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Articles 811 - 840 of 843
Full-Text Articles in Entire DC Network
Aquatic Feeding By Moose: Seasonal Variation In Relation To Plant Chemical Composition And Use Of Mineral Licks, D. Fraser, B. K. Thompson, D. Arthur
Aquatic Feeding By Moose: Seasonal Variation In Relation To Plant Chemical Composition And Use Of Mineral Licks, D. Fraser, B. K. Thompson, D. Arthur
Feeding Behavior Collection
Activity of moose (Alces alces) was studied at aquatic feeding areas and at natural, sodium-rich licks during four periods covering late May to early September. Aquatic feeding increased from period 1 (late May and early June) to period 2 (late June and early July) and had declined by late July. Major activity at mineral licks occurred earlier in the season than aquatic feeding, especially for males. Chemical composition of aquatic plants showed no seasonal changes corresponding to the peak of aquatic feeding in period 2, although the sodium content of some species declined in period 3. We suggest that moose …
Predation By Wild Coyotes: Behavioral And Ecological Analyses, Michael C. Wells, Marc Bekoff
Predation By Wild Coyotes: Behavioral And Ecological Analyses, Michael C. Wells, Marc Bekoff
Ethology Collection
Predatory behavior of coyotes (Canis latrans) was studied between 1977 and 1980 in the Grand Teton National Park, Jackson, Wyoming. Major prey were voles (Microtus spp.), Uinta ground squirrels (Spermophilus armatus), pocket gophers (Thomomys talpoides), and grasshoppers (Locustidae). Coyotes typically rushed and ran down squirrels; when hunting mice, coyotes pounced and stabbed at them with their forepaws. Sequence structure was similar, though sequences directed to squirrels were significantly more variable. When juvenile coyotes hunted mice, sequences were similar to those performed by adults that hunted mice. Adults and juveniles were about equally successful. The size of prey last eaten influenced …
The Problem Of Pain: What Do Animals Really Feel?, Dana H. Murphy
The Problem Of Pain: What Do Animals Really Feel?, Dana H. Murphy
Sentience Collection
Much of the contention and confusion that seem inevitably to arise whenever the subject of pain in animals comes up appear to stem principally from problems with the word "pain" itself. When used to describe responses in humans, "pain" can mean any subset of an incredibly broad spectrum of sensations and emotions, ranging from the instantaneous, galvanizing effect of a dentist drill hitting the nerve in a molar, to more airy notions such as the "pain" of rejection or "painfully" embarrassing situations. Humans even use concepts as abstruse as the German term, weltschmerz, or "world pain," which denotes a vaguely …
Behavioral Ecology Of Coyotes: Social Organization, Rearing Patterns, Space Use, And Resource Defense, Marc Bekoff, Michael C. Wells
Behavioral Ecology Of Coyotes: Social Organization, Rearing Patterns, Space Use, And Resource Defense, Marc Bekoff, Michael C. Wells
Ethology Collection
Two groups of coyotes in which genealogical relationships were known were studied in the Grand Teton National Park, outside of Jackson, Wyoming, U.S.A., from 1977-1982. One group, a pack consisting of parents and some non-dispersing and non-breeding offspring, defended a territory and the food (mainly elk carrion) contained within it, especially during winter, and also had helpers at den sites (5 of 6 were males). The other group, a mated resident pair, all of whose young dispersed during the first year of life, did not defend a territory and never had helpers at dens. Delayed dispersal and retention of some …
Social, Spacing, And Cooperative Behavior Of The Collared Peccary, Tayassu Tajacu, John A. Byers, Marc Bekoff
Social, Spacing, And Cooperative Behavior Of The Collared Peccary, Tayassu Tajacu, John A. Byers, Marc Bekoff
Ethology Collection
Social behavior of the collared peccary was studied on the lower, eastern slopes of the Mazatzal Mountains, Arizona. The social unit in this species is a cohesive herd, in which small inter-individual distances are maintained. Two conspicuous acts, one olfactory and one auditory, functioned to maintain close spacing. Social interactions were brief but tended to synchronize the activities of animals and also to bring them closer together. Amicable and neutral actions occurred far more frequently than agonistic interactions. Most agonistic behavior did not involve physical contact. Cooperative nursing, predator defense, and feeding occurred; all adults were tolerant of young, and …
Activity Of Moose And White-Tailed Deer At Mineral Springs, D. Fraser, H. Hristienko
Activity Of Moose And White-Tailed Deer At Mineral Springs, D. Fraser, H. Hristienko
