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  • 1
    Online Resource
    Online Resource
    Hormonal pleiotropy helps maintain queen signal honesty in a highly eusocial wasp
    Springer Science and Business Media LLC ; 2017
    In:  Scientific Reports Vol. 7, No. 1 ( 2017-05-10)
    Details
    In: Scientific Reports, Springer Science and Business Media LLC, Vol. 7, No. 1 ( 2017-05-10)
    Abstract: In insect societies, both queens and workers produce chemicals that reliably signal caste membership and reproductive status. The mechanisms that help to maintain the honesty of such queen and fertility signals, however, remain poorly studied. Here we test if queen signal honesty could be based on the shared endocrine control of queen fertility and the production of specific signals. In support of this “hormonal pleiotropy” hypothesis, we find that in the common wasp, application of methoprene (a juveline hormone analogue) caused workers to acquire a queen-like cuticular hydrocarbon profile, resulting in the overproduction of known queen pheromones as well as some compounds typically linked to worker fertility. By contrast, administration of precocene-I (a JH inhibitor) had a tendency to have the opposite effect. Furthermore, a clear gonadotropic effect of JH in queens was suggested by the fact that circulating levels of JH were ca. 2 orders of magnitude higher in queens than those in workers and virgin, non-egg-laying queens, even if methoprene or precocene treatment did not affect the ovary development of workers. Overall, these results suggest that queen signal honesty in this system is maintained by queen fertility and queen signal production being under shared endocrine control.
    Type of Medium: Online Resource
    ISSN: 2045-2322
    URL: Article
    DOI: 10.1038/s41598-017-01794-1
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2017
    detail.hit.zdb_id: 2615211-3
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  • 2
    Online Resource
    Online Resource
    Foraging and Drifting Patterns of the Highly Eusocial Neotropical Stingless Bee Melipona fasciculata Assessed by Radio-Frequency Identification Tags
    Frontiers Media SA ; 2021
    In:  Frontiers in Ecology and Evolution Vol. 9 ( 2021-8-4)
    Details
    In: Frontiers in Ecology and Evolution, Frontiers Media SA, Vol. 9 ( 2021-8-4)
    Abstract: Bees play a key role in ecosystem services as the main pollinators of numerous flowering plants. Studying factors influencing their foraging behavior is relevant not only to understand their biology, but also how populations might respond to changes in their habitat and to the climate. Here, we used radio-frequency identification tags to monitor the foraging behavior of the neotropical stingless bee Melipona fasciculata with special interest in drifting patterns i.e., when a forager drifts into a foreign nest. In addition, we collected meteorological data to study how abiotic factors affect bees’ activity and behavior. Our results show that only 35% of bees never drifted to another hive nearby, and that factors such as temperature, humidity and solar irradiation affected the bees drifting rates and/or foraging activity. Moreover, we tested whether drifting levels would decrease after marking the nest entrances with different patterns. However, contrary to our predictions, there was an increase in the proportion of drifting, which could indicate factors other than orientation mistakes playing a role in this behavior. Overall, our results demonstrate how managed bee populations are affected by both nearby hives and climate factors, offering insights on their biology and potential commercial application as crop pollinators.
    Type of Medium: Online Resource
    ISSN: 2296-701X
    URL: Article
    DOI: 10.3389/fevo.2021.708178
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2745634-1
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  • 3
    Online Resource
    Online Resource
    Identification of a queen pheromone mediating the rearing of adult sexuals in the pharaoh ant Monomorium pharaonis
    The Royal Society ; 2020
    In:  Biology Letters Vol. 16, No. 8 ( 2020-08), p. 20200348-
    Details
    In: Biology Letters, The Royal Society, Vol. 16, No. 8 ( 2020-08), p. 20200348-
    Abstract: The division of labour between reproductive queens and mostly sterile workers is among the defining characteristics of social insects. Queen-produced chemical signals advertising her presence and fertility status, i.e. queen pheromones, are normally used to assert the queen's reproductive dominance in the colony. Most queen pheromones identified to date are chemicals that stop the daughter workers from reproducing. Nevertheless, it has long been suggested that queen pheromones could also regulate reproduction in different ways. In some multiple-queen ants with obligately sterile workers, for example—such as fire ants and pharaoh ants—queen pheromones are thought to regulate reproduction by inhibiting the rearing of new sexuals. Here, we identify the first such queen pheromone in the pharaoh ant Monomorium pharaonis and demonstrate its mode of action via bioassays with the pure biosynthesized compound. In particular, we show that the monocyclic diterpene neocembrene, which in different Monomorium species is produced solely by fertile, egg-laying queens, strongly inhibits the rearing of new sexuals (queens and males) and also exerts a weakly attractive ‘queen retinue’ effect on the workers. This is the first time that a queen pheromone with such a dual function has been identified in a social insect species with obligately sterile workers.
