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Author |
Albentosa, M.J.; Kjaer, J.B.; Nicol, C.J. |
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Title |
Strain and age differences in behaviour, fear response and pecking tendency in laying hens |
Type |
Journal Article |
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Year |
2003 |
Publication |
British poultry science |
Abbreviated Journal |
Br Poult Sci |
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Volume |
44 |
Issue |
3 |
Pages |
333-344 |
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Keywords |
Age Factors; Aggression/*physiology; Animal Husbandry; Animals; *Behavior, Animal; Breeding; Chickens/genetics/*physiology; Fear/*physiology; Feathers/*injuries; Female; Housing, Animal; Population Density; Social Behavior |
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Abstract |
1. Behaviours associated with a high or low tendency to feather peck could be used as predictors of feather pecking behaviour in selective breeding programmes. This study investigated how strain and age at testing influenced responses in behavioural tests. 2. Four layer-type strains (ISA Brown, Columbian Blacktail, Ixworth and a high feather pecking (HP) and a low feather pecking (LP) line of White Leghorn) were reared in 6 same-strain/line pens of 8 birds from one day old. Birds in half the pens were given an open field test, a novel object test and a test with loose feather bundles between 4 and 12 weeks of age and a tonic immobility (TI) test at 13 weeks of age. All pens were tested with fixed feather bundles at 26 weeks, and undisturbed behaviour in the home pens was videoed at 1 and 27 weeks of age. Daily records of plumage damage were used as an indicator of feather pecking activity in the home pens. 3. Strain did not influence novel object test, open field test or loose feather test behaviour, although age effects in all three tests indicated a reduction in fearfulness and/or an increase in exploratory behaviour with increasing age. 4. White Leghorns showed longer TI durations than the other strains but less pecking at fixed feather bundles than ISA Browns and Columbian Blacktails. 5. There were few associations between behaviour in the 5 different tests, indicating that birds did not have overall behavioural traits that were consistent across different contexts. This suggests hens cannot easily be categorised into different behavioural 'types', based on their test responses and casts doubt on the usefulness of tests as predictors of feather pecking. |
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Centre for Behavioural Biology, Division of Farm Animal Science, University of Bristol, Langford, Bristol, England. MAlbentosa@lincoln.ac.uk |
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0007-1668 |
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PMID:13677322 |
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refbase @ user @ |
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80 |
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Author |
Brosnan, S.F.; De Waal, F.B.M. |
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Title |
Monkeys reject unequal pay |
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Journal Article |
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Year |
2003 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
425 |
Issue |
6955 |
Pages |
297-299 |
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Keywords |
Aging; Animals; Cebus/*psychology; Choice Behavior; *Cooperative Behavior; Female; Male; *Reward; Social Justice |
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Abstract |
During the evolution of cooperation it may have become critical for individuals to compare their own efforts and pay-offs with those of others. Negative reactions may occur when expectations are violated. One theory proposes that aversion to inequity can explain human cooperation within the bounds of the rational choice model, and may in fact be more inclusive than previous explanations. Although there exists substantial cultural variation in its particulars, this 'sense of fairness' is probably a human universal that has been shown to prevail in a wide variety of circumstances. However, we are not the only cooperative animals, hence inequity aversion may not be uniquely human. Many highly cooperative nonhuman species seem guided by a set of expectations about the outcome of cooperation and the division of resources. Here we demonstrate that a nonhuman primate, the brown capuchin monkey (Cebus apella), responds negatively to unequal reward distribution in exchanges with a human experimenter. Monkeys refused to participate if they witnessed a conspecific obtain a more attractive reward for equal effort, an effect amplified if the partner received such a reward without any effort at all. These reactions support an early evolutionary origin of inequity aversion. |
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Living Links, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia 30329, USA. sbrosna@emory.edu |
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1476-4687 |
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PMID:13679918 |
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refbase @ user @ |
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179 |
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Author |
Sousa, C.; Okamoto, S.; Matsuzawa, T. |
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Title |
Behavioural development in a matching-to-sample task and token use by an infant chimpanzee reared by his mother |
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Journal Article |
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Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
6 |
Issue |
4 |
Pages |
259-267 |
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Keywords |
Animals; *Cognition; *Discrimination Learning; Female; *Imitative Behavior; Male; Mothers/*psychology; Pan troglodytes/*growth & development/*psychology; *Transfer (Psychology) |
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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 experiment performed by his mother. The task consisted of two phases, a matching-to-sample task in which she received token rewards, and the insertion of these tokens into a vending machine to obtain food rewards. Ayumu himself received no reward or encouragement from humans for any of the actions he exhibited during the experiment. At the age of 9 months and 3 weeks, Ayumu performed his first matching-to-sample trial. At around 1 year and 3 months, he began to perform them consistently. Also during this period, he frequently stole food rewards from his mother. At 2 years and 3 months, Ayumu succeeded for the first time in inserting a token into the vending machine. Once he had succeeded in using a token, he performed both phases of the task in sequence 20 times consecutively. The infant's behaviour was not shaped by food rewards but by a strong motivation to copy his mother's behaviour. Our observations of Ayumu thus mirror the learning processes shown by wild chimpanzees. |
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Address |
Primate Research Institute, Kyoto University, Inuyama Aichi 484-8506, Japan. csousa@fcsh.unl.pt |
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1435-9448 |
