Search results for "lapsenmurha"
showing 4 items of 4 documents
The Bruce effect revisited: is pregnancy termination in female rodents an adaptation to ensure breeding success after male turnover in low densities?
2017
Pregnancy termination after encountering a strange male, the Bruce effect, is regarded as a counterstrategy of female mammals towards anticipated infanticide. While confirmed in caged rodent pairs, no verification for the Bruce effect existed from experimental field populations of small rodents. We suggest that the effect may be adaptive for breeding rodent females only under specific conditions related to populations with cyclically fluctuating densities. We investigated the occurrence of delay in birth date after experimental turnover of the breeding male under different population composition in bank voles (Myodes glareolus) in large outdoor enclosures: one-male–multiple-females (n = 6 p…
Advantage of rare infanticide strategies in an invasion experiment of behavioural polymorphism
2012
Killing conspecific infants (infanticide) is among the most puzzling phenomena in nature. Stable polymorphism in such behaviour could be maintained by negative frequency-dependent selection (benefit of rare types). However, it is currently unknown whether there is genetic polymorphism in infanticidal behaviour or whether infanticide may have any fitness advantages when rare. Here we show genetic polymorphism in non-parental infanticide. Our novel invasion experiment confirms negative frequency-dependent selection in wild bank vole populations, where resource benefits allow an infanticidal strategy to invade a population of non-infanticidal individuals. The results show that infanticidal beh…
Crimes of desperation : Poverty-related filicides in 1810-1860
2017
Using Finnish upper court records as a source, this article is concerned with parental child homicides, newborn infanticides excluded, committed in Finland in the period 1810 to 1860. It focuses on the development in the rate and geographical distribution of these crimes, as well as the social and gendered distribution of the perpetrators. This information forms the basis for analyzing the connection between the motivation for the crime and the pauperization that culminated in these decades as a result of a rapid population growth, which manifested itself in an increase in the landless agrarian proletariat. Dire economic distress over subsistence was a motive for over a half of all filicide…
Lapsenmurhatapaukset aikansa kuvastajina : rahvaan ja esivaltojen toimintatavat ja ajatusmallit 1600-luvun jälkipuoliskon smoolantilaisessa paikallis…
2012
Tutkin Götan hovioikeuteen lähetettyjä lapsenmurhatapauksia Jönköpingin ja Kronobergin lääneistä aikavälillä 1648 – 1681. Työssä käytetyt alkuperäislähteet koostuvat Götan hovioikeuden tuomiokirjoista, joihin kuuluvat sekä hovioikeuden antamat päätökset että Jönköpingin ja Kronobergin kihlakunnanoikeuksien hovioikeudelle lähettämät puhtaaksi kirjoitetut eli renovoidut tuomiokirjat. Tutkimusajalla lapsenmurha määriteltiin naimattoman naisen suorittamaksi aviottoman lapsen murhaksi. Rikos yhdistettiin kiinteästi seksuaalisen kanssakäymisen kontrolloimiseen. Lapsenmurhan tuntomerkkeinä pidettiin sitä, että nainen oli laittoman sukupuolisuhteen lisäksi salannut raskautensa ja synnyttänyt salass…