Records |
Author |
Hill, S.E.; Ryan, M.J. |
Title |
The role of model female quality in the mate choice copying behaviour of sailfin mollies |
Type |
Journal Article |
Year |
2006 |
Publication |
Biology letters |
Abbreviated Journal |
Biol Lett |
Volume |
2 |
Issue |
2 |
Pages |
203-205 |
Keywords |
Animals; *Choice Behavior; Female; Male; *Mating Preference, Animal; Poecilia/*physiology |
Abstract |
Female mate choice copying is a socially mediated mate choice behaviour, in which a male's attractiveness to females increases if he was previously chosen by another female as a mate. Although copying has been demonstrated in numerous species, little is known about the specific benefits it confers to copying females. Here we demonstrate that the mate choice behaviour of female sailfin mollies (Poecilia latipinna) is influenced by the phenotypic quality of model females with whom males are observed consorting. Test females choosing between two males of similar body length were found to significantly increase time spent with previously non-preferred males after having observed them with a relatively high-quality female. Conversely, females were found to significantly decrease time spent with previously preferred males after having observed them with a relatively low-quality female. Female mate choice copying might be maintained by selection based on the heuristic value it provides females choosing between males whose quality differences are not easily distinguishable. |
Address |
University of Texas at Austin, Department of Psychology, 1 University Station A8000, Austin, TX 78712, USA. sehill@mail.utexas.edu |
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1744-9561 |
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PMID:17148362 |
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no |
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Serial |
1820 |
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Author |
Krcmar, S.; Mikuska, A.; Merdic, E. |
Title |
Response of Tabanidae (Diptera) to different natural attractants |
Type |
Journal Article |
Year |
2006 |
Publication |
Journal of Vector Ecology : Journal of the Society for Vector Ecology |
Abbreviated Journal |
J Vector Ecol |
Volume |
31 |
Issue |
2 |
Pages |
262-265 |
Keywords |
Animals; Appetitive Behavior/*physiology; Cattle/urine; Diptera/*physiology; Female; Horses/urine; Insect Control/methods; Sheep/urine; Swine/urine; Urine/*physiology |
Abstract |
The response of female tabanids to natural attractants was studied in the Monjoros Forest along the Nature Park Kopacki rit in eastern Croatia. Tabanids were caught in canopy traps baited with either aged cow, horse, sheep, or pig urine and also in unbaited traps. Tabanids were collected in a significantly higher numbers in traps baited with natural attractants compared to unbaited traps. The number of females of Tabanus bromius, Tabanus maculicornis, Tabanus tergestinus, and Hybomitra bimaculata collected from canopy traps baited with cow urine and traps baited with other natural attractants differed significantly. Females of Haematopota pluvialis were also collected more frequently in canopy traps baited with aged cow urine than in those with aged horse urine, but this difference was not significant. However, the number of females of Haematopota pluvialis collected from canopy traps baited with other natural attractants (sheep and pig urine) differed significantly when compared with aged cow urine baited traps. Canopy traps baited with aged cow urine collected significantly more Tabanus sudeticus than did traps baited with aged pig urine. Finally, the aged cow urine baited canopy traps collected 51 times more tabanids than unbaited traps, while aged horse, aged sheep, and aged pig urine baited traps collected 36, 30, and 22 times as many tabanids, respectively, than unbaited traps. |
Address |
Department of Biology, JJ Strossmayer University, Lj. Gaja 6, HR-31000 Osijek, Croatia |
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1081-1710 |
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PMID:17249343 |
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no |
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Serial |
1836 |
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Author |
Peltzer, K.; Mabilu, M.G.; Mathoho, S.F.; Nekhwevha, A.P.; Sikhwivhilu, T.; Sinthumule, T.S. |
Title |
Trauma history and severity of gambling involvement among horse-race gamblers in a South African gambling setting |
Type |
Journal Article |
Year |
2006 |
Publication |
Psychological Reports |
Abbreviated Journal |
Psychol Rep |
Volume |
99 |
Issue |
2 |
Pages |
472-476 |
Keywords |
Adult; African Continental Ancestry Group/*psychology/statistics & numerical data; Aged; Aged, 80 and over; Cross-Sectional Studies; Female; Gambling/*psychology; Humans; *Life Change Events; Male; Middle Aged; Personality Inventory; Risk Factors; *Social Environment; Socioeconomic Factors; South Africa; Statistics; Stress Disorders, Post-Traumatic/epidemiology/*psychology |
Abstract |
The purpose of this study was to ascertain the frequency of gambling involvement and the prevalence of problem gambling among horse race gamblers and to discover whether problem gambling in this sample is associated with a history of trauma. Among a sample of 266 South African horse-race gamblers (94% men and 6% women, Mage 46.8 yr., SD = 13.9, range 18-85 years), 31.2% were classified as probable pathological gamblers and 19.9% with problem gambling. Major weekly gambling activities included racetrack betting (82%), purchase of lottery tickets or scratch tickets (35%), purchase of sports lottery tickets (23%), and using casino type games (18%). Trauma history was significantly associated with gambling severity. |
