scholarly journals Social behaviour of European grayling before and after flow peaks in restored and unrestored habitats

2020 ◽  
Vol 36 (8) ◽  
pp. 1646-1655
Author(s):  
Johan Watz ◽  
David Aldvén ◽  
Antonis Apostolos Brouziotis ◽  
Niclas Carlsson ◽  
Eirini Karathanou ◽  
...  
Animals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2929
Author(s):  
Jeannette C. Lange ◽  
Anita Lange ◽  
Ute Knierim

The welfare of male fattening pigs may be improved by refraining from castration, but may be compromised, in turn, by harmful social behaviour in groups of boars. In addition, boar taint may be problematic. This study aimed to evaluate these potential problems in boar fattening under commercial organic conditions. In total, 625 boars were compared with 433 barrows and 83 gilts regarding their social behaviour, lesions and lameness at 80 kg, before and after split marketing. The mixed-model analysis showed that significantly more short agonistic interactions, fights and mounting behaviours were observed in groups of boars. Agonistic interactions were reduced in spring/summer and when boars grew older. Fights and mounts were increased when boars had contact to female pigs in the neighbouring pen. No effect of split marketing, growth rate, homogeneity of groups, group size, feeding space and illumination hours could be detected. Increased interaction frequencies did not result in significantly more skin lesions, lameness, treatments or mortality. Increased space allowance reduced skin lesions. On 9.8% of the dissected boars’ penises, wounds were detected; they were absent on two farms with generous litter provision. Boar taint prevalence, as detected by human nose method, was 1.44%. Under the studied organic husbandry conditions, boar fattening appears to be practicable, although penile injuries should be monitored at slaughter.


2021 ◽  
Vol 7 (1) ◽  
pp. 73-86
Author(s):  
Mahfouda Rashid Al Mushaqiri ◽  
Zahari Bin Ishak ◽  
Wail Muin Ismail

Purpose – This research aims to measure the effects of the peace education program on the social and emotional behaviours of preschool children in the Sultanate of Oman. Children should be equipped with basic values, such as respecting the efforts and ideas of others, forming a comprehensive and positive relationship with people, possessing the skills of empathy, and resolving conflicts in peaceful ways.Design/methods/approach – The researcher adopted the quasi-experimental approach, and the current study presented the Peace Education Program (PEP) for children aged 4–6 years in the Sultanate of Oman. The participants consisted of 40 children in the experimental group and 40 children in the control group. The researcher used a scale with picture choice questions containing two pictures per question to measure the behaviours of children before and after the treatments. The peace education program for the study also included 28 training sessions that were presented for 15 weeks at a duration of one hour per session.Findings – The current study results also favoured the experimental group, as an improvement in their social behaviour was observed after joining the program.Research implications/limitations – The research demonstrates that peace is a key prerequisite for developing a balanced life, especially in childhood.  The results may be of great significance in measuring and improving children's behaviour through (PEP).Practical implications – The study findings may likely be fruitful to Oman's pupils, educators, curriculum designers, and educational policy-makers.Originality/value – This study has been successful in focusing on some aspects of growth and behaviour enhancement in children. Paper type Research paper


1982 ◽  
Vol 10 (3) ◽  
pp. 253-272 ◽  
Author(s):  
William R. Lindsay

The conversation of three small groups of manual workers was observed in order to provide tangible goals for conversation training. A wide range of conversation styles emerged from the data, providing ranges of responding for various behaviours like percentages of short initiations, longer initiations, questions and length of latencies. Ranges of responding were also shown for the patterns of certain types of conversation involving initiations and reactions to these utterances. Despite the wide ranges of style in the conversation of the normal groups, their behaviour was in marked contrast to three small groups of socially inept psychiatric patients, in that, the patients were discrepant on every index of social behaviour. The study provides clear targets for conversation training programmes in terms of both the frequencies with which patients should engage in behaviour and the patterns of utterances with which patients might respond. To illustrate the way in which the data act as goals, patient groups are compared before and after treatment


2015 ◽  
Vol 5 (1) ◽  
pp. 53-69
Author(s):  
Robi Kroflič ◽  
Helena Smrtnik Vitulič

The aim of the present study was to ascertain the effects of the five-month implementation of the comprehensive inductive educational approach on the social behaviour of kindergarten children. The sample consisted of 52 children in the experimental group and 48 children in the control group, aged from 2.6 to 6.0 years. The kindergarten teachers responsible for thetwo groups completed the Slovenian version of the Social Competence and Behaviour Evaluation questionnaire before and after the implementation of the approach. The children in the experimental group achieved higher scores than those in the control group on five of the eight basic scales of social behaviour, and on two of the three composite scales, as well as onthe general result of social adaptation. It can be concluded that the implementation of the comprehensive educational approach influenced various aspects of the children’s social behaviour.


