Morphometry and Length/Width-Weight Relationship of Psuedosesarma glabrum Inhabiting Tropical Mangroves, South-West Coast of India

Abstract

In this study, the inter-relationship of width/weight-length by sex of Psuedosesarma glabrum population living in tropical mangrove ecosystem, South-West coast of India was examined. A total of 290 Samples coimprising 162 males and 128 females were examined during the period June 2019-November 2020. Morphometric characters viz., carapace width (CW), carapace length (CL), frontal width (FW), sternum width (SW), abdomen width (AW), propodus length (PL), dactylus length (DL) and body weight (BW) were measured for each animal. Linear regression analysis was used to study the interrelationship between various morphometric characters and Analysis of Covariance (ANCOVA) was performed to test the difference between male and female. In this study, sample collected include the carapace size group of 10-15 mm with a mean value of 13.65±1.68 in males and 11-15 mm with a mean value of 13.16±1.61 in females during the sampling period. All the set of characters showed a positive significant correlation except propodus length in P. glabrum (P < 0.05). Correlation value between carapace width and propodus length (PL) are, r = 0.834 in males and r = 0.768 in females and the Coefficient of detrmination with carapace length (CL) are, r = 0.816 in males and r = 0.779 in females respectively. Student's-t test for length / widthweight relationship established allometric growth pattern in this species.