大熊猫与同域动物在海拔分布上的生态位分化

大熊猫（Ailuropoda melanoleuca）是中国的特有物种,其成功放归可能受放归地气候、栖息地、同域动物等多种因素的影响。本研究在野外调查的基础上,基于生态位理论等方法,探讨了栗子坪国家级自然保护区大熊猫与其大中型同域动物的空间关系。调查结果表明,该保护区内大熊猫同域动物共20种,分别属于2纲5目,其中东洋型分布物种占优势（30%）。大熊猫同域动物分布海拔显著低于大熊猫的分布海拔（P＜0.05）,大熊猫分别与灵长目等5个目的动物在海拔分布上均存在显著的生态位分化（P＜0.001）。灵长目动物在空间分布上与大熊猫分布相异,而其他目的动物与大熊猫空间分布类似。偶蹄目动物痕迹数量占比最高（54.14 %）,而食肉目的小熊猫与大熊猫样线共同遇见率达到了43.75%。本研究结果表明,该地大熊猫同域动物较为丰富,在海拔分布上与大熊猫存在生态位分化。该研究可为圈养大熊猫的放归提供参考依据。     

The effect of light on oxygen consumption in two amphipod crustaceans–the hypogean Niphargus stygius and the epigean Gammarus fossarum

The effects of light on the metabolic rates of the hypogean amphipod Niphargus stygius and the epigean amphipod Gammarus fossarum were compared by measuring oxygen consumption and respiratory electron transport system (ETS) activity. They were exposed to light intensities of 720 and 4700?lx at 10°C. Oxygen consumption increased significantly in N. stygius exposed to both low and high intensities of light, but no significant increase was observed in G. fossarum at either intensity. The increase of oxygen consumption in N. stygius was significantly greater at the higher light intensity. This indicates a stress response in which exploitation of half the metabolic potential for energy production in N. stygius during exposure to high light intensity constitutes an adverse effect on its metabolism, since this species usually uses less than 25% of its total metabolic potential for standard metabolic demands.     

The Use of Positive Reinforcement in Training Zebra Sharks (Stegostoma fasciatum)

Few studies have examined how personality traits may be related to the amounts and types of attachments humans have toward companion animals (pets). In this study, 1,098 companion animal guardians (owners) completed a survey that included the Big Five Inventory, the Lexington Attachment to Pets Scale, and the Pet Attachment Questionnaire. Each participant chose whether he or she identified as a Cat Person, Dog Person, Both, or Neither. Results indicated that neuroticism, conscientiousness, choosing a dog as a favorite pet, and identifying as a Cat Person, Dog Person, or Both predicted affection for a pet. Conscientiousness, extraversion, and openness decreased avoidant attachment to pets, and neuroticism increased anxious attachment to pets. Both dogs and cats could benefit from pet owners who are conscientious, and there may be some benefits of neuroticism in pet owners. The findings of this study will advance understanding of the human–animal bond. As this understanding increases, measurements of human attachment and personality may be useful for the development of tools that could assist shelter employees and veterinarians in counseling people about pet ownership.     

Spin Trapping of Free Radicals Produced in vivo in Heart and Liver During Endotoxemia

Studies using free radical scavengers and measurements of lipid peroxidation have suggested that free radicals are generated during endotoxemia. Conclusions from these studies have implied that free radicals may participate in the sequence of pathologic events following endotoxin challenge in the experimental animal. Current inferences of free radical generation and involvement have been derived from indirect evidence and are therefore inconclusive. To quantitate the generation of free radicals in vivo during endotoxemia this study employed the use of electron paramagnetic resonance spectroscopy (EPR) combined with spin trapping techniques. Five minutes before intraperitoneal endotoxin administration, trimethoxy-a-phenyl-t-butyl-nitrone [(MeO), PBN] was administered intraperitoneally. Experimental animals were always matched with control animals receiving no endotoxin. At either five minutes or twenty-five minutes following endotoxin administration animals were decapitated and hearts and livers were rapidly taken for lipid extraction and EPR evaluation. Analysis of the EPR spectra revealed hyperfine splitting constants that indicated the presence of carbon-centered radical spin adducts in both organ tissues from animals exposed to endotoxin for twenty-five minutes. No signals were present in hearts and livers taken five minutes after endotoxin administration. EPR evaluation did not indicate spin adduct formation in control tissue. These data directly demonstrate that activation of processes in vivo involving free radical generation occur early during endotoxemia, but are not detectable immediately after the endotoxin challenge.     

Persistence of extended-spectrum β-lactamase plasmids among Enterobacteriaceae in commercial broiler farms

To clarify the persistence of extended-spectrum β-lactamase (ESBL) producers, 13 plasmids from two broiler farms were analyzed. On the farm not using antimicrobials, one plasmid from Klebsiella pneumoniae isolated from a day-old chick was similar to that from Escherichia coli isolated a year later, with the deletion of two transposons. On the farm using antimicrobials, most circulating plasmids (eight out of nine) in a flock of 40-days-old chicks were identical, although one from K. pneumoniae had a deletion of a transposon carrying a class 1 integron containing aadA2 and dfrA12. Thus, ESBL plasmids persisted in the farms with or without antimicrobial agent use.     

