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Assessing Essential Trace Elements in Cave Nectar Bat (Eonycteris spelaea): A Study in Barak Valley of Assam, India

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Abstract

This study investigated trace elements in the different organs of Eonycteris spelaea, a hill cave from the Bhuban Hills of Sonai Reserve Forest, Cachar, Assam (India). Six bats were collected from the site and concentrations of four trace elements (Cu, Zn, Fe, and Mn) were examined from the tissues of liver, lungs, kidney, and patagium using graphite furnace atomic absorption spectrometer (graphite furnace model—Analytic Jena Vario-6). The results of the study revealed that concentration of essential trace elements in the body tissues of E. spelaea were less than the maximum permissible limit. During the study, it was found that the concentration of copper in all the four organs are of the following order: liver (3 ± 0.11 μg/g dw) > lungs (2.4 ± 0.14 μg/g dw) > kidney (1.8 ± 0.10 μg/g dw) > patagium (1.8 ± 0.06 μg/g dw). For zinc, this sequence was kidney (61.8 ± 0.32 μg/g dw) > liver (61.2 ± 0.14 μg/g dw) > lungs (58.8 ± 0.19 μg/g dw) > patagium (46.8 ± 0.16 μg/g dw). For manganese, kidney (1.2 ± 0.15 μg/g dw) > lungs (0.6 ± 0.13 μg/g dw) > liver (0.6 ± 0.11 μg/g dw) > patagium (0.6 ± 0.10 μg/g), and for iron, it was liver (98.4 ± 0.22 μg/g) > lungs (78.6 ± 0.47 μg/g dw) > kidney (25.8 ± 0.23 μg/g dw) > patagium (16.2 ± 0.26 μg/g dw). Analysis of variance revealed significant differences (d.f. = 15, F = 44.84, P < 0.01) in the accumulation pattern in all the studied tissues of Eonycteris spelaea.

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  1. Wildlife Research and Conservation Laboratory, Department of Ecology and Environmental Science, Assam University, Silchar, Assam, 788011, India

    Anisur Rahman, Parthankar Choudhury & Nazimur Rahman Talukdar

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Highlight:

• Essential trace metals accumulation varied among different tissues of the Eonycteris spelaea.

• Cu, Zn, Fe, and Mn were found bellow permissible level in the body of Eonycteris spelaea in the Barak valley indicating forested areas are still less affected by anthropogenic pollution.

• Accumulation of zinc was highest in the kidney and patagium than in the liver and lungs whereas iron was more in the liver and lungs than in the patagium and kidney.

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Rahman, A., Choudhury, P. & Talukdar, N.R. Assessing Essential Trace Elements in Cave Nectar Bat (Eonycteris spelaea): A Study in Barak Valley of Assam, India. Biol Trace Elem Res 188, 451–460 (2019). https://doi.org/10.1007/s12011-018-1431-x

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