The use of relative and absolute bearings by Clark’s nutcrackers,Nucifraga columbiana

Jones, Juli E.; Kamil, Alan C.

doi:10.3758/bf03192821

Cited by 22 publications

(19 citation statements)

References 17 publications

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“…Given the lack of control inherent in a field experiment, it is highly unlikely that even if one or two landmarks at a release site could be moved that this would result in a corresponding shift in orientation. Successful landmark shifts in the laboratory have required control of cues external to the experimental task in order to discount their use (see Jones and Kamil, 2001 for a description of such a task). It is possible, however, to manipulate the visual sense of pigeons and still perform release experiments.…”

Section: Direct Evidence For the Use Of Visual Landmarks By Homingmentioning

confidence: 99%

The role of visual landmarks in the avian familiar area map

Holland

2003

Journal of Experimental Biology

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The question of whether homing pigeons use visual landmarks for orientation from distant, familiar sites is an unresolved issue in the field of avian navigation. Where evidence has been found, the question still remains as to whether the landmarks are used independent of the map and compass mechanism for orientation that is so important to birds. Recent research has challenged the extent to which experiments that do not directly manipulate the visual sense can be used as evidence for compass-independent orientation. However, it is proposed that extending a new technique for research on vision in homing to include manipulation of the compasses used by birds might be able to resolve this issue. The effect of the structure of the visual sense of the homing pigeon on its use of visual landmarks is also considered.

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Section: Direct Evidence For the Use Of Visual Landmarks By Homingmentioning

confidence: 99%

The role of visual landmarks in the avian familiar area map

Holland

2003

Journal of Experimental Biology

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“…There are many ways that the location of G can be encoded, including the bearing and distance from any single landmark, the absolute bearings to any pair of landmarks and the relative bearings among landmarks. Jones & Kamil (2001) found that nutcrackers can encode relative bearings from landmarks if trained in a specific way. In this study, the target location was defined by a constant angle from two landmarks whose distance between each other and position in the room varied from trial to trial.…”

Section: What Information Is Actually Encoded? (A) Bearings and Geomementioning

confidence: 99%

“…They noted that in the Kamil & Jones studies (i.e. Kamil & Jones 1997;Jones & Kamil 2001), there were indications that nutcrackers were more accurate when using directional information than distance information, especially when the goal location was located relatively far from the landmarks. This led them to consider the role of bearings, particularly the direction from the goal to each of several landmarks.…”

Section: What Information Is Actually Encoded? (A) Bearings and Geomementioning

confidence: 99%

What scatter-hoarding animals have taught us about small-scale navigation

Gould

Kelly

Kamil³

2010

Phil. Trans. R. Soc. B

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Many animals use cues for small-scale navigation, including beacons, landmarks, compasses and geometric properties. Scatter-hoarding animals are a unique system to study small-scale navigation. They have to remember and relocate many individual spatial locations, be fairly accurate in their searching and have to remember these locations for long stretches of time. In this article, we review what is known about cue use in both scatter-hoarding birds and rodents. We discuss the importance of local versus global cues, the encoding of bearings and geometric rules, the use of external compasses such as the Sun and the influence of the shape of experimental enclosures in relocating caches or hidden food. Scatter-hoarding animals are highly flexible in how and what they encode. There also appear to be differences in what scatter-hoarding birds and rodents encode, as well as what scatter-hoarding animals in general encode compared with other animals. Areas for future research with scatter-hoarding animals are discussed in light of what is currently known.

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“…It appears that animals can use transformation-of-scale in spatial maps to find new locations. Clark’s nutcrackers, for example, can use relative geometric relationships between landmarks to find hidden food and can transfer these relationships to new interlandmark distances (Jones et al 2002; Jones and Kamil 2001; Kamil and Jones 2000; Spetch et al 2003). For example, the nutcrackers learned to find food that was hidden halfway between two landmarks even when they had not been previously trained on the particular absolute distance between the landmarks (Kamil and Jones 2000).…”

Section: Introductionmentioning

confidence: 99%

Relative temporal representations in Pavlovian conditioning

Wan

Djourthe

Taylor

et al. 2010

Behavioural Processes

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The transfer of relative temporal representations was assessed in a series of three experiments. In each experiment, rats (Rattus norvegicus) received one set of conditioned stimulus (CS) and intertrial interval (ITI) durations in Phase 1 and another set in Phase 2. The ratio between the CS and ITI intervals was either changed or maintained across phases. On the hypothesis that relative temporal representations are learned, groups receiving maintained temporal ratios across phases were expected to display greater change in responding upon encountering the new intervals. When the CS duration decreased across phases, maintaining the temporal ratio did lead to greater change in Day 1 of Phase 2 towards the final pattern of responding. However, when the CS increased across phases, maintaining the temporal ratio across phases did not facilitate adjustment to the new intervals, suggesting that extinction of previously reinforced times induced new learning. These results provide evidence that under some conditions, relative relationships in temporal maps may survive transformation-of-scale, like relative relationships in spatial maps.

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The use of relative and absolute bearings by Clark’s nutcrackers,Nucifraga columbiana

Cited by 22 publications

References 17 publications

The role of visual landmarks in the avian familiar area map

The role of visual landmarks in the avian familiar area map

What scatter-hoarding animals have taught us about small-scale navigation

Relative temporal representations in Pavlovian conditioning

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