MORPHOMETRIC VARIATIONS ON APPLE SNAIL PILA GLOBOSA (SWAINSON, 1822) AT FORAGING SELECTED SITE OF ASIAN OPENBILL STORK ANASTOMUS OSCITANS IN SEMBANARKOIL REGION, NAGAPATTINAM DISTRICT, TAMILNADU, INDIA
Authors/Creators
- 1. PG and Research Department of Zoology, T.B.M.L College, Porayar, Tamilnadu
Description
The present study was conducted on Morphometric variations of Apple Snail Pila globosa (Swainson, 1822) at foraging selected site of Asian Openbill Stork Anastomus oscitans in Sembanarkoil region, Nagapattinam District, Tamilnadu, India from October 2016 to September 2017. The shell length (3.56 ± 1.05 cm), shell width (2.90 ± 0.93 cm), Aperture length (2.59 ± 0.89 cm), Aperture width (1.39 ± 0.50 cm) and Shell thickness (1.33±0.66 mm) were observed. The total weight in wet condition and (33.14±11.86g) and total weight in dry condition (13.08±4.90g) were also recorded. A Principal Components Analysis (PCA) was made in order to consider character inter- correlations. Considerable variation was found in morphometry amidst the habitat. The difference in mean shell length between the riverine habitat and agriculture habitat was highly significant. The length and weight relationship was found that allometric growth pattern in among the habitat while variation was found in agriculture habitat. The further study needed the morphometric study of P. globosa in relation to non-foraging site and size of prey chosen by Asian Openbill Stork.
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References
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