Foraging specificity of Tetralonia (Thygatina) macroceps (Hymenoptera: Apidae: Anthophorinae) on Argyreia cuneata (Convolvulaceae)

IF 0.7 4区 农林科学 Q4 ENTOMOLOGY Sociobiology Pub Date : 2023-06-29 DOI:10.13102/sociobiology.v70i2.8262
A. Udayakumar, R. Anjanappa, K. Subaharan, T. M. Shivalingaswamy
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Abstract

Floral specificity is a behavior that evolved due to mutualistic interactions between the plant-pollinator community. Flowers advertise themselves using visual or chemical cues to attract pollinators and gain reproductive success through pollination. Pollinators forage for rewards such as nectar or pollen produced by the flowers. We found that an anthophorid bee, Tetralonia macroceps, foraged specifically on Argyreia cuneata flowers. No visitation was observed on the flowers of A. nervosa though both belong to Convolvulaceae. T. macroceps was the most abundant floral visitor (5.21 bees/flower/5 min) on A. cuneata and did not visit A. nervosa. Mass flowering and narrow tubular flower structure with easy access to pollen in A. cuneata were the traits that accounted for the foraging specificity of T. macroceps. The present study investigates the preference of T. macroceps for the flowers and floral extracts of A. cuneata and A. nervosa. The bee visited 10.16 flowers/5 min of A. cuneata. T. macroceps were highly attracted to the flowers of A. cuneata. No bees were attracted to A. nervosa. The floral abundance of A. cuneata was relatively higher compared to A. nervosa. Pollen analysis of foraging bees of T. macroceps revealed the selective preference towards the pollen of A. cuneata. The highest number of bees preferred the extract of A. cuneata (7.75) compared to A. nervosa (0.50) in the Y-olfactory maze. Floral extract of A. cuneata caused the highest neuronal electroantennogram (EAG) response (1.48 mV) than A. nervosa (0.36 mV). Our preliminary studies indicated the presence of specific volatile organic compounds (VOCs) nonacosane (13.26%), hexatriacontane (12.06%), and beta farnesene (6.19%) observed in A. cuneata were absent in congener A. nervosa.
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大蜂四花蜂(膜翅目:蜂科:花蜂科)对圆叶银蜂的觅食特性
花的特异性是由于植物传粉昆虫群落之间的互惠相互作用而进化的一种行为。花朵利用视觉或化学线索来吸引传粉者,并通过授粉获得繁殖成功。授粉者寻找花蜜或花朵产生的花粉等奖励。我们发现一种花蜂,大花蜂,专门在金刚鹦鹉的花上觅食。神经花虽同属旋花科,但未观察到有访花现象。T.macroceps是A.cuneata上最丰富的花访客(5.21只蜜蜂/花/5min),而没有访问A.nervosa。大花T.macroceps的大量开花和易于获得花粉的窄管状花结构是其觅食特异性的特征。本研究调查了大花T.macrops对A.cuneata和A.nervosa的花和花提取物的偏好。蜜蜂每5分钟造访10.16朵花。T.macroceps被A.cuneata的花高度吸引。没有蜜蜂被神经A.nervosa吸引。楔形A.cuneata的花丰度相对高于神经A.nervosa。对大花T.macroceps采蜂花粉的分析表明,大花T.acroceps对大花A.cuneata花粉有选择性偏好。在Y嗅觉迷宫中,与神经A.nervosa(0.50)相比,最喜欢楔形A.cuneata提取物的蜜蜂数量最多(7.75)。楔形A.cuneata的花提取物引起的神经元触角电图(EAG)反应(1.48mV)高于神经性A.nervosa(0.36mV)。我们的初步研究表明,在楔状A.cuneata中观察到的特定挥发性有机化合物(VOCs)壬烷(13.26%)、六碳烷(12.06%)和β-法尼烯(6.19%)在神经性A.nervosa的同类中不存在。
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来源期刊
Sociobiology
Sociobiology 生物-昆虫学
CiteScore
1.60
自引率
11.10%
发文量
28
审稿时长
3 months
期刊介绍: SOCIOBIOLOGY publishes high quality articles that significantly contribute to the knowledge of Entomology, with emphasis on social insects. Articles previously submitted to other journals are not accepted. SOCIOBIOLOGY publishes original research papers and invited review articles on all aspects related to the biology, evolution and systematics of social and pre-social insects (Ants, Termites, Bees and Wasps). The journal is currently expanding its scope to incorporate the publication of articles dealing with other arthropods that exhibit sociality. Articles may cover a range of subjects such as ecology, ethology, morphology, population genetics, physiology, toxicology, reproduction, sociobiology, caste differentiation as well as economic impact and pest management.
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