Chicks require heat to maintain body temperature during the first weeks after hatch. This may be provided by dark brooders; i.e. , horizontal heating elements equipped with curtains. The objective was test effects of rearing layer chicks brooders on time budget and fearfulness. Behavioral observations were performed six age. Three different fear tests conducted when birds age 3-6, 14-15 26-28 weeks. During four days, brooder rested more than control whereas they spent less drinking, feather...

Abstract Living systems exhibit non-randomly organized biochemical, physiological, and behavioral processes that follow distinctive patterns. In particular, animal behavior displays both fractal dynamics periodic rhythms yet the relationship between these two dynamic regimens remain unexplored. Herein we studied locomotor time series of visually isolated Japanese quails sampled every 0.5 s during 6.5 days (>10 6 data points). These high-resolution, week-long, enabled simultaneous...

Background Leptospirosis is the world’s most common zoonotic disease. Mitigation and control rely on pathogen identification understanding roles of potential reservoirs in cycling transmission. Underreporting misdiagnosis obscure magnitude problem confound efforts to understand key epidemiological components. Difficulties culturing hamper use serological diagnostics delay development DNA detection methods. As a result, especially complex ecosystems, we know very little about importance...

One challenge faced by ethologists in poultry welfare is helping birds to form functionally successful groups over time through the expression of appropriate behaviors. Searching for phenotypic variability, we developed Japanese quail a density-related permanence (DRP) test that enables us classify young (while groups) according their individual boxes containing high or low density confined conspecifics (HD LD, respectively). This study addressed question whether contrasting DRP behavior may...

Animal transport is an indispensable practice in species that need to be moved for management or commercial purposes. However, may have negative effects on individuals' welfare. The aims of the present work were determine if behavioral responses adult Greater Rheas (Rhea americana) bred captivity are sensitive short-term and males females differ their posttransport activity recovery. Eight 8 placed individual pens allowed 6 d habituate (d 1 6) before procedure. On day 7), half birds (4 4...

Injurious pecking (IP) remains one of the major welfare challenges in housing laying hens worldwide due to negative consequences it inflicts on animal and economy. One potential solution reduce IP is use dark brooders as primary heat source during rearing. The objective was investigate effects rearing layer chicks with different management strategies size allowances production-related traits rear lay. Groups 100 103 Isa Warren were reared either 4 brooder types (n = per treatment) or...

Abstract Temporal and spatial patterns of locomotion reflect both resting periods the movement from one place to another satisfy physiological behavioural needs. Locomotion is studied in diverse areas biology such as chronobiology physiology, well biomathematics. Herein, 24 visually-isolated Japanese quails their home-box environment was recorded continuously over a 6.5 days at 0.5 s sampling rate. Three time series are presented for each bird: (1) locomotor activity, (2) distance ambulated,...

Runway tests are considered indicative of underlying sociality in birds and their ability to make social discriminations establish interactions among conspecifics. Herein, reinstatement behavior male juvenile Japanese quail selected for a reduced (LS, low stress) or exaggerated (HS, high adrenocortical response brief mechanical restraint was evaluated. Individual males were given the choice reinstate with either 2 (low density, LD) 8 (high HD) unfamiliar randombred conspecifics placed goal...

Abstract The behavioral dynamics within a social group not only could depend on individual traits and social-experience of each member, but more importantly, emerges from inter-individual interactions over time. Herein, we first present dataset, as well the corresponding original video recordings, results 4 tests associated with fear aggressive response performed 106 Japanese quail. In second stage, birds were housed conspecifics that similarly in groups 2 females 1 male. By continuously...

Leptospirosis causes significant economic losses and is an occupational risk in the swine industry, especially developing tropical regions where social geoclimatic conditions are favorable for transmission of this disease. Although vaccination can reduce infection risk, efficacy diminished if local genetic antigenic variants pathogen not accounted vaccine. Identifying characterizing strains hosts, potential mechanisms therefore critical public health mitigation practices.

