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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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Diversity of Bivalves in Cengkrong Mangrove Trenggalek, East Java Based on Morphological and Molecular Character Mukhlis, Mukhlis; Niken Satuti Nur Handayani; Trijoko
Jurnal Moluska Indonesia Vol. 8 No. 1 (2024): April 2024
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v8i1.75

Abstract

Bivalves in mangrove ecosystem plays an important role in the process of litter decomposition and mineralization of organic matter, especially that are herbivores and detrivor. Bivalves in one ecosystem can be known by looking the morphologic character, while the molecular character can be use to know the genetic variation of species in population. The purpose of this research was to determine species diversity of bivalve, and to understand the morphological and molecular characters of them. Phenetic Similarity analyzed using 109 morphological characters, ISSR 6 ISSR 8 primer. The results were analyzed using MVSP 3.1 (Multi-Variate Statistical Package) program to obtain a dendogram that show similarity of bivalves. Four species of bivalves identified, consisting of Polymesoda Erosa, Meretrix meretrix, Pholas sp., and Glauconome virens. Based on morphological and molecular analysis showed two main clusters with the similarity of 54.8% for morphology and 57.6% for molecular. Based on analysis of morphological and molecular characters, it can be concluded that the diversity of the bivalves in ​​mangrove forests Cengkrong is influenced by morphological structure, meristik, morphometric shell, and the type of habitat.
Significance Of Reproduction Especially Mating And Larval Releasing Of Littoraria scabra (Gastropoda: Littorinidae), In Tombariri Mangrove, North Sulawesi, Indonesia Lalita, Jans Djoike
Jurnal Moluska Indonesia Vol. 8 No. 1 (2024): April 2024
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v8i1.80

Abstract

This study used Littoraria scabra as a model of research that attempted to understand how the species optimize their survival in mangrove area. It was aimed at investigating the reproductive significance of oviviparous L. scabra and larval release periodicity in order to maintain their survival in mangrove ecosystem. Reproductive observations of L. scabra were done by looking at mating, larvae releasing rate. Results showed that the reproductive significance of L. scabra was observed as follows: a) there were 64.58% of mating pairs on the stem of S. ovata; b) Mating L. scabra releasing the larvae did not have gonad reduction; c) L. scabra released significantly larger female larvae than male.Specific significance of ovoviviparous species L. scabra with reproductive patterns, i.e mating, larvae releasing rate, was to optimize their reproductive significance in extreme three-dimensional mangrove habitat. This study concluded that the reproductive significance of male L. scabra possessed a uniqueness and very rare in nature larva storing system and quickly released larvae. This study support research 2016, also found the reproductive significance in which males and females, while mating, released larvae with bi-lunar and tidal cycles.
The Size Structure and Growth Pattern of Squid (Loligo sp.) in Majene Waters, West Sulawesi Province Alam Nasyrah, Adiara Firdhita; Hudriyah Idris; Eva Muhajirah; Anna Heirina
Jurnal Moluska Indonesia Vol. 8 No. 1 (2024): April 2024
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v8i1.96

Abstract

Squid belongs to the phylum Mollusca, specifically the Cephalopoda group (soft-bodied animals) which is one of Indonesia's fisheries resources. One of the regions abundant in squid fisheries resources is the waters of Majene, West Sulawesi Province. This research aims to determine the distribution of the captured squid's size structure and growth patterns in the waters of Majene. Squid sampling was conducted in July–August 2023. The sampling procedure involved randomly selecting squid catches from fishermen in the waters of Majene with a sampling frequency of once a month, resulting in a total of 102 specimens of Loligo sp. squid, consisting of 82 males and 20 females. Overall, the range of mantle length obtained for Loligo sp. squid was 90–180 mm, with a weight range of 26.08–306.19 g. The majority of male squid caught during the study had a mantle length in the range of 127–138 mm, while female squid had a mantle length range of 115–126 mm. Based on statistical analysis, the growth pattern of combined and male Loligo sp. squid in the waters of Majene exhibited negative allometric growth, meaning that weight increase was more dominant than length increase. In contrast, female squid exhibited positive allometric growth, indicating that weight increase was more dominant than length increase.
Distribution Pattern of Gafrarium tumidum and Their Habitat Conditions in Mangrove Ecosystems of Rutong Village and Waai Village, Ambon Island Janson Hans Pietersz; Imanuel Villian Trayanta Soukotta; Elizabeth Miklen Palinnussa; Yofita Anaktototy
Jurnal Moluska Indonesia Vol. 8 No. 1 (2024): April 2024
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v8i1.99

