Diversity and distribution of freshwater gastropods (Caenogastropoda) at selected area in Bintulu, Sarawak

Syed Azmai, Syarifah Hazirah (2018) Diversity and distribution of freshwater gastropods (Caenogastropoda) at selected area in Bintulu, Sarawak. [Project Paper]

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Abstract

Gastropoda communities are the most diverse class of mollusc and considered as important compenent in the freshwater ecosystems. Gastropods were found significantly important in the terms of ecology and economy. However, there were no clear information reported and lack of conservation effort and management of freshwater gastopods (Caenogastropoda) in Malaysia particularly in Sarawak. Therefore, this study was conducted to identify the species composition and to determine the diversity and abundance of freshwater gastropods communities from selected Bintulu freshwater systems. The environmental variables of water sample in the selected areas were also statistically analyzed. Present study discovered a total of 5 species from Pachychilidae and Thiaridae families were observed and identified. Snails were obtained by randomly placing a 1 m x 1 m quadrat at each location from five different stations in Bintulu, Sarawak. Melanoides tuberculata was the most abundance species indicated by its existence in almost every quadrat at each selected area. Shannon indices and Simpson's indices revealed the species diversity and richness were maximum at Station 3 compared to the other four study locations. Based on Bray-Curtis, two separate groups was formed at 40% similarities and supported by ordination of Principal Component Analysis. Jaccard similarity index showed that gastropods community from Station 4 and Station 5 were most similar. The value of environmental parameters indicates that there was a positive relation with the population of gastropods. The freshwater gastropods population showed a significant correlation (p<0.05) with the temperature, pH, turbidity, dissolved oxygen but no correlation with conductivity, chlorophyll a and TSS.

Item Type:	Project Paper
Subjects:	S Agriculture > SH Aquaculture. Fisheries. Angling
Faculty:	Faculty of Agriculture and Food Sciences
Depositing User:	Ms. Hairoon Juhaili
Date Deposited:	11 May 2026 01:05
Last Modified:	11 May 2026 01:05
URI:	http://psaspb.upm.edu.my/id/eprint/2723

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