Simulations of the social organization of large schools of fish whose perception is obstructed
Contributor(s):: Kunz, Hanspeter, Hemelrijk, Charlotte K.
Individual-based models have shown that simple interactions among moving individuals (repulsion, attraction and alignment) result in travelling schools that resemble those of real fish. In most models individuals interact with all neighbours within sensory range which usually includes almost all...
Evaluation of the sexual behavior and testosterone concentrations of Mangalarga Marchador stallions
Contributor(s):: Rua, M. A. S., Quirino, C. R., Bastos, R., Bartholazzi Junior, A., Santoro, P. N., Ribeiro, M. da S., Matos, L. F., Barreto, M. A. P.
Assessing the sexual behavior of stallions is extremely important because sexual behavior is linked to reproductive efficiency. The objective of this study was to evaluate the sexual behavior, testosterone concentration and libido of Mangalarga Marchador stallions from northern Rio de Janeiro...
The Trap-Neuter-Return Program as a Means for Collecting, Analyzing, and Comparing Data in Animal Care Facilities in Florida, Louisiana, and Mississippi
Contributor(s):: Stephanie T. Doty
The TNR program has been met with both scrutiny and approval as a result of conflicting data from studies that examine its usefulness as a means of controlling the free-roaming cat population explosion (Levy & Crawford, 2004). Though the differing opinions will be discussed, it is not the...
Early transfer of mated females into the maternity unit reduces stress and increases maternal care in farm mink
Contributor(s):: Malmkvist, J., Palme, R.
Mated mammals on farms are typically transferred to another housing environment prior to delivery. We investigated whether the timing of this transfer - EARLY (Day -36), INTERMEDIATE (Day -18), or LATE (Day -3) relative to the expected day of birth (Day 0) - affects maternal stress, maternal care...
Die Tiersammlung Maud Pohlmeyer
Contributor(s):: Pohlmeyer, Markus
Is consensus-seeking unique to humans? A selective review of animal group decision-making and its implications for (human) social psychology
Contributor(s):: Kameda, Tatsuya, Wisdom, Thomas, Toyokawa, Wataru, Inukai, Keigo
Severe intragroup aggressions in captive common marmosets ( Callithrix jacchus )
Contributor(s):: Filippis, B. de, Chiarotti, F., Vitale, A.
Members of captive colonies of common marmosets (Callithrix jacchus), a small New World primate, can occasionally be victims of repeated, and potentially fatal, attacks by a family-mate. This study examined the records of a colony, looking for past instances of such aggressions. The aim was to...
Training large macaws for artificial insemination procedures
Contributor(s):: Leblanc, F., Pothet, G., Jalme, M. S., Dorval, M., Bovet, D.
For some endangered parrot species, captive breeding may be the only insurance for their survival. However, many individuals in captivity do not reproduce. Artificial insemination (AI) may help overcome reproductive failures or geographic distance. For semen collection in birds, massage is the...
Social relations in a mixed group of mules, ponies and donkeys reflect differences in equid type
Contributor(s):: Proops, Leanne, Burden, Faith, Osthaus, Britta
Human-animal relationships at sheep and cattle abattoirs
Contributor(s):: Coleman, G. J., Rice, M., Hemsworth, P. H.
The historic importance of the dingo in aboriginal society in Victoria (Australia): a reconsideration of the archival record
Contributor(s):: Cahir, F., Clark, I.
Collective animal behavior
Contributor(s):: Sumpter, David J. T.
Regular rates of popular culture change reflect random copying
Contributor(s):: Bentley, R. Alexander, Lipo, Carl P., Herzog, Harold A., Hahn, Matthew W.
Aggression and social spacing in light horse ( Equus caballus ) mares and foals
Contributor(s):: Weeks, J. W., Crowell-Davis, S. L., Caudle, A. B., Heusner, G. L.
Aggression and social spacing were studied in 14 light horse mares and their foals living at pasture. Focal samples were collected on each mare-foal dyad for 6 to 10.5 h from 2 months of foal age until weaning at approximately 4 months of age. Observations on foals continued until approximately 6...
How important is social facilitation for dustbathing in laying hens?
Contributor(s):: Olsson, I. A. S., Duncan, I. J. H., Keeling, L. J., Widowski, T. M.
Hens in a group usually synchronize dust bathing, such that when one hen starts to dust bathe she will often be joined by others. The sight of another hen dust bathing could thus possibly act as a stimulus increasing motivation for dust bathing, with important implications for hens in furnished...
Implications of coping characteristics and social status for welfare and production of paired growing gilts
Contributor(s):: Ruis, M. A. W., Brake, J. H. A. te, Engel, B., Buist, W. G., Blokhuis, H. J., Koolhaas, J. M.
This paper considers the question whether knowledge on individual coping characteristics of growing pigs may be used to improve welfare and production after mixing. Gilts with either reactive or proactive coping characteristics were identified according to behavioural resistance in a backtest,...
Social discrimination in lambs: persistence and scope
Contributor(s):: Ligout, S., Porter, R. H., Bon, R.
Social recognition among familiar unrelated lambs was assessed in a series of tests. Lambs (12 pairs of twins) and their mothers were housed together in small groups for 1 week (Original groups; O) then reorganized into new groupings (Recent-groups; R) for the remainder of the experiment. During...
Effects of regrouping on the individual behavioural characteristics of pigs
Contributor(s):: Hayne, S. M., Gonyou, H. W.
The behaviour of an animal is a combination of that which is inherited and that which is influenced by the environment. This study was conducted to determine a means for assessing and distinguishing individuals based on behavioural characteristics and to better understand the environmental impact...
Effects of social facilitation for locating feeding sites by cattle in an eight-arm radial maze
Contributor(s):: Bailey, D. W., Howery, L. D., Boss, D. L.
A study was conducted in an eight-arm radial maze to determine if cattle with various foraging experiences could facilitate location of feeding sites by other cattle. Heifers assigned as "followers" (n=24) were initially trained to expect straw at the end of each arm. Initial training of heifers...
Grouping and social preferences in calves, heifers and cows. (Special Issue: Behaviour and welfare of cattle)
Contributor(s):: Boe, K. E., Faerevik, G.
In order to improve animal welfare, a growing number of calves, heifers and dairy cows are reared in loose housing systems. However, (re)grouping unfamiliar animals may result in aggressive interactions and distress, especially for low ranked animals. Grouping of unfamiliar animals is found to...