Diet composition of two common mole-rat populations in arid and mesic environments in South Africa as determined by stable isotope analysis

2016 ◽  
Vol 300 (4) ◽  
pp. 257-264 ◽  
Author(s):  
G. N. Robb ◽  
A. Harrison ◽  
S. Woodborne ◽  
N. C. Bennett
Keyword(s):  
South Africa ◽  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Diet Composition ◽  
Isotope Analysis ◽  
Mole Rat

Diet composition of Saunders's Gull (Larus saundersi) determined using stable isotope analysis at the Shuangtaihekou National Nature Reserve, China

2017 ◽  
Vol 37 (6) ◽  
Author(s):  
王玄 WANG Xuan ◽  
江红星 JIANG Hongxing ◽  
张亚楠 ZHANG Yanan ◽  
陈丽霞 CHEN Lixia ◽  
宋常站 SONG Changzhan ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Diet Composition ◽  
Nature Reserve ◽  
Isotope Analysis ◽  
National Nature Reserve

scholarly journals Stable Isotope Analysis of Ozark Hellbender (Cryptobranchus alleganiensis bishopi) Living and Preserved Museum Tissue Reveals a Shift in Their Generalist Diet Composition

Ecologies ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 187-202
Author(s):  
Waylon Hiler ◽  
Stanley E. Trauth ◽  
Benjamin Wheeler ◽  
Aimee Jimenez ◽  
Milica Radanovic ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Diet Composition ◽  
Isotope Analysis ◽  
Population Declines ◽  
Δ13c And Δ15n ◽  
Cryptobranchus Alleganiensis ◽  
N Isotopes ◽  
Generalist Diet ◽  
Stable Isotope Study

Ozark hellbenders (Cryptobranchus alleganiensis bishopi) have undergone marked population declines across their entire distribution. A variety of ecological life history research has been conducted to determine the cause(s) of the declines. Historically, hellbender diet studies used stomach content examination methods; however, alternative approaches such as less intrusive stable isotope analyses are now options for researchers. The goals of our study were to conduct stable isotope analysis on live and formalin-preserved museum specimen Ozark hellbender tissues to identify diet composition in the Eleven Point and Spring rivers, Arkansas. Also, we used stable isotope analysis to investigate if Spring River hellbender diets have changed over time. We sampled fish, live hellbenders (non-destructively), and formalin-preserved hellbender tissues from museum collections for stable isotope analysis. We sampled crayfish for assemblage composition and stable isotope analysis. The results of our stable isotope study revealed three main findings: (1) there were no statistically significant differences between hellbender δ13C and δ15N values among sites and hellbender stable C and N isotopes were correlated with body length; (2) traditional δ13C versus δ15N bi-plots and trophic discrimination values did not provide complete discernment in hellbender diets; however, Bayesian MixSIAR models revealed hellbenders to be generalists, and (3) the use of δ13C and δ15N values adjusted historic formalin-fixed and ethanol preserved hellbenders matched well with current crayfish and fish stable isotope values based on Bayesian MixSIAR models. These findings provide important diet information and a possible tool to examine dietary patterns from preserved specimens that may be used for hellbender conservation and management.

Sign in / Sign up

Export Citation Format

Share Document