Adoptive feature of Bottom- Dwelling Fishes in the Tinav River

Abstract

The present study deals with the adaptive features of bottom-dwelling fishes Genus Garra of Tinau River using cast net and local fishing implement hammering. A total of 201 individuals of two species Garra annandalei (n=83) and Garra gotyla (n= 113) during September / October, 2023.The study focused on abundance, morphometric analysis, length-weight relationship, conditional factors, relationship of physicochemical parameters with fish and comparison collected sample with Central Department of Zoology, Tribhuvan, University (CDZ TU) museum deposited samples of Garra.. Garra annandalei has a length-weight relationship with b value 0.21, whereas Garra gotyla has b value: 0.38. The b value was fewer than 3, indicating that the species display negative allometric growth. The conditional factor was k = 0.50 for Garra annandalei and k = 0.60 for Garra gotyla, indicating that the species is in good condition. The most of the physicochemical characteristics were measured within acceptable ranges and relationship between fish abundance and physicochemical parameters also within good for fish’s survival. The paired sample t test revealed that there is significant different between means of two samples also x-ray examined difference between older and newly collected sample.