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| Author |
Thompson, R.N.; Robertson, B.K.; Napier, A.; Wekesa, K.S. |
| Title |
Sex-specific Responses to Urinary Chemicals by the Mouse Vomeronasal Organ |
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Journal Article |
| Year |
2004 |
Publication |
Chem. Senses |
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| Volume |
29 |
Issue |
9 |
Pages |
749-754 |
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| Abstract |
Social behaviors of most mammals are affected by chemical signals, pheromones, exchanged between conspecifics. Previous experiments have shown that behavioral responses to the same pheromone differ depending on the sex and endocrine status of the respondent. Although the exact mechanism of this dimorphism is not known, one possible contributor may be due to sexually dimorphic receptors or due to differences in central processing within the brain. In order to investigate the differences in response between male and female mice to the same pheromonal stimulus two urinary compounds (2-heptanone and 2,5-dimethylpyrazine) were used to stimulate the production of Inositol (1,4,5)-trisphosphate (IP3) in microvillar membrane preparations of the vomeronasal organ as an indirect measurement of pheromonal stimulation. Incubation of such membranes from prepubertal mice with urine from the same sex or opposite sex, results in an increase in production of IP3. This stimulation is mimicked by GTP{gamma}S and blocked by GDP{beta}S. Furthermore we found that 2-heptanone present in both male and female urine was capable of stimulating increased production of IP3 in the female VNO but not the male VNO. Finally, 2,5-dimethylpyrazine present only in female urine was also only capable of stimulating increased production of IP3 in the female VNO. |
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10.1093/chemse/bjh076 |
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Equine Behaviour @ team @ |
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4428 |
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| Author |
McGreevy, P.D. |
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Book Whole |
| Year |
2004 |
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Equine Behavior: A Guide for Veterinarians and Equine Scientists |
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Cited By (since 1996): 25; Export Date: 21 October 2008 |
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no |
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Equine Behaviour @ team @ |
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4530 |
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Nakagawa, S.; Waas, J.R. |
| Title |
'O sibling, where art thou?' – A review of avian sibling recognition with respect to the mammalian literature |
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Journal Article |
| Year |
2004 |
Publication |
Biological Reviews of the Cambridge Philosophical Society |
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| Volume |
79 |
Issue |
1 |
Pages |
101-119 |
| Keywords |
Birds; Direct familiarisation; Indirect familiarisation; Individual recognition; Kin discrimination; Kin recognition; Mammals; Sibling recognition |
| Abstract |
Avian literature on sibling recognition is rare compared to that developed by mammalian researchers. We compare avian and mammalian research on sibling recognition to identify why avian work is rare, how approaches differ and what avian and mammalian researchers can learn from each other. Three factors: (1) biological differences between birds and mammals, (2) conceptual biases and (3) practical constraints, appear to influence our current understanding. Avian research focuses on colonial species because sibling recognition is considered adaptive where 'mixing potential' of dependent young is high; research on a wider range of species, breeding systems and ecological conditions is now needed. Studies of acoustic recognition cues dominate avian literature; other types of cues (e.g. visual, olfactory) deserve further attention. The effect of gender on avian sibling recognition has yet to be investigated; mammalian work shows that gender can have important influences. Most importantly, many researchers assume that birds recognise siblings through 'direct familiarisation' (commonly known as associative learning or familiarity); future experiments should also incorporate tests for 'indirect familiarisation' (commonly known as phenotype matching). If direct familiarisation proves crucial, avian research should investigate how periods of separation influence sibling discrimination. Mammalian researchers typically interpret sibling recognition in broad functional terms (nepotism, optimal outbreeding); some avian researchers more successfully identify specific and testable adaptive explanations, with greater relevance to natural contexts. We end by reporting exciting discoveries from recent studies of avian sibling recognition that inspire further interest in this topic. |
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Department of Biological Sciences, University Waikato, Private Bag 3105, Hamilton, New Zealand |
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Cited By (since 1996): 9; Export Date: 23 October 2008; Source: Scopus |
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no |
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Equine Behaviour @ team @ |
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4567 |
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McLean, A.N. |
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The mental processes of the horse and their consequences for training |
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2004 |
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Animal Welfare Science Centre |
