Vol. 11, Issue 11 (2022)

Author(s):
Asifa Wali, Tasaduq H Shah, FA Bhat, Adnan Abubakr, Bilal Ahmad Bhat, Tariq Ahmad Bhat, Ishrat Mohd and Ifra Rashid

Abstract:
The study includes the collection of 200 samples of O. mykiss from the national trout fish farm Kokernag, Jammu and Kashmir to analyze gut metrics of the alimentary canal of fish from fry to brood size stages. A significant correlation was also seen between the total length with gastro somatic index, hepatosomatic index, relative gut mass and zihlers index (r = 0.339, p<0.05, r=0.334, p<0.05, r = 0.330, p<0.05 and r = 0.316, p<0.05) in fry stage. Relative gut mass reflected a strong correlation with hepatosomatic (r = 0.815, p<0.01) and showed a weaker negative relationship with that of Zihler’s index (r = -0.08) in fingerling stage. Correlations of gut morphometric parameters in yearling stage of O. mykiss showed total length is highly correlated with standard length (r = 0.903, p<0.01) followed by weight (r = 0.868, p<0.01), gut length (r = 0.672, p<0.01), liver weight (r = 0.647, p<0.01), intestinal length (r = 0.646, p<0.01) and gut weight (r = 0.379, p<0.01). The Pearson’s relation for gut morphometric parameters in table size stage showed total length has higher significant relation with standard length (r = 0.970, p<0.01) followed by weight (r = 0.853, p<0.01), gut weight (r= 0.727, p<0.01) and a significant relation of total length with liver weight was observed (r = 0.362, p<0.05). Relative length of gut in broods has a strong connection with Zihler’s index (r = 0.859, p<0.01) and is highly significant followed by intestinal coefficient (r = 0.477, <0.01), gastrosoamtic index (r = 0.493, p<0.01) and relative length of gut showed negative relation with hepatosomatic index. The intestinal coefficient in brood stage has a highly significant relation with Zihler’s index (r= 0.700, p<0.01)