| 1. |
- Otero, Jaime, et al.
(författare)
-
Basin-scale phenology and effects of climate variability on global timing of initial seaward migration of Atlantic salmon (Salmo salar)
- 2014
-
Ingår i: Global Change Biology. - : Wiley. - 1354-1013 .- 1365-2486. ; 20:1, s. 61-75
-
Tidskriftsartikel (refereegranskat)abstract
- Migrations between different habitats are key events in the lives of many organisms. Such movements involve annually recurring travel over long distances usually triggered by seasonal changes in the environment. Often, the migration is associated with travel to or from reproduction areas to regions of growth. Young anadromous Atlantic salmon (Salmo salar) emigrate from freshwater nursery areas during spring and early summer to feed and grow in the North Atlantic Ocean. The transition from the freshwater ('parr') stage to the migratory stage where they descend streams and enter salt water ('smolt') is characterized by morphological, physiological and behavioural changes where the timing of this parr-smolt transition is cued by photoperiod and water temperature. Environmental conditions in the freshwater habitat control the downstream migration and contribute to within- and among-river variation in migratory timing. Moreover, the timing of the freshwater emigration has likely evolved to meet environmental conditions in the ocean as these affect growth and survival of the post-smolts. Using generalized additive mixed-effects modelling, we analysed spatio-temporal variations in the dates of downstream smolt migration in 67 rivers throughout the North Atlantic during the last five decades and found that migrations were earlier in populations in the east than the west. After accounting for this spatial effect, the initiation of the downstream migration among rivers was positively associated with freshwater temperatures, up to about 10 °C and levelling off at higher values, and with sea-surface temperatures. Earlier migration occurred when river discharge levels were low but increasing. On average, the initiation of the smolt seaward migration has occurred 2.5 days earlier per decade throughout the basin of the North Atlantic. This shift in phenology matches changes in air, river, and ocean temperatures, suggesting that Atlantic salmon emigration is responding to the current global climate changes.
|
|
| 2. |
- Eklöf, Mats, et al.
(författare)
-
Workplace intervention for improved risk perception and preventive activity among workers : using hand-held vibrating machines: a pilot study
- 2023
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This article presents a pilot study of a 1-h workplace educational intervention implemented among ten construction workers who were highly exposed to hand–arm vibration. The intervention combined risk communication and normative expert advice intended to reinforce preventive behaviour related to vibration, noise, and biomechanical loads. Data for this study comprised intervention notes and interview data from interventionists, and pre- and post-intervention interview data from participating workers.The results suggested that the intervention was sensitive to disturbances and should be directed only to motivated workers possessing sufficient self-efficacy, and only in circumstances in which exposure may be controlled on the local workplace level and by locally implemented measures. Unless these conditions are present, the studied intervention may fail to influence preventive behaviour, and may instead cause cognitive dissonance and frustration among participants and interventionists.
|
|
| 3. |
|
|
| 4. |
|
|
| 5. |
- Jonsson, Kjell, 1948-
(författare)
-
De mest inflytelserika?
- 2009
-
Ingår i: Axess. - 1651-0941. ; :2, s. 18-21
-
Tidskriftsartikel (populärvet., debatt m.m.)
|
|
| 6. |
- Jonsson, Kjell, 1948-, et al.
(författare)
-
Den undflyende lukten
- 2018
-
Ingår i: Kulturella perspektiv - Svensk etnologisk tidskrift. - Umeå. - 1102-7908. ; 27:1-2, s. 14-28
-
Tidskriftsartikel (refereegranskat)abstract
- The Fleeting Sense of Smell (Den undflyende lukten)This is an overview of the elusive sense of smell, both from a historical/cultural and psychological perspective. We follow two themes. In the first, we describe the repeated efforts to understand and categorize human olfaction, from antiquity to present day. We disseminate how smell has been positioned in sensory hierarchies, describe odor classifications systems and discuss differing views on the relationship between odor and health. The second theme regards how odors and the senseitself has been used as a means for understanding, separating and classifying other phenomena. Odors have throughout history been used to de- marcate class boundaries; the (non-)reliance of the sense of smell has been seen as an indication of civilization. Olfactory acuity is used to separate humans from animals, women from men, and young from old. These smell-based taxonomies persist, despite having no clear backing from em- pirical evidence. Finally, we suggest that the inter- est in smell may be on the rise, both from a societal and scientific perspective.
|
|
| 7. |
|
|
| 8. |
- Jonsson, Kjell, 1948-
(författare)
-
Förord : Bildning, utveckling och frihet
- 2012
-
Ingår i: Om gränserna för statens verksamhet. - Umeå : h:ström - Text & Kultur. - 9789173271264 ; , s. 7-22
-
Bokkapitel (populärvet., debatt m.m.)
|
|
| 9. |
|
|
| 10. |
- Jonsson, Kjell, 1948-
(författare)
-
Lukten ett vetenskapligt mysterium
- 2014
-
Ingår i: Västerbottens-Kuriren. - : Stiftelsen VK-Press. - 1104-0246.
-
Tidskriftsartikel (populärvet., debatt m.m.)
|
|
