Density, Morphology and Egg Clusters of Pila scutata Snails at Rice Fields Area in Peringsari Village, Bali
Pila scutata is a species belonging to the Ampullariidae family. One of the habitats of the snail is rice fields. Snails are used as an alternative protein source in Bali. The focus of this research was to determine the snail density, morphology, morphometry, and egg clusters in rice fields in the Selat District of the Karangasem Regency in Bali. Snails were collected in the morning by erecting a 1m x 1m quadrat in each corner of the rice field. Snails ranging in size from small to large were collected in the quadrats, on the surface of the water, in the water, and attached to aquatic plants. Snail egg clusters were discovered while exploring the rice fields where snail samples were collected. Sampling was repeated three times. Snail and egg cluster samples were brought to the lab for examination. The density, frequency of presence, distribution pattern, morphology, and morphometry of the snails were all calculated. The number of eggs in one egg cluster was determined by separating each egg from the egg cluster. According to the findings, the snail density was 3.75 individuals/m2, the presence frequency was absolute, and the distribution pattern was regular. The shell height was 17.02-31.09 mm, and the snails had a subglobose shape with brown transverse band. A single egg cluster could contain 29-67 eggs.
Keywords: mollusk, ampullariidae, apple snails, Pila
 Sri-aroon, P. & Richter, K. 2012. Pila scutata. The IUCN Red List of Threatened Species 2012: e.T184853A1757771. http://dx.doi.org/10.2305/IUCN.UK.2012- 1.RLTS.T184853A1757771.en
 Ng TH, Tan SK, Low MEY. Singapore mollusca: The family Truncatellidae (Gastropoda: Caenogastropoda: Truncatelloidea). Nature in Singapore. 2014;7(Mar):31–47.
 Maldonado MA, Martín PR. Dealing with a hyper-successful neighbor: Effects of the invasive apple snail Pomacea canaliculata on exotic and native snails in South America. Current Zoology. 2019;65(3):225–235. https://doi.org/10.1093/cz/zoy060
 Marwoto RM, Isnaningsih NR. Tinjauan keanekaragaman moluska air tawar di beberapa situ di DAS Ciliwung – Cisadane. Berita Biologi. 2014;13(2):181–189.
 Chaichana R, Sumpan T. The potential ecological impact of the exotic snail Pomacea canaliculata on the Thai native snail Pila scutata. ScienceAsia. 2014;40(1):11–15. https://doi.org/10.2306/scienceasia1513-1874.2014.40.011
 Suartini NM, Sudatri NW. Diversitas gastropoda pada habitat persawahan dengan ketinggian berbeda. Metamorfosa: Journal of Biological Science. 2019;6(2):217–223. https://doi.org/10.24843/metamorfosa.v.o6.IO2.p11
 Suartini NM, Sudatri NW. Variasi jenis gastropoda air tawar pada berbagai macam habitat di Kecamatan Selat, Kabupaten Karangasem-Bali. Laporan Penelitan: Univesitas Udayana.2017.
 Ramakrishna S, Alexander R, Deepak P, Jayashankar M. Intraspecific variation in shell morphometry of Bellamya dissimilis (Mueller, 1774) (Architaenioglossa: Viviparidae) from three different lakes of Bangalore urban district. International Journal of Pharmacy and Life Science 2014;5(5):3540–3545.
 Krebs CJ. Ecology. The experimental analysis of distribution and abundance. 2nd ed. New York: Harper and Row Publishing; 1978.
 Suartini NM. Sebaran dan kepadatan populasi keong emas (Pomacea canaliculata) di Bali dan potensinya sebagai pakan larva kumbang Tenebrio molitor [Thesis]. Universitas Udayana; Unpublised. 2021.
 Ubaidillah R, Marwoto RM, Hadiaty RK dkk. Biota perairan terancam punah di Indonesia. Indonesia: Direktorat Konservasi Kawasan dan Jenis Ikan Ditjen Kelautan, Pesisir, dan Pulau – Pulau Kecil Kementerian Kelautan dan Perikanan Bekerjasama dengan Lembaga Ilmu Pengetahuan Indonesia; 2013.
 Tan SK, Lee Y-L, Ng TH. The status of the apple snail, Pila scutata (Gastropoda: Ampullariidae) in Singapore. Nature in Singapore. 2013;6( Jun):135–141.
 Marwoto RM, Heryanto H, Joshi RC. The invasive apple snail Pomacea canaliculata in Indonesia: A case study in Lake Rawa Pening, Central Java. BIO Web Conference. 2020;19:1-5 https://doi.org/10.1051/bioconf/20201900014
 Teo SS. Biology of the golden apple snail, Pomacea canaliculata (Lamarck, 1822), with emphasis on responses to certain environmental conditions in Sabah, Malaysia. Molluscan Research. 2004;24:139–148. https://doi.org/10.1071/MR04009