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Cited By (since 1996): 1; Export Date: 24 October 2008 |
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no |
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Admin @ knut @ |
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4619 |
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| Author |
Kaminski, J.; Call, J.; Fischer, J. |
| Title |
Word Learning in a Domestic Dog: Evidence for “Fast Mapping” |
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Journal Article |
| Year |
2004 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
304 |
Issue |
5677 |
Pages |
1682-1683 |
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During speech acquisition, children form quick and rough hypotheses about the meaning of a new word after only a single exposure--a process dubbed “fast mapping.” Here we provide evidence that a border collie, Rico, is able to fast map. Rico knew the labels of over 200 different items. He inferred the names of novel items by exclusion learning and correctly retrieved those items right away as well as 4 weeks after the initial exposure. Fast mapping thus appears to be mediated by general learning and memory mechanisms also found in other animals and not by a language acquisition device that is special to humans. |
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10.1126/science.1097859 |
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no |
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Equine Behaviour @ team @ |
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4678 |
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Friederici, A.D.; Alter, K. |
| Title |
Lateralization of auditory language functions: a dynamic dual pathway model |
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Journal Article |
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2004 |
Publication |
Brain and Language |
Abbreviated Journal |
Brain Lang |
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89 |
Issue |
2 |
Pages |
267-276 |
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Auditory Pathways/physiology; Brain Mapping; Comprehension/*physiology; Dominance, Cerebral/*physiology; Frontal Lobe/*physiology; Humans; Nerve Net/physiology; Phonetics; Semantics; Speech Acoustics; Speech Perception/*physiology; Temporal Lobe/*physiology |
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Spoken language comprehension requires the coordination of different subprocesses in time. After the initial acoustic analysis the system has to extract segmental information such as phonemes, syntactic elements and lexical-semantic elements as well as suprasegmental information such as accentuation and intonational phrases, i.e., prosody. According to the dynamic dual pathway model of auditory language comprehension syntactic and semantic information are primarily processed in a left hemispheric temporo-frontal pathway including separate circuits for syntactic and semantic information whereas sentence level prosody is processed in a right hemispheric temporo-frontal pathway. The relative lateralization of these functions occurs as a result of stimulus properties and processing demands. The observed interaction between syntactic and prosodic information during auditory sentence comprehension is attributed to dynamic interactions between the two hemispheres. |
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Max Planck Institute of Cognitive Neuroscience, P.O. Box 500 355, 04303 Leipzig, Germany. angelafr@cns.mpg.de |
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English |
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0093-934X |
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PMID:15068909 |
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no |
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Equine Behaviour @ team @ |
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4722 |
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Lefebvre, L.; Reader, S.M.; Sol, D. |
| Title |
Brains, Innovations and Evolution in Birds and Primates |
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Journal Article |
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2004 |
Publication |
Brain, Behavior and Evolution |
Abbreviated Journal |
Brain. Behav. Evol. |
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63 |
Issue |
4 |
Pages |
233-246 |
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Innovation W Brain evolution W Hyperstriatum ventrale W Neostriatum W Isocortex W Birds W Primates W Tool use W Invasion biology |
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Abstract
Several comparative research programs have focusedon the cognitive, life history and ecological traits thataccount for variation in brain size. We review one ofthese programs, a program that uses the reported frequencyof behavioral innovation as an operational measureof cognition. In both birds and primates, innovationrate is positively correlated with the relative size of associationareas in the brain, the hyperstriatum ventrale andneostriatum in birds and the isocortex and striatum inprimates. Innovation rate is also positively correlatedwith the taxonomic distribution of tool use, as well asinterspecific differences in learning. Some features ofcognition have thus evolved in a remarkably similar wayin primates and at least six phyletically-independent avianlineages. In birds, innovation rate is associated withthe ability of species to deal with seasonal changes in theenvironment and to establish themselves in new regions,and it also appears to be related to the rate atwhich lineages diversify. Innovation rate provides a usefultool to quantify inter-taxon differences in cognitionand to test classic hypotheses regarding the evolution ofthe brain. |
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0006-8977 |
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no |
