caa a22 4500 469074604 CHVBK 20180323132931.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF00129704 doi (NATIONALLICENCE)springer-10.1007/BF00129704 Utilization of a habitat mosaic by cotton rats during a population decline [Elektronische Daten] [W. Lidicker Jr., J. Wolff, L. Lidicker, M. Smith] This study describes the demographic features of a population of Sigmodon hispidus utilizing the habitat mosaic provided by a Carolina Bay on the Atlantic coastal plain of South Carolina. A total of 71 cotton rats were captured 160 times on a 4 ha grid during a winter decline from 25/ha to less that 1/ha. Body weights of adults declined until early February and then increased; those of subadults grew very slowly until February followed by a spurt in growth. Weight gain did not differ between survivors and non-survivors for males, but female survivors gained 1.5 g per week more than non-survivors. Female subadults exhibited higher mortality early in the decline and males later. Adult females were randomly distributed across 8 microhabitats, whereas adult males were almost exclusively confined to heavy Rubus cover. Subadult males used wet sites more than any other cohort; subadult females were widely distributed using drier sites most frequently. By the end of the decline, all survivors were localized in Rubus-dominated patches. No statistically significant changes in electromorph genotypes or allele frequencies were detected, but survivors had a higher frequency of the F-allele at the adenylate kinase locus than did non-survivors (42.3% vs. 16.7%). Our findings affirm the importance of a landscape perspective in understanding the population dynamics of cotton rats, and show how a habitat mosaic influences survival differentially among sex-age cohorts. SPB Academic Publishing bv, 1992 Sigmodon hispidus habitat mosaic nationallicence sex-age cohorts nationallicence survivorship nationallicence density decline nationallicence landscape nationallicence population dynamics nationallicence electromorphs nationallicence Lidicker Jr. W. Museum of Vertebrate Zoology, University of California, 94720, Berkeley, CA, USA aut Wolff J. Savannah River Ecology Laboratory, University of Georgia, Drawer E., 29802, Aiken, S.C., USA aut Lidicker L. Museum of Vertebrate Zoology, University of California, 94720, Berkeley, CA, USA aut Smith M. Savannah River Ecology Laboratory, University of Georgia, Drawer E., 29802, Aiken, S.C., USA aut Landscape Ecology Kluwer Academic Publishers 6/4(1992-03-01), 259-268 0921-2973 6:4<259 1992 6 10980 https://doi.org/10.1007/BF00129704 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00129704 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lidicker Jr W. Museum of Vertebrate Zoology, University of California, 94720, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Wolff J. Savannah River Ecology Laboratory, University of Georgia, Drawer E., 29802, Aiken, S.C., USA aut NATIONALLICENCE 700 1- Lidicker L. Museum of Vertebrate Zoology, University of California, 94720, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Smith M. Savannah River Ecology Laboratory, University of Georgia, Drawer E., 29802, Aiken, S.C., USA aut NATIONALLICENCE 773 0- Landscape Ecology Kluwer Academic Publishers 6/4(1992-03-01), 259-268 0921-2973 6:4<259 1992 6 10980 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer