出版社：Výzkumný Ústav Lesního Hospodárství a Myslivosti
摘要：Data for the spruce bark beetle Ips typographus (2942 measurements concerning number of eggs deposited per gallery, length of maternal galleries, and density of family galleries) were collected from 122 trap trees and 398 bark samples in three regions in 2008–2009. The mean maternal gallery was 78 mm long and the established mean egg-laying by one female was 35 eggs. The number of family galleries per m² of trunk ranged from 6 to 330 and was negatively correlated with the number of eggs deposited per gallery. The length of the maternal gallery was positively correlated with the number of deposited eggs. Because the number of family galleries per m² was not correlated with the length of the maternal galleries, the relationships were described by the following multidimensional linear regression: y = 15.45 + 0.29* x1 – 0.02* x2, where x1 = gallery length, x2 = number of family galleries per m² and y = number of eggs deposited per female.
