Color Pecking Preferences in White Leghorn Chickens: Erratum.

Fischer, Gloria J.; Morris, Grant L.; Ruhsam, John P.

doi:10.1037/h0078149

Cited by 4 publications

(3 citation statements)

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“…This was the P cue. We chose to use an orange saturation scale because chickens do not appear to have an inherent preference for or against this colour [ 21 ], [ 27 ], [ 28 ]. In addition, orange was not present in the home environment minimising the chance of induced preferences that can sometimes result from exposure to coloured feeders or drinkers [ 29 ].…”

Section: Methodsmentioning

confidence: 99%

A Screen-Peck Task for Investigating Cognitive Bias in Laying Hens

et al. 2016

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Affect-induced cognitive judgement biases occur in both humans and animals. Animals in a more negative affective state tend to interpret ambiguous cues more negatively than animals in a more positive state and vice versa. Investigating animals’ responses to ambiguous cues can therefore be used as a proxy measure of affective state. We investigated laying hens’ responses to ambiguous stimuli using a novel cognitive bias task. In the ‘screen-peck’ task, hens were trained to peck a high/low saturation orange circle presented on a computer screen (positive cue–P) to obtain a mealworm reward, and to not peck when the oppositely saturated orange circle was presented (negative cue–N) to avoid a one second air puff. Ambiguous cues were orange circles of intermediate saturation between the P and N cue (near-positive–NP; middle–M; near-negative–NN), and were unrewarded. Cue pecking showed a clear generalisation curve from P through NP, M, NN to N suggesting that hens were able to associate colour saturation with reward or punishment, and could discriminate between stimuli that were more or less similar to learnt cues. Across six test sessions, there was no evidence for extinction of pecking responses to ambiguous cues. We manipulated affective state by changing temperature during testing to either ~20°C or ~29°C in a repeated measures cross-over design. Hens have been shown to prefer temperatures in the higher range and hence we assumed that exposure to the higher temperature would induce a relatively positive affective state. Hens tested under warmer conditions were significantly more likely to peck the M probe than those tested at cooler temperatures suggesting that increased temperature in the ranges tested here may have some positive effect on hens, inducing a positive cognitive bias.

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Section: Methodsmentioning

confidence: 99%

A Screen-Peck Task for Investigating Cognitive Bias in Laying Hens

et al. 2016

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“…The cups were mounted on a wooden platform (width: 20 cm; height: 2 cm; length: 20 cm) resulting in a double bottom to prevent odour cues. On the back wall of each arm behind the cups, a LED light strip (Arduino nano, ARDUINO®, via Distrelec, Nänikon, CH) was attached which could emit either violet (423 nm; RGB colour codes: 93,0255) or yellow light (598 nm; RGB colour codes: 255,197,0; see Fischer et al, 1975). The colour of the LED-strip in each arm was opposite to the other and randomly changed daily, but was never the same colour for more than two days in a row.…”

Section: Cognitive Assessment Through Y-maze Testingmentioning

confidence: 99%

Effects of on-farm hatching on short term stress indicators, weight gain, and cognitive ability in layer chicks

Witjes

Bruckmaier

Gebhardt-Henrich

et al. 2022

Applied Animal Behaviour Science

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“…Another reason for the inconsistency could be that birds di¡er in their pecking preferences for di¡erent colours depending on whether or not the item is an insect. For instance, when presented with illuminated spherical discs or small beads, chicks prefer red or blue (Fisher et al 1975;Rogers 1995 and references therein). On the other hand, when presented with insects, chicks seem to be relatively averse to red (Roper & Cook 1989;Roper 1990).…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of the historical changes in mycorrhizal fungal communities under anthropogenic nitrogen deposition

Gamberale‐Stille

Tullberg²

2001

Proceedings: Biological Sciences

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Colours are common stimuli in signalling systems. Requirements to function well as a signal sometimes con£ict between di¡erent signallers, and the same colour stimulus is used to convey completely di¡erent messages to the same receiver. Fruits and aposematic insects both use red coloration as a signal, in the former case to signal pro¢tability and in the latter case as a warning signal. In two experiments, we investigated whether the domestic chick, an omnivorous predator, di¡ered in its unconditioned preference or avoidance of red and green stimuli depending on whether or not the stimulus was an insect. The experiments were designed as preference tests between red and green painted prey. The prey were live insects and arti¢cial fruits (experiment 1), and, to investigate the e¡ect of movement, live and dead insects (experiment 2). The chicks did not show any di¡erence in pecking preference between red and green when fruit-like stimuli were used, but when the prey were insects, green prey were strongly preferred to red prey, and prey movement did not a¡ect this bias. Thus, young chicks may recognize prey as insects and then discriminate between di¡erent prey colorations, or one type of food may elicit an unlearned colour preference^avoidance response that is absent with another type of food.

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Color Pecking Preferences in White Leghorn Chickens: Erratum.

Cited by 4 publications

References 0 publications

A Screen-Peck Task for Investigating Cognitive Bias in Laying Hens

A Screen-Peck Task for Investigating Cognitive Bias in Laying Hens

Effects of on-farm hatching on short term stress indicators, weight gain, and cognitive ability in layer chicks

Reconstruction of the historical changes in mycorrhizal fungal communities under anthropogenic nitrogen deposition

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