2020 ◽  
Vol 43 ◽  
Author(s):  
Julian Kiverstein ◽  
Erik Rietveld

Abstract Veissière and colleagues make a valiant attempt at reconciling an internalist account of implicit cultural learning with an externalist account that understands social behaviour in terms of its environment-involving dynamics. However, unfortunately the author's attempt to forge a middle way between internalism and externalism fails. We argue their failure stems from the overly individualistic understanding of the perception of cultural affordances they propose.


Author(s):  
J. Temple Black

Tool materials used in ultramicrotomy are glass, developed by Latta and Hartmann (1) and diamond, introduced by Fernandez-Moran (2). While diamonds produce more good sections per knife edge than glass, they are expensive; require careful mounting and handling; and are time consuming to clean before and after usage, purchase from vendors (3-6 months waiting time), and regrind. Glass offers an easily accessible, inexpensive material ($0.04 per knife) with very high compressive strength (3) that can be employed in microtomy of metals (4) as well as biological materials. When the orthogonal machining process is being studied, glass offers additional advantages. Sections of metal or plastic can be dried down on the rake face, coated with Au-Pd, and examined directly in the SEM with no additional handling (5). Figure 1 shows aluminum chips microtomed with a 75° glass knife at a cutting speed of 1 mm/sec with a depth of cut of 1000 Å lying on the rake face of the knife.


Author(s):  
R. F. Bils ◽  
W. F. Diller ◽  
F. Huth

Phosgene still plays an important role as a toxic substance in the chemical industry. Thiess (1968) recently reported observations on numerous cases of phosgene poisoning. A serious difficulty in the clinical handling of phosgene poisoning cases is a relatively long latent period, up to 12 hours, with no obvious signs of severity. At about 12 hours heavy lung edema appears suddenly, however changes can be seen in routine X-rays taken after only a few hours' exposure (Diller et al., 1969). This study was undertaken to correlate these early changes seen by the roengenologist with morphological alterations in the lungs seen in the'light and electron microscopes.Forty-two adult male and female Beagle dogs were selected for these exposure experiments. Treated animals were exposed to 94.5-107-5 ppm phosgene for 10 min. in a 15 m3 chamber. Roentgenograms were made of the thorax of each animal before and after exposure, up to 24 hrs.


Author(s):  
M. H. Wheeler ◽  
W. J. Tolmsoff ◽  
A. A. Bell

(+)-Scytalone [3,4-dihydro-3,6,8-trihydroxy-l-(2Hj-naphthalenone] and 1,8-di- hydroxynaphthalene (DHN) have been proposed as intermediates of melanin synthesis in the fungi Verticillium dahliae (1, 2, 3, 4) and Thielaviopsis basicola (4, 5). Scytalone is enzymatically dehydrated by V. dahliae to 1,3,8-trihydroxynaphthalene which is then reduced to (-)-vermelone [(-)-3,4- dihydro-3,8-dihydroxy-1(2H)-naphthalenone]. Vermelone is subsequently dehydrated to DHN which is enzymatically polymerized to melanin.Melanin formation in Curvularia sp., Alternaria sp., and Drechslera soro- kiniana was examined by light and electron-transmission microscopy. Wild-type isolates of each fungus were compared with albino mutants before and after treatment with 1 mM scytalone or 0.1 mM DHN in 50 mM potassium phosphate buffer, pH 7.0. Both chemicals were converted to dark pigments in the walls of hyphae and conidia of the albino mutants. The darkened cells were similar in appearance to corresponding cells of the wild types under the light microscope.


Author(s):  
T. Gulik-Krzywicki ◽  
M.J. Costello

Freeze-etching electron microscopy is currently one of the best methods for studying molecular organization of biological materials. Its application, however, is still limited by our imprecise knowledge about the perturbations of the original organization which may occur during quenching and fracturing of the samples and during the replication of fractured surfaces. Although it is well known that the preservation of the molecular organization of biological materials is critically dependent on the rate of freezing of the samples, little information is presently available concerning the nature and the extent of freezing-rate dependent perturbations of the original organizations. In order to obtain this information, we have developed a method based on the comparison of x-ray diffraction patterns of samples before and after freezing, prior to fracturing and replication.Our experimental set-up is shown in Fig. 1. The sample to be quenched is placed on its holder which is then mounted on a small metal holder (O) fixed on a glass capillary (p), whose position is controlled by a micromanipulator.


Author(s):  
R. M. Anderson

Aluminum-copper-silicon thin films have been considered as an interconnection metallurgy for integrated circuit applications. Various schemes have been proposed to incorporate small percent-ages of silicon into films that typically contain two to five percent copper. We undertook a study of the total effect of silicon on the aluminum copper film as revealed by transmission electron microscopy, scanning electron microscopy, x-ray diffraction and ion microprobe techniques as a function of the various deposition methods.X-ray investigations noted a change in solid solution concentration as a function of Si content before and after heat-treatment. The amount of solid solution in the Al increased with heat-treatment for films with ≥2% silicon and decreased for films <2% silicon.


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