    Type of Medium: Online Resource
    ISSN: 1744-9561 , 1744-957X
    URL: Article
    DOI: 10.1098/rsbl.2020.0348
    Language: English
    Publisher: The Royal Society
    Publication Date: 2020
    detail.hit.zdb_id: 2103283-X
    SSG: 12
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  • 4
    Online Resource
    Online Resource
    Tragedy of the commons in Melipona bees revisited
    The Royal Society ; 2022
    In:  Biology Letters Vol. 18, No. 1 ( 2022-01)
    Details
    In: Biology Letters, The Royal Society, Vol. 18, No. 1 ( 2022-01)
    Abstract: Melipona stingless bees display a paradoxical overproduction of queens, which are later eliminated by nest-mate workers. Mechanistically, it was suggested that the monoterpenoid geraniol deposited into newly provisioned cells by adult bees would cause larvae to develop into queens in Melipona beecheii . This system could be evolutionarily stable if many of these new queens were to leave the nest and parasitize other genetically unrelated colonies nearby, as was shown to occur in a congeneric species . Here, we use microsatellite markers to test whether queen overproduction could be a strategy by which adult workers control the caste fate of the developing larvae to export copies of their own genes to the rest of the population via queen parasitism in M. beecheii . In addition, we re-examined whether artificially increasing the levels of geraniol indeed caused larvae to develop as queens rather than workers. Contrary to our prediction, we found no evidence for queen parasitism in M. beecheii and observed no effect of geraniol on the rearing of new queens. Together, these results support the original ‘tragedy of the commons' hypothesis for queen overproduction in Melipona bees, where individual larvae selfishly bias their development towards the queen pathway according to their best evolutionary interests.
    Type of Medium: Online Resource
    ISSN: 1744-957X
    URL: Article
    DOI: 10.1098/rsbl.2021.0498
    Language: English
    Publisher: The Royal Society
    Publication Date: 2022
    detail.hit.zdb_id: 2103283-X
    SSG: 12
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  • 5
    Online Resource
    Online Resource
    DataSheet_1.zip
    Frontiers Media SA ; 2024
    In:  Frontiers in Bee Science Vol. 2 ( 2024-2-9)
    Details
    In: Frontiers in Bee Science, Frontiers Media SA, Vol. 2 ( 2024-2-9)
    Abstract: Climate change is affecting wild populations worldwide, and assessing the impacts on these populations is essential for effective conservation planning. The integration of advanced analytical techniques holds promise in furnishing detailed, spatially explicit information on climate change impacts on wild populations, providing fine-grained metrics on current environmental quality levels and trends of changes induced by estimated climate change scenarios. Here, we propose a framework that integrates three advanced approaches aiming to designate the most representative zones for long-term monitoring, considering different scenarios of climate change: Species Distribution Modeling (SDM), Geospatial Principal Component Analysis (GPCA) and Generalized Procrustes Analysis (GPA). We tested our framework with a climatically sensible Neotropical stingless bee species as study case, Melipona (Melikerria) fasciculata Smith, 1854. We used the SDM to determine the climatically persistent suitable areas for species, i.e. areas where the climate is suitable for species today and in all future scenarios considered. By using a GPCA as a zoning approach, we sliced the persistent suitable area into belts based on the variability of extremes and averages of meaningful climate variables. Subsequently, we measured, analyzed, and described the climatic variability and trends (toward future changes) in each belt by applying GPA approach. Our results showed that the framework adds significant analytical advantages for priority area selection for population monitoring. Most importantly, it allows a robust discrimination of areas where climate change will exert greater-to-lower impacts on the species. We showed that our results provide superior geospatial design, qualification, and quantification of climate change effects than currently used SDM-only approaches. These improvements increase assertiveness and precision in determining priority areas, reflecting in better decision-making for conservation and restoration.
