Automated monitoring and quantitative analysis of feeding behaviour in Drosophila
Itskov PM, Moreira JM, Vinnik E, Lopes G, Safarik S, Dickinson MH, Ribeiro C
Easy Behavior technology is built on peer-reviewed science. Our products have contributed to research published in leading journals and cited thousands of times.
The foundational flyPAD and optoPAD methods papers, plus key work from our founder.
Itskov PM, Moreira JM, Vinnik E, Lopes G, Safarik S, Dickinson MH, Ribeiro C
Moreira JM, Itskov PM, Goldschmidt D, Baltazar C, Steck K, Tastekin I, Walker SJ, Ribeiro C
Lopes G, Bonacchi N, Frazão J, Neto JP, Atallah BV, Soares S, Moreira L, Matias S, Itskov PM, et al.
Itskov PM, Ribeiro C
Moulin TC, Covill LE, Itskov PM, Williams MJ, Schiöth HB
Öst A, Lempradl A, Casas E, Weigert M, Tiko T, Deniz M, Pantano L, Boenisch U, Itskov PM, et al.
74 peer-reviewed papers and preprints that used flyPAD or optoPAD in their methods. Each entry links to the source.
Moulin TC, Aldavero-Muñoz I, Williams MJ, Schiöth HB
“Feeding behavior was quantified using the FlyPad system, a capacitive-based platform that records proboscis-food interactions [36].”
Francés R, Comyn T, Desnous C, Bettoni F, Pavlowsky A, Préat T, Plaçais P
“The food-choice assay was done using FlyPAD 44 according to the manufacturer's instructions.”
Jahan I, Holvoet H, Backer JD, Kadow ICG
“Here, we used a closed-loop optogenetic paradigm to test how aging affects operant learning and the role of dopaminergic neurons (DANs; PPL1 and PAM) in this process.”
Silva B, Tsakani E, Kontopoulos A, De J, Gaspar P, Hiridjee A, Rosselli C, Juan-Sanz JD, Campusano J, Treiber CD, et al.
“FlyPAD assays were performed as previously described 1,17,74 .”
Karki A, Luker HA, Potlapalli NNR, Holguín FO, Berwal M, Pietrantonio PV, Hansen IA
“We used the flyPAD feeding system that was originally developed for Drosophila melanogaster and later adapted to study mosquito feeding behavior [29,30].”
Savaş D, Okoro AM, Moșneanu RA, Crown AM, Chang Z, Siegel R, Sorkaç A, Zandawala M, Barnea G
“We then show that SELKs affect bitter avoidance through LK release and food intake in an acetylcholine-dependent manner.”
Sato T, Toyama R, Kitamoto T, Sakai T
“After a 23-h fasting period, feeding activity (number and duration of sips) was monitored for 1 h after 1-h SS stress.”
Petsakou A, Filine E, Li M, Chen Y, Zheng A, Perrimon N
“To test this, we used the FlyPAD to conduct a two-choice behavioral assay for the two main macronutrients in the fly's diet, protein and sugar (yeast vs sugar preference assay).”
Moulin TC, Williams MJ, Schiöth HB
“The primary outcome measure was the number of sips, defined as a single proboscis-food interaction, which is shown to correlate with food intake volume.”
Collins NJ, Endres MN, Sinakevitch IT, Shao L
“Here, we describe a detailed protocol for performing consumption and dietary choice assays in Drosophila using the flyPAD/optoPAD system.”
McCracken AW, White N, Tanianis-Hughes J, Rosca E, Gill T, McKinney L, Simpson SJ, Reinhardt K, Brankatschk M, Piper MDW, et al.
“We first measured dietary consumption using a Flypad automatic sip detection system (31).”
Ahrentløv N, Kubrak O, Lassen M, Malita A, Koyama T, Frederiksen AS, Sigvardsen CM, John A, Madsen PSMSM, Halberg KA, et al.
“1-h feeding behaviour (‘sips’) was recorded using the flyPAD apparatus 26 .”
