia, 370 05 České Budějovice, Czech Republic.
Insects. 2020 Feb 12;11(2):120. doi: 10.3390/insects11020120.
is one of the largest insects in the world, but unfortunately, there is a lack of basic information about its biology. Previous papers have mostly described morphology or taxonomy, but studies concerning its anatomy and physiology are largely absent. Thus, we employed microscopic, physiological, and analytical methods to partially fill this gap. Our study focused on a detailed analysis of the antennal sensilla, where coeloconic sensilla, grouped into irregularly oval fields, and sensilla trichoidea were found. Further, the inspection of the internal organs showed apparent degeneration of the gut and almost total absence of fat body. The gut was already empty; however, certain activity of digestive enzymes was recorded. The brain was relatively small, and the ventral nerve cord consisted of three ganglia in the thorax and four ganglia in the abdomen. Each testis was composed of approximately 30 testicular follicles filled with a clearly visible sperm. Chromatographic analysis of lipids in the flight muscles showed the prevalence of storage lipids that contained 13 fatty acids, and oleic acid represented 60% of them. Some of our findings indicate that adult rely on previously accumulated reserves rather than feeding from the time of eclosion.
是世界上最大的昆虫之一，但不幸的是，关于其生物学的基本信息却很匮乏。以往的论文大多描述了其形态或分类，但关于其解剖学和生理学的研究却基本缺失。因此，我们采用了显微镜、生理学和分析方法来部分填补这一空白。我们的研究重点是对触角感器进行详细分析，发现了呈不规则椭圆形排列的腔锥感器和毛形感器。此外，对内部器官的检查显示肠道明显退化，脂肪体几乎完全缺失。肠道已经是空的；然而，仍记录到了某些消化酶的活性。脑相对较小，腹神经索由胸部的三个神经节和腹部的四个神经节组成。每个睾丸由大约30个充满明显可见精子的睾丸滤泡组成。对飞行肌中脂质的色谱分析表明，储存脂质占优势，其中含有13种脂肪酸，油酸占其中的60%。我们的一些发现表明，成虫从羽化时起就依赖先前积累的储备而非进食。