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Equine Behaviour @ team @ |
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4738 |
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| Author |
De Sousa, R. |
| Title |
Rational Animals |
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Journal Article |
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2004 |
Publication |
Croatian Journal of Philosophy |
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4 |
Issue |
12 |
Pages |
365-386 |
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I begin with a rather unpromising dispute that Nozick once had with Ian Hacking in the pages of the London Review of Books, in which both vied with one another in their enthusiasm to repudiate the thesis that some human people or peoples are closer than others to animality. I shall attempt to show that one can build, on the basis of Nozick’s discussion of rationality, a defense of the view that the capacity for language places human rationality out of reach of a comparison with animals. The difference rests, paradoxi–cally, on the human capacity for irrationality. Irrationality depends on the capacity for language, which allows the detachment of explicit thoughts from their underlying dynamic implementation; these, in turn, condition the essential disputability of principles of rationality. That is what places every human potentially—if not actually—on the other side of an unbridge–able gulf that separates us from other animals. |
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no |
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Equine Behaviour @ team @ |
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4790 |
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Virányi, Z.; Topál, J.; Gácsi, M.; Miklósi, Á.; Csányi, V. |
| Title |
Dogs respond appropriately to cues of humans' attentional focus |
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Journal Article |
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2004 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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66 |
Issue |
2 |
Pages |
161-172 |
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Animals; *Attention; Bonding, Human-Pet; Communication; *Cues; Dogs; Humans; Recognition (Psychology) |
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Dogs' ability to recognise cues of human visual attention was studied in different experiments. Study 1 was designed to test the dogs' responsiveness to their owner's tape-recorded verbal commands (Down!) while the Instructor (who was the owner of the dog) was facing either the dog or a human partner or none of them, or was visually separated from the dog. Results show that dogs were more ready to follow the command if the Instructor attended them during instruction compared to situations when the Instructor faced the human partner or was out of sight of the dog. Importantly, however, dogs showed intermediate performance when the Instructor was orienting into 'empty space' during the re-played verbal commands. This suggests that dogs are able to differentiate the focus of human attention. In Study 2 the same dogs were offered the possibility to beg for food from two unfamiliar humans whose visual attention (i.e. facing the dog or turning away) was systematically varied. The dogs' preference for choosing the attentive person shows that dogs are capable of using visual cues of attention to evaluate the human actors' responsiveness to solicit food-sharing. The dogs' ability to understand the communicatory nature of the situations is discussed in terms of their social cognitive skills and unique evolutionary history. |
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Department of Ethology, Eotvos Lorand University, Budapest, Hungary. zsofi.viranyi@freemail.hu |
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0376-6357 |
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PMID:15110918 |
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no |
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Equine Behaviour @ team @ |
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4957 |
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Pack, A. A.; Herman, L. M. |
| Title |
Bottlenosed Dolphins (Tursiops truncatus) Comprehend the Referent of Both Static and Dynamic Human Gazing and Pointing in an Object-Choice Task. |
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Journal Article |
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2004 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J. Comp. Psychol. |
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118 |
Issue |
2 |
Pages |
160-171 |
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The authors tested 2 bottlenosed dolphins (Tursiops truncatus) for their understanding of human-directed gazing or pointing in a 2-alternative object-choice task. A dolphin watched a human informant either gazing at or pointing toward 1 of 2 laterally placed objects and was required to perform a previously indicated action to that object. Both static and dynamic gaze, as well as static and dynamic direct points and cross-body points, yielded errorless or nearly errorless performance. Gaze with the informant's torso obscured (only the head was shown) produced no performance decrement, but gaze with eyes only resulted in chance performance. The results revealed spontaneous understanding of human gaze accomplished through head orientation, with or without the human informant's eyes obscured, and demonstrated that gaze-directed cues were as effective as point-directed cues in the object-choice task. (PsycINFO Database Record (c) 2009 APA, all rights reserved) |
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Equine Behaviour @ team @ |
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4976 |
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