Address |
Human Sciences Research Council, University of Limpopo, Pretoria, South Africa. KPeltzer@hsrc.ac.za |
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ISSN |
0033-2941 |
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PMID:17153816 |
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no |
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Serial |
1850 |
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Author |
Lee, J.; Paik, M. |
Title |
Sex preferences and fertility in South Korea during the year of the Horse |
Type |
Journal Article |
Year |
2006 |
Publication |
Demography |
Abbreviated Journal |
Demography |
Volume |
43 |
Issue |
2 |
Pages |
269-292 |
Keywords |
Asian Continental Ancestry Group/*psychology; *Astrology; Attitude/*ethnology; Chronology; *Culture; Female; *Fertility; Humans; Korea; Male; *Mythology; Risk; *Sex Ratio; Social Desirability; Time |
Abstract |
Since antiquity, people in several East Asian countries, such as China, Japan, and South Korea, have believed that a person is destined to possess specific characteristics according to the sign of the zodiac under which he or she was born. South Koreans, in particular, have traditionally considered that the year of the Horse bears inauspicious implications for the birth of daughters. Using monthly longitudinal data at the region level in South Korea between 1970 and 2003, we found that in the year of the Horse, the sex ratio at birth significantly increased while fertility decreased. |
Address |
Department of Economics, Sam M. Walton College of Business, Business Building 402, University of Arkansas, Fayetteville, AR 72701-1201, USA. jlee@walton.uark.edu |
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ISSN |
0070-3370 |
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PMID:16889129 |
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no |
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Serial |
1867 |
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Author |
Christie, J.L.; Hewson, C.J.; Riley, C.B.; McNiven, M.A.; Dohoo, I.R.; Bate, L.A. |
Title |
Management factors affecting stereotypies and body condition score in nonracing horses in Prince Edward Island |
Type |
Journal Article |
Year |
2006 |
Publication |
The Canadian Veterinary Journal. La Revue Veterinaire Canadienne |
Abbreviated Journal |
Can Vet J |
Volume |
47 |
Issue |
2 |
Pages |
136-143 |
Keywords |
*Animal Husbandry/standards/statistics & numerical data; *Animal Welfare; Animals; Behavior, Animal/*physiology; Body Constitution/*physiology; Female; Horses/*physiology; Male; Prince Edward Island; Questionnaires; Risk Factors; Sex Factors |
Abstract |
In North America, there are few representative data about the effects of management practices on equine welfare. In a randomized survey of 312 nonracing horses in Prince Edward Island (response rate 68.4%), owners completed a pretested questionnaire and a veterinarian examined each horse. Regression analyses identified factors affecting 2 welfare markers: body condition score (BCS) and stereotypic behavior. Horses' BCSs were high (mean 5.7, on a 9-point scale) and were associated with sex (males had lower BCSs than females; P < 0.001) and examination date (P = 0.052). Prevalences of crib biting, wind sucking, and weaving were 3.8%, 3.8%, and 4.8%, respectively. Age (OR = 1.07, P = 0.08) and hours worked weekly (OR = 1.12, P = 0.03) were risk factors for weaving. Straw bedding (OR = 0.3, P = 0.03), daily hours at pasture (OR = 0.94, P = 0.02), and horse type (drafts and miniatures had a lower risk than light horses; P = 0.12) reduced the risk of horses showing oral stereotypies. Some of these results contradict those of other studies perhaps because of populations concerned. |
Address |
Sir James Dunn Animal Welfare Centre, Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island |
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0008-5286 |
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PMID:16579039 |
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no |
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Serial |
1875 |
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Author |
Lin, Y.-L.; Moolenaar, H.; van Weeren, P.R.; van de Lest, C.H.A. |
Title |
Effect of microcurrent electrical tissue stimulation on equine tenocytes in culture |
Type |
Journal Article |
Year |
2006 |
Publication |
American Journal of Veterinary Research |
Abbreviated Journal |
Am J Vet Res |
Volume |
67 |
Issue |
2 |
Pages |
271-276 |
Keywords |
Animals; Apoptosis; Cell Proliferation; Cells, Cultured; Electric Stimulation; *Horses; Tendons/*cytology |
Abstract |
