Reconstruction of human ecosystems and their stability over time provides knowledge of the processes of adaptability developed by isolated communities. Seasonality of vital events is a good indicator of the effects of different lifestyles, which in turn depend on the ecological context in which a population developed specific subsistence models. Seasonality of births reflects the cultural attitude towards the best time to conceive, in relation to work activities and loads; the latter may also affect physiological functions related to fertility. The (...) present research concerns gross birth rates and seasonality of births and conceptions during four centuries in south-central Italy. Birth rates were between 33·0 and 36·5 per 1000. The pattern of seasonality of births and, by extension, of conceptions defines a southern-type agricultural area for the earlier periods. However, it also shows a progressive shift towards an increasing concentration of conceptions in spring namely from April to August – with a large increase in summer in the 19th century with respect to the previous periods. The new 19th century pattern is reported by Crisafulli, Dalla Zuanna & Solero (2000) as being representative of the central Adriatic region, a geographical classification to which Abruzzo can also be attributed. (shrink)

This study investigates seasonality of marriages and reproductive isolation in six long-isolated communities in the central Apennines (Italy). It had two objectives: (1) the identification of an Apennine biodemographic model in comparison with mountain communities of other regions, and with non-Apennine communities in Abruzzo, and (2) to identify the possible effects of the drainage of Lake Fucino (1854 shows that there was a delayed, limited period of increased consanguinity in the few decades around the turn of the century. This is (...) different from the national situation, and thus could be a consequence of the Lake Fucino drainage. (shrink)