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| Author |
McBride, S.D.; Cuddeford, D. |
| Title |
The Putative Welfare-Reducing Effects of Preventing Equine Stereotypic Behaviour |
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Journal Article |
| Year |
2001 |
Publication |
Animal Welfare |
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10 |
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173-189 |
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2012 |
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| Author |
Seralini G.-E.; Moslemi S. |
| Title |
Aromatase inhibitors: past, present and future |
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Journal Article |
| Year |
2001 |
Publication |
Molecular and Cellular Endocrinology |
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178 |
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117-131 |
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refbase @ user @ |
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2014 |
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| Author |
Richards, S.A.; de Roos, A.M. |
| Title |
When is habitat assessment an advantage when foraging? |
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Journal Article |
| Year |
2001 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
61 |
Issue |
6 |
Pages |
1101-1112 |
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Foragers can often show a broad range of strategies when searching for resources. The simplest foraging strategy is to search randomly within a habitat; however, foragers can often assess habitat quality over various spatial scales and use this information to keep themselves in, or direct themselves to, regions of high resource abundance or low predation risk. We investigated models that describe a population of consumers competing for a renewable resource that is distributed among discrete patches. Our aim was to identify what foraging strategy or strategies are expected to persist within a population, where strategies differ in the degree of habitat assessment (i.e. none, local, or global). We were interested in how the optimal strategies are dependent on the cost of assessment and habitat structure (i.e. the variation in renewal rates and predation risks among patches). The models showed that the simple random foraging strategy (i.e. make no habitat assessments) often persisted even when the cost of habitat assessment was low. Persistence could occur when habitat assessment and population dynamics generated an ideal free distribution because it could be exploited by the random foragers. Habitat assessment was more advantageous when consumers could not achieve ideal free distributions, which was more likely as patches became less productive. When productivity was low we sometimes observed the situation where different foraging strategies generated resource heterogeneities that promoted their coexistence, and this could occur even when all patches were intrinsically identical. |
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2153 |
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| Author |
McLean, A.N. |
| Title |
Cognitive abilities -- the result of selective pressures on food acquisition? |
Type |
Journal Article |
| Year |
2001 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
71 |
Issue |
3 |
Pages |
241-258 |
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Adaptive intelligence; Animal cognition; Darwinian selection; Insightful learning |
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Locating and capturing food are suggested as significant selection pressures for the evolution of various cognitive abilities in mammals and birds. The hypothesis is proposed that aspects of food procuring behaviour should be strongly indicative of particular cognitive abilities. Experimental data concerning higher mental abilities in mammals and birds are reviewed. These data deal with self-recognition studies, rule-learning experiments, number concept, deceptive abilities, tool-use and observational learning. A Darwinian approach reveals: (1) the adaptiveness of particular abilities for particular niches, (2) that in complex foraging environments, increases in foraging efficiencies in animals should result from the evolution of particular cognitive abilities, (3) that phenomena such as convergent mental evolution should be expected to have taken place across taxonomic groups for species exploiting similar niches, (4) that divergence in mental ability should also have taken place where related species have exploited dissimilar niches. Experimental data of higher mental abilities in animals concur with a Darwinian explanation for the distribution of these cognitive abilities and no anomalies have been found. There are, as a consequence, significant implications for the welfare of animals subject to training when training methodology gives little or no consideration to the various mental abilities of species. |
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Equine Behaviour @ team @ |
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2907 |
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| Author |
Pearce JM; Bouton ME |
| Title |
Theories of associative learning in animals |
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Journal Article |
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2001 |
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Annu. Rev. Psychol. |
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52 |
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111 |
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Equine Behaviour @ team @ |
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3070 |
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Povinelli DJ; Dunphy-Lelii S |
| Title |
Do chimpanzees seek explanations? Preliminary comparative investigations |
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2001 |
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Can. J. Exp. Psychol. |
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55 |
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185 |
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Equine Behaviour @ team @ |
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3071 |
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Santos LR; Hauser MD; Spelke ES |
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Recognition and categorization of biologically significant objects by rhesus monkeys (Macaca mulatta): the domain of food |
