Do gray wolves (Canis lupus) support pack mates during aggressive inter-pack interactions?

abstract：:The ability to discriminate between different quantities is widespread throughout the animal kingdom, and the underlying mechanisms of quantity discrimination are currently intensely discussed. In contrast, questions elucidating the limits of quantity estimation received rather little attention so far. Here, we examin...

journal_title：Animal cognition

authors： Mehlis M,Thünken T,Bakker TC,Frommen JG

更新日期：2015-09-01 00:00:00

abstract：:Elasmobranch fishes (sharks, skates, and rays) have been hypothesized to use the geomagnetic field as a cue for orienting and navigating across a wide range of spatial scales. Magnetoreception has been demonstrated in many invertebrate and vertebrate taxa, including elasmobranchs, but this sensory modality and the cog...

journal_title：Animal cognition

authors： Newton KC,Kajiura SM

更新日期：2017-07-01 00:00:00

abstract：:An adult California sea lion ( Zalophus californianus) with extensive experience in performing discrimination learning tasks was tested to evaluate her long-term memory for two previously learned concepts. An associative concept, that of equivalence classification, was retested after a retention interval of approximat...

journal_title：Animal cognition

authors： Reichmuth Kastak C,Schusterman RJ

更新日期：2002-12-01 00:00:00

abstract：:One model of signal evolution is based on the notion that behaviours become increasingly detached from their original biological functions to obtain a communicative value. Selection may not always favour the evolution of such transitions, for instance, if signalling is costly due to predators usurping signal productio...

journal_title：Animal cognition

authors： Dahl CD,Wyss C,Zuberbühler K,Bachmann I

更新日期：2018-07-01 00:00:00

abstract：:We investigated the behavioural and cognitive development of a captive male infant chimpanzee, Ayumu, raised by his mother, Ai. Here we report Ayumu's achievements up to the age of 2 years and 3 months, in the context of complex computer-controlled tasks. From soon after birth, Ayumu had been present during an experim...

journal_title：Animal cognition

authors： Sousa C,Okamoto S,Matsuzawa T

更新日期：2003-12-01 00:00:00

abstract：:When animals show both frequent innovation and fast social learning, new behaviours can spread more rapidly through populations and potentially increase rates of natural selection and speciation, as proposed by A.C. Wilson in his behavioural drive hypothesis. Comparative work on primates suggests that more innovative ...

journal_title：Animal cognition

authors： Bouchard J,Goodyer W,Lefebvre L

更新日期：2007-04-01 00:00:00

abstract：:The zebrafish is an ideal vertebrate model for neurobehavioral studies with translational relevance to humans. Many aspects of sleep have been studied, but we still do not understand how and why sleep deprivation alters behavioral and physiological processes. A number of hypotheses suggest its role in memory consolida...

journal_title：Animal cognition

authors： Pinheiro-da-Silva J,Silva PF,Nogueira MB,Luchiari AC

更新日期：2017-03-01 00:00:00

abstract：:Some nonhuman species demonstrate metamemory, the ability to monitor and control memory. Here, we identify memory signals that control metamemory judgments in rhesus monkeys by directly comparing performance in two metamemory paradigms while holding the availability of one memory signal constant and manipulating anoth...

journal_title：Animal cognition

authors： Brown EK,Basile BM,Templer VL,Hampton RR

更新日期：2019-05-01 00:00:00

abstract：:The ability of ungulates to discriminate among vegetation patches depends largely on the senses of vision, olfaction, tactility, and gustation. However, little is known about how ungulates rely on the respective senses in response to varying patch characteristics. This study aimed to evaluate how relative importance o...

journal_title：Animal cognition

authors： Hirata M,Kusatake N

更新日期：2021-01-01 00:00:00

abstract：:Numerosity illusions emerge when the stimuli in one set are overestimated or underestimated relative to the number (or quantity) of stimuli in another set. In the case of multi-item arrays, individual items that form a better Gestalt are more readily grouped, leading to overestimation by human adults and children. As ...

