caa a22 4500 445857838 CHVBK 20180317145433.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10592-011-0223-z doi (NATIONALLICENCE)springer-10.1007/s10592-011-0223-z Low effective population size and survivorship in a grassland grouse [Elektronische Daten] [C. Pruett, J. Johnson, L. Larsson, D. Wolfe, M. Patten] Assessments of census size (N c) and effective population size (N e) are necessary for the conservation of species exhibiting population declines. We examined two populations (Oklahoma and New Mexico) of the lesser prairie-chicken (Tympanuchus pallidicinctus), a declining lek-breeding bird, in which one population (Oklahoma) has larger clutch size and more nesting attempts per year but lower survival caused by human changes to the landscape. We estimated demographic and genetic estimates of N e for each population and found that both populations have low N e estimates with a risk of inbreeding depression. Although Oklahoma females produce a larger number of offspring, the proportion of females successfully reproducing is not higher than in New Mexico. Higher reproductive effort has likely reached a physiological limit in Oklahoma prairie-chickens but has not led to a higher N e or even a larger N c than New Mexico. We propose that future conservation efforts focus on maximizing survivorship and decreasing the variance in reproductive success because these factors are more likely than increasing reproductive output alone to yield population persistence in lek-breeding species. Springer Science+Business Media B.V., 2011 Lek nationallicence Lesser prairie-chicken nationallicence Microsatellite loci nationallicence Mitochondrial DNA nationallicence Tympanuchus pallidicinctus nationallicence Pruett C. Sutton Avian Research Center, University of Oklahoma, Bartlesville, OK, USA aut Johnson J. Department of Biological Sciences and Institute of Applied Sciences, University of North Texas, Denton, TX, USA aut Larsson L. Sutton Avian Research Center, University of Oklahoma, Bartlesville, OK, USA aut Wolfe D. Sutton Avian Research Center, University of Oklahoma, Bartlesville, OK, USA aut Patten M. Sutton Avian Research Center, University of Oklahoma, Bartlesville, OK, USA aut Conservation Genetics Springer Netherlands 12/5(2011-10-01), 1205-1214 1566-0621 12:5<1205 2011 12 10592 https://doi.org/10.1007/s10592-011-0223-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10592-011-0223-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pruett C. Sutton Avian Research Center, University of Oklahoma, Bartlesville, OK, USA aut NATIONALLICENCE 700 1- Johnson J. Department of Biological Sciences and Institute of Applied Sciences, University of North Texas, Denton, TX, USA aut NATIONALLICENCE 700 1- Larsson L. Sutton Avian Research Center, University of Oklahoma, Bartlesville, OK, USA aut NATIONALLICENCE 700 1- Wolfe D. Sutton Avian Research Center, University of Oklahoma, Bartlesville, OK, USA aut NATIONALLICENCE 700 1- Patten M. Sutton Avian Research Center, University of Oklahoma, Bartlesville, OK, USA aut NATIONALLICENCE 773 0- Conservation Genetics Springer Netherlands 12/5(2011-10-01), 1205-1214 1566-0621 12:5<1205 2011 12 10592 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer