Evaluating Volatile Plant Compounds of <i>Psidium galapageium</i> (Myrtales: Myrtaceae) as Repellents Against Invasive Parasitic Diptera in the Galapagos Islands

Martina, Claudia; Krenn, Liselotte; Krupicka, L; Yamada, Hanano; Hood‐Nowotny, Rebecca; Lahuatte, Paola F.; Yar, J; Schwemhofer, Timo; Fischer, Barbara; Causton, Charlotte E.; Tebbich, Sabine

doi:10.1093/jme/tjab183

Cited by 2 publications

(1 citation statement)

References 42 publications

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“…Studies have shown that birds use natural and synthetic material to reduce parasite load (Clayton & Wolfe 1993;De Roode et al 2013). In the Galápagos, Cimadom et al (2016) observed that Darwin's nches treat their feathers with the leaves of the endemic Galápagos guava (Psidium galapageium), which, in the lab, inhibits the growth of vampire y larvae and repels adults (Martina et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Cigarette tobacco reduces the survival of an invasive parasite that affects Darwin’s finches

Pérez-Beauchamp,

Contreras,

Goldberg

et al. 2024

Biol Invasions

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Invasive parasites are a major threat to biodiversity worldwide, so understanding the factors that control them is necessary to improve the health of affected host species. In the Galápagos Islands, the invasive nest ectoparasite, the avian vampire y (Philornis downsi), is causing up to 100% mortality in nestling Darwin's nches. However, urban nch nests have fewer ies than non-urban nch nests. One explanation is that nches incorporate cigarette butts into their nests, which has been found to decrease nest parasite abundance for other bird species. For our study, we exposed larval ies to cigarette tobacco-treated (concentrated or diluted) or untreated cotton, then characterized pupation success, pupal deformities and success, and adult y eclosure success and size. The in uence of moisture on the effect of tobacco treatment on y health was also determined. Flies reared in tobacco as larvae had lower pupation success, larger pupal volume, and a higher prevalence of pupal deformities compared to control ies, regardless of moisture treatment. Furthermore, we found that tobacco-treated ies had lower eclosure success. In fact, very few tobacco-treated ies survived to adulthood. We also collected nch nests and quanti ed the prevalence and abundance of cigarette butts and abundance of ies in the nests. Although most urban nch nests contain cigarette butts (73%), the mass of cigarette butts was very low and did not correlate with y abundance. Compared to past studies, nch nests require ten times as many cigarette butts to affect y survival. Although tobacco can negatively affect vampire ies, nches likely do not incorporate enough cigarette butts to affect y tness.

show abstract

Section: Introductionmentioning

confidence: 99%

Cigarette tobacco reduces the survival of an invasive parasite that affects Darwin’s finches

Pérez-Beauchamp,

Contreras,

Goldberg

et al. 2024

Biol Invasions

View full text Add to dashboard Cite

show abstract

Cigarette tobacco reduces the survival of an invasive parasite that affects Darwin's finches

Pérez-Beauchamp,

Contreras,

Goldberg

et al. 2023

Preprint

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Invasive parasites are a major threat to biodiversity worldwide, so understanding the factors that control them is necessary to improve the health of affected host species. In the Galápagos Islands, the invasive nest ectoparasite, the avian vampire fly (Philornis downsi), is causing up to 100% mortality in nestling Darwin’s finches. However, urban finch nests have fewer flies than non-urban finch nests. One explanation is that finches incorporate cigarette butts into their nests, which has been found to decrease nest parasite abundance for other bird species. For our study, we exposed larval flies to cigarette tobacco-treated (concentrated or diluted) or untreated cotton, then characterized pupation success, pupal deformities and success, and adult fly eclosure success and size. The influence of moisture on the effect of tobacco treatment on fly health was also determined. Flies reared in tobacco as larvae had lower pupation success, larger pupal volume, and a higher prevalence of pupal deformities compared to control flies, regardless of moisture treatment. Furthermore, we found that tobacco-treated flies had lower eclosure success. In fact, very few tobacco-treated flies survived to adulthood. We also collected finch nests and quantified the prevalence and abundance of cigarette butts and abundance of flies in the nests. Although most urban finch nests contain cigarette butts (73%), the mass of cigarette butts was very low and did not correlate with fly abundance. Compared to past studies, finch nests require ten times as many cigarette butts to affect fly survival. Although tobacco can negatively affect vampire flies, finches likely do not incorporate enough cigarette butts to affect fly fitness.

show abstract

Evaluating Volatile Plant Compounds of Psidium galapageium (Myrtales: Myrtaceae) as Repellents Against Invasive Parasitic Diptera in the Galapagos Islands

Cited by 2 publications

References 42 publications

Cigarette tobacco reduces the survival of an invasive parasite that affects Darwin’s finches

Cigarette tobacco reduces the survival of an invasive parasite that affects Darwin’s finches

Cigarette tobacco reduces the survival of an invasive parasite that affects Darwin's finches

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