一种食蜜传粉昆虫的作物排空率和花蜜资源分配。

IF 2.3 2区 农林科学 Q1 ENTOMOLOGY
Noah DeFino, Goggy Davidowitz
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引用次数: 0

摘要

在蜜源传粉昆虫中,消耗花蜜的分配时间和模式会影响适应性特征和觅食行为。雌雄行为的差异会影响这些分配策略。尽管鳞翅目昆虫是重要的传粉昆虫,但这些生理模式在鳞翅目昆虫中并没有得到很好的研究。在这项研究中,我们调查了六翅曼杜鹃(Sphingidae)的作物清空率和花蜜分配,以及性别和飞行如何影响这些生理模式。在一次取食活动后,我们以固定的时间间隔解剖飞蛾,以测量嗉囊容积并分析糖分在飞行肌肉和脂肪体中的分配情况。然后,我们比较了静止和飞行的飞蛾,以检验活动如何改变这些模式。静止的雄蛾和雌蛾在取食六小时后清空嗉囊。雄蛾和雌蛾都优先将消耗的糖分分配给脂肪体,而不是飞行肌肉。飞蛾在清空嗉囊时开始将营养物质分配到脂肪体,并长期保留这些营养物质(进食后四天半)。与雌蛾相比,雄蛾更早地将消耗的糖分分配到飞行肌肉,并在飞行肌肉中长期保留这些分配的营养物质。飞行增加了雌性的空腹率,但对雄性没有影响。飞行对雄性和雌性在飞行肌肉或脂肪体中的分配没有明显影响。这项研究表明,雄性和雌性的蜜糖分配策略存在固有差异,但雄性和雌性在作物排空率上的差异与飞行活动有关。这些生理差异可能与雄性和雌性最大限度地提高自身体能的不同方式有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Crop-emptying rate and nectar resource allocation in a nectivorous pollinator

Crop-emptying rate and nectar resource allocation in a nectivorous pollinator

In nectivorous pollinators, timing and pattern of allocation of consumed nectar affects fitness traits and foraging behavior. Differences in male and female behaviors can influence these allocation strategies. These physiological patterns are not well studied in Lepidoptera, despite them being important pollinators. In this study we investigate crop-emptying rate and nectar allocation in Manduca sexta (Sphingidae), and how sex and flight influence these physiological patterns. After a single feeding event, moths were dissected at fixed time intervals to measure crop volume and analyze sugar allocation to flight muscle and fat body. Then we compared sedentary and flown moths to test how activity may alter these patterns. Sedentary males and females emptied their crops six hours after a feeding event. Both males and females preferentially allocated these consumed sugars to fat body over flight muscle. Moths began to allocate to the fat body during crop-emptying and retained these nutrients long-term (four and a half days after a feeding event). Males allocated consumed sugar to flight muscles sooner and retained these allocated nutrients in the flight muscle longer than did females. Flight initiated increased crop-emptying in females, but had no effect on males. Flight did not significantly affect allocation to flight muscle or fat body in either sex. This study showed that there are inherent differences in male and female nectar sugar allocation strategies, but that male and female differences in crop-emptying rate are context dependent on flight activity. These differences in physiology may be linked to distinct ways males and females maximize their own fitness.

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来源期刊
Journal of insect physiology
Journal of insect physiology 生物-昆虫学
CiteScore
4.50
自引率
4.50%
发文量
77
审稿时长
57 days
期刊介绍: All aspects of insect physiology are published in this journal which will also accept papers on the physiology of other arthropods, if the referees consider the work to be of general interest. The coverage includes endocrinology (in relation to moulting, reproduction and metabolism), pheromones, neurobiology (cellular, integrative and developmental), physiological pharmacology, nutrition (food selection, digestion and absorption), homeostasis, excretion, reproduction and behaviour. Papers covering functional genomics and molecular approaches to physiological problems will also be included. Communications on structure and applied entomology can be published if the subject matter has an explicit bearing on the physiology of arthropods. Review articles and novel method papers are also welcomed.
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