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Animal Behaviour

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https://www.readbyqxmd.com/read/28926644/assessment-of-housing-density-space-allocation-and-social-hierarchy-of-laboratory-rats-on-behavioural-measures-of-welfare
#1
Timothy Hugh Barker, Rebecca Peta George, Gordon Stanley Howarth, Alexandra Louise Whittaker
Minimum space allowances for laboratory rats are legislated based on weight and stocking rates, with the understanding that increased housing density encourages crowding stress. However, there is little evidence for these recommendations, especially when considering positive welfare outcomes. This study consisted of two experiments which investigated the effects of housing density (rats per cage), space allocation (surface area per rat) and social rank (dominance hierarchy) on the ability to perform simple behavioural tests...
2017: PloS One
https://www.readbyqxmd.com/read/28926027/using-institutional-and-behavioural-economics-to-examine-animal-health-systems
#2
C A Wolf
Economics provides a framework for understanding management decisions and their policy implications for the animal health system. While the neoclassical economic model is useful for framing animal health decisions on the farm, some of its assumptions and prescriptive results may be unrealistic. Institutional and behavioural economics address some of these potential shortcomings by considering the role of information, psychology and social factors in decisions. Framing such decisions under contract theory allows us to consider asymmetric information between policy-makers and farmers...
April 2017: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/28926005/social-and-economic-aspects-of-aquatic-animal-health
#3
K E Adam, G J Gunn
Aquaculture is an increasingly important source of animal protein for a growing global population. Disease is a major constraint to production, with resultant socio-economic impacts for individuals, communities and economies which rely on aquaculture. Aquatic animal health is also strongly influenced by human factors, ranging from international trade regulations to the behaviours of individuals working in aquaculture. This article summarises the human factors associated with aquaculture production using international examples for illustration...
April 2017: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/28921258/models-of-kleptoparasitism-on-networks-the-effect-of-population-structure-on-food-stealing-behaviour
#4
Christoforos Hadjichrysanthou, Mark Broom, Jan Rychtář
The behaviour of populations consisting of animals that interact with each other for their survival and reproduction is usually investigated assuming homogeneity amongst the animals. However, real populations are non-homogeneous. We focus on an established model of kleptoparasitism and investigate whether and how much population heterogeneities can affect the behaviour of kleptoparasitic populations. We consider a situation where animals can either discover food items by themselves or attempt to steal the food already discovered by other animals through aggressive interactions...
September 18, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28918312/-reinforcement-learning-to-forage-optimally
#5
REVIEW
Nils Kolling, Thomas Akam
Foraging effectively is critical to the survival of all animals and this imperative is thought to have profoundly shaped brain evolution. Decisions made by foraging animals often approximate optimal strategies, but the learning and decision mechanisms generating these choices remain poorly understood. Recent work with laboratory foraging tasks in humans suggest their behaviour is poorly explained by model-free reinforcement learning, with simple heuristic strategies better describing behaviour in some tasks, and in others evidence of prospective prediction of the future state of the environment...
September 14, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/28917608/environmental-enrichment-in-the-absence-of-wheel-running-produces-beneficial-behavioural-and-anti-oxidative-effects-in-rats
#6
F Mármol, J Sánchez, M N Torres, V D Chamizo
The effects of early environmental enrichment (EE) when solving a simple spatial task in adult male rats were assessed. After weaning, rats were housed in pairs in enriched or standard cages (EE and control groups) for two and a half months. Then the rats were trained in a triangular-shaped pool to find a hidden platform whose location was defined in terms of two sources of information, a landmark outside the pool and a particular corner of the pool. As expected, enriched rats reached the platform faster than control animals...
September 13, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28916808/the-effects-of-domestication-and-ontogeny-on-cognition-in-dogs-and-wolves
#7
Michelle Lampe, Juliane Bräuer, Juliane Kaminski, Zsófia Virányi
Cognition is one of the most flexible tools enabling adaptation to environmental variation. Living close to humans is thought to influence social as well as physical cognition of animals throughout domestication and ontogeny. Here, we investigated to what extent physical cognition and two domains of social cognition of dogs have been affected by domestication and ontogeny. To address the effects of domestication, we compared captive wolves (n = 12) and dogs (n = 14) living in packs under the same conditions...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28916748/%C3%AE-2-adrenoceptor-mediated-inhibition-in-the-central-amygdala-blocks-fear-conditioning
#8
N M Holmes, J W Crane, M Tang, J Fam, R F Westbrook, A J Delaney
The central amygdala is critical for the acquisition and expression of fear memories. This region receives a dense innervation from brainstem noradrenergic cell groups and has a high level of α2-adrenoceptor expression. Using whole-cell electrophysiological recordings from rat brain slices, we characterise the role of pre-synaptic α2-adrenoceptor in modulating discrete inhibitory and excitatory connections within both the lateral and medial division of the central amygdala. The selective α2-adrenoceptor agonist clonidine blocked the excitatory input from the pontine parabrachial neurons onto neurons of the lateral central amygdala...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28916700/a-small-animal-vet-with-an-interest-in-animal-behaviour
#9
Karen Wade
No abstract text is available yet for this article.