OBJECTIVE: To determine effects of microcurrent electrical tissue stimulation (METS) on equine tenocytes cultured from the superficial digital flexor tendon (SDFT). SAMPLE POPULATION: SDFTs were collected from 20 horses at slaughter. PROCEDURE: Tenocytes were isolated following outgrowth from explants and grown in 48-well plates. Four methods of delivering current to the tenocytes with a METS device were tested. Once the optimal method was selected, current consisting of 0 (negative control), 0.05, 0.1, 0.5, 1.0, or 1.5 mA was applied to cells (8 wells/current intensity) once daily for 8 minutes. Cells were treated for 1, 2, or 3 days. Cell proliferation, DNA content, protein content, and apoptosis rate were determined. RESULTS: Application of microcurrent of moderate intensity increased cell proliferation and DNA content, with greater increases with multiple versus single application. Application of microcurrent of moderate intensity once or twice increased protein content, but application 3 times decreased protein content. Application of current a single time did not significantly alter apoptosis rate; however, application twice or 3 times resulted in significant increases in apoptosis rate, and there were significant linear (second order) correlations between current intensity and apoptosis rate when current was applied twice or 3 times. CONCLUSIONS AND CLINICAL RELEVANCE: Results of the present study indicate that microcurrent affects the behavior of equine tenocytes in culture, but that effects may be negative or positive depending on current intensity and number of applications. Therefore, results are far from conclusive with respect to the suitability of using METS to promote tendon healing in horses. |
Address |
Department of Equine Sciences, Faculty of Veterinary Medicine, State University of Utrecht, Utrecht, The Netherlands |
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0002-9645 |
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PMID:16454632 |
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no |
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Serial |
1878 |
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Author |
Shoshani, J.; Kupsky, W.J.; Marchant, G.H. |
Title |
Elephant brain. Part I: gross morphology, functions, comparative anatomy, and evolution |
Type |
Journal Article |
Year |
2006 |
Publication |
Brain Research Bulletin |
Abbreviated Journal |
Brain Res Bull |
Volume |
70 |
Issue |
2 |
Pages |
124-157 |
Keywords |
Animals; Brain/*anatomy & histology/blood supply/*physiology; Cats; Chinchilla; Elephants/*anatomy & histology/*physiology; Equidae; *Evolution; Female; Guinea Pigs; Haplorhini; Humans; Hyraxes; Male; Pan troglodytes; Sheep; Wolves |
Abstract |
We report morphological data on brains of four African, Loxodonta africana, and three Asian elephants, Elephas maximus, and compare findings to literature. Brains exhibit a gyral pattern more complex and with more numerous gyri than in primates, humans included, and in carnivores, but less complex than in cetaceans. Cerebral frontal, parietal, temporal, limbic, and insular lobes are well developed, whereas the occipital lobe is relatively small. The insula is not as opercularized as in man. The temporal lobe is disproportionately large and expands laterally. Humans and elephants have three parallel temporal gyri: superior, middle, and inferior. Hippocampal sizes in elephants and humans are comparable, but proportionally smaller in elephant. A possible carotid rete was observed at the base of the brain. Brain size appears to be related to body size, ecology, sociality, and longevity. Elephant adult brain averages 4783 g, the largest among living and extinct terrestrial mammals; elephant neonate brain averages 50% of its adult brain weight (25% in humans). Cerebellar weight averages 18.6% of brain (1.8 times larger than in humans). During evolution, encephalization quotient has increased by 10-fold (0.2 for extinct Moeritherium, approximately 2.0 for extant elephants). We present 20 figures of the elephant brain, 16 of which contain new material. Similarities between human and elephant brains could be due to convergent evolution; both display mosaic characters and are highly derived mammals. Humans and elephants use and make tools and show a range of complex learning skills and behaviors. In elephants, the large amount of cerebral cortex, especially in the temporal lobe, and the well-developed olfactory system, structures associated with complex learning and behavioral functions in humans, may provide the substrate for such complex skills and behavior. |
Address |
Department of Biology, University of Asmara, P.O. Box 1220, Asmara, Eritrea (Horn of Africa). hezy@bio.uoa.edu.er |
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0361-9230 |
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PMID:16782503 |
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no |
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Equine Behaviour @ team @ |
Serial |
2623 |
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Author |
Church, D.L.; Plowright, C.M.S. |
Title |
Spatial encoding by bumblebees (Bombus impatiens) of a reward within an artificial flower array |
Type |
Journal Article |
Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
9 |
Issue |
2 |
Pages |
131-140 |
Keywords |
Animals; Appetitive Behavior/physiology; Association Learning/*physiology; Bees/*physiology; Chi-Square Distribution; *Cues; Female; Memory/physiology; Reward; Space Perception/*physiology; Spatial Behavior/*physiology |
Abstract |
We presented bumblebees a spatial memory task similar to that used with other species (e.g., cats, dogs, and pigeons). In some conditions we allowed for presence of scent marks in addition to placing local and global spatial cues in conflict. Bumblebees (Bombus impatiens) were presented an array of artificial flowers within a flight cage, one flower offering reward (S+), while the others were empty (S-). Bees were tested with empty flowers. In Experiment 1, flowers were either moved at the time of testing or not. Bees returned to the flower in the same absolute position of the S+ (the flower-array-independent (FAI) position), even if it was in the wrong position relative to the S- and even when new flower covers prevented the use of possible scent marks. New flower covers (i.e., without possible scent marks) had the effect of lowering the frequency of probing behavior. In Experiment 2, the colony was moved between training and testing. Again, bees chose the flower in the FAI position of the S+, and not the flower that would be chosen using strictly memory for a flight vector. Together, these experiments show that to locate the S+ bees did not rely on scent marks nor the positions of the S-, though the S- were prominent objects close to the goal. Also, bees selected environmental features to remember the position of the S+ instead of relying upon a purely egocentric point of view. Similarities with honeybees and vertebrates are discussed, as well as possible encoding mechanisms. |
