水尾熊蜂(Bombus terrestris,L. 1758)(膜翅目:喙蜂科)胃窦的性别二形性

IF 1.5 4区 医学 Q2 ANATOMY & MORPHOLOGY Journal of Morphology Pub Date : 2023-12-16 DOI:10.1002/jmor.21668
Frederic Hüftlein, Sven Ritschar, Christian Laforsch
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引用次数: 0

摘要

对像Bombus terrestris这样的真社会蜜蜂物种的研究主要集中在工蜂阶层,这就是为什么它们的形态和解剖结构已经得到了很好的描述。这包括消化道,它适合于吃花蜜和花粉。位于脑室和脑室之间的过渡处是一个高度特化的室,即前脑室。在土蜂雌蜂中,前室被肌肉包围,由四个前唇组成。然而,只对白蚁工蜂进行了详细的描述,而对雄性生殖种姓的前室没有研究。本文通过形态计量学、组织学和扫描电镜成像等方法,详细分析了地鼠雌雄前脑室的差异,揭示了其明显的两性二态性。雄性前脑室较宽,体积大于雌性前脑室。组织学分析显示,雄性前脑室有4个不同的腔室,其内部完全被毛发覆盖。相比之下,雌性地芽草的前室仅初步存在,在前室内部前室褶皱之间的连接处仅形成有毛的小袋。前室室的形态差异可能是基于不同的临时方式,因为雄性不返回群体并且飞行距离更远。这和精子的合成以及交配塞可能需要更高的能量储备,从而需要更高的食物储存能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Sexual dimorphism in the proventriculus of the buff-tailed bumblebee Bombus terrestris (L. 1758) (Hymenoptera: Apidae)

Research on eusocial bee species like Bombus terrestris is primarily focused on the worker caste, which is why their morphology and anatomy are already well described. This includes the alimentary tract, which is adapted for feeding on nectar and pollen. Located at the transition between crop and ventriculus is a highly specialised compartment, the proventriculus. In female workers of B. terrestris, the proventriculus is surrounded by muscles and consists of four anterior lips. A detailed description, however, is only provided for B. terrestis worker bees while studies on the proventriculus of the male reproductive caste are absent. Here, we provide a detailed analysis of the differences between the proventriculus of the B. terrestris males and females through morphometrics, histology and scanning electron microscopy imaging, and unravel a distinct sexual dimorphism. The male proventriculus is wider resulting in a greater volume than the female proventriculus. Histological analysis revealed 4 distinctive chambers of the male proventriculus, which are completely covered with hairs on the inside. In contrast, those chambers in the proventriculus of female B. terrestris, are only rudimentarily present forming only small pouches with hairs in the junctions between the proventricular folds inside the proventriculus. The morphological differences in the proventriculus may be based on different modi vivendi, as males do not return to the colony and fly longer distances. This and the synthesis of sperm and mating plug might require higher energy reserves, leading to the necessity of higher food storage capacities.

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来源期刊
Journal of Morphology
Journal of Morphology 医学-解剖学与形态学
CiteScore
2.80
自引率
6.70%
发文量
119
审稿时长
1 months
期刊介绍: The Journal of Morphology welcomes articles of original research in cytology, protozoology, embryology, and general morphology. Articles generally should not exceed 35 printed pages. Preliminary notices or articles of a purely descriptive morphological or taxonomic nature are not included. No paper which has already been published will be accepted, nor will simultaneous publications elsewhere be allowed. The Journal of Morphology publishes research in functional, comparative, evolutionary and developmental morphology from vertebrates and invertebrates. Human and veterinary anatomy or paleontology are considered when an explicit connection to neontological animal morphology is presented, and the paper contains relevant information for the community of animal morphologists. Based on our long tradition, we continue to seek publishing the best papers in animal morphology.
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