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Scanning Electron Microscopy of Adhesive Apparatus of Garra lissorhynchus (McClelland) of Meghalaya, India

Author Affiliations

  • 1Department of Zoology, St. Anthony’s College, Shillong-793001, Meghalaya, INDIA

Int. Res. J. Biological Sci., Volume 4, Issue (2), Pages 48-53, February,10 (2015)

Abstract

Garra lissorhynchus(McClelland) also known as the “Khasi Garra” is a species of ray finned fish in the genus Garra. The species is commonly found inhabiting the torrential rivers in the Khasi Hills Districts of the state of Meghalaya in India, and thus the name “Khasi Garra”. The adhesive organ of this species was studied with the help of Scanning Electron Microscopy (SEM). The study revealed that the mouth of the fish is guarded with upper fringed labial fold or lip and lower lip that has been modified into the main adhesive organ or disc. The adhesive disc consists of crescent callous pad, modified labial fold and posterior free margin. Many tubercles bearing curved spines were observed on the lips and labial folds whereas, numerous mucous openings were observed on the callous pad. The study suggested that spines and mucous together help the fish attach firmly to substratum under strong water currents.

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