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The autumn diet of the edible dormouse Glis glis Linnaeus, 1776 in northwest Spain was investigated on the basis of analysis of the stomach contents of 32 indi­viduals captured in September and October of 1985 and 1986. Remains of Quercus robur acorns and Corylus auellana hazelnuts accounted for 86.5% of the total dry weight of the 32 samples, while blackberry remains accounted for 10.2%. Remains of vegetative plant structures (leaves, etc) accounted for only 3.3% of total dry weight. Insect remains were frequently present, but in very small amounts (about 0.01% of total dry weight). Dormouse hairs and ectoparasites were also frequently present, presumably as a result of accidental ingestion during grooming.
Alnus pollen is an early component of the annual atmospheric aerosol of the north-west regions of Spain, which causes the first occurrence of allergic symptoms. Seasonal and intra-daily variation of Alnus pollination, and the influence that main meteorological parameters exert, was studied in this paper. Monitoring was carried out from 1993-2002, by using two Lanzoni VPPS 2000 volumetric samplers. Once the atmospheric behaviour of this pollen had been identified, the final objective was to elaborate predictive models to determine the onset of the Alnus pollen season and its concentrations during the pollination period in two localities of north-west Spain (Santiago and Ourense). Winter chilling required to overcome the bud-dormancy period was similar in both cities, with around 800 Chilling Hours (C.H.) and 5.5oC threshold temperature. Calculation of heat requirement for bud growth was carried out with maximum temperature, with around 50 Growth Degree Days (G.D.D.oC) needed, with 6oC threshold temperature. Data from 2002 were used in order to determine the real validity of the models. This year was not taken into account to establish the aforementioned models. The variation between the predicted start of the pollen season and the observed season was smallest in Ourense. Verifying the proposed models for predicting daily mean concentrations of Alnus pollen during the pollen season shows that the predicted curves fits the observed variations of daily mean concentrations.
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