Abstract

Gafrarium tumidum species on Ambon Island can be found in the mangrove ecosystem areas of Rutong Country and Waai Country, when sea water conditions recede the people of Rutong Country and Waai Country often use G. tumidum species for consumption. The purpose of this study is to determine the density and distribution pattern of G. tumidum, know the habitat conditions and know the relationship between the abundance of G. tumidum and its habitat characteristics. The process of collecting data on mangrove conditions, Gafrarium tumidum species and environmental parameters was carried out using the Stratified Random Sampling method. Data collection of mangrove canopy cover was carried out using a simple Hemispherical Photography method. The highest density of G. tumidum is found in Waai Country with a distribution pattern of G. tumidum in Rutong Country has a uniform distribution pattern and in Waai Country has a clustered distribution pattern. The habitat conditions of G. tumidum can be explained that, only Sonneratia alba species found at all observation stations in both locations with overall mangrove conditions in both locations having sparse density conditions and moderate canopy cover. Salinity conditions at both locations vary. Then the substrate condition in both locations there are two types of substrate, namely sandy stone and rocky sand with the most dominant type of substrate in both locations, namely sandy stone. The relationship between the abundance of G. tumidum and habitat characteristics in each location has an inverse or negatively correlated relationship and the abundance of G. tumidum is more likely to cluster at Rutong 1 and Waai 5 stations.
Mollusc Diversity in Lendang Luar Beach North Lombok Candri, Dining Aidil; Aulia Zahara, Asha; Engelina Noer Soraya; Aina Ul Mardiati; Slamet Kurniawan Riandinata
Jurnal Moluska Indonesia Vol. 8 No. 1 (2024): April 2024
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v8i1.100

Abstract

Mollusks are a group of marine biota that are components of aquatic ecosystems and have an important role in ecological functions. This research was conducted to find out the mollusk species that live in the waters of Lendang Luar Beach, North Lombok Regency. This research was conducted in July 2022 using a purposive sampling method and free sample collection. Based on the inventory results, it was found that there were 20 species of molluscs representing 9 families, of which the most numerous species were from the Strombidae family, namely 5 species. Meanwhile, the fewest species from the Pisaniidae and Cardiidae families are one species each. The highest diversity of Mollusk species is spread across the colon with 11 species of Molluscs, where the dominant habitat of Molluscs is in rocks.
Growth and Survival of Larvae (Trochus niloticus) as a Function of Light Density Latama, Gunarto
Jurnal Moluska Indonesia Vol. 8 No. 2 (2024): Oktober 2024
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v8i2.27

Abstract

Light is an important factor controlling the activity of the nocturnal snail Trochus niloticus. The importance of light for the survival and growth of the larvae was studied in aquaria exposed to the sunlight and compared to similar groups shaded by black nylon net. A higher number of larvae metamorphosed in the aquarium exposed to sunlight, but the average survival rate was highest in shaded aquaria. Survival increased significantly as a function of increasing degree of shading. A survival of 93.03 ± 2.86 % after 49 days was achieved after proper shading, thereby eliminating the major problem ofhigh mortality of T. niloticus in aquaculture. No significant difference was observed between light intensity and growth.
Identification of Mangrove Molluscs in Forest of Toniku West Halmahera District of South Jailolo North Maluku Province Tyas Asrining Pertiwi, Reni; Widiyanti, Endah Sri; Abdulah, Farid Muhammad; Surya, Sunelsya
Jurnal Moluska Indonesia Vol. 8 No. 2 (2024): Oktober 2024
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v8i2.66

Abstract

  The people of Toniku Village exploite the mangrove forest to meet their daily needs, especially to get protein needs when the weather at sea is not possible to catch fish. Mollusks as a source of protein that provides nutrition for coastal communities, especially the people of Toniku Village. This study aims to identify mollusks found in the Mangrove Forest of Toniku Village. Sampling method using purposive sampling. Biota sampling was carried out at five stations in rows three times on a plot size of 10 m x 10 m. The sample preserves and is identified based on the literature and World Register of Marine Spesies. The data analysis used was qualitative. The results obtained were two classes, four families, and six mollusk species. The mollusk found in the mangrove forest of Toniku Village were Ellobium aurisjudae, Cerithidea quoyii, Telescopium telescopium, Neripteron violaceum, Vittina cumingiana, and Geloina erosa.
Community Structure of Mollusca in Sulamanda Beach, Kupang Regency, East Nusa Tenggara Kana, Ferderika Rame; toruan, lumban nauli lumban; Saraswati, Suprabadevi Ayumayasari
Jurnal Moluska Indonesia Vol. 8 No. 2 (2024): Oktober 2024
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v8i2.101

