Microanalysis of the adaptive apparatus using scanning electron microscopy (Sem) in Garra paralissorhynchus, vishwanath & shanta, 2005 (Teleostei: cyprinidae) from chindwin drainage of Manipur

Abstract

The architectural structure of labrum and pulvinus of the gular disc in Garra paralissorhynchus are illustrated in this study to determine its adaptive relationship with its torrential habitat. SEM results highlighted that the papillae present on its labrum are closely packed. Each is arranged in a rosette pattern and devoid of spines with hook-like tips. It can be inferred from this, that its role is to control the pressure gradient while the fish is anchored to the substratum with the suction mechanism of the pulvinus. On the other hand, pulvinus is rich in mucus pores and sensory cells. Thus, preventing the fish from mechanical abrasions aside from adhesion.