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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 50 Documents
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Reconstruction of Light Organ in Squid With The Histological Method of Electron Transmission Microscope Delianis Pringgenies; Dafit Ariyanto
Jurnal Moluska Indonesia Vol. 5 No. 1 (2021): April 2021
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v5i1.1

Abstract

The light organ is an electronic device that can emit light. However, there are light organs in animals that can produce light naturally. Loligo duvaucelii is a species whose biolumenesence comes from fluorescent bacteria that live in symbiosis in its ink sacs. This study aims to determine in detail the construction of the squid light organ using the transmission electron microscopy (TEM) method. The results showed that this type of squid has a pair of light organs attached to the dorso-lateral ink sac. The light organ is spherical, some are found on the surface and some are embedded on the wall of the ink sac. It consists of a lens that is located on the outer surface of the ink sac, and a sac of light organs (embedded on the wall of the ink sac) with channels connecting the pocket to the mantle cavity. The wall of the sac of the light organ consists of three layers, namely the innermost layer which is multi-fold with microvilli on the cell surface and between the folds of the sac populated with bacteria, the dense layer that acts as a reflector, and the pigment layer. Cilia are observed on the surface of the duct connecting the sac with the mantle cavity. This study concluded that the construction of the squid light organ has a convex-shaped lens structure and is muscular. In the pockets of light organs, a dense population of bacteria is found. The reflector consists of many layers, and the pigment layer contains many granules.
Ecomorphology of Ostrea edulis (Linnaeus, 1758) in Kuala Gigieng Waters, Aceh Besar District Chitra Octavina; Fredinan Yulianda; Majariana Krisanti; Isdradjad Setyobudiandi
Jurnal Moluska Indonesia Vol. 5 No. 1 (2021): April 2021
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v5i1.3

Abstract

Ostrea edulis is one of the most common types of meat oysters and is commonly consumed by people in Kuala Gigieng, but until now there is not much scientific information about this species. The purpose of this study was to describe the ecomorphology of Ostrea edulis in Kuala Gigieng waters. This research was conducted from August to September 2013 in Kuala Gigieng Waters, Aceh Besar District. The method used in this research is purposive sampling. Identification of samples based on shell morphological characteristics including the exterior and interior of the shell using a magnifier lamp. The results showed that Ostrea edulis found in Kuala Gigieng waters had round, rough, hard, thick and uneven shells. The two valves are also not the same size, where the left valve is more concave than the right valve which tends to be flat. This is a form of the adaptation pattern of Ostrea edulis in Kuala Gigieng which tends to have a medium sand and clay sand substrate with a fairly high predation from both natural and human predation.
Production and Biomass of Pokea Clam (Batissa violacea var. celebensis von Martens, 1897) in the Langkumbe River Waters North Buton Southeast Sulawesi Tri Abdul Rahman; Bahtiar Bahtiar; Pramono Hery Santoso
Jurnal Moluska Indonesia Vol. 5 No. 1 (2021): April 2021
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v5i1.4

Abstract

Langkumbe River is located in West Kulisusu District and has long been used by the community for various daily activities. One of the resources often used by the people around Langkumbe River is pokea clams. The aim of this study was to determine the production and biomass of pokea clams (B. violacea) in Langkumbe River Waters of North Buton Regency from August to October 2017. The sampling method used was swept area method using a traditional fishing gear "Tangge" (fishing gear). The samples were measured for the length, width and thickness.  The total weight was measured with the clam/total mass (MT) and the weight of the meat. The samples were dried using an oven for 24 hours at 70 °C to obtain the shell-free dry mass (SFDW). Data were analyzed using standard formulas. The total sample obtained was 1.307 individuals. The highest density of pokea clam was found in August at 596.8 ind/m². Annual production of pokea clam (B. violacea) in Langkumbe River with a total annual production of 1,107.33 gSFDW/m2/year. The highest and lowest production are 297.09 gSFDW/m²/year at size 2.19-2.54cm and -0.16 gSFDW /m²/year at size 4.70-5.05cm, respectively. The total population biomass was 528.03 gSFDW/m2 with the highest biomass 171.72 gSFDW/m²/year at size 2.55-2.90 cm and the lowest was 1.40 gSFDW /m²/year at size 4.70-5.05 cm, so that the recovery rate (P/B ratio) was 2.1 gSFDW/m2/year.
Identification of Molluscan Animal Image in Two-Dimensional Print Media Nova Mujiono; Alfiah Alfiah; Riena Prihandini; Pramono Hery Santoso
Jurnal Moluska Indonesia Vol. 5 No. 1 (2021): April 2021
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v5i1.5

Abstract

Humans have known mollusks for a long time. The diverse and unique shell shapes are interesting to draw. The easiest medium to describe the shape of a mollusk is in two dimensions. This study aims to identify various images of mollusks in two-dimensional print media such as cloth, paper and plates. Based on the 10 sources of photos analyzed, 56 species of mollusks from 38 families were identified. The Gastropod class dominates with 45 species from 31 families, followed by Bivalves with 7 species from 5 families, then Cephalopods with 4 species from 2 families. Some of the problems found are the shape and proportion of images that different with specimens, some inverted or cropped images, different direction of rotation of the shells with specimens, and different colour patterns with specimens. Biological and distributional aspects of several families will be discussed briefly in this paper.
Spesies Diversity and Abudance of Nudibranchia in Tulamben Waters, Bali Marchel Marchel; Felicia Zahida; Ign. Pramana Yuda
Jurnal Moluska Indonesia Vol. 5 No. 1 (2021): April 2021
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v5i1.6