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2001 |
Publication |
Cognition |
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82 |
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127 |
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Equine Behaviour @ team @ |
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3073 |
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| Author |
Cook, R.G.; Shaw, R.; Blaisdell, A.P. |
| Title |
Dynamic object perception by pigeons: discrimination of action in video presentations |
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Journal Article |
| Year |
2001 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
4 |
Issue |
3 |
Pages |
137-146 |
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Two experiments examined the discrimination by pigeons of relative motion using computer-generated video stimuli. Using a go/no-go procedure, pigeons were tested with video stimuli in which the camera's perspective went either “around” or “through” an approaching object in a semi-realistic context. Experiment 1 found that pigeons could learn this discrimination and transfer it to videos composed from novel objects. Experiment 2 found that the order of the video's frames was critical to the discrimination of the videos. We hypothesize that the pigeons perceived a three-dimensional representation of the objects and the camera's relative motion and used this as the primary basis for discrimination. It is proposed that the pigeons might be able to form generalized natural categories for the different kinds of motions portrayed in the videos. |
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Equine Behaviour @ team @ |
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3142 |
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De Lillo,; C. De Lillo; Floreano,; D. Floreano; Antinucci,; F. Antinucci |
| Title |
Transitive choices by a simple, fully connected, backpropagation neural network: implications for the comparative study of transitive inference |
Type |
Journal Article |
| Year |
2001 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
4 |
Issue |
1 |
Pages |
61-68 |
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In search of the minimal requirements for transitive reasoning, a simple neural network was trained and tested on the non-verbal version of the conventional “five-term-series task” – a paradigm used with human adults, children and a variety of non-human species. The transitive performance of the network was analogous in several aspects to that reported for children and animals. The three effects usually associated with transitive choices i.e. “symbolic distance”, “lexical marking” and “end-anchor”, were also clearly shown by the neural network. In a second experiment, where the training conditions were manipulated, the network failed to match the behavioural pattern reported for human adults in the test following an ordered presentation of the premises. However, it mimicked young children's performance when tested with a novel comparison term. Although we do not intend to suggest a new model of transitive inference, we conclude, in line with other authors, that a simple error-correcting rule can generate transitive behaviour similar to the choice pattern of children and animals in the binary form of the five-term-series task without requiring high-order logical or paralogical abilities. The analysis of the training history and of the final internal structure of the network reveals the associative strategy employed. However, our results indicate that the scope of the associative strategy used by the network might be limited. The extent to which the conventional five-term-series task, in absence of appropriate manipulations of training and testing conditions, is suitable to detect cognitive differences across species is also discussed on the basis of our results. |
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Equine Behaviour @ team @ |
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3145 |
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Cordeiro de Sousa, M.; Xavier, N.; Alves da Silva, H.; Souza de Oliveira, M.; Yamamoto, M. |
| Title |
Hand preference study in marmosets ( Callithrix jacchus ) using food reaching tests |
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Journal Article |
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2001 |
Publication |
Primates |
Abbreviated Journal |
Primates |
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42 |
Issue |
1 |
Pages |
57-66 |
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Abstract Hand preference has been investigated in New World primates but the data obtained thus far are controversial. In this study we investigated hand preference in common marmosets,Callithrix jacchus, during the execution of a reaching for food task. We used 46 adult common marmoset males (n=27) and females (n=19) from the Universidade of Rio Grande do Norte colony, both wild and captive-born. To test the hand preference we used a device measuring 10 cm2, with a central hole 1 cm in diameter, to force the animal to use only one hand to reach for food on a food dish located underneath. Each animal was tested 5 times and had to make a maximum of 20 successful attempts per session. A total of 100 successful attempts per animal and 4,600 successful attempts for all animals were recorded during the experiment. Latency and duration of the sessions were measured and we found preference for the use of one of the hands in common marmoset individuals, i.e. 45 of total of 46 animals used significantly more the right or the left hand when performing the task. However no bias at the population level was found. Females born in captivity presented an increase in the duration of latency for the first successful attempt and in the total duration of the test sessions. These findings might be indicating differences associated with a natural tendency for females to be more selective and to spend more time exploring alimentary sources. Additionally, captive-born females may have a constrain in developing cognitive abilities regarding foraging since they have food available during most part of the time. |
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Equine Behaviour @ team @ |
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3149 |
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