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Author  |
Maddock, L. |
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Title |
The “migration” and grazing succession |
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Year |
1995 |
Publication |
Serengeti: Dynamics of an Ecosystem |
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Editorial Reviews
Book Description
Originally published in 1979, Serengeti: Dynamics of an Ecosystem was immediately recognized as the first synthesis of the patterns and processes of a major ecosystem. A prototype for initial studies, Serengeti contains baseline data for further and comparative studies of ecosystems. The new Serengeti II builds on the information presented originally in Serengeti; both books together offer essential information and insights for ecology and conservation biology. |
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University Of Chicago Press |
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Chicago |
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Sinclair, A.R.E. ; Norton-Griffiths, A.R.E. |
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Serengeti: Dynamics of an Ecosystem |
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978-0226760292 |
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Equine Behaviour @ team @ |
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2343 |
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Author |
Loveland, K.A. |
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Title |
Self-recognition in the bottlenose dolphin: ecological considerations |
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Journal Article |
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Year |
1995 |
Publication |
Consciousness and Cognition |
Abbreviated Journal |
Conscious Cogn |
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Volume |
4 |
Issue |
2 |
Pages |
254-257 |
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Animals; Attention; *Awareness; Body Image; Dolphins/*psychology; Exploratory Behavior; Female; Male; *Self Concept; *Social Environment; Species Specificity; Television; *Visual Perception |
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Department of Psychiatry and Behavioral Sciences, University of Texas Medical School, Houston 77025, USA |
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English |
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1053-8100 |
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PMID:8521267 |
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Equine Behaviour @ team @ |
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4161 |
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Author |
Limongelli L; Boysen ST; Visalberghi E |
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Title |
Comprehension of cause-effect relations in a tool-using task by chimpanzees (Pan troglodytes) |
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Journal Article |
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Year |
1995 |
Publication |
J. Comp. Psychol. |
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109 |
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18 |
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Equine Behaviour @ team @ |
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3015 |
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Author |
Lefebvre, L. |
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Title |
Ecological correlates of social learning: problems and solutions for the comparative method |
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Journal Article |
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Year |
1995 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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35 |
Issue |
1-3 |
Pages |
163-171 |
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Adaptive specialization; Social learning; Comparative method |
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Interspecific variation in learning and cognition is often accounted for by adaptive specialization, an ecological framework where variation between species in the environmental problems they face is thought to select for quantitatively and/or qualitatively different abilities. Adaptive specialization theory relies on the comparative method for testing its hypotheses and assumes a naturally selected basis for the predicted differences. This review examines social learning as a specialization to group-living and scramble feeding competition. It points out one important problem with current studies in the area, the lack of quantitative controls for confounding variables that may cause type 1 or 2 error in comparative tests. A linear regression technique is proposed to measure and remove interspecific differences on control tests for which there is no predicted adaptive specialization; as in other areas of comparative biology, the adaptive prediction is then made on the residual deviation from the regression of these confounding variables. Examples are given from research on opportunistic Columbids, the group-living feral pigeon Columbia livia, and the territorial Zenaida dove, Zenaida aurita. |
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refbase @ user @ |
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843 |
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Author |
Laughlin N.K.; Lasky R.E.; Luck M.L.; Kluender K.R.; Hecox K.E. |
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Title |
Early lead exposure alters behavioral and electrophysiological indices of auditory processing in the rhesus monkey |
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1995 |
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Neurotoxicology and Teratology |
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17 |
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374-374 |
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3456 |
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Krebs, J.R.; Clayton, N.S.; Hampton, R.R.; Shettleworth, S.J. |
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Title |
Effects of photoperiod on food-storing and the hippocampus in birds |
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Journal Article |
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Year |
1995 |
Publication |
Neuroreport |
Abbreviated Journal |
Neuroreport |
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Volume |
6 |
Issue |
12 |
Pages |
1701-1704 |
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Keywords |
Animals; Birds; Eating/*physiology; Female; Hippocampus/*physiology; Light; Male; *Photoperiod; Seasons; Telencephalon/physiology; Time Factors |
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Birds that store food have a relatively large hippocampus compared to non-storing species. The hippocampus shows seasonal differences in neurogenesis and volume in black-capped chikadees (Parus atricapillus) taken from the wild at different times of year. We compared hippocampal volumes in black-capped chickadees captured at the same time but differing in food-storing behaviour because of manipulations of photoperiod in the laboratory. Differences in food-storing behaviour were not accompanied by differences in the volume of the hippocampus. Hippocampal volumes also did not differ between two groups of a non-food-storing control species, house sparrows (Passer domesticus), exposed to the same conditions as the chickadees. |
