Gas exchange patterns in Platynus assimilis (Coleoptera: Carabidae): Respiratory failure induced by a pyrethroid

Kivimägi, Irja; Kuusik, Aare; Ploomi, Angela; Metspalu, L.; Jõgar, Katrin; Williams, I. H.; Sibul, Ivar; Hiiesaar, K.; Luik, Anne; Mänd, Marika

doi:10.14411/eje.2013.006

Cited by 9 publications

(9 citation statements)

References 61 publications

(57 reference statements)

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“…In the case of continuous respiration, the insects deplete their energy reserves before the end of hibernation. Continuous respiration allows also water vapour molecules to leave the body and thus the risk for desiccation is higher (Jõgar et al, 2004;Muljar et al, 2012;Kivimägi et al, 2013;Kuusik et al, 2016). Both factors might aid the rapid death of our Colorado potato beetles that do not use DGE.…”

Section: Discussionmentioning

confidence: 99%

Variability in metabolic rate and gas exchange patterns of the Colorado potato beetle of winter and prolonged diapauses

et al. 2018

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We compare standard metabolic rate (VCO2) and gas exchange patterns in the Colorado potato beetle (Leptinotarsa decemlineata Say) in winter diapause (i.e. lasting only one overwintering period) with those of beetles in prolonged diapause (i.e. diapause lasting 2 or 3 years). The length of diapause is estimated by the behaviour of the beetles: burrowing into soil as a sign of the beginning of diapause and emergence from the soil as the ending of diapause. Measurement with a flow‐through carbon dioxide (CO2) infrared gas analyzer reveals that most beetles in winter or prolonged diapause display distinct discontinuous gas exchange cycles at 23 °C. Beetles with cyclic gas exchange and continuous breathing do not survive the winter. Beetles in prolonged diapause are characterized by a three‐ to five‐fold lower standard metabolic rates, longer discontinuous gas exchange periods and shorter CO2 releases (open phase) than those in winter diapause.

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Section: Discussionmentioning

confidence: 99%

Variability in metabolic rate and gas exchange patterns of the Colorado potato beetle of winter and prolonged diapauses

et al. 2018

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“…Generally, higher levels of walking activity would be expected to result in higher metabolism and, consequently, a higher respiration rate. However, reductions in respiratory responses have been reported in arthropods that were sublethally exposed to pesticides [ 31 , 71 – 73 ] as a result of the impairment of oxidative phosphorylation processes [ 31 – 33 ].…”

Section: Discussionmentioning

confidence: 99%

Sexual Success after Stress? Imidacloprid-Induced Hormesis in Males of the Neotropical Stink Bug Euschistus heros

et al. 2016

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Environmental stress in newly-emerged adult insects can have dramatic consequences on their life traits (e.g., dispersion, survival and reproduction) as adults. For instance, insects sublethally exposed to environmental stressors (e.g., insecticides) can gain fitness benefits as a result of hormesis (i.e., benefits of low doses of compounds that would be toxic at higher doses). Here, we experimentally tested whether sublethal exposure to the insecticide imidacloprid would hormetically affect the sexual fitness of newly-emerged adults of the Neotropical brown stink bug Euschistus heros (Hemiptera: Heteroptera: Pentatomidae), which is the most abundant and prevalent insect pest in Neotropical soybean fields. We evaluated the sexual fitness of four couple combinations: unexposed couples, exposed females, exposed males, and exposed couples. Sublethal exposure to dry residues (i.e., contact) of imidacloprid (at 1% of recommended field rate) did not affect insect survival, but led to higher mating frequencies when at least one member of the couple was exposed. However, the average mating duration was shortened when only females were exposed to imidacloprid. Moreover, exposed males showed higher locomotory (walking) activity, lower respiration rates and induced higher fecundity rates when mated to unexposed females. Although the reproductive tracts of exposed males did not differ morphometrically from unexposed males, their accessory glands exhibited positive reactions for acidic and basic contents. Our findings suggest that males of the Neotropical brown stink bug hormetically increase their sexual fitness when cued by impending insecticidal stress in early adulthood.

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“…Elevated water losses may result from respiratory failures evoked by handling stress and sublethal doses of toxicant (Kestler, ; Sibul et al , ; Jõgar et al , ; Kivimägi et al , ). Even one defective spiracle can lead to high water loss and lethal desiccation (Sláma, ).…”

Section: Discussionmentioning

confidence: 99%

The length of discontinuous gas exchange cycles in lepidopteran pupae may serve as a mechanism for natural selection

et al. 2014

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Gas exchange is studied in diapausing pupae of Mamestra brassicae L., whose larvae are reared under identical conditions. The release of CO 2 gas is recorded with infrared gaseous analyzers. Oxygen convective uptake into the tracheae and oxygen consumption rates are recorded by means of a constant-volume coulometric respirometer. Outputs from both of these respirometry systems are combined with infrared actographs. All 3-month-old pupae of M. brassicae display a pattern of discontinuous gas exchange (DGE) cycles of CO 2 gas release by bursts, although the lengths of these cycles varies between individuals. Some pupae exhibit long DGE cycles of at least 20 h in duration, with negligible CO 2 gas release during interburst periods, and there is presumed to be a convective gas exchange at this time. As a result of a partial vacuum inside the tracheae, a large oxygen convective uptake always occurs at the start of the spiracular opening phase. Other pupae have short DGE cycles of less than 3 h in duration, with elevated CO 2 gas release during the interburst period, when gas exchange is predominantly diffusive. The spiracular open phase in these pupae consists of frequent separate convective bursts of CO 2 gas release, with the opening-closing rhythms of the spiracles, which are considered as O phase fluttering. The pupae with long DGE cycles exhibit extremely low metabolic rates and very low total water loss rates, whereas those with short DGE cycles have higher metabolic and total water loss rates. The pupae with long DGE cycles live approximately twice as long as those with short cycles; thus, the present study demonstrates that long DGE cycles confer a fitness benefit on pupae as a result of a lower metabolic rate associated with water economy, conferring on them a longer life.

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Gas exchange patterns in Platynus assimilis (Coleoptera: Carabidae): Respiratory failure induced by a pyrethroid

Cited by 9 publications

References 61 publications

Variability in metabolic rate and gas exchange patterns of the Colorado potato beetle of winter and prolonged diapauses

Variability in metabolic rate and gas exchange patterns of the Colorado potato beetle of winter and prolonged diapauses

Sexual Success after Stress? Imidacloprid-Induced Hormesis in Males of the Neotropical Stink Bug Euschistus heros

The length of discontinuous gas exchange cycles in lepidopteran pupae may serve as a mechanism for natural selection

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