Biometric evaluation of the freshwater snail Pila globosa (Swainson, 1822) from the river Ganga in Bihar, India


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Biometric evaluation of freshwater Indian apple snail

Authors

  • S. K. Ahirwal ICAR-RCER
  • Kamal Sarma
  • Jaspreet singh
  • Tarkeshwar Kumar
  • Vivekanakand Bharti
  • Deva Narayan
  • Amrendra Kumar

https://doi.org/10.21077/ijf.2023.70.1.125224-03

Keywords:

Morphometry, length-weight relationship, condition factor, sex ratio, pila globossa,

Abstract

Length-frequency distribution, morphometry, length-weight relationship, relative condition factor and sex ratio of the apple
snail Pila globosa (Swainson, 1822) were studied from the river Ganga. A total of 922 specimens were collected during
July 2020 to June 2021, ranging from 3.53 to 62.99 g and from 16.49 to 59.78 mm (shell length). Length-frequency
distribution revealed that more than 50% of male and female specimens were within 35 to 45 mm in length and only few
(1.58%) female specimens were observed in the higher length (>55 mm). Females have significantly longer shells and are
heavier than males. Shell length has the strongest correlation with shell width (r=0.974) and the least with penultimate whorl
length (r=0.855). Length-weight relationship, indicated that the species has negative allometric growth (b<3). The relative
condition factor was 1.07 for males, 1.00 for females and 1.01 for pooled data. Sex ratio (M:F) statistically deviated from
the hypothetical ratio of 1:1, indicating a heterogeneous snail population (1:1.9, p<0.05).
Keywords: Ganga River, Growth pattern, Shell morphology, Snail Sex ratio

Author Biographies

  • Kamal Sarma

    ICAr-RCER, Patna

  • Jaspreet singh

    ICAR-RCER, Patna

  • Tarkeshwar Kumar

    ICAR-RCER, Patna

  • Vivekanakand Bharti

    ICAR-RCER, Patna

  • Deva Narayan

    ICAR-RCER, Patna

  • Amrendra Kumar

    ICAR-RCER, Patna

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Submitted

2022-06-27

Published

2023-03-31

Issue

Section

Articles

How to Cite

Ahirwal, S. K., Kamal Sarma, Jaspreet singh, Tarkeshwar Kumar, Vivekanakand Bharti, Deva Narayan, & Amrendra Kumar. (2023). Biometric evaluation of the freshwater snail Pila globosa (Swainson, 1822) from the river Ganga in Bihar, India: Biometric evaluation of freshwater Indian apple snail. Indian Journal of Fisheries, 70(1). https://doi.org/10.21077/ijf.2023.70.1.125224-03