September 16, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28916502/sociability-trait-and-regional-cerebral-oxidative-metabolism-in-rats-predominantly-nonlinear-relations
#10
Margus Kanarik, Jaanus Harro
Deficits in social behaviour are common in psychopathological conditions e.g., depression, autism and schizophrenia. In rats, sociability, defined as the engagement of an animal in non-aggressive social contact with a conspecific in a neutral arena, is as a persistent trait. To elucidate the neuroanatomy of social behaviour in animal models, long term neuronal energy metabolism was studied in rats preselected for sociability levels. Rats were divided into groups with high, medium and low sociability levels (HS, MS and LS) according to the average score of three social interaction tests, and cerebral long-term energy metabolism was assayed with cytochrome oxidase histochemistry...
September 12, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28913644/affective-associative-two-process-theory-a-neurocomputational-account-of-partial-reinforcement-extinction-effects
#11
Robert Lowe, Alexander Almér, Erik Billing, Yulia Sandamirskaya, Christian Balkenius
The partial reinforcement extinction effect (PREE) is an experimentally established phenomenon: behavioural response to a given stimulus is more persistent when previously inconsistently rewarded than when consistently rewarded. This phenomenon is, however, controversial in animal/human learning theory. Contradictory findings exist regarding when the PREE occurs. One body of research has found a within-subjects PREE, while another has found a within-subjects reversed PREE (RPREE). These opposing findings constitute what is considered the most important problem of PREE for theoreticians to explain...
September 14, 2017: Biological Cybernetics
https://www.readbyqxmd.com/read/28912473/fine-scale-harbour-seal-usage-for-informed-marine-spatial-planning
#12
Esther L Jones, Carol E Sparling, Bernie J McConnell, Christopher D Morris, Sophie Smout
High-resolution distribution maps can help inform conservation measures for protected species; including where any impacts of proposed commercial developments overlap the range of focal species. Around Orkney, northern Scotland, UK, the harbour seal (Phoca vitulina) population has decreased by 78% over 20 years. Concern for the declining harbour seal population has led to constraints being placed on tidal energy generation developments. For this study area, telemetry data from 54 animals tagged between 2003 and 2015 were used to produce density estimation maps...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912089/vocal-correlates-of-emotional-reactivity-within-and-across-contexts-in-domestic-pigs-sus-scrofa
#13
Lisette M C Leliveld, Sandra Düpjan, Armin Tuchscherer, Birger Puppe
Vocalizations have long been recognized to encode information about an individual's emotional state and, as such, have contributed to the study of emotions in animals. However, the potential of vocalizations to also encode information about an individual's emotional reactivity has received much less attention. In this study, we aimed to test whether the vocalizations of domestic pigs contain correlates of emotional reactivity that are consistent between different contexts. We recorded vocalizations of 120 young female pigs in an experimental arena in two consecutive recording contexts, social isolation and an encounter with a familiar human...
September 11, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28911857/new-mouse-model-for-inducing-and-evaluating-unilateral-vestibular-deafferentation-syndrome
#14
R Cassel, P Bordiga, D Pericat, C Hautefort, B Tighilet, C Chabbert
BACKGROUND: Unilateral vestibular deafferentation syndrome (uVDS) holds a particular place in the vestibular pathology domain. Due to its suddenness, the violence of its symptoms that often result in emergency hospitalization, and its associated original neurophysiological properties, this syndrome is a major source of questioning for the otoneurology community. Also, its putative pathogenic causes remain to be determined. There is currently a strong medical need for the development of targeted and effective countermeasures to improve the therapeutic management of uVDS...