Backer JD, Karges T, Papst J, Pınar ZN, Coman C, Ahrends R, Xu Y, García‐Cáceres C, Kadow ICG
“In food-deprived flies, astrocyte-like and perineurial glia promote foraging and feeding, respectively, while cortex glia suppress these behaviors.”
Bertolini E, Münch D, Pascual J, Sgammeglia N, Bruzzone M, Ribeiro C, Auer TO
“We next analysed taste-driven noni preference in three binary choice assays, a 72-well plate assay, a petri dish group assay and the fly-PAD (on single flies), comparing grape and noni juice.”
Tastekin I, Vicente IDH, Beresford RJ, Otto N, Dempsey G, Waddell S, Ribeiro C
“flyPAD assays: Feeding microstructure was monitored using flyPAD as described in Itskov et al. Female flies ... were placed in an arena with two electrode pairs (channels) filled with food patches.”
Lozada-Perdomo FV, Chen Y, Jacobs RV, Yeo J, Yang M, Bhalerao J, Devineni AV
“Detailed information regarding the design of the optoPAD and data processing methods can be found in Moreira et al. and Itskov et al. Briefly, each fly was placed in a 3 cm diameter circular arena with two feeding sensors on the floor.”
Abdelhafiz I, Kessel T, Vilcinskas A, Lee K
“To assess the impact of viral infection on feeding behavior, we employed the flyPAD (fly Proboscis and Activity Detector) system, an automated high-resolution behavioral monitoring tool... in Drosophila [24].”
Lozada-Perdomo FV, Chen Y, Jacobs RV, Yeo J, Yang M, Bhalerao J, Devineni AV
“activating the entire population of reward-encoding DANs in Drosophila drives innate aversion in multiple behavioral assays, including feeding, locomotion, and spatial preference”
Christie KW, Dadyala TS, Sinakevitch I, Ito M, Shao L
“Acute feeding behavior was quantified by use of the FlyPad behavioral monitoring system (Itskov et al. 2014), at 25°C, 50%-60% relative humidity.”
Yoshinari Y, Nishimura T, Yoshii T, Kondo S, Tanimoto H, Kobayashi T, Matsuyama M, Niwa R
“FlyPAD assays were performed according to a previously described method.”
Liu CF, Tian N, Chang PW, Zhang W
“The sips' signal was analyzed using MATLAB and calculated as described in a previous study 55.”
Çoban B, Poppinga H, Rachad EY, Geurten BRH, Vasmer D, Jimenez FJR, Gadgil YV, Deimel SH, Alyagor I, Schuldiner O, et al.
“Five microliters of 1 M sucrose...were placed in wells of the FlyPad...to detect the capacitance change when the flies physically interacted with the food. The flies were transferred to the FlyPad individually using a pump.”
Rewitz K, Ahrentløv N, Kubrak O, Malita A, Koyama T, John A, Madsen PSMSM, Halberg KA, Nagy S, Texada MJ
“The flyPAD apparatus was also used for sugar and yeast feeding in a two-choice behavioral assay... was loaded into the food pedestals of each flyPAD. Flies were...transferred into the flyPAD behavioral arenas.”
Monteith KM, Thornhill P, Vale PF
“Using the FlyPAD system, we tracked the feeding choice that flies made between substrates that were either clean or contained a bacterial pathogen.”
Guillemin J, Li V, Davis G, Audette K, Li J, Jelen M, McDowell SA, Slamani S, Kelliher L, Gordon MD, et al.
“This was achieved by using either the opto-lid FlyPad system (STROBE) 34,37 or the opto-lid FLIC system 35,36 over two hours.”
Gera J, Agard M, Nave H, Baldridge AB, Sajadi F, Thorat L, McKim TH, Kondo S, Nässel DR, Omar MH, et al.
“flyPAD (Itskov et al., 2014) was used to calculate the number of feeding bouts over 24 hours as well as preference between sucrose versus yeast. Individual flies were mouth-pipetted to a flyPAD unit.”
Gera J, Agard M, Nave H, Baldridge AB, Sajadi F, Thorat L, McKim TH, Kondo S, Nässel DR, Omar MH, et al.