Social Behavior Collection
Activity of moose (Alces alces) and white-tailed deer (Odocoileus virginianus) was studied at two natural mineral springs (licks) in Ontario during the springtime and summer of 1977 to 1980. Most adult moose appeared to use a lick during a single 1- to 5-day period in a year; some returned at intervals during the season; and all seemed drawn principally by the mineral-rich water. Some young moose remained in the lick vicinity for 3 weeks or more, and often wandered in and out of the licks, grazing herbage as well as drinking. This suggested a social as well as a nutritional …
Behavioural Budgeting By Wild Coyotes: The Influence Of Food Resources And Social Organization, Marc Bekoff, Michael C. Wells
Behavioural Budgeting By Wild Coyotes: The Influence Of Food Resources And Social Organization, Marc Bekoff, Michael C. Wells
Ethology Collection
Daytime behavioural budgets of coyotes (Canis latrans) living in the Grand Teton National Park Jackson, Wyoming, were analysed in order to determine how activity patterns ' ere influenced by food resources and social organization. In winter coyotes rested more-and hunted less than in other seasons. Pack-living coyotes rested more and travelled less than resident pairs or solitary resident or transients during winter months when the major food resource was ungulate (predominantly elk, Cervus canadensis) carrion. A mated female living in a pack rested significantly more and travelled significantly less than a mated female living only with her mate (as a …
An Observational Study Of Coyote (Canis Latrans) Scent-Marking And Territoriality In Yellowstone National Park, Joseph J. Allen, Marc Bekoff, Robert L. Crabtree
An Observational Study Of Coyote (Canis Latrans) Scent-Marking And Territoriality In Yellowstone National Park, Joseph J. Allen, Marc Bekoff, Robert L. Crabtree
Ethology Collection
Free-ranging coyotes (Canis latrans) living in neighboring packs were observed in the Lamar Valley of Yellowstone National Park, Wyoming, from Jan. to May 1997. Through direct observation, we recorded the location of coyote scent marks and information regarding the identity of the marking animal. Patterns of scent-marking were then analyzed spatially and demographically. All of the evidence from the present study supports a strong relationship between scent-marking and territoriality in these coyotes, and all predictions were met. A preponderance of scent marks was found in the periphery of territories. Most of those marks were raised-leg urinations (RLUs) and forward-lean urinations …
An Observational Study Of Scent-Marking In Coyotes, Canis Latrans, Michael C. Wells, Marc Bekoff
An Observational Study Of Scent-Marking In Coyotes, Canis Latrans, Michael C. Wells, Marc Bekoff
Ethology Collection
Urination and defaecation patterns of free-ranging coyotes (Canis latrans) were studied in the Grand Teton National Park, Jackson, Wyoming, for two years. The vast majority of urinations by adult males and females were involved in 'marking,' and differentiating between 'marking' and 'elimination' may not be necessary. Our results may be summarized as follows: 1) Raised-leg urinations (RLU) performed by males were most frequently used in marking. (2) Females marked throughout the year using the squat (SQU) posture. (3) Snow tracking and reading snow sign resulted in a gross underestimate of the relative frequency of SQU's and a large overestimate in …
Equine Behavior Problems In Relation To Humane Management, Katherine A. Houpt
Equine Behavior Problems In Relation To Humane Management, Katherine A. Houpt
Equines Collection
The behavior problems of horses are frequently related to management practices. Behaviors that are termed stall vices appear to be either stereotyped behaviors that occur in reaction to stress, or patterns that emerge when natural behaviors such as grazing are prevented. The behavior cases presented to the New York State College of Veterinary Medicine, Cornell University, were tabulated: 27% were stall vices and 27% were some form of aggression. The stall vices were circling, digging, kicking the stall, chewing wood, swallowing air or self-mutilation. Management of horses on pasture rather than in stalls prevents the development of many of these …
The Metaphysics Of Anthropocentrism: A Review Of Paul Ehrenfeld's "The Arrogance Of Humanism" And Mary Midgley's "Beast And Man", Bernard E. Rollin
The Metaphysics Of Anthropocentrism: A Review Of Paul Ehrenfeld's "The Arrogance Of Humanism" And Mary Midgley's "Beast And Man", Bernard E. Rollin
Attitudes Towards Animals Collection
