Top 10 Biorxiv Papers Today in Animal Behavior And Cognition


2.012 Mikeys
#1. Portion size does not influence food consumption in rats
Fabien Naneix, Sophie C Pinder, Megan Y Summers, Renee M Rouleau, Eric Robinson, Kevin P Myers, James E McCutcheon
In studies of eating behavior that have been conducted in humans, the tendency to consume more when given larger portions of food, known as the portion size effect (PSE), is one of the most robust and widely replicated findings. Despite this, the mechanisms that underpin it are still unknown. In particular, it is unclear whether the PSE arises from higher-order social and cognitive processes that are unique to humans or, instead, reflects more fundamental processes that drive feeding, such as conditioned food-seeking. Importantly, studies in rodents and other animals have yet to show convincing evidence of a PSE. In this series of studies, we used several methods to test for a PSE in adult male Sprague-Dawley rats. Our approaches included using visually identifiable portions of a palatable food; training on a plate cleaning procedure; providing portion sizes of food pellets that were signaled by auditory and visual food-predictive cues; providing food with amorphous shape properties; and providing standard chow diet portions in...
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PavelProsselkov: Wrong rats: "...PSE (portion size effect) does not appear to be present in rats or, if it is, it is more nuanced, dependent on experimental procedure and/or smaller in size than it is in humans" https://t.co/MaHpH2LnHX
FabNaneix: The last #bioRxiv #preprint from @jaimemcc team (and my 1st paper since I joined the lab) we sent yesterday to Physiol. Behav. Purely behavioural study of the portion size effect on rats https://t.co/R3Advcgssi
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Repository: 3dprints
User: mccutcheonlab
Language: OpenSCAD
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Sample Sizes : [8]
Authors: 7
Total Words: 6744
Unqiue Words: 1930

1.998 Mikeys
#2. Persistent effects of the orexin-1 receptor antagonist SB-334867 on motivation for the fast acting opioid remifentanil
Aida Mohammadkhani, Morgan James, Gary Aston-Jones
The orexin (hypocretin) system is important for reward-seeking behavior. The orexin-1 receptor (Ox1R) antagonist SB334867 (SB) reduces seeking of food and drug reward under conditions of high motivation. There is some evidence that the effects of systemic SB on reward seeking persist beyond the pharmacological availability of the drug, however the time course of these effects is not well characterized, nor is it known whether similar persistent effects are observed following intraparenchymal injections. Here, we used a behavioral economics paradigm, which allows for repeated testing of drug motivation across consecutive days, to examine the persistent effects of acute systemic and local treatment with SB on motivation for the short-acting opioid remifentanil. Systemic injections of SB immediately prior to behavioral testing reduced motivation for remifentanil; this effect was sustained on a subsequent test at 24h, but not on a third test at 48h. When injected locally into caudal ventral pallidum (cVP) the effects of SB were more...
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biorxivpreprint: Persistent effects of the orexin-1 receptor antagonist SB-334867 on motivation for the fast acting opioid remifentanil https://t.co/8RvWz2XWn0 #bioRxiv
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Sample Sizes : [10, 14, 11]
Authors: 3
Total Words: 9716
Unqiue Words: 2808

1.998 Mikeys
#3. Fear contagion in zebrafish: a behaviour affected by familiarity
Priscila Fernandes da Silva, Carlos Garcia de Leaniz, Ana Carolina Luchiari
Emotional contagion has recently been described in fish but whether it is affected by familiarity is not known. We tested whether the sight of a distressed conspecific elicited fear in zebrafish, and whether this was modulated by familiarity. Groups of six zebrafish were housed together in the same tanks for 7 days to create familiar conditions. The behaviour of individual fish was then recorded in paired tanks within sight of either a familiar or an unfamiliar individual, before and after distilled water or an alarm substance was added to the demonstrator, but not to the observer. As expected, addition of distilled water did not elicit any behavioural change in either the demonstrator or the observer. However, addition of an alarm cue triggered anti-predatory behaviours in the demonstrator which caused the expression of anti-predatory behaviours in the observer, suggesting the existence of fear contagion. Furthermore, the extent of fear contagion was affected by familiarity, and observers were more active, swam closer to the...
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biorxivpreprint: Fear contagion in zebrafish: a behaviour affected by familiarity https://t.co/ulI9oe26j7 #bioRxiv
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Sample Sizes : None.
Authors: 3
Total Words: 7164
Unqiue Words: 2527

