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| Author | Meriggi,A.; Lovari, S. | ||||
| Title | A Review of Wolf Predation in Southern Europe: Does the Wolf Prefer Wild Prey to Livestock? | Type | Journal Article | ||
| Year | 1996 | Publication | Journal of Applled Ecology | Abbreviated Journal | J. Appl. Ecol |
| Volume | 33 | Issue | Pages | 1561-1571 | |
| Keywords | Canis lupus, conservation, food habits, prey abundance, prey availability. | ||||
| Abstract | 1. The recent recovery of the wolf in southern Europe has not yet removed the risk of local extinction. Wolf populations are fragmented and often comprise fewer than 500 individuals. In North America, northern and eastern Europe, wolves feed maiiily on wild herbivores. In southern Europe, this canid has apparently adapted to feed also on fruit, rubbish, livestock, small and medium-size mammals. 2. The main conservation problem lies with predation o n domestic ~ingulates,w liich leads to extensive killing of wolves. The reintroduction of wild large herbivores has been advocated as a means of reducing attacks on livestock, but predatiori on the latter may remain high if domestic ungulates are locally abundant. 3. Our synthesis of 15 studies, published in the last 15 years, on food habits of the wolf in southern Europe, has shown that ungulates have been the main diet component overall. A significant inverse correlation was found between the occurrence (%) of wild and domestic ungulates in the diet. The presence of relatively few wild ungulate species was necessary to reduce predation on livestock. 4. Selection of wild and domestic ungulate prey was influenced mainly by their local abundance, but also by their accessibility. Feeding dependence on rubbish was local and rare. In Italy, the consumption of riibbish/fruit and that of ungulates was significantly negatively correlated. Diet breadth increased as the presence of large prey in tlie diet decreased. 5. The simultaneous reintroduction of severa1 wild ungulate species is likely to reduce predation on livestock and may prove to be one of the most effective conservation measures. |
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 6387 | ||
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| Author | Zentall, T.R.; Sutton, J.E.; Sherburne, L.M. | ||||
| Title | True imitative learning in pigeons | Type | Journal Article | ||
| Year | 1996 | Publication | Psychol Sci | Abbreviated Journal | |
| Volume | 7 | Issue | Pages | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ Zentall1996 | Serial | 6372 | ||
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| Author | Kruska, D. | ||||
| Title | The effect of domestication on brain size and composition in the mink (Mustela vison) | Type | Journal Article | ||
| Year | 1996 | Publication | J Zool | Abbreviated Journal | |
| Volume | 239 | Issue | Pages | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ Kruska1996 | Serial | 6234 | ||
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| Author | Tomasello, M. | ||||
| Title | Do apes ape? | Type | Book Chapter | ||
| Year | 1996 | Publication | Social learning in animals: the roots of culture | Abbreviated Journal | |
| Volume | Issue | Pages | 319-346 | ||
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| Publisher | Academic Press | Place of Publication | London | Editor | Heyes, C. M.; Galef, B.G. |
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5600 | ||
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| Author | Beerda, B.; Schilder, M.B.H.; Janssen, N.S.C.R.M.; Mol, J.A. | ||||
| Title | The Use of Saliva Cortisol, Urinary Cortisol, and Catecholamine Measurements for a Noninvasive Assessment of Stress Responses in Dogs | Type | Journal Article | ||
| Year | 1996 | Publication | Hormones and Behavior | Abbreviated Journal | Horm. Behav. |
| Volume | 30 | Issue | 3 | Pages | 272-279 |
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| Abstract | A problem in assessing animal welfare is that collecting data in itself may be stressful to the animals. Therefore, noninvasive methods for collecting data have to be devised and tested. A first step in investigating saliva cortisol, urinary cortisol, and urinary catecholamine as noninvasive indicators of canine well-being is the validation of these hormonal measures as alternatives for those in plasma. Using a model of insulin (0.2 U/kg)-induced hypoglycemia, we report on stress-induced responses in saliva cortisol, urinary cortisol, and urinary catacholamines relative to cortisol and catecholamine responses in plasma. Hypoglycemia in six dogs induced significant (P< 0.05) increases in plasma cortisol and adrenaline but not noradrenaline. Saliva cortisol responses expressed as net area under the response curve correlated significantly with plasma cortisol responses (r> 0.92). Saliva cortisol levels measured 7 to 12% of plasma cortisol concentrations. Cortisol/creatinine ratios in urine were significantly higher when voided after insulin administeration, compared to when voided after saline treatment. Insulin-induced increments in cortisol/creatinine ratios were nonsignificant when urine samples were assayed after dichloromethane extraction. Although urinary adrenaline/creatinine (A/C) ratios were significantly correlated with maximum plasma adrenaline values after insulin administration, A/C ratios did not differ significantly between insulin and saline treatment. The present experiment provides strong support for using saliva sampling and urine collection as noninvasive methods to establish stress-induced cortisol responses. For measuring acute plasma adrenaline responses, measuring A/C ratios may not be a valid alternative. