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Author  |
Milo, R.; Itzkovitz, S.; Kashtan, N.; Levitt, R.; Alon, U. |
| Title |
Response to Comment on “Network Motifs: Simple Building Blocks of Complex Networks” and “Superfamilies of Evolved and Designed Networks” |
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Journal Article |
| Year |
2004 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
305 |
Issue |
5687 |
Pages |
1107d |
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10.1126/science.1100519 |
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Equine Behaviour @ team @ |
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5031 |
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Millspaugh, J.J.; Brundige, G.C.; Gitzen, R.A.; Raedeke, K.J. |
| Title |
Herd organization of cow elk in Custer State Park, South Dakota |
Type |
Journal Article |
| Year |
2004 |
Publication |
Wildlife Society Bulletin |
Abbreviated Journal |
Wildl Soc Bull |
| Volume |
32 |
Issue |
2 |
Pages |
506-514 |
| Keywords |
Cervus elaphus nelsoni, home range, kernel, Rocky Mountain Elk, social organization, subherd, utilization distribution, volume of intersection |
| Abstract |
nderstanding herd organization is important when considering management alternatives designed to benefit or manipulate elk (Cervus elaphus) populations. We studied the seasonal and annual herd organization of cow elk in Custer State Park, South Dakota from 1993-1997 by examining seasonal subherd range size, spatial arrangement, overlap, and site fidelity. Based on social interaction analyses, we combined locations of radiocol-lared cow elk to delineate subherds. We computed 95% kernel home ranges with least-squares cross validation for each subherd by season and year. Subherd overlap and fidelity by season and year were computed using the Volume of Intersection Index (VI) statistic. We identified 5 relatively discrete, resident cow-calf subherds. We observed little overlap in utilization distributions of adjacent subherds. The mean VI score across all subherds and time points (n=140) was 0.06 (SE=0.009), indicating an average 6% overlap in subherd area utilization. Subherd overlap between pairs was 0.08 in fall (SE= 0.021), 0.06 in winter (SE=0.018), 0.06 in spring (SE=0.2), and 0.05 in summer (SE= 0.016). Range sizes were not different between any pairs of seasons or years (F13,52=0.7, P=0.75). Subherd fidelity ranged from 0.41 (SE=0.033) to 0.60 (SE=0.018) overall, indicating differential use within the subherd boundary across years. The ability to distinguish discrete cow-calf subherd units is consistent with other studies and may aid elk management in Custer State Park. However, use patterns within subherd boundaries were inconsistent across years and may reflect human disturbances (e.g., hunting and logging activities), differences in our sampling approach, or changes in matriarchal leadership. Further evaluation into factors affecting space-use patterns is necessary to predict changes in range use within the subherd boundary. |
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2065 |
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Miklósi, Á.; Topál, J.; Csányi, V. |
| Title |
Comparative social cognition: what can dogs teach us? |
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Journal Article |
| Year |
2004 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
67 |
Issue |
6 |
Pages |
995-1004 |
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Research in comparative social cognition addresses how challenges of social living have formed the cognitive structures that control behaviours involved in communication, social learning and social understanding. In contrast to the traditional psychological approach, recent investigations take both evolutionary and functional questions into account, but the main emphasis is still on the mechanisms of behaviour. Although in traditional research `comparative' meant mainly comparisons between humans and other primates, ethological influences have led to a broadening of the spectrum of species under study. In this review, we evaluated how the study of dogs broadens our understanding of comparative social cognition. In the early days of ethology, dogs enjoyed considerable interest from ethologists, but during the last 20 years, dogs have rarely been studied by ethological methods. Through a complex evolutionary process, dogs became adapted for living in human society; therefore, the human environment and social setting now represents a natural ecological niche for this species. We have evidence that dogs have been selected for adaptations to human social life, and that these adaptations have led to marked changes in their communicative, social, cooperative and attachment behaviours towards humans. Until now, the study of dogs was hindered by the view that they represent an `artificial' species, but by accepting that dogs are adapted to their niche, as are other `natural' species, comparative investigations can be put into new light. |
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refbase @ user @ |
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406 |
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Merchant, H.; Fortes, A.F.; Georgopoulos, A.P. |
| Title |
Short-term memory effects on the representation of two-dimensional space in the rhesus monkey |
Type |
Journal Article |
| Year |
2004 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
7 |
Issue |
3 |
Pages |
133-143 |
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Analysis of Variance; Animals; Discrimination Learning/*physiology; Macaca mulatta; Male; Memory, Short-Term/*physiology; Mental Processes/*physiology; Pattern Recognition, Visual/*physiology; Space Perception/*physiology |
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Human subjects represent the location of a point in 2D space using two independent dimensions (x-y in Euclidean or radius-angle in polar space), and encode location in memory along these dimensions using two levels of representation: a fine-grain value and a category. Here we determined whether monkeys possessed the ability to represent location with these two levels of coding. A rhesus monkey was trained to reproduce the location of a dot in a circle by pointing, after a delay period, on the location where a dot was presented. Five different delay periods (0.5-5 s) were used. The results showed that the monkey used a polar coordinate system to represent the fine-grain spatial coding, where the radius and angle of the dots were encoded independently. The variability of the spatial response and reaction time increased with longer delays. Furthermore, the animal was able to form a categorical representation of space that was delay-dependent. The responses avoided the circumference and the center of the circle, defining a categorical radial prototype around one third of the total radial length. This radial category was observed only at delay durations of 3-5 s. Finally, the monkey also formed angular categories with prototypes at the obliques of the quadrants of the circle, avoiding the horizontal and vertical axes. However, these prototypes were only observed at the 5-s delay and on dots lying on the circumference. These results indicate that monkeys may possess spatial cognitive abilities similar to humans. |