journal_title：Animal cognition

authors： Parrish AE,Beran MJ,Agrillo C

更新日期：2019-09-01 00:00:00

abstract：:In previous conditioning experiments training domestic chickens to magnetic directions, a brown strain solved the task, whereas a white strain seemed unable to do so (Freire et al. Anim Cogn 11:547-552, 2008). To test whether this was possibly caused by loss of magnetic compass orientation in the white chickens, we an...

journal_title：Animal cognition

authors： Denzau S,Niessner C,Wiltschko R,Wiltschko W

更新日期：2013-05-01 00:00:00

abstract：:Self-control has been shown to be linked with being cooperative and successful in humans and with the g-factor in chimpanzees. As such, it is likely to play an important role in all forms of problem-solving. Self-control, however, does not just vary across individuals but seems also to be dependent on the ecological n...

journal_title：Animal cognition

authors： Range F,Brucks D,Virányi Z

更新日期：2020-05-01 00:00:00

abstract：:The trap-tube problem is used to assess whether an individual is able to foresee the outcome of its actions. To solve the task, an animal must use a tool to push a piece of food out of a tube, which has a trap along its length. An animal may learn to avoid the trap through a rule based on associative processes, e.g. u...

journal_title：Animal cognition

authors： Tebbich S,Seed AM,Emery NJ,Clayton NS

更新日期：2007-04-01 00:00:00

abstract：:Inequity aversion refers to an attempt to reduce a perceived discrepancy between one's own input and output ratio (i.e. ratio between work invested and rewards obtained) and that of others. It has been proposed that inequity aversion might also play a role in the decision-making process of other animals. One issue, ho...

journal_title：Animal cognition

authors： Ostojić L,Clayton NS

更新日期：2013-09-01 00:00:00

abstract：:When humans process visual stimuli, global information often takes precedence over local information. In contrast, some recent studies have pointed to a local precedence effect in both pigeons and nonhuman primates. In the experiment reported here, we compared the speed of acquisition of two different categorizations ...

journal_title：Animal cognition

authors： Goto K,Wills AJ,Lea SE

更新日期：2004-04-01 00:00:00

abstract：:The ability to learn through imitation is thought to be the basis of cultural transmission and was long considered a distinctive characteristic of humans. There is now evidence that both mammals and birds are capable of imitation. However, nothing is known about these abilities in the third amniotic class-reptiles. He...

journal_title：Animal cognition

authors： Kis A,Huber L,Wilkinson A

更新日期：2015-01-01 00:00:00

abstract：:Few studies have examined whether non-human tool-users understand the properties that are relevant for a tool's function. We tested cotton-top tamarins (Saguinus oedipus) and rhesus macaques (Macaca mulatta) on an expectancy violation procedure designed to assess whether these species make distinctions between the fun...

journal_title：Animal cognition

authors： Santos LR,Miller CT,Hauser MD

更新日期：2003-12-01 00:00:00

abstract：:Following passive disorientation, Clark's nutcrackers (Nucifraga columbiana) learned to search for a hidden food reward located in one corner of a rectangular-shaped enclosure that contained either identical or distinct features in each corner. Identical features allowed for explicit learning of geometric cues, wherea...

journal_title：Animal cognition

authors： Reichert JF,Kelly DM

更新日期：2015-07-01 00:00:00

abstract：:Recent evidence for different tool kits, proposed to be based upon culture-like transmission, have been observed across different chimpanzee communities across Western Africa. In light of these findings, the reported failures by seven captive juvenile chimpanzees tested with 27 tool use tasks (Povinelli 2000) seem eni...

journal_title：Animal cognition

authors： Furlong EE,Boose KJ,Boysen ST

更新日期：2008-01-01 00:00:00

abstract：:True tool use has been documented in some bird species, but to our knowledge, it has not been shown in woodpeckers. Here, we investigated the ability of Picoides major to open nuts of Juglans mandshurica by consistently inserting walnuts between tree branches in a specific position that facilitated nut opening. As see...

