Monitoring bee populations: are eusocial bees attracted to different colours of pan trap than other bees?

Sircom, Julie; Jothi, Geena Arul; Pinksen, Jasmine

doi:10.1007/s10841-018-0071-y

Cited by 19 publications

(15 citation statements)

References 30 publications

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“…Several studies advocate the use of fluorescent stimuli due to the assumed higher rates of insect captures [ 14 , 17 , 21 , 62 ]. Although pan trapping with non-fluorescent traps has been used in several studies [ 16 , 41 ], it has rarely been considered whether the type of pan trap may bias the data collection of different insect orders due to the differences in colour processing among groups. We employed a combination of fluorescent and non-fluorescent pan trap stimuli and found that Hymenopteran insects have no significant preference for either the fluorescent or non-florescent pan traps.…”

Section: Discussionmentioning

confidence: 99%

“…To attempt to control for potential colour preference biases, previous studies have used differently coloured pan traps such as white, yellow, and blue, as perceived by human colour vision, to quantify the broad insect diversity potentially encountered in ecological settings [ 14 , 16 , 21 , 23 ]. These studies have typically used UV-fluorescent pan traps based on anecdotal evidence [ 39 , 40 ] that such stimuli collect more insects, although this factor of UV-fluorescence on insect capture rate has, only recently, been subject to formal testing [ 41 ].…”

Section: Introductionmentioning

confidence: 99%

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Fluorescent Pan Traps Affect the Capture Rate of Insect Orders in Different Ways

Shrestha

Garcia

Chua

et al. 2019

Insects

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To monitor and quantify the changes in pollinator communities over time, it is important to have robust survey techniques of insect populations. Pan traps allow for the assessment of the relative insect abundance in an environment and have been promoted by the Food and Agricultural Organization (FAO) as an efficient data collection methodology. It has been proposed that fluorescent pan traps are particularly useful, as it has been suggested that they capture high numbers of insects in an unbiased fashion. We use a simultaneous presentation of fluorescent and non-fluorescent pan trap colours to assess how flower-visiting insects of different orders respond to visual stimuli and reveal a significant interaction between trap fluorescence and captured insect type. In particular, Coleoptera (beetles) and Lepidoptera (butterflies and moths) were captured significantly more frequently by fluorescent traps, whilst Dipterans (flies) were captured significantly less frequently by this type of pan trap. Hymenopterans (bees and wasps) showed no significant difference in their preference for fluorescent or non-fluorescent traps. Our results reveal that the use of fluorescent pan traps may differently bias insect capture rates when compared to the typical experience of colour flower-visiting insects in natural environments. Correction factors may, therefore, be required for interpreting insect pan trap data collected with different methodologies.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fluorescent Pan Traps Affect the Capture Rate of Insect Orders in Different Ways

Shrestha

Garcia

Chua

et al. 2019

Insects

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“…For bees and natural enemies of insect pests, the ability to effectively assess and monitor their abundance and diversity, and potential effects of land use practices on them, is of vital importance. A variety of sampling methods is available, but these methods can be biased and vary widely in performance [6,7,8,9,10,11]. Some may provide absolute estimates of abundance (density, or numbers per unit area), but most provide relative estimates that are related to the sampling method being used (e.g., numbers per trap per day, numbers per hour of aerial netting, etc.).…”

Section: Introductionmentioning

confidence: 99%

A Review of Sampling and Monitoring Methods for Beneficial Arthropods in Agroecosystems

McCravy

2018

Insects

101

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Beneficial arthropods provide many important ecosystem services. In agroecosystems, pollination and control of crop pests provide benefits worth billions of dollars annually. Effective sampling and monitoring of these beneficial arthropods is essential for ensuring their short- and long-term viability and effectiveness. There are numerous methods available for sampling beneficial arthropods in a variety of habitats, and these methods can vary in efficiency and effectiveness. In this paper I review active and passive sampling methods for non-Apis bees and arthropod natural enemies of agricultural pests, including methods for sampling flying insects, arthropods on vegetation and in soil and litter environments, and estimation of predation and parasitism rates. Sample sizes, lethal sampling, and the potential usefulness of bycatch are also discussed.

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“…It is well-known that fl ower-visiting insects prefer particular colours, which is the reason why three different colours are normally used for pan-trapping (e.g. Kirk, 1984;Vrdoljak & Samways, 2012;Joshi et al, 2015;Moreira et al, 2016;Sircom et al, 2018). The underlying mechanism of colour preference seems to be due to fundamental differences in the visual processing of different insects (Shrestha et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Sampling of flower-visiting insects: Poor correspondence between the catches of colour pan-trap and sweep netting

Berglund¹,

Milberg²

2019

Eur. J. Entomol.

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Pollinating insects are important and therefore, it is important to be able to assess and monitor changes in their abundance. Consequently, it is essential that the methods used to collect data have some level of precision and are accurate. In the present study, two commonly used methods: colour pan-traps and sweep netting along transects, were compared. A total of 1775 specimens of 120 species of four insect families were caught in twelve clear-cuts in southern Sweden. Overall, Lepturinae (Cerambycidae; 5 species) and Cetoniidae (Scarabaeidae; 2) were trapped in larger numbers by pan-traps and Syrphidae (62) and Apoidea, both social (10) and solitary (41), by sweep netting. The catches of none of the above groups of insects by the two methods were correlated. These results show that the composition of catches of the two methods are very different, which has implications when choosing a method for sampling or monitoring and comparing and analysing published data.

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Monitoring bee populations: are eusocial bees attracted to different colours of pan trap than other bees?

Cited by 19 publications

References 30 publications

Fluorescent Pan Traps Affect the Capture Rate of Insect Orders in Different Ways

Fluorescent Pan Traps Affect the Capture Rate of Insect Orders in Different Ways

A Review of Sampling and Monitoring Methods for Beneficial Arthropods in Agroecosystems

Sampling of flower-visiting insects: Poor correspondence between the catches of colour pan-trap and sweep netting

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