Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 01 Aug 2002

Activity Patterns of Red Hills Salamanders (Phaeognathus hubrichti) at Their Burrow Entrances

Page Range: 851 – 856
DOI: 10.1643/0045-8511(2002)002[0851:APORHS]2.0.CO;2
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Abstract

The Red Hills salamander (Phaeognathus hubrichti), a large fossorial plethodontid endemic to south-central Alabama, was listed as federally threatened in 1976. To determine the seasonal and daily activity patterns of this species, I counted the number of salamanders present at burrow entrances, recorded the amount of time individual salamanders spent at entrances, and measured five abiotic variables to determine how they correlated with the number of salamanders at burrow entrances. Red Hills salamanders were present at burrow entrances all months of the year, displayed a unimodal daily activity pattern, and spent a mean of 12.3 continuous hours at an entrance each day. Regardless of season, time spent at an entrance remained relatively constant. Air temperature had the highest correlation with the number of salamanders present at entrances. Burrow entrances play a prominent role in the lives of these salamanders. When estimating population size for conservation efforts, surveys should be conducted at night and at multiple times and dates during the warmer months of the year because not all salamanders are present at entrances at any one time.

Copyright: The American Society of Ichthyologists and Herpetologists
 Fig. 1. 
 Fig. 1. 

Percent burrow occupancy (closed circles, bold line), relative humidity (RH; closed squares, thin line), and temperature (open squares, dashed line) of burrows at Haines Island Park during 1999. Date is in month/day format. Occupancy on 18 June does not include four individuals returned to the site from captivity


 Fig. 2. 
 Fig. 2. 

Daily activity pattern of Red Hills salamanders at Haines Island Park. Ordinate measures the mean proportion of time during an hour that a salamander was present at its entrance


 Fig. 3. 
 Fig. 3. 

Number of hours of activity of Red Hills salamanders at Haines Island Park. Each date represents a videotaped salamander. Date is in month/day format


Received: 17 Jan 2001
Accepted: 18 Mar 2002
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