Address |
Psychology Department, Bag Service #45444, University of New Brunswick, Fredericton, NB, E3B 6E4, Canada. dchurchl@unb.ca |
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1435-9448 |
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PMID:16416106 |
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no |
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Equine Behaviour @ team @ |
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2474 |
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Author |
Cheng, K.; Wignall, A.E. |
Title |
Honeybees (Apis mellifera) holding on to memories: response competition causes retroactive interference effects |
Type |
Journal Article |
Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
9 |
Issue |
2 |
Pages |
141-150 |
Keywords |
Animals; Bees/*physiology; Choice Behavior/physiology; *Cues; Memory/*physiology; Perceptual Masking/physiology; Space Perception/*physiology; Spatial Behavior/*physiology |
Abstract |
Five experiments on honeybees examined how the learning of a second task interferes with what was previously learned. Free flying bees were tested for landmark-based memory in variations on a paradigm of retroactive interference. Bees first learned Task 1, were tested on Task 1 (Test 1), then learned Task 2, and were tested again on Task 1 (Test 2). A 60-min delay (waiting in a box) before Test 2 caused no performance decrements. If the two tasks had conflicting response requirements, (e.g., target right of a green landmark in Task 1 and left of a blue landmark in Task 2), then a strong decrement on Test 2 was found (retroactive interference effect). When response competition was minimised during training or testing, however, the decrement on Test 2 was small or nonexistent. The results implicate response competition as a major contributor to the retroactive interference effect. The honeybee seems to hold on to memories; new memories do not wipe out old ones. |
Address |
Centre for the Integrative Study of Animal Behaviour and Department of Psychology, Macquarie University, Sydney, NSW 2109, Australia. ken@galliform.bhs.mq.edu.au |
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1435-9448 |
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PMID:16374626 |
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no |
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Equine Behaviour @ team @ |
Serial |
2477 |
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Author |
Santos, L.R.; Pearson, H.M.; Spaepen, G.M.; Tsao, F.; Hauser, M.D. |
Title |
Probing the limits of tool competence: experiments with two non-tool-using species (Cercopithecus aethiops and Saguinus oedipus) |
Type |
Journal Article |
Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
9 |
Issue |
2 |
Pages |
94-109 |
Keywords |
Animals; *Association Learning; Cercopithecus aethiops; *Cognition; Female; *Intelligence; Male; *Motor Skills; *Problem Solving; Saguinus; Species Specificity |
Abstract |
Non-human animals vary in their ability to make and use tools. The goal of the present study was to further explore what, if anything, differs between tool-users and non-tool-users, and whether these differences lie in the conceptual or motor domain. We tested two species that typically do not use tools-cotton top tamarins (Saguinus oedipus) and vervet monkeys (Cercopithecus aethiops)-on problems that mirrored those designed for prolific tool users such as chimpanzees. We trained subjects on a task in which they could choose one of two canes to obtain an out-of-reach food reward. After training, subjects received several variations on the original task, each designed to examine a specific conceptual aspect of the pulling problem previously studied in other tool-using species. Both species recognized that effective pulling tools must be made of rigid materials. Subsequent conditions revealed significant species differences, with vervets outperforming tamarins across many conditions. Vervets, but not tamarins, had some recognition of the relationship between a tool's orientation and the position of the food reward, the relationship between a tool's trajectory and the substance that it moves on, and that tools must be connected in order to work properly. These results provide further evidence that tool-use may derive from domain-general, rather than domain-specific cognitive capacities that evolved for tool use per se. |
Address |
Department of Psychology, Yale University, Box 208205, New Haven, CT, USA. laurie.santos@yale.edu |
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1435-9448 |
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PMID:16341524 |
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no |
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Equine Behaviour @ team @ |
Serial |
2478 |
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