“flyPAD (Itskov et al., 2014) was used to calculate the number of feeding bouts over 24 hr as well as preference between sucrose versus yeast. Individual flies were mouth-pipetted to a flyPAD unit.”
Mollá-Albaladejo R, Jiménez-Caballero M, Sánchez‐Alcañiz JA
“flyPAD assays were performed to study the feeding microstructure in a two-choice feeding paradigm as described previously (Itskov et al., 2014), and several feeding parameters were measured individually in a high-throughput manner.”
Monteith KM, Thornhill P, Vale PF
“We designed a two-choice feeding assay using the FlyPAD system for tracking, recording, and analysing the feeding behaviour of fruit flies in real-time [42].”
Backer JD, Karges T, Papst J, Coman C, Ahrends R, Xu Y, García‐Cáceres C, Kadow ICG
“We optogenetically activated glial cells on the FlyPAD when the fly's proboscis contacted the drop of sucrose (Figure 5C).”
Ezra-Nevo G, Henriques SF, Münch D, Francisco AP, Baltazar C, Elias AP, Deplancke B, Ribeiro C
“Food choice experiments were done using flyPAD as described in 118.”
Niwa R, Yoshinari Y, Nishimura T, Yoshii T, Kondo S, Tanimoto H, Kobayashi T, Matsuyama M
“FlyPAD assays were performed according to previously described method. A single fly starved in 1% agar for 16 h was placed in an arena with either 5% sucrose or 2.5% yeast autolysate solution.”
Sato T, Toyama R, Kitamoto T, Sakai T
“Using an automatic feeding monitoring system, FlyPAD, we measured the number of sips and sip duration in individual males... the 1 h feeding behavior of males was monitored using FlyPAD.”
Goldschmidt D, Tastekin I, Münch D, Park J, Haberkern H, Serra L, Baltazar C, Jayaraman V, Rubin GM, Ribeiro C
“The absence of a change in overall food intake was further corroborated by using the flyPAD assay (Itskov et al., 2014), which directly measures the total amount of feeding.”
Deere JU, Sarkissian AA, Yang M, Uttley H, Santana NM, Nguyen L, Ravi K, Devineni AV
“To examine more naturalistic feeding behavior in freely moving flies over a longer time period, we used the optoPAD assay (Moreira et al., 2019). The optoPAD was purchased from Pavel Itskov at Easy Behavior.”
Zhou F, Tichy A, Imambocus BN, Sakharwade S, Jiménez F, Martínez MG, Jahan I, Habib M, Wilhelmy N, Burre V, et al.
“5 ul of 10% sucrose ... were placed in wells of the flyPAD ... For the optoPAD experiments, flies were ... supplemented with all-trans-retinal ... a closed-loop system to stimulate flies during feeding.”
Henriques‐Santos BM, Xiong C, Pietrantonio PV
“For the behavioral experiments, the flyPAD automated monitoring system of feeding behavior developed for adult Drosophila flies 43 was adapted for female mosquitoes (Fig.”
Banu A, Gowda SBM, Salim S, Mohammad F
“We used the FlyPAD, a capacitance-based system, to measure fly-feeding behavior in a detailed, high-throughput manner (Itskov et al., 2014).”
Yu J, Guo X, Shen Z, Zhang W
“We then validated these findings by using an automatic feeding monitoring system (FlyPAD) [26] to quantify the total duration of the fly sip within 20 minutes.”
Zhou F, Tichy A, Imambocus BN, Jiménez F, Martínez MG, Jahan I, Habib M, Wilhelmy N, Bräuler V, Lömker T, et al.
“We chose an optoPAD setup which allows operant optogenetic stimulation of flies during feeding using a closed-loop system.”
Malita A, Kubrak O, Koyama T, Ahrentløv N, Texada MJ, Nagy S, Halberg KA, Rewitz K
“we used a second automated behaviour-monitoring apparatus, the flyPAD 28 , to measure feeding preference in a two-choice assay.”
Masuzzo A, Manière G, Grosjean Y, Kurz CL, Royet J
“Two-choice feeding assays were performed by using the flyPAD device (Itskov et al., 2014), which records the cumulative number of sips.”