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Edward Grey Institute of Field Ornithology, Department of Zoology, Oxford, UK |
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0959-4965 |
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PMID:8527745 |
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refbase @ user @ |
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378 |
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Author |
Koenen, E.P.C.; van Veldhuizen, A.E.; Brascamp, E.W. |
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Genetic parameters of linear scored conformation traits and their relation to dressage and show-jumping performance in the Dutch Warmblood Riding Horse population |
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Journal Article |
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1995 |
Publication |
Livestock Production Science |
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43 |
Issue |
1 |
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85-94 |
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Horse; Heritability; Conformation; Dressage; Show jumping |
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In this study genetic parameters of linear scored conformation traits of the Dutch Warmblood Riding Horse were estimated in relation to performance in competition. Observations on 10 665 mares were analyzed with an animal model including the fixed effects age, classifier, location and percentage of thoroughbred. Using restricted maximum likelihood algorithms, heritabilities of 26 linear scored conformation traits were estimated in the range 0.09-0.28. Several conformation traits had high up to very high mutual genetic correlations. Competition results of 3476 horses with performance in dressage and 3220 horses with performance in show-jumping were linked to the conformation data to estimate the genetic relationship between conformation and performance in competition. The model for the evaluation of the competition results included the fixed effects riding club, age and sex. Estimated heritabilities for dressage and show-jumping were 0.17 +/- 0.05 and 0.19 +/- 0.04, respectively. Genetic correlations between conformation and performance were low to moderate. The length of the neck, length and position of the shoulders, shape and length of croup and muscularity of the haunches had a significant moderate genetic correlation with dressage. Muscularity of the neck, shape of the croup and muscularity of the haunches had a significant genetic correlation with show-jumping. The results indicate that, due to the low genetic correlations with performance traits, indirect selection for performance using conformation results is of limited value. |
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refbase @ user @ |
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3961 |
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Author |
Kiltie, R.A.; Fan, J.; Laine, A.F. |
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Title |
A wavelet-based metric for visual texture discrimination with applications in evolutionary ecology |
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Journal Article |
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1995 |
Publication |
Mathematical Biosciences |
Abbreviated Journal |
Math Biosci |
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126 |
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1 |
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21-39 |
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Animals; Carnivora; *Ecology; Equidae; *Evolution; Humans; Mathematics; Models, Biological; Moths; *Pattern Recognition, Visual; Pigmentation |
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Much work on natural and sexual selection is concerned with the conspicuousness of visual patterns (textures) on animal and plant surfaces. Previous attempts by evolutionary biologists to quantify apparency of such textures have involved subjective estimates of conspicuousness or statistical analyses based on transect samples. We present a method based on wavelet analysis that avoids subjectivity and that uses more of the information in image textures than transects do. Like the human visual system for texture discrimination, and probably like that of other vertebrates, this method is based on localized analysis of orientation and frequency components of the patterns composing visual textures. As examples of the metric's utility, we present analyses of crypsis for tigers, zebras, and peppered moth morphs. |
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Department of Zoology, University of Florida, Gainesville |
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0025-5564 |
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PMID:7696817 |
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Equine Behaviour @ team @ |
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2660 |
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Author |
Keverne, E.B. |
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Title |
Olfactory learning |
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Journal Article |
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1995 |
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Current Opinion in Neurobiology |
Abbreviated Journal |
Curr. Opin. Neurobiol. |
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5 |
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4 |
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482-488 |
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olfactory perception mammals |
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Unravelling the mechanisms of learning and memory can, and should, be tackled at many levels. Discovery of the huge family of odourant receptor genes provided olfaction with `molecular' respectability similar to that afforded to the visual system. Consequently, molecular studies have dominated the olfactory literature this past year, even to the point of providing a molecular basis of olfactory perception. Needless to say, the molecular approach favours a `hard-wired' system; however, other results suggest that flexibility in the olfactory system provides for certain adaptations that are crucial to the biological needs of mammals. |
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798 |
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Kasuya,Eiiti |
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A randomization test for linearity of dominance hierarchies |
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1995 |
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Journal of Ethology |
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J. Ethol. |
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13 |
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1 |
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137-140 |
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Equine Behaviour @ team @ |
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4288 |
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