Our attitudes and behavior toward nature and toward other forms of life are clearly in the forefront of contemporary ethical concern. It thus becomes necessary to examine critically the metaphysics which has traditionally grounded these attitudes. Unquestionably, the key feature of the dominant underlying conceptual scheme has been the positing of a clear-cut dichotomy between man and the natural world. For most of the Greeks, man is radically separated from nature- he lives in the realm of nomos, convention, somehow above the realm of physis, nature. He can reason, communicate, choose, create a social order, apprehend ultimate reality, and even …
Where To Put Your Choker, Roger A. Mugford
Where To Put Your Choker, Roger A. Mugford
Pets Collection
The choke chain has come to be regarded as an indispensable aid to training dogs, but even the most time-hallowed practices deserve an occasional critical review. The author has recently completed an investigation into the uses and abuses of choke chains, and failed to find any benefit from using a choker rather than a conventional leather collar. Indeed, there are some very considerable dangers and disadvantages associated with the device. These charges may sound like heresy to many dog-trainers, but to others, it may strike a sympathetic chord.
The Buller-Steer Syndrome, Richard Ulbrich
The Buller-Steer Syndrome, Richard Ulbrich
Ethology Collection
Bulling among steers is an abnormal behavioral trait and is a common health and economic problem in feedlot operations. Factors associated with the buller-steer syndrome are hormonal implantation, seasonality and environmental conditions, stress, overcrowding, and social interaction between individuals. Research has examined relationships between these and other factors and buller occurrence. Boredom of feedlot cattle may contribute to buller occurrence and other undesirable behavior more than we might suspect. Research is needed to determine the feasibility of enriching the environment of penned livestock in general, the goal of which would be, in theory, the elimination of undesirable behavior as well …
Social And Cognitive Capabilities Of Nonhuman Primates: Lessons From The Wild To Captivity, William C. Mcgrew
Social And Cognitive Capabilities Of Nonhuman Primates: Lessons From The Wild To Captivity, William C. Mcgrew
Sentience Collection
All anthropoid primates in nature lead highly sociable lives. In infancy and childhood this is characterized by stability and familiarity for both sexes; in adulthood either one or the other sex changes groups. The natal group provides a social network of matrilineal kinship; after sexual maturity incest avoidance and exogamy are the rule. Important differences exist across species and between the sexes in mating strategies. In most species, males emigrate, but in others females do so. Male sexual behavior is based on competition between peers; females exercise choice in selecting sexual partners. Normal development of sexual behavior and maternal caretaking …
Abnormal Behavior As An Indication Of Immaterial Suffering, Hans Hinrich Sambraus
Abnormal Behavior As An Indication Of Immaterial Suffering, Hans Hinrich Sambraus
Sentience Collection
Reactive abnormal behavior is the convincing proof of immaterial suffering for the ethologist. We consider abnormal that behavior which does not correspond to, or is without object, which appears with sharply increased or decreased frequency, or which is abnormal in its motor pattern. Moreover, much reactive abnormal behavior manifests itself in stereotypies, i.e., the movement is repeated continuously in the same way. Among wild animals and in traditional forms of animal production abnormal behavior is unknown. However, it is encountered often in animals in intensive husbandry systems, and it can be demonstrated that abnormal behavior is actually brought about by …
Stress: What Is It And How Can It Be Quantified?, T. H. Friend
Stress: What Is It And How Can It Be Quantified?, T. H. Friend
International Journal for the Study of Animal Problems
An animal may be considered to be in a state of stress if abnormal behavior or extreme adjustments in its behavior or physiology are necessary in order to cope with adverse aspects of its environment. Methods used to determine if an animal is stressed can be either behavioral or physiological. Behavioral methods may be highly erroneous due to their subjective nature since alterations in behavior do not necessarily prove that an animal is stressed. There is no single measure of stress that can be used in all situations at this time. Every measure must be critically evaluated to ensure that …
Ethology And Laboratory Animal Welfare, James A. Cohen
Ethology And Laboratory Animal Welfare, James A. Cohen
International Journal for the Study of Animal Problems
No abstract provided.
