Spider odors induce stoichiometric changes in fruit fly <i>Drosophila melanogaster</i>

Krams, Ronalds; Krama, Tatjana; Munkevics, Māris; Eichler, Sarah E.; Butler, David M.; Dobkeviča, Linda; Jõers, Priit; Contreras‐Garduño, Jorge; Daukšte, Janīna; Krams, Indriķis

doi:10.1093/cz/zoaa070

Cited by 4 publications

(8 citation statements)

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“…Predation has been shown to have profound lethal and non-lethal ( Lima, 1998 ) impacts on prey individuals, affecting their behavior ( Hulthén et al, 2021 ), phenotype development ( Krams et al, 2020 ), fitness ( Zanette and Clinchy, 2020 ; Allen et al, 2022 ), population structure and evolution ( Yartsev, 2017 ; Dudeck et al, 2018 ). Prey individuals respond to predator acoustic, visual, chemical, and other cues, which improve the chances of prey to escape predator attacks ( Lima, 1998 ; Preisser et al, 2005 ; Peckarsky et al, 2008 ; Voelkl et al, 2016 ; Zanette et al, 2019 ; Krams R. et al, 2021 ). When developing under predation risk, prey individuals often grow smaller, more agile, less palatable, or more cryptic, conferring fitness benefits associated with a modified phenotype ( Krams et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Development under predation risk increases serotonin-signaling, variability of turning behavior and survival in adult fruit flies Drosophila melanogaster

Krama,

Munkevics,

Krams

et al. 2023

Front. Behav. Neurosci.

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The development of high-throughput behavioral assays, where numerous individual animals can be analyzed in various experimental conditions, has facilitated the study of animal personality. Previous research showed that isogenic Drosophila melanogaster flies exhibit striking individual non-heritable locomotor handedness. The variability of this trait, i.e., the predictability of left-right turn biases, varies across genotypes and under the influence of neural activity in specific circuits. This suggests that the brain can dynamically regulate the extent of animal personality. It has been recently shown that predators can induce changes in prey phenotypes via lethal or non-lethal effects affecting the serotonergic signaling system. In this study, we tested whether fruit flies grown with predators exhibit higher variability/lower predictability in their turning behavior and higher survival than those grown with no predators in their environment. We confirmed these predictions and found that both effects were blocked when flies were fed an inhibitor (αMW) of serotonin synthesis. The results of this study demonstrate a negative association between the unpredictability of turning behavior of fruit flies and the hunting success of their predators. We also show that the neurotransmitter serotonin controls predator-induced changes in the turning variability of fruit flies, regulating the dynamic control of behavioral predictability.

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Section: Introductionmentioning

confidence: 99%

Development under predation risk increases serotonin-signaling, variability of turning behavior and survival in adult fruit flies Drosophila melanogaster

Krama,

Munkevics,

Krams

et al. 2023

Front. Behav. Neurosci.

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“…Pollen was removed from the body or workers before we dried and weighed bumblebees. Individual bumblebees were homogenized and we obtained their whole body C and N mass percentage using the element analyzer EuroVector EA3000 (Eurovector Srl, Pavia, Italy) ( Krams et al, 2020 , 2021a ). Samples of C and N concentrations were measured for each bumblebee.…”

Section: Methodsmentioning

confidence: 99%

“…It is known that body elemental composition responds to environmental stress ( Sterner & Elser, 2002 ; Hawlena & Schmitz, 2010a ; Huang, Wang & Ren, 2019 ). Body carbon (C) and body nitrogen (N) concentrations follow to changes in environmental quality ( De Senerpont Domis et al, 2014 ; Janssens, Op de Beeck & Stoks, 2017 ), environmental stability ( Janssens, Van Dievel & Stoks, 2015a ; Schmitz, Rosenblatt & Smylie, 2016 ; Zhang et al, 2016 ), individual development-associated stress ( Trakimas et al, 2019 ; Krams et al, 2020 ), and the risk of predation ( Janssens, Van Dievel & Stoks, 2015b ; Van Dievel, Janssens & Stoks, 2016 ; Krams et al, 2016 ; Zhang et al, 2016 ; Krams et al, 2021a ). Stress is supposed to increase glucocorticosteroid release, which heightens the intensity of metabolism ( Slos & Stoks, 2008 ; Hawlena & Schmitz, 2010a , 2010b ; Krams et al, 2013a , 2013b ).…”

