Ollyville P Lateau Salamander S Tatus R Eport
نویسنده
چکیده
In this report, we summarize the current status of the Jollyville Plateau salamander (Eurycea tonkawae) drawing upon data gathered from two different survey methods, count surveys and capture-mark-recapture (CMR) surveys. We examined short term trends in count data from 2008-2010 in the context of the 2008-2009 drought at thirteen monitoring sites, and long term trends at eight of those sites from 1996-2009. We also analyzed CMR data for three sites from 2007-2009 to estimate detection probability, population size, temporary emigration, and survival. Regarding overall status of the species, the analysis of long-term count data indicated that urban sites have a significant declining population trend overall, compared to rural sites. However, our ability to detect salamanders when they are present (detection probability) varies among sites and over time, and should be accounted for when interpreting count data. With respect to the response of E. tonkawae to the drought, we detected significantly lower total and juvenile salamander counts during 2008 through part of 2009, in comparison to post-drought counts. At CMR sites, population size did not significantly decrease during the longest dry period at each site, and reproduction was also observed at one site during this period. These results indicate a resiliency of E. tonkawae to dry surface conditions caused by drought.
منابع مشابه
Salamander S Tatus R Eport
In this report, we summarize the current status of the Jollyville Plateau salamander (Eurycea tonkawae) drawing upon data gathered from two different survey methods, count surveys and capture-mark-recapture (CMR) surveys. We examined short term trends in count data from 2008-2010 in the context of the 2008-2009 drought at thirteen monitoring sites, and long term trends at eight of those sites f...
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