Jurnal Moluska Indonesia

Front Matter

2025-10-01T09:24:06+00:00

Front Matter

Community Structure of Gastropods in Mangrove Ecosystem in Tanjung Pasir Village, Teluknaga, Tangerang District

2025-04-22T01:41:31+00:00

The waters of the dune mangrove harbor a diversity of gastropods that play a vital ecological role. Gastropods are often used as a water bioindicator because of their ability to continue to respond to changes in the water. This study has the purpose of identifying types and analyzing the mollusk community (gastropods) and analyzing the relationship-chemical parameters of the mollusk community. As for the research method used is purposive sampling, the sample take takes place at two stages, namely the gastropod parameters and gastropod samples being taken. The results of the three observation stations in the mangrove cape of the sand yielded 5 species of gastropods and 4 genus. Gastropods spread patterns tend to be uniform and some clustered. The dietal index (h ') of variety (1.03), in turn, the equilibrium (e) group of gastropods tends to be balanced by value (0.64) and then on a non-commissioned (c) index (0.95). Water quality parameters indicate good water conditions. Thus, the entire structure of gastropods communities in the mangrove waters tended to be stable.

The Distribution and Abundance of Gastropods and Bivalves on The Coast of Kecinan, Pemenang, North Lombok

2025-04-22T01:38:02+00:00

Gastropods and Bivalves are important organisms to study in terms of community because they can serve as indicators of environmental quality due to their sedentary nature. This research was conducted in April 2024 at Kecinan Beach, Malaka, Pemenang District, North Lombok Regency, with the aim of identifying species and analyzing the distribution patterns and abudance of Gastropods and Bivalves in the intertidal zone. Sampling was conducted using the quadrat transect method in three observation areas, each divided based on different activities. In each area, a 50 meter transect was laid out toward the sea with 1 x 1 meter quadrats placed every 5 meters. Data were analyzed to obtain values for abundance, diversity index, dominance index, morisita index and evenness index. The results identified 131 species with 338 individuals, consisting of 107 species of Gastropods and 24 species of Bivalves. Stations I and II, which have good seagrass and coral reef ecosystems, showed a higher number of individuals compared to station III, which is located near a river mouth. The diversity index at stations II and I was classified as high, while station III had a moderate index. The evenness index at all stations showed a stable distribution pattern. The low dominance index indicated that no species dominated the area.

Mollusk Community (Gastropods and Bivalves) in Suli Coastal Waters, Central Maluku, Indonesia

2025-08-14T01:42:59+00:00

Gastropods and bivalves are benthic organisms from molluscs’ phylum. These organisms play an important role in aquatic ecosystems such as grazer, detritus feeder, predator. Some species have economic important value. Suli coastal water has higher diversity of marine molluscs, which is used by local community as protein sources besides fishes. This resource faces threats due to utilization activities by the community during the low tide period. The objectives of this research are to analyze community structure of this mollusc including species composition, ecological density, potency, frequency of occurrence, ecological index of communities, as well as to analyze the distribution pattern of this marine mollusc. This study was conducted in December 2023 in the intertidal zone of Suli coastal watesr with applying transect line methods during the day at low tide period. The total of 719 individual marine gastropods collected in this study area consisted of five orders, 19 family, 36 genera and 50 species. The highest ecological density and potency of gastropods belong to Monetaria annulus and Rochia nilotica. In other hand, as much as 147 individuals of bivalves found in this area, which is included in six order, 10 family, 16 genera dan 20 species. Anadara antiquata, and Balbatia decusatta have the higher ecological density and potency, while Trachicardium subrugossum, Anadara antiquata, and Dosinia contracta have the higher frequency of occurence. The diversity of gastropod and bivalve in this study area is in medium category, evenness index is high category and lowest dominance index. Marine gastropods and bivalves showed the clumped distribution pattern.

The Influence of Environmental Factors and Human Activities on Land Snail Diversity in the Sumber Brantas Arboretum and IPB Bogor Campus)

2023-06-11T10:37:48+00:00

This study aims to analyze the composition of terrestrial gastropods in two arboreta with different environmental characteristics. Sampling was conducted purposively using hand sampling methods. Environmental factors such as elevation, temperature, and light intensity were measured at each sampling plot. Additionally, shell morphology of the collected gastropods was analyzed. The results revealed differences in gastropod composition between the two arboreta, with Sumber Brantas Arboretum exhibiting a higher Shannon diversity index (0.97) compared to IPB University Arboretum (0.73). Parmarion sp. was the only species found in both locations. These differences in gastropod composition are likely influenced by significant variations in elevation and land-use patterns between the arboreta. The findings highlight the important role of environmental factors and land use in shaping terrestrial gastropod diversity, which can serve as bioindicators of ecosystem quality.

Diversity of Mollusks in The Intertidal Zone at Bahowo Beach, Manado, North Sulawesi

2025-07-28T07:12:39+00:00

The intertidal zone is a crucial habitat for various marine organisms, including Mollusca. Mollusca serve as bioindicators for assessing water quality. However, data on mollusc diversity in the coastal area of Bahowo Beach is still limited. Therefore, this study aimed to improve the knowledge of Mollusca diversity in this region. Molluscs were collected using 1×1 m plots placed randomly along vertical stratification. The samples were preserved in 70% alcohol and transported to the laboratory for identification using an identification guidebook. The assigned Mollusca were then analysed using Paleontological Statistics (PAST) software. The study recorded 79 individuals representing 41 species from two classes: Gastropoda and Bivalvia. The order Neogastropoda was the most dominant, with 22 species. The most abundant species was Littoraria scabra, with 16 individuals. The diversity index (H' = 3.209) falls into the high category, indicating that the Bahowo Beach ecosystem remains in good condition and continues to support mollusc life.

Zona pasang surut merupakan habitat penting bagi berbagai biota laut, termasuk Mollusca. Mollusca berperan sebagai bioindikator untuk menilai kualitas lingkungan perairan tersebut. Data mengenai keanekaragaman Mollusca di wilayah pesisir Pantai Bahowo masih terbatas, sehingga dilakukanlah penelitian ini untuk menambah informasi mengenai keanekaragaman jenis Mollusca. Pengambilan Mollusca dilakukan dengan menggunakan plot 1×1 m secara acak, sampel yang diperoleh dimasukkan ke dalam plastik berisi alkohol 70% kemudian dibawa ke laboratorium untuk diidentifikasi menggunakan buku identifikasi. Mollusca yang telah diidentifikasi akan dianalisis menggunakan perangkat lunak Paleontological Statistics (PAST). Hasil Penelitian ini ditemukan 79 individu dari 41 spesies dari 2 kelas yaitu Gastropoda dan Bivalvia, dengan dominasi ordo Neogastropoda (22 spesies). Spesies terbanyak adalah Littoraria scabra (16 individu). Indeks keanekaragaman (H' = 3.209) menunjukkan kategori tinggi, yang menandakan ekosistem Pantai Bahowo masih dalam kondisi baik dan mendukung kehidupan Mollusca.

Back Matter

2025-10-01T09:24:50+00:00

Back Matter