Department of Zoology, University College, P.O. Box 78, CF1 1XL, Cardiff, Wales, UK.
J Chem Ecol. 1985 Oct;11(10):1399-409. doi: 10.1007/BF01012140.
The occurrence inHotea gambia adults of a sexual dimorphism in the divided dorsal abdominal scent gland (dg 1)is reported. Counts made of ducted secretory units indicate that female dg 1 regresses at the end of larval development, unlike male dg 1 which undergoes no regression. Other dorsal abdominal scent glands (dg 2, dg 3) which function in the larvae cease to function during the imaginai moult. From gas chromatographic, mass spectrometric and [(1)H]NMR data, the identity of the secretion from male adult dg 1 was established as virtually pure (E)-2-hexenol (a 100-mg mature male adult contains 0.5-1 μl of secretion). 2-Hexenol was also found in the reduced female adult dg 1. In the sexually monomorphic metathoracic scent gland, (E)-2-alkenals (C6, C8) and (E)-4-oxohex-2-enal, together with monoterpenes (β-pinene, limonene) but not 2-hexenol, were identified. The vapor of (E)-2-hexenol is repellent to both sexes ofHotea adults and toxic to blowfly (Calliphora) eggs.
报道了在冈比亚蝇成虫的背部分叉腹腺（dg1）中存在性二态性。对有导管的分泌单位的计数表明，雌性 dg1 在幼虫发育末期退化，而不像雄性 dg1 那样不退化。在幼虫中起作用的其他背部分泌腺（dg2、dg3）在 imaginal 蜕皮期间停止作用。根据气相色谱、质谱和 [(1)H]NMR 数据，确定雄性成虫 dg1 分泌物的身份为几乎纯的（E）-2-己烯醇（一个 100 毫克成熟雄性成虫含有 0.5-1 μl 的分泌物）。在还原的雌性成虫 dg1 中也发现了 2-己烯醇。在性单态的前胸腺中，鉴定出了（E）-2-烯醛（C6、C8）和（E）-4-氧己-2-烯醛，以及单萜（β-蒎烯、柠檬烯），但没有 2-己烯醇。（E）-2-己烯醇的蒸气对冈比亚蝇成虫的两性均具有驱避性，对麻蝇（Calliphora）卵具有毒性。