1.998 Mikeys
#4. Excessive deliberation in social anxiety
Lindsay E Hunter, Elana A Meer, Claire M Gillan, Ming Hsu, Nathaniel D Daw
A goal of computational psychiatry is to ground symptoms in more fundamental computational mechanisms. Theory suggests that rumination and other symptoms in mood disorders reflect dysregulated mental simulation, a process that normally serves to evaluate candidate actions. If so, these covert symptoms should have observable consequences: excessively deliberative choices, specifically about options related to the content of rumination. In two large general population samples, we examined how symptoms of social anxiety disorder (SAD) predict choices in a socially framed reinforcement learning task, the Patent Race game. Using a computational learning model to assess learning strategy, we found that self-reported social anxiety was indeed associated with an increase in deliberative evaluation. The effect was specific to learning from a particular ("upward counterfactual") subset of feedback, broadly matching the biased content of rumination in SAD. It was also robust to controlling for other psychiatric symptoms. These results ground...
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biorxivpreprint: Excessive deliberation in social anxiety https://t.co/cyPRxRX9wO #bioRxiv
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Sample Sizes : [1413, 743, 743]
Authors: 5
Total Words: 9183
Unqiue Words: 2537

1.989 Mikeys
#5. Transcriptome analysis of the Molecular Mechanism underlying Immunity- and Reproduction trade-off in Locusta migratoria Infected by Micrococcus luteus
Shigui Wang, Shaohua Wang, Xiaojun Liu, Zhiyong Xia, Guoqiang Xie, Bin Tang
Immune response and reproductive success are two of the main energy-consuming processes in living organisms. However, it is unclear which process is prioritized when both are required. Therefore, the present study was designed to examine this question using one of the world's most destructive agricultural pests, the migratory locust Locusta migratoria. Transcripts from the ovaries and fat bodies of newly emerged locusts were analyzed, using RNA-seq based transcriptome and qualitative real-time PCR, at 4 h and 6 d after being infected with the gram-positive bacteria Microcroccus luteus, and changes in the main biological pathways involved in reproduction and immunization were analyzed using bioinformatics. At 4 h after infection, 348 and 133 transcripts were up- and down-regulated, respectively, whereas 5699 and 44 transcripts were up- and down-regulated, respectively, at 6 d after infection. Meanwhile, KEGG analysis indicated that vital pathways related with immunity and reproduction, such as Insulin resistance, FoxO signaling,...
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Sample Sizes : [23, 6, 3, 5, 83, 33, 26, 11, 25, 4]
Authors: 6
Total Words: 7437
Unqiue Words: 2270

0.0 Mikeys
#6. The Object Space Task for mice and rats
Lisa Genzel, Evelien Schut, Tim Schroeder, Ronny Eichler, Angela Gomez, Irene Navarro Lobato, Francesco Battaglia
Declarative memory encompasses representations of specific events as well as knowledge extracted by accumulation over multiple episodes. To investigate how these different sorts of memories are created, we developed a new behavioral task in rodents. The task consists of three distinct conditions (stable, overlapping, random). Rodents are exposed to multiple sample trials, in which they explore objects in specific spatial arrangements. In the stable condition, the locations are constant during all sample trials; in the test trial, one objects location is changed. In the random condition, object locations are presented in the sample phase without a specific spatial pattern. In the overlapping condition, one location is shared (overlapping) between all trials while the other location changes during sample trials. We show that in the overlapping condition, instead of only remembering the last sample trial, rodents form a cumulative memory of the sample trials. Here we could show that both mice and rats can accumulate information...
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hugospiers: RT @memorydynamics: Updated preprint on the Object Space task: now with twice the n and 5d test! https://t.co/JYef01cwGN with @evelien_schu…
battaglialab: RT @memorydynamics: Updated preprint on the Object Space task: now with twice the n and 5d test! https://t.co/JYef01cwGN with @evelien_schu…
L_Genzel: RT @memorydynamics: Updated preprint on the Object Space task: now with twice the n and 5d test! https://t.co/JYef01cwGN with @evelien_schu…
memorydynamics: RT @memorydynamics: Updated preprint on the Object Space task: now with twice the n and 5d test! https://t.co/JYef01cwGN with @evelien_schu…
evelien_schut: RT @memorydynamics: Updated preprint on the Object Space task: now with twice the n and 5d test! https://t.co/JYef01cwGN with @evelien_schu…
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Repository: score
User: MemDynLab
Language: Python
Stargazers: 0
Subscribers: 2
Forks: 1
Open Issues: 3
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Authors: 7
Total Words: 7753
Unqiue Words: 1949

0.0 Mikeys
#7. Behavioral repeatability and foraging performance in wild free-flying nectarivorous bats (Glossophaga commissarisi)
Vladislav Nachev, York Winter
Animal individuals show patterns of behavior that are stable within individuals but different among individuals. Such individual differences are potentially associated with differences in foraging efficiency and in fitness. Furthermore, behavioral responses may be correlated in specific suites of so called behavioral syndromes that are consistent across different contexts and with time. Here we present a field investigation on individual differences between wild, free-flying nectarivorous bats ( Glossophaga commissarisi ) in the foraging context. We further investigated how individual differences affect choice performance, and we examined their interdependence within hypothesized behavioral syndrome structures. Free-ranging bats were individually identified as they visited an array of 24 artificial flowers with nectar of high or low sugar concentration. We found that three behavioral measures of foraging behavior were individually stable over the two-month observation period. We investigated the link between individual behavioral...
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BaheerathanM: Behavioral repeatability and foraging performance in wild free-flying nectarivorous bats (Glossophaga commissarisi) https://t.co/IR6VjNeuAM
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Authors: 2
Total Words: 7709
Unqiue Words: 2236

0.0 Mikeys
#8. Social integration predicts mitochondrial DNA copy number in rhesus macaques
Reena Debray, Noah Snyder-Mackler, Jordan Kohn, Mark Wilson, Luis Barreiro, Jenny Tung
In many social mammals, social adversity predicts compromised health and reduced fitness. These effects are thought to be driven in part by chronic social stress, but their molecular underpinnings are not well understood. Recent work suggests that chronic stress can affect mitochondrial copy number, heteroplasmy rates, and function. Here, we tested the first two possibilities, for the first time in nonhuman primates. We manipulated dominance rank in captive female rhesus macaques (n=45), where low rank induces chronic social stress, and measured mitochondrial DNA copy number and heteroplasmy in five peripheral blood mononuclear cell types from each study subject. We found no effect of dominance rank on either mtDNA copy number or heteroplasmy rates. However, grooming rates, a measure of affiliative social behavior predicted by high social status, was positively associated with mtDNA copy number in B cells, cytotoxic T cells, and monocytes. Our results suggest that social interactions can influence mtDNA regulation in immune cells....
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biorxivpreprint: Social integration predicts mitochondrial DNA copy number in rhesus macaques https://t.co/U54HwXPJY9 #bioRxiv
jtung5: Very proud of this new undergrad-led #preprint by Reena Debray (now doing her PhD Berkeley w/@bkoskella)! Grooming rates, but not dominance rank, predict mtDNA copy number in rhesus macaques (w/@SMack_Lab & @LB_Barreiro). https://t.co/sH2wByyvjL
wahyuwei: Social integration predicts mitochondrial DNA copy number in rhesus macaques https://t.co/DIdZhDBiFJ
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Repository: mtDNA_copy_number
User: reenadebray
Language: R
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Authors: 6
Total Words: 3285
Unqiue Words: 1349