Abstract

Molluscs (Gastropods and Bivalves) are organisms that are sensitive to environmental changes. This research was conducted at Sulamanda Beach, Mata Air Village, Central Kupang Subdistrict, Kupang Regency. This study aims to determine the community structure of Gastropods and Bivalves using the approach of species density, diversity, uniformity and dominance. Information on the community structure of Gastropods and Bivalves in Sulamanda Beach is needed in an effort to support sustainable tourism management. This research used observation method. Determination of stations using purposive sampling method. Gastropod and Bivalve sampling used line transect method by installing a 1 X 1 m² quadrant frame. Sampling of water samples for water parameters was carried out at each observation station. The results showed that Sulamanda Beach has 16 species of mollusks consisting of 12 species of gastropods from 5 families and 4 species of bivalves from 2 families. The species with the highest density was Murichorda fiscellum with a value of 2.4 Ind/m². The diversity index of Gastropods and Bivalves tends to be high with a uniformity index value tending to be moderate, while the dominance index shows a value that tends to be low. The physical and chemical parameters of the waters show that the water conditions are in good condition because they are still within the tolerance limits of the two classes. The bottom substrate is dominated by rocky sand. Therefore, the overall community structure of Gastropods and Bivalves in Sulamanda Beach, Kupang Regency is considered stable and balanced.
The Diversity of Molluscs (Gastropods and Bivalves) in Wabula Waters, Buton Regency, Southeast Sulawesi: Indonesia Haydar, Haydar Ali Yahya; Pringgenies, Delianis; Wijayanti, Diah P.
Jurnal Moluska Indonesia Vol. 8 No. 2 (2024): Oktober 2024
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v8i2.102

Abstract

Gatropods and Bivalvia class mollusks can be found in both freshwater and marine environments. Mollusks from the Gastropod and Bivalvia classes that live in the sea are often found in the intertidal to subtidal zones. Wabula is one of the coastal areas on Buton Island. The waters of Wabula are used as a tourism site, traditional site, and also as a conservation area for fisheries resources. Information regarding the diversity of mollusks in Wabula waters is still limited. This research aims to determine the diversity of mollusk species in the Gastropod and Bivalvia classes in Wabula waters through the analysis of density, diversity, and dominance indices. This research uses quadrant transects measuring 1 x 1 meters. The research was carried out at three stations: Station I on the coast, Station II in seagrass beds, and Station III in the coral reef ecosystem. The composition of the mollusks from the Gastropod and Bivalvia classes found was 158 individuals, consisting of 20 species from the Gastropod class and 3 species from the Bivalvia class. The most commonly found mollusk genera are Rhinoclavis vertagus and Nerita histrio. The ecological index values ​​obtained are density ranging from 10.3-28 Indiv/; diversity (H') 1.44-1.77; uniformity (E) 0.73-0.90; and dominant (D) 0.19-0.34.
Mollusks in the Mangrove Ecosystem: Exploring the Diversity of Life Among Mangrove Roots at Mangkang Beach, Tugu District, Semarang City.: Wikrama, Altafa Ghanaya Ramadya Wikrama
Jurnal Moluska Indonesia Vol. 8 No. 2 (2024): Oktober 2024
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v8i2.105

Abstract

Mangrove ecosystems are considered essential habitats for mollusks. The biodiversity of organisms living among mangrove roots, such as gastropods and bivalves, plays a crucial role in the ecological function of mangrove ecosystems. Mollusk diversity serves as an indicator of the richness of biodiversity in these areas. This study aims to obtain up-to-date information on mollusk diversity in the mangrove ecosystem at Mangkang Beach, Tugu District, Semarang City. The research method used was purposive sampling, which is a method of determining station locations based on specific criteria that can represent a population. The study was conducted by describing the types of mollusks found. Based on the research results, 133 mollusks were found, consisting of 9 species. The species obtained were Telescopium telescopium, Cerithideopsilla alata, Cerithidea cingulata, Cerithidea obtusa, Cassidula aurisfelis, Filopaludina sp., Pomacea canaliculata, Crassostrea virginica, and Crassostrea rhizophorae, with the dominant species being Cerithidea. The differences in mollusk abundance at each station are suspected to be caused by several factors, such as the mangrove ecosystem being located near residential areas, resulting in uneven distribution of mollusks. The difference in mangrove species also serves as an indicator of the influence on mollusk abundance in this ecosystem.

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