Masson F, Rommelaere S, Schüpfer F, Boquete J, Lemaître B
“We assessed the impact of MSRO infection on fly feeding behavior with a FlyPad (18).”
Call TB, Davis EK, Bean JD, Lemmon SG, Chaston JM
“We measured dietary preference of individual 4- to 6-day-old female flies using flyPAD arenas (6).”
Francisco AP, Tastekin I, Fernandes AB, Ezra-Nevo G, Deplancke B, Oliveira‐Maia AJ, Gontijo AM, Ribeiro C
“we decided to test for phenotypes in feeding behavior and food choice using the flyPAD technology, a capacitance-based setup for testing independent changes in protein and carbohydrate feeding (Itskov et al., 2014).”
Deere JU, Sarkissian AA, Yang M, Uttley H, Santana NM, Nguyen L, Ravi K, Devineni AV
“To examine more naturalistic feeding behavior in freely moving flies over a longer time period, we used the optoPAD assay (Moreira et al., 2019).”
Musso P, Junca P, Gordon MD
“Together, our results demonstrate how a three-layer neural circuit links the detection of two sugars to produce precise satiety-dependent control of feeding behavior.”
Galenza A, Foley E
“To measure feeding frequency, we used the flyPAD (Itskov et al., 2014) to count individual sips; bursts, which are clusters of sips; and bouts, which are clusters of bursts.”
Münch D, Goldschmidt D, Ribeiro C
“we used thermogenetic activation of the labeled neurons in combination with the flyPAD feeding assay (Itskov et al., 2014).”
Liu W, Cao H, Kimari M, Maronitis G, Williams MJ, Schiöth HB
“We performed FlyPAD experiments using starved flies... To do this, we employed the Fly Proboscis and Activity Detector (flyPAD). The flyPAD enables real-time recording of food intake and feeding behavior with a high temporal resolution.”
Junca P, Stanley M, Musso P, Gordon MD
“FlyPAD assays were performed similarly to those previously described. Flies were individually transferred to flyPAD arenas by mouth aspiration and allowed to feed for one hour at 25C, 70% RH. FlyPAD data were acquired using the Bonsai framework.”
Musso P, Junca P, Gordon MD
“we silenced them and measured feeding using a modified version of FlyPAD where food interactions were calculated using the algorithm we developed for the STROBE (Figure 2B-C) (Itskov et al., 2014; Jaeger et al., 2018; Musso et al., 2019).”
Masuzzo A, Manière G, Grosjean Y, Kurz CL, Royet J
“Two-choice feeding assays were performed by using the flyPAD device which records the cumulative number of sips. Each sip corresponds to a contact of flies' proboscis with the chosen food substrate.”
Henriques SF, Dhakan DB, Serra L, Francisco AP, Carvalho-Santos Z, Baltazar C, Elias AP, Anjos M, Zhang T, Maddocks OD, et al.
“Lactate is also necessary and sufficient for Ap to alter the fly's protein appetite.”
Hadjieconomou D, King GA, Gaspar P, Mineo A, Blackie L, Ameku T, Studd C, Mendoza AD, Diao F, White BH, et al.
“Food intake and feeding behaviour assays - FlyPAD: FlyPAD assays were performed as described in ref. 37. ... flies were individually transferred to flyPAD arenas by mouth aspiration and allowed to feed for 1h.”
Wang P, Jia Y, Liu T, Jan YN, Zhang W
“To avoid the influence on feeding by manual handling, we used an automatic feeding monitoring system (FlyPAD) (Itskov et al., 2014) to quantify the total sip duration of the flies within 20 min.”
Kobler JM, Jiménez F, Petcu I, Kadow ICG
“we tested different feeding choices involving harmless and pathogenic bacterial strains in two-choice feeding assays: a slightly modified version of the CAFE (STAR Methods) and the flyPAD.”
Williams MJ, Akram M, Barkauskaite D, Patil S, Kotsidou E, Kheder S, Vitale G, Filaferro M, Blemings SW, Maestri G, et al.
