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INDONESIA
Indonesian Journal of Mollusk
Published by Indonesian Mollusk Society
ISSN : 27767507     EISSN : 20878532     DOI : https://doi.org/10.54115/
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science
The Indonesian Journal of mollusk is dedicated to publishing high quality research papers and reviews in all aspects of molluscs including ecology, conservation, biodiversity, aquaculture, microbiology and biotechnology. The Mollusk Journal is published 2 (two) times a year, namely April and October.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ecology, Evolution, Behavior and Systematics
Articles 70 Documents
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Screening for Antibacterial and Antifungal Activity in Fungi Associated with Molluscs Lumban Gaol, Josua Gabriel; Pringgenies, Delianis; Ari Setyati , Wilis
Jurnal Moluska Indonesia Vol. 9 No. 1 (2025): April 2025
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v9i1.114

Abstract

Molluscs are invertebrate organisms that produce secondary metabolites to adapt to their environment. These secondary metabolites are also found in fungi that live in symbiosis with molluscs. Research has shown that these symbiotic fungi produce various secondary metabolites with antibacterial and antifungal properties. This study aims to explore the potential of fungi associated with molluscs in developing bioprospecting strategies against pathogenic bacteria and fungi. The antibacterial and antifungal screening tests were conducted against the pathogenic bacteria Escherichia coli and Staphylococcus aureus, and the pathogenic fungi Candida albicans and Trichoderma harzianum, over a period of 36 hours. The results indicated that 12 isolates of mollusk-associated fungi exhibited antibacterial activity against the tested bacterial pathogens. Additionally, 4 of these 12 isolates also demonstrated antifungal activity. The antibacterial and antifungal activities were identified by the clear zones formed in the test medium. The screening tests revealed that fungi associated with molluscs possess antibacterial and antifungal activities against several tested pathogenic bacteria and fungi. Keywords: Pathogenic Bacteria; Association Fungi; Pathogenic Fungi; Molluscs
Mollusc Community Structure in Deep Ambon Bay Waters Pesilette, Rosmi; Natan, yuliana; Uneputti, Pruley Annete
Jurnal Moluska Indonesia Vol. 9 No. 1 (2025): April 2025
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v9i1.119

Abstract

Inner Ambon Bay has quite abundant fishery resources. Mollusks are one of the aquatic resources in Inner Ambon Bay, and have been used by the community for a long time. Environmental damage due to settlement expansion, sand mining, resort and café construction as well as over-harvesting of biota have an impact on the sustainability of mollusks in the waters of Inner Ambon Bay. This study aims to analyze the community structure of mollusks which include density, abundance, diversity, diversity and dominance as well as distribution patterns. This research was conducted in January 2024, using the square transect method at three research locations. Namely Tanjung Tiram, Poka Village, Waiheru Beach and Passo Beach. The mollusks obtained were 36 species consisting of 22 species of the gastropod class and 14 species of the bivalve class. The most widely found mollusks are mollusks of the class of gastropods of the family Nassaridae species Hebra corticata, and species that the least found were from the Genus Bursa, Cymatium and Nerita, the value of the diversity index (H') = 2.166, the diversity index (E) = 0.604 and the dominance index (D) = 0.236. Patterns of dispersal of mollusks are random and in groups.
The The Phylogenetic Analysis of Parmarion Martensi Simroth, 1893 Collections Of The Museum Zoologicum Bogoriense From Java Based On Cox1 Gene Prasetia, Ahmad Ghifari; Hermawan, Wawan; Nurinsiyah, Ayu Savitri
Jurnal Moluska Indonesia Vol. 9 No. 1 (2025): April 2025
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v9i1.120

Abstract

Parmarion martensi Simroth, 1893 is a snail a reduction of shell and often known as semislug. The species is distributed from Southeast Asia to the Hawaian Archipelago. There are two species of Parmarion in Java which can be distinguished only from the genitalia. This study was conducted to reveal the phylogenetic and genetic distance of P. martensi in Java based on the COX1 gene with K2P genetic pairwise distance, mrbayes, and IQtree analysis. The analysed specimens were the scientific collections of the Museum Zoologicum Bogoriense. We used two specimens from the GenBank for comparison, and three specimens as outgroup . The phylogenetic analysis resulted three clades i.e., clade A as consist of Microparmarion from Borneo as semi-slug outgroup, clade B consist of P. martensi from Java, and clade C consist of P. martensi from Taiwan. P. martensi has a polytomy relationship between P. martensi Java and Taiwan. Beside that, P. martensi Java also has a polytomy relationship between West Java and East Java species with statistical support (PP = 93; BS = 51). Then, genetic distance between P. martensi Java have genetic distance around 0 – 4,64 %, whereas genetic distance between P. martensi Java and Taiwan have a high genetic distance around 5.89 – 10.18%. In this case, P. martensi has a high threshold on the COX1 gene around 0 – 10.18% as the same species.
Distribution Pattern of Giant Clams (Tridacnidae) in Tebabinga Reef, Derawan Island Waters, East Kalimantan: Nugroho, Bimo Aji; Fauzi, Ahmad; Suciyati, Alfi
Jurnal Moluska Indonesia Vol. 9 No. 1 (2025): April 2025
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v9i1.121

