Himmelens barn

Soitinnus: lauluäänet (SSA).

Herdinnor och herdar [Kuorostemma]

Soitinnus: sekakuoro.

Herdinnor och herdar [Pianopartituuri]

Soitinnus: piano, sekakuoro.

Herdinnor och herdar [Pianopartituuri, keskeneräinen]

Soitinnus: piano, sekakuoro.

Julnatten för kör och orkester [1] [Partituuri]

Soitinnus: sekakuoro, orkesteri, urut (harmoni).

Julnatten för kör och orkester [2] [Partituuri]

Soitinnus: sekakuoro, orkesteri ja urut (harmoni).

Julnatten. Piano I och II

Soitinnus: urut, pianot (2).

Manuskript för sång och piano [1]

Soitinnus: lauluääni, piano.

Manuskript för sång och piano [2]

Soitinnus: lauluääni, piano.

Ouverture och Preghiera till "Junkerns förmyndare" [Stemmat]

Soitinnus: orkesteri.

Ouverture till "Biskop Henrik och bonden Lalli" [Stemmat]

Soitinnus: orkesteri.

Social huddling and physiological thermoregulation are related to melanism in the nocturnal barn owl.

Endothermic animals vary in their physiological ability to maintain a constant body temperature. Since melanin-based coloration is related to thermoregulation and energy homeostasis, we predict that dark and pale melanic individuals adopt different behaviours to regulate their body temperature. Young animals are particularly sensitive to a decrease in ambient temperature because their physiological system is not yet mature and growth may be traded-off against thermoregulation. To reduce energy loss, offspring huddle during periods of cold weather. We investigated in nestling barn owls (Tyto alba) whether body temperature, oxygen consumption and huddling were associated with melanin-based coloration. Isolated owlets displaying more black feather spots had a lower body temperature and consumed more oxygen than those with fewer black spots. This suggests that highly melanic individuals display a different thermoregulation strategy. This interpretation is also supported by the finding that, at relatively low ambient temperature, owlets displaying more black spots huddled more rapidly and more often than those displaying fewer spots. Assuming that spot number is associated with the ability to thermoregulate not only in Swiss barn owls but also in other Tytonidae, our results could explain geographic variation in the degree of melanism. Indeed, in the northern hemisphere, barn owls and allies are less spotted polewards than close to the equator, and in the northern American continent, barn owls are also less spotted in colder regions. If melanic spots themselves helped thermoregulation, we would have expected the opposite results. We therefore suggest that some melanogenic genes pleiotropically regulate thermoregulatory processes.

Natur- eller teknikcentrerad miljösyn? : miljöattityder bland kommunala miljövårdstjänstemän 1994 och 2004

Abstract: Ecocentric or technocentric views? Attitudes among environmental civil servants 1994 och 2004

Reciprocal preening and food sharing in colour-polymorphic nestling barn owls.

Barn owl (Tyto alba) siblings preen and offer food items to one another, behaviours that can be considered prosocial because they benefit a conspecific by relieving distress or need. In experimental broods, we analysed whether such behaviours were reciprocated, preferentially exchanged between specific phenotypes, performed to avoid harassment and food theft or signals of hierarchy status. Three of the results are consistent with the hypothesis of direct reciprocity. First, food sharing was reciprocated in three-chick broods but not in pairs of siblings, that is when nestlings could choose a partner with whom to develop a reciprocating interaction. Second, a nestling was more likely to give a prey item to its sibling if the latter individual had preened the former. Third, siblings matched their investment in preening each other. Manipulation of age hierarchy showed that food stealing was directed towards older siblings but was not performed to compensate for a low level of cooperation received. Social behaviours were related to melanin-based coloration, suggesting that animals may signal their propensity to interact socially. The most prosocial phenotype (darker reddish) was also the phenotype that stole more food, and the effect of coloration on prosocial behaviour depended upon rank and sex, suggesting that colour-related prosociality is state dependent.