19
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: not found
      • Article: not found

      Maternal stress alters the phenotype of the mother, her eggs and her offspring in a wild-caught lizard

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Related collections

          Most cited references78

          • Record: found
          • Abstract: not found
          • Article: not found

          RESTITUTION OF MASS–SIZE RESIDUALS: VALIDATING BODY CONDITION INDICES

            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Perceived predation risk reduces the number of offspring songbirds produce per year.

            Predator effects on prey demography have traditionally been ascribed solely to direct killing in studies of population ecology and wildlife management. Predators also affect the prey's perception of predation risk, but this has not been thought to meaningfully affect prey demography. We isolated the effects of perceived predation risk in a free-living population of song sparrows by actively eliminating direct predation and used playbacks of predator calls and sounds to manipulate perceived risk. We found that the perception of predation risk alone reduced the number of offspring produced per year by 40%. Our results suggest that the perception of predation risk is itself powerful enough to affect wildlife population dynamics, and should thus be given greater consideration in vertebrate conservation and management.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Collecting baseline corticosterone samples in the field: is under 3 min good enough?

              Evaluating corticosterone (CORT) responses to stress in free-living vertebrates requires knowing the unstressed titers prior to capture. Based upon laboratory data, the assumption has been that samples collected in less than 3 min of capture will reflect these unstressed concentrations. This assumption was tested for six species using samples collected from 945 individuals at 0-6 min after capture. Samples were from five avian species trapped at multiple times of year and one reptilian species, comprising a total of 14 different data sets for comparisons. For seven of 14 data sets, including five species, there was no significant increase in corticosterone titers within 3 min of capture. In six of the 14 data sets, corticosterone titers increased significantly after 2 min, and in one data set, the increase started at 1.5 min. In all seven of the cases showing an increase before 3 min, however, corticosterone titers from the time of increase to 3 min were significantly lower than titers after 30 min of restraint stress. These results indicate a high degree of confidence for these species that samples collected in less than 2 min reflect unstressed (baseline) concentrations, and that samples collected from 2-3 min also will likely reflect baseline concentrations but at worst are near baseline.
                Bookmark

                Author and article information

                Journal
                Journal of Animal Ecology
                J Anim Ecol
                Wiley
                00218790
                November 2018
                November 2018
                August 30 2018
                : 87
                : 6
                : 1685-1697
                Affiliations
                [1 ]Department of Ecosystem Science and Management; Pennsylvania State University; University Park Pennsylvania
                [2 ]Department of Biology; Mueller Laboratory; Pennsylvania State University; University Park Pennsylvania
                [3 ]Intercollege Graduate Degree Program in Ecology; Pennsylvania State University; University Park Pennsylvania
                Article
                10.1111/1365-2656.12891
                30074248
                fc7b0bfa-87cf-4f7b-a1e0-f5a98e057e89
                © 2018

                http://doi.wiley.com/10.1002/tdm_license_1.1

                http://onlinelibrary.wiley.com/termsAndConditions#am

                http://onlinelibrary.wiley.com/termsAndConditions#vor

                History

                Comments

                Comment on this article