September 11, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28911750/effect-of-counselling-on-health-care-seeking-behaviours-and-rabies-vaccination-adherence-after-dog-bites-in-haiti-2014-15-a-retrospective-follow-up-survey
#15
Melissa Dominique Etheart, Maxwell Kligerman, Pierre Dilius Augustin, Jesse D Blanton, Benjamin Monroe, Ludder Fleurinord, Max Millien, Kelly Crowdis, Natael Fenelon, Ryan MacLaren Wallace
BACKGROUND: Haiti has an integrated bite case management (IBCM) programme to counsel animal-bite victims on the risk of rabies and appropriate treatment, as well as the Haiti Animal Rabies Surveillance Program (HARSP) to examine the animals. We assessed the usefulness of the IBCM programme to promote best practices for rabies prophylaxis after exposure in a low-income rabies-endemic setting. METHODS: We did a retrospective follow-up survey of randomly selected bite victims who were counselled by Haiti's IBCM programme between May 15, 2014, and Sept 15, 2015...
October 2017: Lancet Global Health
https://www.readbyqxmd.com/read/28910416/lateralized-behaviour-as-indicator-of-affective-state-in-dairy-cows
#16
Sarah Kappel, Michael T Mendl, David C Barrett, Joanna C Murrell, Helen R Whay
In humans, there is evidence that sensory processing of novel or threatening stimuli is right hemisphere dominated, especially in people experiencing negative affective states. There is also evidence for similar lateralization in a number of non-human animal species. Here we investigate whether this is also the case in domestic cattle that may experience long-term negative states due to commonly occurring conditions such as lameness. Health and welfare implications associated with pain in lame cows are a major concern in dairy farming...
2017: PloS One
https://www.readbyqxmd.com/read/28910319/chronic-social-defeat-induces-long-term-behavioral-depression-of-aggressive-motivation-in-an-invertebrate-model-system
#17
Jacqueline Rose, Jan Rillich, Paul A Stevenson
Losing a fight against a conspecific male (social defeat) induces a period of suppressed aggressiveness and general behaviour, often with symptoms common to human psychiatric disorders. Agonistic experience is also discussed as a potential cause of consistent, behavioral differences between individuals (animal "personality"). In non-mammals, however, the impact of single agonistic encounters typically last only hours, but then again studies of repeated intermittent defeat (chronic social defeat) are seldom...
2017: PloS One
https://www.readbyqxmd.com/read/28904449/james-wenceslaus-papez-his-circuit-and-emotion
#18
Kalyan B Bhattacharyya
James Papez worked on the anatomical substrates of emotion and described a circuit, mainly composed of the hippocampus, thalamus and cingulum, and published his observations in 1937. However, such an idea existed before him, as evidenced by the rudimentary indications from Paul Broca, and Paul MacLean added some other structures like, septum, amygdala, and hypothalamus in its ambit and called it the limbic system. Paul Ivan Yakovlev, proposed a circuit which also referred to orbitofrontal, insular, anterior temporal lobe, and other nuclei of thalamus...
July 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28904140/quantitative-study-of-developmental-biology-confirms-dickinsonia-as-a-metazoan
#19
Renee S Hoekzema, Martin D Brasier, Frances S Dunn, Alexander G Liu
The late Ediacaran soft-bodied macroorganism Dickinsonia (age range approx. 560-550 Ma) has often been interpreted as an early animal, and is increasingly invoked in debate on the evolutionary assembly of eumetazoan body plans. However, conclusive positive evidence in support of such a phylogenetic affinity has not been forthcoming. Here we subject a collection of Dickinsonia specimens interpreted to represent multiple ontogenetic stages to a novel, quantitative method for studying growth and development in organisms with an iterative body plan...
September 13, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28904134/an-ant-plant-mutualism-through-the-lens-of-cgmp-dependent-kinase-genes
#20
Pierre-Jean G Malé, Kyle M Turner, Manjima Doha, Ina Anreiter, Aaron M Allen, Marla B Sokolowski, Megan E Frederickson
In plant-animal mutualisms, how an animal forages often determines how much benefit its plant partner receives. In many animals, foraging behaviour changes in response to foraging gene expression or activation of the cGMP-dependent protein kinase (PKG) that foraging encodes. Here, we show that this highly conserved molecular mechanism affects the outcome of a plant-animal mutualism. We studied the two PKG genes of Allomerus octoarticulatus, an Amazonian ant that defends the ant-plant Cordia nodosa against herbivores...
September 13, 2017: Proceedings. Biological Sciences
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