Experimental validation of an electronic counting device to determine flight activity of honey bees (Apis mellifera L.)

Bermig, Sven; Odemer, Richard; Gombert, Alina Joana; Frommberger, Malte; Rosenquist, Ralf; Pistorius, Jens

doi:10.5073/jfk.2020.05.03

Cited by 8 publications

(13 citation statements)

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“…Interruption outside this timeout period is considered incorrect counting, which could provide the basis for an algorithm to correct data appropriately. Further consideration of this suggestion was provided recently by Pešovi c et al ( 2017), and it could benefit a correction algorithm that tries to work out so-called borderline cases such as erratic bee movement between sensors or bees getting stuck there somehow (Bermig et al, 2020).…”

Section: Infraredmentioning

confidence: 99%

“…Furthermore, another obvious disadvantage of optical sensors lies in the registration precision of bees entering or leaving the hives in batches where several bees enter or leave the hive one after another (Liu et al, 1990;Struye et al, 1994). As described by Struye et al (1994), algorithms are necessary to detect and clear data of this issue (see also Bermig et al, 2020). Another suggestion to solve this problem was to use capacitive sensors (Campbell et al, 2005;Rickli et al, 1989).…”

Section: Infraredmentioning

confidence: 99%

“…Therefore, a better understanding of the dynamics of pollinators other than honey bees could be promoted. Bermig et al (2020) describe a system called 'BeeCheck' in which seven capacitive sensors per corridor were implemented with an algorithm that provides a solution to the difficulties described above and by other authors, such as erratic bee movement in the corridor or bees coming into contact while moving through the gates (Rickli et al, 1989;Struye et al, 1994).…”

Section: Capacitive Sensorsmentioning

confidence: 99%

“…In addition, slow-moving bees or long stays in the corridor, and bees that are passing each other or running close behind each other can lead to erroneous measurements. Therefore, an algorithm is required to map the daily balance of incoming and outgoing bees as accurately as possible, factoring out these variations or borderline cases (Bermig et al, 2020).…”

Section: Capacitive Sensorsmentioning

confidence: 99%

“…Note that Trial total represents the total number of test trial observations during the experimental validation period. Bermig et al (2020) suggest using colonies of 5,000-10,000 bees to obtain flight traffic a human observer can handle. Moreover, they suggest evaluating 3-min videos at a 0.3 playing speed (slow motion)…”

Section: Visual Observationmentioning

confidence: 99%

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Approaches, challenges and recent advances in automated bee counting devices: A review

Odemer

2021

Annals of Applied Biology

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For nearly 100 years, electronic bee counters have been developed using various technologies to track the foraging activity of mostly honey bee colonies. These counters should enable remote monitoring of the hives without disturbing natural flight behavior while generating precise scientific data. Today, however, there are not many counters on the market, that are able to fulfill this task. One main challenge is the lack of standardized methods to validate a counter's precision, but validation is crucial to categorize and judge the data produced by the counter, especially for scientific purposes. Another challenge is the interpretation of flight data to measure the effects of environmental or anthropogenic sources. Nevertheless, recent developments in the field are promising. This review describes the historic development of automated bee flight measurement and critically compares validation methods to encourage their improvement. Lastly, to increase the comparability of future analyses with bee counters, current advances in data interpretation are also presented.

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Section: Infraredmentioning

confidence: 99%

Section: Infraredmentioning

confidence: 99%

Section: Capacitive Sensorsmentioning

confidence: 99%

Section: Capacitive Sensorsmentioning

confidence: 99%

Section: Visual Observationmentioning

confidence: 99%

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Approaches, challenges and recent advances in automated bee counting devices: A review

Odemer

2021

Annals of Applied Biology

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A comparison of machine-learning assisted optical and thermal camera systems for beehive activity counting

Williams

Bariselli

Palego

et al. 2022

Smart Agricultural Technology

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Chronic high glyphosate exposure delays individual worker bee (Apis melliferaL.) development under field conditions

Odemer

Alkassab

Bischoff

et al. 2020

Preprint

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The ongoing debate about glyphosate-based herbicides (GBH) and their implications for beneficial arthropods give rise to controversy. This research was carried out to cover possible sublethal GBH effects on brood and colony development, adult survival, and overwintering success of honey bees (Apis mellifera L.) under field conditions. Residues in bee relevant matrices such as nectar, pollen and plants were measured in addition. To address these questions, we adopted four independent study approaches. For brood effects and survival, we orally exposed mini-hives housed in the "Kieler mating-nuc" system to sublethal concentrations of 4.8 mg glyphosate/kg (T1, low) and 137.6 mg glyphosate/kg (T2, high) over the period of one brood cycle (21 days). Brood development and colony conditions were assessed after a modified OECD method (No. 75). For adult survival, we weighed and labeled freshly emerged workers from exposed colonies and introduced them into non-contaminated mini-hives to monitor life span for 25 consecutive days. Results from these experiments showed a trivial effect of GBH on colony conditions and survival of individual workers, even though hatching weight was reduced in T2. The brood termination rate (BTR) in the T2 treatment, however, was more than doubled (49.84%) when compared to the control (22.11%) or T1 (20.69%). This was surprising as T2 colonies gained similar weight and similar numbers of bees per colony compared to the control, indicating equal performance. Obviously, the brood development in T2 was not "terminated" as expected by the OECD method terminology but rather "slowed down" for an unknown period of time. In light of these findings, we suggest that chronic high GBH exposure is capable of delaying worker brood development to a significant extent while no further detrimental effects seem to appear at the colony level. Against this background, we discuss additional results and possible consequences of GBH for honey bee health.

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Experimental validation of an electronic counting device to determine flight activity of honey bees (Apis mellifera L.)

Cited by 8 publications

References 0 publications

Approaches, challenges and recent advances in automated bee counting devices: A review

Approaches, challenges and recent advances in automated bee counting devices: A review

A comparison of machine-learning assisted optical and thermal camera systems for beehive activity counting

Chronic high glyphosate exposure delays individual worker bee (Apis melliferaL.) development under field conditions

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