Section: Introductionmentioning

confidence: 99%

Physiological stress and higher reproductive success in bumblebees are both associated with intensive agriculture

Krama

Krams

Munkevics

et al. 2022

PeerJ

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Free-living organisms face multiple stressors in their habitats, and habitat quality often affects development and life history traits. Increasing pressures of agricultural intensification have been shown to influence diversity and abundance of insect pollinators, and it may affect their elemental composition as well. We compared reproductive success, body concentration of carbon (C) and nitrogen (N), and C/N ratio, each considered as indicators of stress, in the buff-tailed bumblebee (Bombus terrestris). Bumblebee hives were placed in oilseed rape fields and semi-natural old apple orchards. Flowering season in oilseed rape fields was longer than that in apple orchards. Reproductive output was significantly higher in oilseed rape fields than in apple orchards, while the C/N ratio of queens and workers, an indicator of physiological stress, was lower in apple orchards, where bumblebees had significantly higher body N concentration. We concluded that a more productive habitat, oilseed rape fields, offers bumblebees more opportunities to increase their fitness than a more natural habitat, old apple orchards, which was achieved at the expense of physiological stress, evidenced as a significantly higher C/N ratio observed in bumblebees inhabiting oilseed rape fields.

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“…The percentage of C and N content was measured from the mass of whole bees, using an element analyzer EuroVector EA3000 (Eurovector Srl, Pavia, Italy; Krams et al, 2020Krams et al, , 2021. Samples of C and N concentrations were measured for each ovipositing queen, while in samples of males, workers, and young queens we merged three individual bumblebees for each analyzed sample unit.…”

Section: Bumblebee Body C and N Contentmentioning

confidence: 99%

“…Ecological stoichiometry focuses on the interactions of organisms with their environments, analyzing how ecological and evolutionary factors shape their bodies' elemental composition (Sterner and Elser, 2002;Filipiak et al, 2017). Several environmental factors have the potential to influence the elemental composition of organisms, including pollution (De Senerpont Domis et al, 2014;Janssens et al, 2017), ambient temperature (Janssens et al, 2015;Zhang et al, 2016), developmental speed (Trakimas et al, 2019;Krams et al, 2020), and predation risk (Janssens et al, 2015;Krams et al, 2016Krams et al, , 2021Van Dievel et al, 2016;Zhang et al, 2016). The general stress paradigm states that exposure to stressors generally increases the production of steroid hormones (Hawlena and Schmitz, 2010a;Rinehart and Hawlena, 2020).…”

Section: Introductionmentioning

confidence: 99%

Ecological Stoichiometry of Bumblebee Castes, Sexes, and Age Groups

et al. 2021

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Ecological stoichiometry is important for revealing how the composition of chemical elements of organisms is influenced by their physiological functions and ecology. In this study, we investigated the elemental body composition of queens, workers, and males of the bumblebee Bombus terrestris, an important pollinator throughout Eurasia, North America, and northern Africa. Our results showed that body elemental content differs among B. terrestris castes. Young queens and workers had higher body nitrogen concentration than ovipositing queens and males, while castes did not differ significantly in their body carbon concentration. Furthermore, the carbon-to-nitrogen ratio was higher in ovipositing queens and males. We suggest that high body nitrogen concentration and low carbon-to-nitrogen ratio in young queens and workers may be related to their greater amount of flight muscles and flight activities than to their lower stress levels. To disentangle possible effects of stress in the agricultural landscape, further studies are needed to compare the elemental content of bumblebee bodies between natural habitats and areas of high-intensity agriculture.

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Spider odors induce stoichiometric changes in fruit fly Drosophila melanogaster

Cited by 4 publications

References 10 publications

Development under predation risk increases serotonin-signaling, variability of turning behavior and survival in adult fruit flies Drosophila melanogaster

Development under predation risk increases serotonin-signaling, variability of turning behavior and survival in adult fruit flies Drosophila melanogaster

Physiological stress and higher reproductive success in bumblebees are both associated with intensive agriculture

Ecological Stoichiometry of Bumblebee Castes, Sexes, and Age Groups

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