The Psychological Relations Hip Between Dairy Cows And Dairy Cowmen And Its Implications For Animal Welfare, Martin F. Seabrook
The Psychological Relations Hip Between Dairy Cows And Dairy Cowmen And Its Implications For Animal Welfare, Martin F. Seabrook
International Journal for the Study of Animal Problems
No abstract provided.
The Effect Of Stress On Livestock And Meat Quality Prior To And During Slaughter, Temple Grandin
The Effect Of Stress On Livestock And Meat Quality Prior To And During Slaughter, Temple Grandin
International Journal for the Study of Animal Problems
The effects of stress on cattle, pigs and sheep prior to slaughter are reviewed. Long-term preslaughter stress, such as fighting, cold weather, fasting and transit, which occurs 12 to 48 hours prior to slaughter depletes muscle glycogen, resulting in meat which has a higher pH, darker color, and is drier. Short-term acute stress, such as excitement or fighting immediately prior to slaughter, produced lactic acid from the breakdown of glycogen. This results in meat which has a lower pH, lighter color, reduced water binding capacity, and is possibly tougher. Psychological stressors, such as excitement and fighting, will often have a …
A Review Of The Behavioural Mechanism Of Milk Ejection Of The Domestic Pig, David Fraser
A Review Of The Behavioural Mechanism Of Milk Ejection Of The Domestic Pig, David Fraser
Feeding Behavior Collection
The domestic pig has complex nursing and suckling behaviour, consisting of several distinct phases of suckling by the piglets and a characteristic pattern of grunting by the sow. A review of observations and experimental findings suggests cause-and-effect relationships between the different elements of sow and piglet behaviour, and the relationship of the behaviour to milk ejection. Characteristic features of pig nursing and suckling behaviour are interpreted as an adaptation promoting even distribution of milk among a number of precocious litter-mates.
Stress: What Is It And How Can It Be Quantified?, T. H. Friend
Stress: What Is It And How Can It Be Quantified?, T. H. Friend
Sentience Collection
An animal may be considered to be in a state of stress if abnormal behavior or extreme adjustments in its behavior or physiology are necessary in order to cope with adverse aspects of its environment. Methods used to determine if an animal is stressed can be either behavioral or physiological. Behavioral methods may be highly erroneous due to their subjective nature since alterations in behavior do not necessarily prove that an animal is stressed. There is no single measure of stress that can be used in all situations at this time. Every measure must be critically evaluated to ensure that …
Livestock Behavior As Related To Handling Facilities Design, Temple Grandin
Livestock Behavior As Related To Handling Facilities Design, Temple Grandin
International Journal for the Study of Animal Problems
A knowledge of the behavior of different species of livestock as we// as different breeds within a particular species is essential to the proper planning of a handling facility. An optimal facility should incorporate features which minimize stress on the animal and maximize the efficiency of movement from holding pen to slaughter area. Handler awareness of the animals' perception of critical distance flight zone and personal space requirements also reduces problems with balkin; and alarm behavior. Many improvements can be made with relative ease, thus enabling already existing facilities to upgrade their operations.
The Ontogeny And Organization Of Comfort Behavior In Adelie Penguins, Marc Bekoff, David G. Ainley, Anne Bekoff
The Ontogeny And Organization Of Comfort Behavior In Adelie Penguins, Marc Bekoff, David G. Ainley, Anne Bekoff
Ethology Collection
No abstract provided.