journal_title：Animal cognition

authors： Yi X,Steele MA,Shen Z

更新日期：2014-01-01 00:00:00

abstract：:Evidence from the literature indicates that dogs' choices can be influenced by human-delivered social cues, such as pointing, and pointing combined with facial expression, intonation (i.e., rising and falling voice pitch), and/or words. The present study used an object choice task to investigate whether intonation con...

journal_title：Animal cognition

authors： Colbert-White EN,Tullis A,Andresen DR,Parker KM,Patterson KE

更新日期：2018-03-01 00:00:00

abstract：:Nonhuman animals demonstrate a number of impressive quantitative skills such as counting sets of items, comparing sets on the basis of the number of items or amount of material, and even responding to simple arithmetic manipulations. In this experiment, capuchin monkeys were presented with a computerized task designed...

journal_title：Animal cognition

authors： Beran MJ

更新日期：2008-01-01 00:00:00

abstract：:A hallmark of the human language faculty is the use of syntactic rules. The natural vocalizations of animals are syntactically simple, but several studies indicate that animals can detect and discriminate more complex structures in acoustic stimuli. However, how they discriminate such structures is often not clear. Us...

journal_title：Animal cognition

authors： van Heijningen CA,Chen J,van Laatum I,van der Hulst B,ten Cate C

更新日期：2013-03-01 00:00:00

abstract：:To assess the influence of different procedures on chimpanzees' performance in object-choice tasks, five adult chimpanzees were tested using three experimenter-given cues to food location: gazing, glancing, and pointing. These cues were delivered to the subjects in an identical fashion but were deployed within the con...

journal_title：Animal cognition

authors： Barth J,Reaux JE,Povinelli DJ

更新日期：2005-04-01 00:00:00

abstract：:Six rats were trained to find a previously missing target or 'jackpot' object in a square array of four identical or different objects (the test segment of a trial) after first visiting and collecting sunflower seeds from under the other three objects (the study segment of a trial). During training, objects' local pos...

journal_title：Animal cognition

authors： Arain M,Parameswaran V,Cohen J

更新日期：2012-09-01 00:00:00

abstract：:Two-dimensional (2D) displays of real three-dimensional (3D) objects are frequently used experimental tools in animal studies. Whether marmoset monkeys, with their highly diverse and complex anti-predation strategies, readily recognized 2D representations of potential threats has yet to be determined, as seen in other...

journal_title：Animal cognition

authors： Emile N,Barros M

更新日期：2009-09-01 00:00:00

abstract：:Cuttlefish have a large repertoire of body patterns that are used for camouflage and interspecific signaling. Intraspecific signaling by male cuttlefish has been well documented but studies on signaling by females are lacking. We found that females displayed a newly described body pattern termed Splotch toward their m...

journal_title：Animal cognition

authors： Palmer ME,Calvé MR,Adamo SA

更新日期：2006-04-01 00:00:00

abstract：:Although the Piagetian framework has been used by numerous researchers to compare cognitive abilities of diverse species, the system is often criticized as implemented. I examine the various criticisms, suggest ways in which the system can be improved, and argue for the need for descriptive systems such as the Piageti...

journal_title：Animal cognition

authors： Pepperberg IM

更新日期：2002-09-01 00:00:00

abstract：:This study describes how three individual fish, Atlantic cod (Gadus morhua L.), developed a novel behaviour and learnt to use a dorsally attached external tag to activate a self-feeder. This behaviour was repeated up to several hundred times, and over time these fish fine-tuned the behaviour and made a series of goal-...

journal_title：Animal cognition

authors： Millot S,Nilsson J,Fosseidengen JE,Bégout ML,Fernö A,Braithwaite VA,Kristiansen TS

更新日期：2014-05-01 00:00:00

abstract：:Evolutionary theories suggest that ecology is a major factor shaping cognition in primates. However, there have been few systematic tests of spatial memory abilities involving multiple primate species. Here, we examine spatial memory skills in four strepsirrhine primates that vary in level of frugivory: ruffed lemurs ...

journal_title：Animal cognition

authors： Rosati AG,Rodriguez K,Hare B

更新日期：2014-07-01 00:00:00