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0018-506x | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5574 | ||
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| Author | Pollard, J.C.; Littlejohn, R.P. | ||||
| Title | The effects of pen size on the behaviour of farmed red deer stags confined in yards | Type | Journal Article | ||
| Year | 1996 | Publication | Applied Animal Behaviour Science | Abbreviated Journal | Appl. Anim. Behav. Sci. |
| Volume | 47 | Issue | 3-4 | Pages | 247-253 |
| Keywords | Red deer; Handling; Density; Aggression; Farming | ||||
| Abstract | To determine whether pen size affected the behaviour and welfare of farmed red deer confined temporarily in yards, four groups of ten 2-year-old stags were confined for 40 min or 2 days in each of spring and summer, in either large (5 m × 4 m ) or small (2.5 m × 4) pens. In the small pens, wall pacing and vertical/horizontal head movements at the walls were more frequently observed (P < 0.05) and were carried out by a greater percentage of the deer (P < 0.001), and distances between individuals were smaller (P < 0.01), than observations in the large pens. Aggressive activities varied seasonally, with head-butting and chasing being seen most frequently in the spring (P < 0.05) and biting and kicking being seen most frequently in the summer (P < 0.05), and the overall frequency of aggressive activities was low in summer. In spring, in small pens there were fewer threats to head-butt, head butts by moving animals, and less stepping activity than in large pens (P < 0.05). In summer, in small pens there were more threats to butt and more stepping activity than in the large pens (P < 0.05). In both seasons, aggressive activities were correlated with wall pacing (r = 0.58 and 0.55, respectively). It was concluded that the effect of pen size on the frequency and nature of aggressive and other activities varied seasonally. In order minimise aggression and stepping activity, small pens were favoured in spring and large pens were favoured in summer. However, in both seasons there were greater inter-individual distances and reduced pacing and head movements at the walls in large pens. This latter finding may indicate that the large pens were less aversive to the deer, regardless of season. | ||||
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| ISSN | 0168-1591 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5472 | ||
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| Author | Nishida, T.; Hosaka K. | ||||
| Title | Coalition strategies among adult male chimpanzees of the Mahale Mountains, Tanzania. | Type | Book Chapter | ||
| Year | 1996 | Publication | Great Ape Societies. | Abbreviated Journal | |
| Volume | Issue | Pages | 114-135 | ||
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| Publisher | Cambridge University Press | Place of Publication | Cambridge | Editor | McGrew, W. C.; Marchant, L. F.; Nishida, T. |
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5470 | ||
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| Author | Salmivalli, C.; Lagerspetz, K.; Björkqvist, K.; Österman, K.; Kaukiainen, A. | ||||
| Title | Bullying as a group process: Participant roles and their relations to social status within the group | Type | Journal Article | ||
| Year | 1996 | Publication | Aggressive Behavior | Abbreviated Journal | Aggr. Behav. |
| Volume | 22 | Issue | 1 | Pages | 1-15 |
| Keywords | aggressive behavior; peer relations; roles; social acceptance; social groups; victimization | ||||
| Abstract | Bullying was investigated as a group process, a social phenomenon taking place in a school setting among 573 Finnish sixth-grade children (286 girls, 287 boys) aged 12–13 years. Different Participant Roles taken by individual children in the bullying process were examined and related to a) self-estimated behavior in bullying situations, b) social acceptance and social rejection, and c) belongingness to one of the five sociometric status groups (popular, rejected, neglected, controversial, and average). The Participant Roles assigned to the subject were Victim, Bully, Reinforcer of the bully, Assistant of the bully, Defender of the victim, and Outsider. There were significant sex differences in the distribution of Participant Roles. Boys were more frequently in the roles of Bully, Reinforcer and Assistant, while the most frequent roles of the girls were those of Defender and Outsider. The subjects were moderately well aware of their Participant Roles, although they underestimated their participation in active bullying behavior and emphasized that they acted as Defenders and Outsiders. The sociometric status of the children was found to be connected to their Participant Roles. © 1996 Wiley-Liss, Inc. | ||||