Quantitative Analyses Of The Ontogeny Of Predatory Behaviour In Coyotes, Canis Latrans, Louis E. Vincent, Marc Bekoff
Quantitative Analyses Of The Ontogeny Of Predatory Behaviour In Coyotes, Canis Latrans, Louis E. Vincent, Marc Bekoff
Ethology Collection
Four infant coyotes (Canis latrans) were studied in order to describe quantitatively the development of predatory behaviour. Our results indicated that prior play and agonistic experience had virtually no effect on later predatory success. Also, there was no relationship between an individual's social rank and its prey-killing ability. Latency to kill was shortened when animals were tested in, pair and hunger level was not related to latency to kill. The results are discussed with respect to current 'functionalist' theories of play behaviour and Leyhausen's concept of the relative hierarchy of moods. The practice theory of play should be reconsidered in …
Social Communication In Canids: Evidence For The Evolution Of A Stereotyped Mammalian Display, Marc Bekoff
Social Communication In Canids: Evidence For The Evolution Of A Stereotyped Mammalian Display, Marc Bekoff
Ethology Collection
The variability in the duration and form of the canid play bow was studied in infant coyotes, wolves, wolf-dog hybrids, beagles, and adult free-ranging dogs. Both duration and form showed marked stereotypy. It appears that the role of this context-specific social signal in the communication of play intention has been fostered by selection for "morphological" stereotypy.
The Nursing Posture Of Domestic Sows And Related Behaviour, D. Fraser
The Nursing Posture Of Domestic Sows And Related Behaviour, D. Fraser
Rearing Behavior Collection
The nursing behaviour of the sow commonly involves upward rotation of the udder, movements of the head and legs, and rhythmic grunting. Aspects of this behaviour were studied in several experiments with pregnant females, juveniles males, and suckling piglets. Many pregnant females lay down and assumed the nursing posture when their udders were first rubbed by hand. Those which initially appeared agitated in the experimenter's presence often failed to do so until after some habituation to the procedure. When the upper and lower rows of teats were rubbed alternately, the udder was usually rotated toward the stimulation. This rotation, like …
Vocalizations Of Isolated Piglets. Ii. Some Environmental Factors, D. Fraser
Vocalizations Of Isolated Piglets. Ii. Some Environmental Factors, D. Fraser
Communication Skills Collection
The vocalizations of suckling piglets were studied during brief tests which involved social isolation, restriction of movement, and exposure to unfamiliar surroundings. Similar trends were shown in most cases by the three classes of call studied - closed mouth grunts, open mouth grunts, and squeals. The rate of calling was much lower when a piglet was in the home pen than when alone in an unfamiliar pen, and more calls were given in both situations when the animal’s movement was restricted by caging. The presence of the dam and four littermates in unfamiliar surroundings caused a large reduction in calling, …
Vocalizations Of Isolated Piglets. I. Sources Of Variation And Relationships Among Measures, D. Fraser
Vocalizations Of Isolated Piglets. I. Sources Of Variation And Relationships Among Measures, D. Fraser
Communication Skills Collection
The vocalizations and activity of suckling piglets aged 4 to 25 days were studied during 5-min periods of social isolation in an unfamiliar enclosure. The animals became very active and vocalized repeatedly during the test, but the reaction was attenuated among older litters. Calls were predominantly closed mouth grunts at low rates of calling, and mainly squeals and open mouth grunts at high overall rates. Squealing correlated with open mouth grunting and with the activity measure both within and between litters. Even so, the measures appeared to be affected independently by the piglets’ behaviour in the home pen just before …
The Communication Of Play Intention: Are Play Signals Functional?, Marc Bekoff
The Communication Of Play Intention: Are Play Signals Functional?, Marc Bekoff
Sentience Collection
No abstract provided.
Social Play In Coyotes, Wolves, And Dogs, Marc Bekoff
Social Play In Coyotes, Wolves, And Dogs, Marc Bekoff
Ethology Collection
No abstract provided.