Full cirkel : Finska Gardets befäl 1829 och 1906

Åke Backström

Feuerstern : rättelser och tillägg till Carpelans Ättartavlor

Selostus: Feuerstern

Vad innebär det att lära sig och förstå ett andra språks grammatik?

Summary: What does it mean to learn and understand the grammar of a second language?

Officerare och civilmilitärer vid 6., Tavastehus, indelta finska skarpskyttebataljon 1854-1868

Selostus: Upseerit ja sotilasvirkamiehet 6. suomalaisessa eli Hämeen tarkkampujapataljoonassa 1854-1868

Melanin-based coloration covaries with ovary size in an age-specific manner in the barn owl.

While the adaptive function of black eumelanin-based coloration is relatively well known, the function of reddish-brown pheomelanin-based coloration is still unclear. Only a few studies have shown or suggested that the degree of reddish-brownness is associated with predator-prey relationships, reproductive parameters, growth rate and immunity. To gain insight into the physiological correlates of melanin-based coloration, I collected barn owl (Tyto alba) cadavers and examined the covariation between this colour trait and ovary size, an organ that increases in size before reproduction. A relationship is expected because melanin-based coloration often co-varies with sexual activity. The results showed that reddish-brown juveniles had larger ovaries than whiter juveniles particularly in individuals in poor condition and outside the breeding season, while in birds older than 2 years lightly coloured females had larger ovaries than reddish-brown conspecifics. As barn owls become less reddish-brown between the first and second year of age, the present study suggests that reddish-brown pheomelanic and whitish colorations are associated with juvenile- and adult-specific adaptations, respectively.

Garvarmästare Savón och hans familj

Selostus : Nahkurimestari Savón ja hänen perheensä

Isolation and characterization of major histocompatibility complex (MHC) class II B genes in the Barn owl (Aves: Tyto alba)

We isolated major histocompatibility complex class II B (MHCIIB) genes in the Barn owl (Tyto alba). A PCR-based approach combined with primer walking on genomic and complementary DNA as well as Southern blot analyses revealed the presence of two MHCIIB genes, both being expressed in spleen, liver, and blood. Characteristic structural features of MHCIIB genes as well as their expression and high non-synonymous substitution rates in the region involved in antigen binding suggest that both genes are functional. MHC organization in the Barn owl is simple compared to passerine species that show multiple duplications, and resembles the minimal essential MHC of chicken.

Balansbolagstransaktioner och skattebrott

Festskrift till Per Lindholm