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Brain Sciences Center (11B), Veterans Affairs Medical Center, One Veterans Drive, MN 55417, Minneapolis, USA |
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1435-9448 |
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PMID:14669074 |
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no |
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Equine Behaviour @ team @ |
Serial |
2548 |
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Mendl, M.; Paul, E.S. |
| Title |
Consciousness, emotion and animal welfare: insights from cognitive science |
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Journal Article |
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2004 |
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Animal Welfare |
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13 |
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17-25 |
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refbase @ user @ |
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3512 |
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| Author |
Mellor, P.S.; Hamblin, C. |
| Title |
African horse sickness |
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Journal Article |
| Year |
2004 |
Publication |
Veterinary Research |
Abbreviated Journal |
Vet Res |
| Volume |
35 |
Issue |
4 |
Pages |
445-466 |
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African Horse Sickness/epidemiology/*prevention & control/*transmission/virology; African horse sickness virus/pathogenicity; Animals; Culicidae; Europe/epidemiology; Horses; Insect Vectors |
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African horse sickness virus (AHSV) causes a non-contagious, infectious insect-borne disease of equids and is endemic in many areas of sub-Saharan Africa and possibly Yemen in the Arabian Peninsula. However, periodically the virus makes excursions beyond its endemic areas and has at times extended as far as India and Pakistan in the east and Spain and Portugal in the west. The vectors are certain species of Culicoides biting midge the most important of which is the Afro-Asiatic species C. imicola. This paper describes the effects that AHSV has on its equid hosts, aspects of its epidemiology, and present and future prospects for control. The distribution of AHSV seems to be governed by a number of factors including the efficiency of control measures, the presence or absence of a long term vertebrate reservoir and, most importantly, the prevalence and seasonal incidence of the major vector which is controlled by climate. However, with the advent of climate-change the major vector, C. imicola, has now significantly extended its range northwards to include much of Portugal, Spain, Italy and Greece and has even been recorded from southern Switzerland. Furthermore, in many of these new locations the insect is present and active throughout the entire year. With the related bluetongue virus, which utilises the same vector species of Culicoides this has, since 1998, precipitated the worst outbreaks of bluetongue disease ever recorded with the virus extending further north in Europe than ever before and apparently becoming endemic in that continent. The prospects for similar changes in the epidemiology and distribution of AHSV are discussed. |
| Address |
Institute for Animal Health, Department of Arbovirology, Pirbright Laboratory, Ash Rd., Pirbright, Woking, Surrey, GU24 0NF, United Kingdom. philip.mellor@bbsrc.ac.uk |
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0928-4249 |
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PMID:15236676 |
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Equine Behaviour @ team @ |
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2358 |
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McLean, A.N. |
| Title |
Short-term spatial memory in the domestic horse |
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Journal Article |
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2004 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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85 |
Issue |
1-2 |
Pages |
93-105 |
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Animal cognition; Delayed response; Equine memory; Horse; Object permanence; Temporal cognition |
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This study investigates the ability of horses to recall a feeding event in a two-point choice apparatus. Twelve horses were individually tested whereby they were maintained immobile in a test arena and visually and aurally experienced the delivery of food into one of two feed goals. The horses were then released to make their choice in two experimental contexts: immediate release after experiencing the delivery of food, and release 10 s after food delivery. Each horse performed 40 immediate-release (IR) trials, followed by forty 10-s release trials over a 3-day period. In addition, the same horses were tested 3 months later in the spring with the same number and sequence of trials. Results were analysed by log-linear analysis of frequencies. Results showed that while horses were able to achieve the correct feed goal choice in the immediate-release trials, they were unsuccessful with the 10-s release trials. This suggests that there are limitations in recall abilities in horses, in that they may not possess a prospective type of memory. There are welfare and training implications in these findings concerning the effects of overestimating the mental abilities of horses during training and the effects of delays in reinforcements. |
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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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Admin @ knut @ |
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4619 |
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McGreevy, P.D. |
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Book Whole |
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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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Equine Behaviour @ team @ |
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4530 |
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McGreevy, P. |
| Title |
Equine behavior |
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Journal Article |
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2004 |
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Journal of Equine Veterinary Science |
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24 |
Issue |
9 |
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397-398 |
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