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| Publisher | Wiley Subscription Services, Inc., A Wiley Company | Place of Publication | Editor | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1098-2337 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5435 | ||
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| Author | Frank S. A. | ||||
| Title | Policing and group cohesion when resources vary. | Type | Journal Article | ||
| Year | 1996 | Publication | Animal Behaviour | Abbreviated Journal | Anim. Behav. |
| Volume | 52 | Issue | Pages | 1163-1169 | |
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| Abstract | The transition from competing individuals to cooperative groups has occurred several times inevolutionary history. The puzzle is why selfish individuals did not subvert cohesive group behaviour bytaking resources without contributing to the group’s overall success. Kin selection and reciprocal altruism are the two standard explanations for group cohesion. But many groups have evolved into cooperative units when relatedness was low and opportunities were limited for the strategic alliances required for reciprocity. A new theory was recently proposed in which individuals invest some of their resources into repressing competition between group members. Such policing increases the fair distribution of resources in the group and enhances group cohesion. The surprising aspect of this theory is that low relatedness is more conducive to the spread of policing traits than is high relatedness. Here a new explanation is developed of the biological processes that favour policing. The model is then extended in two ways. First, more realism is added to the theory by accounting for the full range of costs and benefits associated with competitive and cooperative traits within groups. Second, another surprising result is introduced about cooperative evolution. Small variations in individual vigour or resources can lead to large variations in individual contributions to policing the group. Stronger individuals often invest all of their excess resources into policing, but weaker individuals do not contribute to group cohesion. |
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5429 | ||
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| Author | Gueron, S.; Levin, S.A.; Rubenstein, D.I. | ||||
| Title | The Dynamics of Herds: From Individuals to Aggregations | Type | Journal Article | ||
| Year | 1996 | Publication | Journal of Theoretical Biology | Abbreviated Journal | J. Theor. Biol. |
| Volume | 182 | Issue | 1 | Pages | 85-98 |
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| Abstract | The dynamic behavior of small herds is investigated by means of simulations of two-dimensional discrete-stochastic models. An individual-based approach is used to relate collective behavior to individual decisions. In our model, the motion of an individual in a herd is assumed to be the combined result of both density-independent and density-dependent decisions, in the latter case based on the influence of surrounding neighbors; assumed decision rules are hierarchical, balancing short range repulsion against long-range attraction. The probability of fragmentation of the model herd depends on parameter values. We explore the variety and characteristics of spatial patterns that develop during migration, for herds that are homogeneous and heterogeneous regarding intrinsic walking speeds. Group integrity can be maintained even in mixed populations, but fragmentation results for these more easily than for a homogeneous herd. Observations of natural populations suggest that animals move away from individuals that intrude too closely into their environment, but are attracted to individuals at a distance. Between these extremes, there appears to be a neutral zone, within which other individuals engender no response. We explore the importance of this neutral zone, and offer evolutionary interpretations. In particular, the neutral zone, if not too large, permits the individual to remain in contact with the herd, while reducing the frequency with which acceleration or deceleration must be undertaken. This offers obvious energetic benefits. | ||||
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| ISSN | 0022-5193 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5253 | ||
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