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PMID:13680400 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2556 |
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Author |
Hirata, S.; Celli, M.L. |
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Title |
Role of mothers in the acquisition of tool-use behaviours by captive infant chimpanzees |
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Journal Article |
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Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
6 |
Issue |
4 |
Pages |
235-244 |
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Keywords |
Animals; Cooking and Eating Utensils; Feeding Behavior; Female; Imitative Behavior/*physiology; Male; Mothers/*psychology; Motor Skills/*physiology; Pan troglodytes/*growth & development/*psychology; Problem Solving/*physiology |
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This article explores the maternal role in the acquisition of tool-use behaviours by infant chimpanzees ( Pan troglodytes). A honey-fishing task, simulating ant/termite fishing found in the wild, was introduced to three dyads of experienced mother and naive infant chimpanzees. Four fishing sites and eight sets of 20 objects to be used as tools, not all appropriate, were available. Two of the mothers constantly performed the task, using primarily two kinds of tools; the three infants observed them. The infants, regardless of the amount of time spent observing, successfully performed the task around the age of 20-22 months, which is earlier than has been recorded in the wild. Two of the infants used the same types of tools that the adults predominantly used, suggesting that tool selectivity is transmitted. The results also show that adults are tolerant of infants, even if unrelated; infants were sometimes permitted to lick the tools, or were given the tools, usually without honey, as well as permitted to observe the adult performances closely. |
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Address |
Primate Research Institute, Kyoto University, Inuyama, Kanrin, 484-8506 Aichi, Japan. hirata@gari.be.to |
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1435-9448 |
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Notes |
PMID:13680401 |
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Call Number |
Equine Behaviour @ team @ |
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2555 |
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Author |
Roitberg, E.; Franz, H. |
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Title |
Oddity learning by African dwarf goats ( Capra hircus) |
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Journal Article |
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Year |
2004 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
7 |
Issue |
1 |
Pages |
61-67 |
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Keywords |
Animals; *Cues; Female; Goats/*physiology; *Pattern Recognition, Visual; *Task Performance and Analysis |
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Abstract |
Seventeen African dwarf goats (adult females) were trained on oddity tasks using an automated learning device. One odd stimulus and three identical nonodd stimuli were presented on a screen divided into four sectors; the sector for the odd stimulus was varied pseudorandomly. Responses to the odd stimulus were deemed to be correct and were reinforced with food. In phase 1, the goats were trained on eight stimulus configurations. From trial to trial the odd discriminandum was either a + symbol or the letter S, and the nonodd discriminandum was the symbol not used as the odd one. In phase 2, the animals were similarly trained using an unfilled triangle or a filled (i.e., solid black) circle. In phase 3, three new discriminanda were used, an unfilled, small circle with radiating lines, an unfilled heart-shaped symbol, and an unfilled oval; which of the three discriminanda was odd and nonodd was varied from trial to trial. Following these training phases, a transfer test was given, which involved 24 new discriminanda sets. These were presented twice for a total of 48 transfer test trials. Results early in training showed approximately 25% correct, which might be expected by chance in a four-choice task. After 500-2,000 trials, results improved to approximately 40-44% correct. The best-performing subject reached 60-80% correct during training. On the transfer test, this subject had 47.9% correct and that significantly exceeded 25% expected by chance. This finding suggests that some exceptional individuals of African dwarf goats are capable of learning the oddity concept. |
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Address |
Forschungsinstitut fur die Biologie landwirtschaftlicher Nutztiere, Wilhelm-Stahl-Allee 2, D-18196 Dummerstorf, Germany. Roitberg@fbn-dummerstorf.de |
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1435-9448 |
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Notes |
PMID:13680403 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2554 |
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Author |
Clark, M.L.; Ayers, M. |
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Title |
Friendship similarity during early adolescence: gender and racial patterns |
Type |
Journal Article |
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Year |
1992 |
Publication |
The Journal of Psychology |
Abbreviated Journal |
J Psychol |
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Volume |
126 |
Issue |
4 |
Pages |
393-405 |
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Keywords |
Achievement; Adolescent; African Americans/*psychology; *Cross-Cultural Comparison; Female; *Gender Identity; Humans; Individuality; *Interpersonal Relations; Male; *Personality Development; Personality Inventory; Sociometric Techniques |
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Abstract |
We studied the relationship of reciprocity, gender, and racial composition (Caucasian, African American, cross-race) of adolescent friendship dyads to similarity and proximity in 136 young adolescents. We found that adolescents selected friends who were of the same gender and race and that female dyads were more similar than male dyads on verbal achievement and several personality dimensions. Caucasian dyads were more similar than African American dyads on verbal achievement, mental alertness, and dominance. African American adolescents had more contact with their best friends outside school, whereas Caucasian adolescent friends had more in-school contact. African American students had fewer reciprocal relationships than the Caucasian students. Cross-race friendships were less reciprocal than same-race friendships. Race and gender were important in determining friendship patterns. Similarity and proximity were more important than reciprocity in understanding early adolescent friendships. |
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Department of Psychology, Virginia Commonwealth University |
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English |
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0022-3980 |
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Notes |
PMID:1403972 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5628 |