    Type of Medium: Online Resource
    ISSN: 2813-5911
    URL: Article
    URL: Article
    DOI: 10.3389/frbee.2024.1329844
    DOI: 10.3389/frbee.2024.1329844.s001
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2024
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  • 6
    Online Resource
    Online Resource
    Intraspecific worker parasitism in the common wasp, Vespula vulgaris
    Elsevier BV ; 2016
    In:  Animal Behaviour Vol. 113 ( 2016-03), p. 79-85
    Details
    In: Animal Behaviour, Elsevier BV, Vol. 113 ( 2016-03), p. 79-85
    Type of Medium: Online Resource
    ISSN: 0003-3472
    URL: Article
    DOI: 10.1016/j.anbehav.2015.12.025
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2016
    detail.hit.zdb_id: 1461112-0
    SSG: 12
    SSG: 5,2
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  • 7
    Online Resource
    Online Resource
    Fifteen shades of green: The evolution of Bufotes toads revisited
    Elsevier BV ; 2019
    In:  Molecular Phylogenetics and Evolution Vol. 141 ( 2019-12), p. 106615-
    Details
    In: Molecular Phylogenetics and Evolution, Elsevier BV, Vol. 141 ( 2019-12), p. 106615-
    Type of Medium: Online Resource
    ISSN: 1055-7903
    URL: Article
    DOI: 10.1016/j.ympev.2019.106615
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2019
    detail.hit.zdb_id: 1471402-4
    SSG: 12
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  • 8
    Online Resource
    Online Resource
    Evolution of self-organised division of labour driven by stigmergy in leaf-cutter ants
    Springer Science and Business Media LLC ; 2022
    In:  Scientific Reports Vol. 12, No. 1 ( 2022-12-20)
    Details
    In: Scientific Reports, Springer Science and Business Media LLC, Vol. 12, No. 1 ( 2022-12-20)
    Abstract: Social insects owe their widespread success to their ability to efficiently coordinate behaviour to carry out complex tasks. Several leaf-cutter ant species employ an advanced type of division of labour known as task partitioning, where the task of retrieving leaves is distributed between workers that cut and drop and those that collect the fallen leaves. It is not entirely clear how such highly coordinated behaviour can evolve, as it would seem to require the simultaneous mutations of multiple traits during the same generation. Here, we use an agent-based simulation model to show how task partitioning in leaf-cutter ants can gradually evolve by exploiting stigmergy (indirect coordination through the environment) through gravity (leaves falling from the treetop on the ground forming a cache). Our simple model allows independent variation in two core behavioural dimensions: the tendency to drop leaves and the tendency to pick up dropped leaves. Task partitioning readily evolves even under these minimal assumptions through adaptation to an arboreal environment where traveling up and down the tree is costly. Additionally, we analyse ant movement dynamics to demonstrate how the ants achieve efficient task allocation through task switching and negative feedback control.
    Type of Medium: Online Resource
    ISSN: 2045-2322
    URL: Article
    DOI: 10.1038/s41598-022-26324-6
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2615211-3
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  • 9
    Online Resource
    Online Resource
    Nestmate Recognition in Two Melipona Stingless Bee Species: The Effect of Cuticular Chemical Profiles and Colony Distance
    Springer Science and Business Media LLC ; 2024
    In:  Journal of Insect Behavior Vol. 37, No. 1 ( 2024-03), p. 106-120
    Details
    In: Journal of Insect Behavior, Springer Science and Business Media LLC, Vol. 37, No. 1 ( 2024-03), p. 106-120
    Type of Medium: Online Resource
    ISSN: 0892-7553 , 1572-8889
    URL: Article
    DOI: 10.1007/s10905-024-09852-z
    RVK:
    WA 15000
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2024
    detail.hit.zdb_id: 2016965-6
    SSG: 12
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  • 10
    Online Resource
    Online Resource
    The effect of forager loss on honeybee workers temporal polyethism and social network structure
    Springer Science and Business Media LLC ; 2023
    In:  Apidologie Vol. 54, No. 5 ( 2023-10)
    Details
    In: Apidologie, Springer Science and Business Media LLC, Vol. 54, No. 5 ( 2023-10)
    Abstract: The western honeybee Apis mellifera is perhaps the best-known example of an advanced eusocial species displaying temporal polyethism, a process in which workers perform different tasks in the colony as they age. Previous studies demonstrated that this temporal division of labour is not only regulated by the age of the bees but also by the proportion of workers performing the required tasks in the colony. As we progress through the Anthropocene, the Intergovernmental Panel on Climate Change predicted that a significant increase in both the frequency and intensity of severe weather events can be expected in the coming decades. Here, we performed a controlled interrupted time series experiment with the objective of quantifying the possible effects that these weather events might have in the honeybee colony dynamics. By simulating a significant loss of foragers in the colony, we observed that honeybee workers quickly replaced the missing foragers by accelerating their transition to a subsequent task and, in some cases, completely skipped several of the natural task transitions with respect to their age. In addition, we analysed how the colony social network structure is affected by the sudden loss of foragers. Indeed, our data show that honeybee colonies increased their network cohesion with workers having a higher number of interactions as well as becoming more closely connected to one another soon after the disturbance. Overall, our data shows that even when faced with a substantial perturbation, honeybees can respond swiftly in order to maintain colony homeostasis and likely increase their resilience against future perturbations.
    Type of Medium: Online Resource
    ISSN: 0044-8435 , 1297-9678
    URL: Article
    DOI: 10.1007/s13592-023-01030-y
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2005148-7
    SSG: 12
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