The Supercooling Responses of the Solitary Bee Osmia excavata (Hymenoptera: Megachilidae) under the Biological Stress of Its Brood Parasite, Sapyga coma (Hymenoptera: Sapygidae)

(1) Background: Many insects have evolved different strategies to adapt to subzero temperatures and parasites, but the supercooling response of pollinator populations under the brood parasitism pressure has not been sufficiently investigated. (2) Methods: This study assessed the supercooling traits...

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Bibliographic Details
Published in:Insects (Basel, Switzerland) Switzerland), 2022-02, Vol.13 (3), p.235
Main Authors: Yan, Zhuo, Wang, Lina, Reddy, Gadi V P, Gu, Shimin, Men, Xingyuan, Xiao, Yunli, Su, Jianwei, Ge, Feng, Ouyang, Fang
Format: Article
Language:English
Subjects:
Bees
Biological stress
Body temperature
brood parasite
Brood parasitism
Cold
Coma
Defecation
Females
Hymenoptera
Insects
Males
Osmia excavata
overwintering
Parasites
Parasitism
Physiology
Pollinators
Populations
Pressure
Reptiles & amphibians
Sex
solitary bee
Species
Stress (physiology)
Supercooling
Towns
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Summary:(1) Background: Many insects have evolved different strategies to adapt to subzero temperatures and parasites, but the supercooling response of pollinator populations under the brood parasitism pressure has not been sufficiently investigated. (2) Methods: This study assessed the supercooling traits (supercooling points, fresh weight and fat content) of the solitary bee Osmia excavata Alfken and its brood parasite, Sapyga coma Yasumatsu & Sugihara. We measured 4035 samples (3025 O. excavata and 1010 S. coma, one individual as one sample) and discovered the supercooling traits relations between solitary bee and brood parasite. (3) Results: Significant differences in the supercooling points were found between O. excavata (females: −24.18 (−26.02~−20.07) vs. males: −23.21 (−25.15~−18.65) °C) and S. coma (females: −22.19 (−25.46~−18.38) vs. males: −20.65 (−23.85~−16.15) °C, p < 0.0001) in the same sex, and also between sexes of same species. The two species’ supercooling traits (supercooling points, fresh weight, and fat content) were significantly positively correlated. The supercooling points of the solitary bee varies regularly under brood parasitism pressure. (4) Conclusions: Our study indicates the supercooling traits relationships between a solitary bee and its brood parasite and suggests that the supercooling points of the solitary bee increase under the biological stress of its brood parasite in a certain level.
ISSN:2075-4450
2075-4450
DOI:10.3390/insects13030235