Quail under short d (SD) reduce their gonadal development, and consequently cloacal gland (CG) size, aggressiveness, sexual behaviors, reproductive performance. However, some quail appear nonresponsive to SD inhibition. When male were arbitrarily classified according CG involution during maximum photoinhibition (5 wk after exposure) as either (NR-SD) or responsive (R-SD), NR-SD showed intermediate volume between R-SD the control kept on long (C-LD). Herein, we evaluate whether Japanese...

Abstract Background Leptospirosis causes significant economic losses and is an occupational risk in the swine industry, especially developing tropical regions where social geoclimatic conditions are favorable for transmission of this disease. Although vaccination can reduce infection risk, efficacy diminished if local genetic antigenic variants pathogen not accounted vaccine. Identifying characterizing strains that circulate different populations therefore critical public health mitigation...

Social interactions have been extensively studied in poultry a variety of environmental situations. Many studies allow full social contacts between birds, but there are others which the tested through barriers (wire mesh or glass). Thus situation where, according to their needs, some birds can get access physical contact with conspecifics while cannot, would be useful expand testing options for interaction studies. We developed an individual barrier device (IPB) that is fitted on delimit...

1. This study examines the time courses of male mating behaviours using quail that were categorised at 2 d age as high performance (HP) or low (LP) individuals in a T-maze. 2. Individually caged males from each T-maze category observed for 5 min after female same (HP LP) was introduced into their home cages sexual partner 4, 5, 6, 8, 10 and 12 weeks age. The number grabs, mounts cloacal contacts performed by his copulatory efficiency (number contacts/number grabs; CE) determined interval. 3....

[fr]Les plantes à fleurs hermaphrodites montrent un compromis entre l'assignation de ressources aux fonctions mâle et femelle la reproduction. Cet équilibre peut se voir conditionné par des facteurs écologiques divers dont l'agent polinisateur. Thalictrum est genre présentant espèces qui comptent différents moyens polinisation. Nous avons donc recherché les modèles d'assignation dans chacune (mâle femelle) cinc du utilisent agents polinisateurs. Cette assignation a été mesurée le poids sec...

The traffic congestion present in practically every city has, among its increasing factors, the unavailability of enough parking spaces. A typical driver invests a considerable part total trip time looking for free space where to park his vehicle; many cases, this leads delays and consequent discomfort due undesired consequences generated tardiness. For problem it is possible find partial palliative solutions, minimizing spent searching by applying Internet Things techniques, oriented smart...

Broiler chicks that traverse a T-maze quickly to reinstate contact with their companions (HP, high performers) are known grow faster, more social, and have reduced plasma corticosterone response acute stress than slower (LP, low performers). High-performing quail from line selected for rather exaggerated (high-stress) adrenocortical responsiveness also show enhanced female reproductive performance when compared LP–high-stress quail. Herein, time courses of male sexual development were...

The density-related permanence test (DRP) is used to classify young birds (while in groups) according their individual proximity either a high or low density of conspecifics (HD LD, respectively). birds’ performance DRP was associated with underlying differences the social responses individuals. Quails homogeneous groups LD residents responded less compact and higher levels agonistic interactions presence an intruder, showed among cagemates than HD birds. This study deepen characterization...

Abstract Background Leptospirosis is the world’s most common zoonotic disease. Mitigation and control rely on pathogen identification understanding roles of potential reservoirs in cycling transmission. Underreporting misdiagnosis obscure magnitude problem confound efforts to understand key epidemiological components. Difficulties culturing hamper use serological diagnostics delay development DNA detection methods. As a result, especially complex ecosystems, we know very little about...

Test of sociality in poultry is mainly based on the bird's individual ability to make quick social discriminations. In recent years, a density-related permanence (DRP) test has been developed that enables us classify young birds (while groups) according their proximity either high or low density conspecifics (HD LD, respectively). Thus, result classification depends not only response but also outcome interactions within whole group. The birds' performance DRP was associated with underlying...