0.0 Mikeys
#9. Nepotism masks evidence for reciprocity in cooperation networks
Gerald Carter, Gabriele Schino, Damien Farine
Nepotism and reciprocity are not mutually exclusive explanations for cooperation; helping decisions can depend on both kinship cues and past reciprocal help. The importance of these two factors can therefore be difficult to disentangle with observational data. We developed a resampling procedure for inferring the statistical power to detect observational evidence of nepotism and reciprocity, and applied this procedure to simulated and real datasets. We simulated datasets resulting from perfect reciprocity, where the probability and duration of helping events from individual A to B equaled B to A. We also simulated varying degrees of simultaneous nepotism. We then assessed how nepotism and sampling effort influenced the probability of detecting evidence of reciprocity. We applied the same analysis to empirical data on food sharing in vampire bats and allogrooming in mandrills and Japanese macaques. Nepotism consistently masked evidence for reciprocity. With perfect reciprocity and imperfect nepotism, nepotism was more likely to be...
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gerrygcarter: "Nepotism masks evidence for reciprocity in cooperation networks" (in revision). We include simulations to help with disentangling the effects of long-term reciprocal help and kinship in observational datasets. Any feedback is appreciated. https://t.co/g5Zc4SpfTz
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Authors: 3
Total Words: 11085
Unqiue Words: 3302

0.0 Mikeys
#10. Perception of naturally dead conspecifics impairs health and longevity through serotonin signaling in Drosophila
Tuhin S Chakraborty, Christi M Gendron, Yang Lyu, Allyson S Munneke, Madeline N DeMarco, Zachary W Hoisington, Scott D Pletcher
Sensory perception modulates health and aging across taxa. Understanding the nature of relevant cues and the mechanisms underlying their action may lead to novel interventions that improve the length and quality of life. In humans, psychological trauma is often associated with the recognition of dead individuals, with chronic exposure leading to persistent mental health issues including depression and post-traumatic stress disorder. The mechanisms that link mental and physical health, and the degree to which these are shared across species, remain largely unknown. Here we show that the vinegar fly, Drosophila melanogaster , has the capability to perceive dead conspecifics in its environment and that this perceptive experience induces both short- and long-term effects on health and longevity. Death perception is mediated by visual and olfactory cues, and remarkably, its effects on aging are eliminated by targeted attenuation of serotonin signaling. Our results suggest a complex perceptive ability in Drosophila that reveals deeply...
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GaboTuitero: Preprint: Perception of naturally dead conspecifics impairs health and longevity through serotonin signaling in Drosophila https://t.co/b6RAeFlTSN
DegenRolf: Fruit flies get sick from watching dead conspecifics. https://t.co/x4bQU86Zqp https://t.co/Fmog15m9qa
neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https://t.co/Z01wp6k7kz
PavelProsselkov: Seeing the dead bodies: “...D.melanogaster has the capability to perceive dead conspecifics in its environment and that this perceptive experience induces both short- and long-term effects on health and longevity” https://t.co/p1gbj51CzG
researchonaging: Perception of naturally dead conspecifics impairs health and longevity through serotonin signaling in Drosophila https://t.co/BPkZf8PdR7 https://t.co/53COn9iyGk
PromPreprint: Perception of naturally dead conspecifics impairs health and longevity through serotonin signaling in Drosophila https://t.co/4j1zY3m8uw
neil_me: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
philipquick: RT @DegenRolf: Fruit flies get sick from watching dead conspecifics. https://t.co/x4bQU86Zqp https://t.co/Fmog15m9qa
anavinuela: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
GeorgeBorges: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
antoinearray: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
ErikMaronde: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
gustavoq33: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
gabi6sgb: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
SteppeRunner: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
caffeinatedcee: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
Quercus86954081: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
mausandia: RT @neuroecology: Flies that smell other dead flies die sooner (because of serotonin, that bastard chemical!) https://t.co/fssNvlQoFU https…
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Sample Sizes : [10000]
Authors: 7
Total Words: 4670
Unqiue Words: 1444

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