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The investigation was conducted on morphometrics, length-weight relationship and ecological factors of the freshwater apple snail, Pila globosa (Swainson, 1822) in the habitat of Rajshahi University Campus. The length of shell (SL) (40.09 ± 16.08 mm), length of spire (SPL) (7.63 ± 2.61mm), length of base (LB) (32.52 ± 13.58 mm), width of shell (SW) (37.39 ± 15.72 mm), length of aperture (AL) (27.83 ± 10.42mm) and width of aperture (AW) (16.6 ± 6.46mm) in combined sex were observed. The obesity indices of male were higher than those of female (male =1.10 ± 0.03, female = 1.04 ±  0.01). The total weight in wet condition (TWW) (27.25 ± 25.25g) in combined sex was also recorded. The regression lines between SL/SPL (SL=1.2925+0.1580 SPL), SL/BL (SL = -1.2831 + 0.8432 BL), SL/SW (SL=1.7367+0.9760 SW), SL/AL (SL=1.9303+ 0.6460 AL), SL/AW (SL=0.5239+0.4011 AW), SL/TWW (SL= -3.4225+2.9290 TWW) and  SW/TWW (SW=3.1353+2.8060 TWW) in combined sexes were linear, positive and highly significant. Ecological factors from observed value (Ko) of combined sex and from calculated value (Kc) of combined sex were 29.53 ± 4.26 and 29.29 ± 0.95, respectively. Kn values of combined sex were found to be 1.009 ± 0.137 Bangladesh J. Sci. Ind. Res. 51(2), 121-128, 2016

bangladesh journal of scientific and industrial research

Morphometrics, length-weight relationship and ecological factors affecting the habitat of Pila globosa (Swainson, 1822) (Mesogastropoda: Pilidae) located in Rajshahi University campus