TY - GEN T1 - Population demography of northern spotted owls T2 - Studies in avian biology ; A2 - Forsman, Eric D. LA - English PP - Berkeley PB - University of California Press YR - 2011 UL - https://ebooks.jgu.edu.in/Record/jstor_eba_ocn747428357 AB - "The Northern Spotted Owl, a threatened species that occurs in coniferous forests in the western United States, has become a well-known environmental symbol. But how is the owl actually faring? This book contains the results of a long-term effort by a large group of leading researchers to document population trends of the Northern Spotted Owl. The study was conducted on 11 areas in the Pacific Northwest from 1985 to 2008, and its objectives were both to evaluate population trends and to assess relationships between reproductive rates and recruitment of owls and covariates such as weather, habitat, and the invasion of a closely related species, the Barred Owl. Among other findings, the study shows that fecundity was declining in five populations, stable in three, and increasing in three areas. Annual apparent survival rates of adults were declining in 10 out of 11 areas. This broad, synthetic work provides the most complete and up-to-date picture of the population status of this inconspicuous forest owl, which is at the center of the complex and often volatile debate regarding the management of forest lands in the western United States."--Provided by publisher. OP - 106 CN - QL696.S83 P665 2011eb SN - 9780520950597 SN - 0520950593 SN - 1283278626 SN - 9781283278621 SN - 9786613278623 SN - 6613278629 SN - 9780520270084 SN - 0520270088 KW - Northern spotted owl. KW - Bird populations. KW - Chouette tacheteĢe du Nord. KW - Oiseaux : Populations. KW - NATURE : Animals : Birds. KW - NATURE : Birdwatching Guides. KW - SCIENCE : Life Sciences : Zoology : Ornithology. KW - Bird populations KW - Northern spotted owl ER -