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Author |
Dvoinos, G.M.; Kharchenko, V.A.; Zviagnitsova, N.S. |
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Title |
The characteristics of the helminth community in the Turkmen kulan (Equus hemionus) |
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Journal Article |
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Year |
1992 |
Publication |
Parazitologiia |
Abbreviated Journal |
Parazitologiia |
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Volume |
26 |
Issue |
3 |
Pages |
246-251 |
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Keywords |
Animals; Female; Helminthiasis/parasitology; Helminthiasis, Animal; Helminths/classification/*isolation & purification; Male; Perissodactyla/*parasitology; Turkmenistan; Ukraine |
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Abstract |
The helminth fauna of 24 kulans from Askaniya-Nova and Badkhyz was studied. 42 species of helminths were found, 34 of which belong to strongylids. The helminth species composition of kulan is similar to that of other species of horses. This is a result of an intensive parasite exchange in the historical past when numerous populations of different Equidae species made long seasonal migrations over steppe inter-river lands of Asia and grazed for some time on common pastures. |
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Russian |
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K kharakteristike soobshchestva gel'mintov turkmenskogo kulana (Equus hemionus) |
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0031-1847 |
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PMID:1408368 |
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Call Number |
Equine Behaviour @ team @ |
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2285 |
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Author |
Seyfarth, R.M.; Cheney, D.L. |
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Title |
Meaning and mind in monkeys |
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Journal Article |
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Year |
1992 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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Volume |
267 |
Issue |
6 |
Pages |
122-128 |
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Keywords |
Animals; Behavior, Animal; Female; *Haplorhini; Male; Speech; *Vocalization, Animal |
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Address |
University of Pennsylvania |
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0036-8733 |
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PMID:1439710 |
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refbase @ user @ |
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701 |
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Author |
Call, J.; Brauer, J.; Kaminski, J.; Tomasello, M. |
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Title |
Domestic dogs (Canis familiaris) are sensitive to the attentional state of humans |
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Journal Article |
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Year |
2003 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
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Volume |
117 |
Issue |
3 |
Pages |
257-263 |
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Keywords |
Animals; *Appetitive Behavior; *Attention; *Bonding, Human-Pet; *Concept Formation; Cues; Dogs/*psychology; Female; Humans; *Inhibition (Psychology); Male; Nonverbal Communication |
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Abstract |
Twelve domestic dogs (Canis familiaris) were given a series of trials in which they were forbidden to take a piece of visible food. In some trials, the human continued to look at the dog throughout the trial (control condition), whereas in others, the human (a) left the room, (b) turned her back, (c) engaged in a distracting activity, or (d) closed her eyes. Dogs behaved in clearly different ways in most of the conditions in which the human did not watch them compared with the control condition, in which she did. In particular, when the human looked at them, dogs retrieved less food, approached it in a more indirect way, and sat (as opposed to laid down) more often than in the other conditions. Results are discussed in terms of domestic dogs' social-cognitive skills and their unique evolutionary and ontogenetic histories. |
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Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany. call@eva.mpg.de |
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Washington, D.C. : 1983 |
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English |
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0735-7036 |
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PMID:14498801 |
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refbase @ user @ |
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713 |
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Author |
Stoinski, T.S.; Whiten, A. |
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Title |
Social learning by orangutans (Pongo abelii and Pongo pygmaeus) in a simulated food-processing task |
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Journal Article |
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Year |
2003 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
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Volume |
117 |
Issue |
3 |
Pages |
272-282 |
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Keywords |
*Animal Communication; Animals; *Feeding Behavior; Female; *Imitative Behavior; Male; Pongo pygmaeus/*psychology; Problem Solving; Psychomotor Performance; Social Environment; Species Specificity; *Transfer (Psychology) |
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Abstract |
Increasing evidence for behavioral differences between populations of primates has created a resurgence of interest in examining mechanisms of information transfer between individuals. The authors examined the social transmission of information in 15 captive orangutans (Pongo abelii and Pongo pygmaeus) using a simulated food-processing task. Experimental subjects were shown 1 of 2 methods for removing a suite of defenses on an “artificial fruit.” Control subjects were given no prior exposure before interacting with the fruit. Observing a model provided a functional advantage in the task, as significantly more experimental than control subjects opened the fruit. Within the experimental groups, the authors found a trend toward differences in the actual behaviors used to remove 1 of the defenses. Results support observations from the wild implying horizontal transfer of information in orangutans and show that a number of social learning processes are likely to be involved in the transfer of knowledge in this species. |
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Department of Primate Research, Zoo Atlanta, Atlanta, GA 30315, USA. tstoinski@zooatlanta.org |
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0735-7036 |
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PMID:14498803 |
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refbase @ user @ |
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737 |
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