Preen oil chemical composition in herring gull Larus argentatus, common gull Larus canus and black-headed gull Chroicocephalus ridibundus confirms their status as two separate genera

Fischer, Izabela; Meissner, Włodzimierz; Haliński, Łukasz P.; Stepnowski, Piotr

doi:10.1016/j.bse.2019.103987

Cited by 4 publications

(2 citation statements)

References 52 publications

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“…The weight of such a light coating of oil applied during preening does not impact the individual but does, however, provide the optimal level of oil for waterproofing. The structural properties probably differ between natural-based preen oils, composed of predominantly fatty acids and alcohol moieties, and the volatile liquid hydrocarbons of petroleum-based oils, with different compositions and viscosities fundamentally impacting the feathers' structural integrity [33,34]. Some clumping was recorded following water throughput in feathers not exposed to crude oil, though the extent of this was highly reduced in comparison with feathers that were exposed to oiling treatments.…”

Section: Discussionmentioning

confidence: 99%

Light to intermediate oil sheens increase Manx shearwater feather permeability

2022

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Oil pollution has profound negative impacts on the marine environment, with seabirds particularly vulnerable to oiling, due to the amount of time spent on the sea surface foraging or resting. Exposure to oil can affect feather structure and influence waterproofing, buoyancy and thermoregulation. We investigated the effects of surface crude oil on the feather structure of Manx shearwaters ( Puffinus puffinus ), a seabird species that spends a high proportion of time on the water surface. Sampled body contour feathers were exposed to varying thicknesses of surface crude oil before assessing their resistance to water permeation, increase in mass and clumping of feather barbules. Surface oil as thin as 0.1 µm was enough to increase feather permeability, while greatest impacts on permeability were caused by exposure to dark colour surface sheens 3 µm in thickness. Increases in feather mass of up to 1000% were noted in heavy oiling scenarios due to contact with thicker oil slicks, which may significantly affect wing loading and energetic expenditure.

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Section: Discussionmentioning

confidence: 99%

Light to intermediate oil sheens increase Manx shearwater feather permeability

2022

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“…According to MS library search (Wiley and Adams) and comparison of mass spectrum reported in the literature. The relative amounts of individual components (%) were determined using area percentage method relative to the total peak area from the GC-FID analysis [25][26], without using a correction factor…”

Section: Identification Of Volatile Compoundsmentioning

confidence: 99%

Chemical Constituents of the Volatile and Nonvolatile, Cytotoxic and Free Radical Scavenging Activities of Medicinal Plant: <i>Ranunculus millefoliatus</i> and <i>Acanthus dioscoridis</i>

Abdullah¹,

Hamah-Ameen²,

Dastan³

2021

Pol. J. Environ. Stud.

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In this first reported study, the hydrodistilled volatile oils from the fragrant aerial parts (Ranunculus millefoliatus) and leaves (Acanthus dioscoridis) were investigated by GC-MS and GC-FID. In total 78 constituents, 46 and 44 compounds representing 92.5 and 92.57% of the volatile oil were identified from A. dioscoridis and R. millefoliatus respectively. The main volatile constituents of ADL-Oils were caryophyllene oxide (3.1%), E -phytol acetate (3.6%), (E)-β-ionone (3.7%), spathulenol (8.8%), phytol (15.7%), palmitic acid (23.0%). The major compounds of RMA-Oils were palmitic acid (4.89%), (E)-nerolidol (6.89%), α-copaen-11-ol (11.96%), γ-eudesmol (12.84%) and α-eudesmol (35.98%). The RMA-oils and ADL-oils displayed the cytotoxicity with IC 50 12.28 and 15.44 µg/ml respectively. The antioxidant showed that the methanolic extract from RMA was stronger than ADL, with IC 50 values (54 and 118 µg/ml) respectively. Likewise, the antioxidant activity of RMA-oils was found to be stronger than ADL-oils (43 and 105 µg/ml) respectively, compared with BHT (IC 50 , 24 µg/ml), as a positive control.

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