Abstract

Derawan Islands, East Kalimantan, experienced a decline in the population of clams (Tridacnidae) due to over-exploitation and environmental changes. Although there are seven species of clams in Indonesia, data on their distribution patterns and factors affecting their survival in this area are still limited. This study aims to analyze the distribution patterns of clams on Tebabinga Reef and the abiotic factors affecting their habitat. The method used was observation with sampling using the belt transect technique at seven observation stations. Data collected included the number of individuals, size, and environmental parameters such as temperature, salinity, and pH. In the study, three types of clams were found: T. crocea, T. kerasa, and T. squamosa. T. crocea had a clustered distribution pattern (Id = 1.01), while T. kerasa (0.84) and T. squamosa (0.79) had a uniform pattern. Based on the type of substrate in Tebabinga Reef, the species T. kerasa is most common on coral massive, rubble, and sand substrates. Habitat conditions in Tebabinga Reef support the life of clams, although some abiotic parameters such as salinity and DO are below the quality standards. In conclusion, this study provides an overview of the distribution pattern of clams and environmental factors that affect their survival, and it emphasizes the importance of sustainable management to protect this species from further exploitation.
Biological Activity of Cassidula nucleus Extract from Semarang Waters Salsabilla, Sauwa Khusna; Pringgenies, Delianis; Gaol, Josua Gabriel Lumban
Jurnal Moluska Indonesia Vol. 9 No. 1 (2025): April 2025
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v9i1.124

Abstract

Molluscs are triploblastic coelomate metazoan organisms from the invertebrate phylum that have secondary metabolite profiles. Secondary metabolites of molluscs are formed due to adaptation to the surrounding environment. This study aims to analyse the secondary metabolite profiles of Cassidula nucleus species from Semarang waters. Cassidula nucleus samples were obtained from the mangrove ecosystem in Mangkang, Semarang, used the purposive sampling method. The methods used in this study include maceration extraction to extract compounds from mollusc samples, thin layer chromatography (TLC) tests for the separation and identification of metabolites, and antibacterial tests to evaluate the potential of the resulting mollusc extract. Maceration extraction was carried out using ethanol in a 1:7 ratio for 48 hours. The antibacterial tests was conducted on the pathogenic bacteria Eschericia coli and Staphylococcus aureus using the disc diffusion method. The extract concentrations tested were 1000 μg/disc, 500 μg/disc, 250 μg/disc, 125 μg/disc, and 62.5 μg/disc. Observations were made every 12 hours for a total of 36 hours. The research results indicated that the positive extract contained flavonoid and alkaloid compounds, which played an active role as antibacterial agents, as comfirmed by TLC test. Antibacterial activity against both pathogens was positive, as evidenced by the formation of a clear zone in the test medium. This study provides new insights into the potential bioactivity of Cassidula nucleus as natural ingredients for medical and health applications.
The Influence of Environmental Factors and Human Activities on Land Snail Diversity in the Sumber Brantas Arboretum and IPB Bogor Campus) Nurhayati, Putri Afin; Astuti Latif; Hanny Ramadhanti; Syifa Maulidia; Besse Fatimah; Windra Priawandiputra
Jurnal Moluska Indonesia Vol. 9 No. 2 (2025): Oktober 2025
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v9i2.88

Abstract

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.
The Distribution and Abundance of Gastropods and Bivalves on The Coast of Kecinan, Pemenang, North Lombok: Candri, Dining Aidil; Gusti Ngurah Eka Putra; Yuliadi Zamroni
Jurnal Moluska Indonesia Vol. 9 No. 2 (2025): Oktober 2025
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v9i2.106

Abstract

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.
Community Structure of Gastropods in Mangrove Ecosystem in Tanjung Pasir Village, Teluknaga, Tangerang District: Sasongko, Agung Setyo; Rahmawati, Lutviah
Jurnal Moluska Indonesia Vol. 9 No. 2 (2025): Oktober 2025
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v9i2.136

Abstract

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.
Diversity of Mollusks in The Intertidal Zone at Bahowo Beach, Manado, North Sulawesi Rotinsulu, Prasuci; Maabuat, Pience; Romenda, Ardiawan; Papu, Adelfia
Jurnal Moluska Indonesia Vol. 9 No. 2 (2025): Oktober 2025
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v9i2.143

Abstract

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.
Mollusk Community (Gastropods and Bivalves) in Suli Coastal Waters, Central Maluku, Indonesia Haumahu, Sara; Uneputty, Prulley A.; Supusepa, Junita
Jurnal Moluska Indonesia Vol. 9 No. 2 (2025): Oktober 2025
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v9i2.144

Abstract

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.

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