Laying date and clutch size of Great Tits(Parus major) in the Mediterranean region: a comparison of four habitat types

摘要: Laying data and clutch size of Great Tits were studied in four different habitats eastern Spain: two holm oak(Quercus ilex) forests, at 500 900–950 m a.s.l., a zeen faginea) forest, 900–1100 pine(Pinus sylvestris) 1000–1050 orange(Citrus aurantium) plantations, 30 a.s.l. All sites placed about the same latitude (39–41°N), all during years (1992–95). Our results show that (1) laying date did not differ between natural altitude (range means yearly 4–8 May); (2) within habitat type (holm oak forest) was earlier low (30 Aprilvs. 8 (3) orange plantations (21 April) than habitats; (4) among altitude, decreased from (mean 7.3 eggs) to (7.0 pine forests (6.4 eggs), though only difference significant; (5) forest), tended be larger high (7.0vs. 5.9 eggs); (6) (7.7 significantly but forests. We discuss effect on Tits.