At April 2007 to April 2008, 692 crabs were collected from Sangla Kunchi Pwakal, Village Development Committee, Kathmandu, Nepal, to determine the gastro-somatic, feeding, and vacuity indices of the freshwater crab Barytelphusa lugubris. The crabs were weighed after being killed with chloroform. Crabs were dissected and the alimentary canal was weighed in its entirety. Finally, only the stomach contents were removed, weighed, and documented. The gastro- somatic (GSI), feeding (FI), and vacuity indices were studied on a seasonal and monthly basis. The minimum and maximum (GSI) were (2.29) in summer (September) and (3.70) in spring (April 08), respectively, with substantial changes (p-value = 3.36e-120.05) during a 13-month period. Similarly, the minimum and highest FI observed in the fall (November) and spring (July) were (4.52) and (24.85), respectively. Similarly, the minimum and maximum vacuity index (VI) in spring (April, 2008) and fall (89.29) were (11.11) and (89.29), respectively (November). The gastro-somatic and eating indices had mean coefficients of variance of 29.06 percent and 86.89 percent, respectively. This suggests that GSI has a larger table than FI.
Author (S) Details
Saroj Rana
Amrit Science Campus Lainchaur, Tribhuvan University, Kathmandu, Nepal.
View Book :- https://stm.bookpi.org/NVBS-V3/article/view/3935
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