The early extinction date of the beaver (Castor fiber) in Britain

This paper re-examines the evidence for the extinction of the beaver (Castor fiber) in South Britain and Scotland. Much of the evidence found by previous scholars is discounted as unreliable or outdated. A new study looks at reliable historical sources and studies references to the beaver in the context of references to comparable mammals, especially the most ecologically comparable [polecat (Mustela putorius), pine marten (Martes martes), otter (Lutra lutra) and badger (Meles meles)]. Each of these mammals was present in every period studied, meaning that medieval authors were reliable witnesses to the species' presence. The beaver is present in comparable numbers to the other mammals in South Britain 1188–1307 and in Scotland 1526–1600, meaning that as a species it was frequently recorded by humans. References to it cease after 1308 in South Britain, except a single anomalous entry, and after 1600 in Scotland. The idea that this reflects a sample bias or random chance is discounted. The paper rejects the late extinction scenario and concludes that the beaver became extinct by 1300 in South Britain and by 1600 in Scotland.     

Dog training as a violence prevention tool for at-risk adolescents

Abstract

Humane education programs often target at-risk children and seek to teach empathy and gentleness with animals, but few of these have been assessed. This prospective, longitudinal study examined the effects of “Teaching Love and Compassion” (TLC), a humane education program employing educational group discussions and dog training for seventh-grade, inner city youth in Los Angeles, California. The TLC program is offered to groups of 10 to 12 students during their three-week vacation at the year-round school. Students for the experimental and control groups were selected from the pool of those scoring below the 25th percentile in reading and mathematics. The study, conducted over a two-year period, assessed four successive sessions, comprising an experimental group of 41 children and a control group of 42 children. In morning sessions, the experimental group had discussions focusing on interpersonal issues and conflict management. In the afternoons they were taught the proper care and obedience training of shelter dogs. Pre-, post-, and follow-up tests, specially developed to accommodate the children's reading ability and scheduling constraints, were given to both the experimental and control groups to assess their knowledge of animal care, conflict management skills, attitudes toward self and others, and fear of dogs. Members of the experimental group increased their understanding of pet care and the needs of animals and retained this information more than did the control group for all four TLC sessions, both at post-testing (F=58.4, p=0.0001) and follow-up testing (F=18.9, p=0.0001). At post-testing, the experimental group showed a trend toward a decreased fear of dogs (F=3.6, p=0.062), that was significant at follow-up testing (F=4.2, p=0.019). For these children who are exposed to daily violence and aggression to people and animals, these modest changes were associated with the three-week intervention.     

Attitude to Animals and Empathy: Comparing Animal Protection and General Community Samples

ABSTRACT

Although a number of studies have examined a range of demographic and personality variables that may impact upon attitudes towards the treatment of non-human species, little consensus has been reached within the literature. The aim of the current study was to evaluate and assess levels of human-directed empathy and attitudes towards the treatment of animals in two diverse populations, namely the general community (n = 543) and those within the animal protection field (n = 389). Both groups of participants completed the Attitude Towards the Treatment of Animals Scale (AAS) and the Davis Interpersonal Reactivity Index (IRI), a measure of human-directed empathy. Comparisons between the two samples indicated that those within the animal protection community scored more highly on both the animal attitude and human-directed empathy measures. Correlational analyses revealed a positive relation between AAS and IRI scores for both samples, whilst the strength of the correlation was greater for those within the animal protection sample. These findings are discussed.     

Personality,empathy and attitudes to animal welfare

Abstract

A total of 833 students completed a four-part questionnaire which measured demographic factors (sex, education, vegetarianism, religiousness), attitudes to animal experimentation, personality (Big Five) and empathy. Attitudes to animal experimentation factored into five interpretable factors, and multiple regression analyses were used to examine the extent to which demographic factors, personality and empathy predicted these. Sex, vegetarianism, Agreeableness, Openness, Extraversion and empathy were significant predictors of all these factors. Results showed an interpretable set of correlates that were similar to previous studies in the area. As with previous research findings, the measures used predicted only a small amount of variance with respect to attitudes to animals.     

Attitudes toward Animals among German Children and Adolescents

ABSTRACT

This is the first study about attitudes toward animals among German children and adolescents. A sample of 543 pupils (261 boys, 282 girls) aged 11 to 17 (mean age = 13.37 ± 2.01 years) completed a questionnaire based on different established scales, for example, the Animal Attitude Scale (AAS) and the Intermediate Attitude Scale (IAS). Several aspects of attitudes toward animals and various dimensions of human–animal relationships were measured, including gender, age, grade, pet ownership, animal-related activities, meat consumption, and fear of and disgust toward animals. Gender and age were important factors in determining attitudes toward animals: pro-animal attitudes decreased with age and girls showed more positive attitudes compared with boys. Pet ownership and animal-related activities were associated with more positive attitudes toward animals, whilst meat consumption was related to lower pro-animal attitudes. There were no correlations between fear and general attitudes toward animals. The correlations between disgust and attitudes toward animals were weak. We found significant correlations among the different scales and subscales in animal attitudes.