“The feeding experiments for preference testing were performed using the flyPAD (35).”
Moulin TC, Ferro F, Berkins S, Hoyer A, Williams MJ, Schiöth HB
“To assess feeding behavior, we used the FlyPad, a recently-developed equipment based on the proboscis interaction with the food [23].”
Pauls D, Selcho M, Räderscheidt J, Amatobi KM, Fekete G, Krischke M, Hermann-Luibl C, Ünal AG, Ehmann N, Itskov PM, et al.
“To directly address food uptake, we used an automated two-choice flyPAD assay and monitored feeding in individual flies on 5mM sucrose.”
Mahishi D, Triphan T, Hesse R, Huetteroth W
“flyPAD Food sip measurements were performed on the flyPAD (Itskov et al., 2014).”
Hudry B, Goeij ED, Mineo A, Gaspar P, Hadjieconomou D, Studd C, Mokochinski JB, Kramer H, Plaçais P, Préat T, et al.
“Using flyPAD to monitor feeding behavior in freely behaving flies (Itskov et al., 2014), we observed that reduced JAK-STAT signaling in male ECs resulted in reduced food intake.”
Shin M, Ferguson M, Willms RJ, Jones LO, Petkau K, Foley E
“Drosophila feeding behavior was monitored for 1 hour on the FlyPad as described previously (66).”
Henriques SF, Serra L, Francisco AP, Carvalho-Santos Z, Baltazar C, Elias AP, Anjos M, Zhang T, Maddocks OD, Ribeiro C
“Food choice experiments were performed using the flyPAD as described in (Itskov et al., 2014).”
Carvalho-Santos Z, Cardoso-Figueiredo R, Elias AP, Ribeiro C
“We tested these females for sugar appetite phenotypes using the flyPAD technology (Itskov et al., 2014).”
Sánchez‐Alcañiz JA, Silbering AF, Croset V, Zappia G, Sivasubramaniam AK, Abuin L, Sahai SY, Münch D, Steck K, Auer TO, et al.
“flyPAD assays were performed using only one well of the arena per assay.”
Steck K, Walker SJ, Itskov PM, Baltazar C, Moreira JM, Ribeiro C
Moreira J, Itskov PM, Goldschmidt D, Steck K, Walker SJ, Ribeiro C
“optoPAD assays were performed following a protocol previously described (Itskov et al., 2014).”
Musso P, Junca P, Jelen M, Feldman-Kiss D, Zhang H, Chan RC, Gordon MD
“The hardware, with the exception of the lighting circuit units, is based on the FlyPAD design (Itskov et al., 2014).”
Leitão-Gonçalves R, Carvalho-Santos Z, Francisco AP, Fioreze GT, Anjos M, Baltazar C, Elias AP, Itskov PM, Piper MDW, Ribeiro C
“We show that in Drosophila melanogaster, essential amino acids (eAAs) and the concerted action of the commensal bacteria Acetobacter pomorum and Lactobacilli are critical modulators of food choice.”
Piper MDW, Soultoukis GA, Blanc E, Mesaros A, Herbert SL, Juricic P, He X, Atanassov I, Salmonowicz H, Yang M, et al.
“Mated adult flies were then maintained on either holidic or yeast-based medium for the pretreatment period (3 days) and assayed using flyPAD, as described in Itskov et al. (2014).”
Carvalho-Santos Z, Ribeiro C
“we also tested these flies for alterations in food choice using the flyPAD technology, which allows for the automatic and quantitative survey of the feeding interactions of single flies with two different nutrient sources (Itskov et al., 2014).”
Steck K, Walker SJ, Itskov PM, Baltazar C, Ribeiro C
“flyPAD assays were performed based on a protocol previously described. One well of the flyPAD was filled with 20 mM sucrose, and the other with 10% yeast... Flies were individually transferred to flyPAD arenas by mouth aspiration.”
Corrales-Carvajal VM, Faisal AA, Ribeiro C
“To precisely measure the feeding behavior of flies with different internal states, we used the flyPAD technology, which allowed us to decompose the feeding motor pattern into "sips".”
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