Abstract

Nudibranchia is the largest order of Opistobranchia which is known to have about 3,000 species. Nudibranchia is a popular macro photography object among divers. Although Tulamben Waters, Bali is one of popular destination for macrobiota’s habitat, but research on marine biota, especially nudibranchia in these waters is still very rare. This study uses two methods, which is direct observation to reveal diversity and species number, belt transect methods to estimate density or abundance per sampling area using diving techniques . A transect line of 50 m at each point of observation site was used to evaluate abundance. This study wants to see the level of diversity, mapping various species and abundance of nudibranchia. For biodiversity, 31 species from 15 families are found, Chromodoridae, Dorididae, Elysiidae, Facelinidae, Flabellinidae, Goniodorididae, Halgerdidae, Hexabranchidae, Phyllidiidae Polyceridae, Hydatinidae, Costasiellidae, Elysiidae and Limapontiidae. Whereas the transect method found 12 species from 6 families, Chromodoridae, Facelinidae, Phyllidiidae Aglajidae, Costasiellidae, and Elysiidae. With a diversity index of 2.27 and the highest level of abundance found in Pteraeolidia ianthina species with a relative abundance of 0.19%.
Habitat Preferences of PokeA (Batissa violacea var. celebensis von Martens, 1897) Basic on Substrat Characterisation in Pohara River Southeast Sulawesi Bahtiar Bahtiar; Muh. Fajar Purnama
Jurnal Moluska Indonesia Vol. 4 No. 2 (2020): Oktober 2020
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v4i2.9

Abstract

This research is motivated by the lack of information about the habitat preferences of pokea clams in Pohara River, Southeast Sulawesi. This study aims to determine the density, distribution pattern and habitat preferences of pokea clams in the Pohara River, Southeast Sulawesi. This research was conducted for 6 months (April-September 2011). Sampling of pokea, water quality, and sediment texture was carried out in the Pohara River and analyzed at the FPIK UHO Laboratory. The density and distribution of pokea were calculated using a standard formula and analyzed using Mann Whitney and Chi Square respectively, while the habitat preferences based on different substrate textures were analyzed using Principal Component Analysis (PCA) and Cluster Analysis (CA) in the Multivariate Statistical Package (MVSP). The results showed that the density of pokea clams ranged from 117±96.78-816±594.84 ind/m2 which was distributed in cluster over the entire cross-section of the river. Pokea clams were found in all substrate textures from gravel to clay. The habitat preference of pokea clams indicated by the highest density was found in the clay texture. Pokea clams relatively do not like the habitat of coarse sand and gravel texture which is characterized by pokea population with the lowest density
Study of the Types of Molluscs Used by Communities, in Lake Sentani, Papua Suriani Surbakti
Jurnal Moluska Indonesia Vol. 4 No. 2 (2020): Oktober 2020
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v4i2.10

Abstract

The distribution of molluscs in Lake Sentani depends on their broad adaptability, dispersal ability, and zoogeographic history and ecological conditions. Ecological conditions in Papua have undergone many changes after the passage of special autonomy. A study on mollusk groups used by the community was carried in May-June 2018. Several government programs that require new land clearing for settlements, infrastructure development and agricultural areas have resulted in the conversion of sago forests, rivers, swamps, mangrove forests and lakes as places of interest. New settlements and shopping centers, consequently the degradation of Lake Sentani is unavoidable. Lake Sentani is currently under a lot of pressure from both internal and external factors. Some observers of lake ecology generally only conduct studies on water quality, but have not studied much of the fauna diversity, the potential of the lake's biological resources, let alone study the diversity of mollusc species and the types used by the community and the threat to the sustainability of the mollusk groups that are used. The public's understanding of the existence of Molluscs from an ecological and economic point of view has contributed greatly. From the survey results in Lake Sentani, the types used by the community are: Thiara sp. Pomacea canaliculata,  Pilsbryoconcha exilis, Bellamya sp, and Faunus sp. in the in-let area. Utilization of mollusk groups as a source of  family economy is also the second source of protein after fish, while in mountainous areas, certain types of mollusk  shells are still used as a legally valid medium of exchange locally.
Characteristics of Crassostrea Oyster Cytochrome Oxidase Subunit I (Coi) Gene As Species Identity In Delta Cimanuk, West Java Dian Rezki Muliani; Fredinan Yulianda; Nurlisa A Butet
Jurnal Moluska Indonesia Vol. 4 No. 1 (2020): April 2020
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v4i1.11

Abstract

Oysters belong to the Crassostrea, which is a type of shellfish that lives as benthos in waters under the same substrate and environmental conditions will exhibit similar morphological changes in response. There are many types of oysters that have a similar shape are often an obstacle to differentiate of Crassostrea species through morphological identification. The purpose of this research was to identify the types of oysters found in the waters of Delta Cimanuk through analysis of the morphology and nucleotide diversity of Cytochrome Oxidase subunit I (COI) gene, as basic information on proper management and conservation. The morphological identification results show that there were two species of the Crassostrea. Identification of species through the Barcoding DNA technique shows that there is one type of oyster: Crassostrea iredalei with an accuracy of 99.5%.
Spatial Distribution of Pacific Oyster (Crassostrea gigas) Population Related Environment Factor in Coastal Water of Pabean Ilir, Indramayu Risma Qurani; Fredinan Yulianda; Agustinus Mangaratua Samosir
Jurnal Moluska Indonesia Vol. 4 No. 1 (2020): April 2020
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v4i1.12

Abstract

Pacific oysters (Crassostrea gigas, Thunberg, 1793) is a benthic organisme that tend to live and settle in the bottom. One of the pacific oyster habitat is Coastal Water of Pabean Ilir, Indramayu. The purpose of this study was to map spatial condition of the population related habitat of the oyster (Crassostrea gigas). The mapping were done with laptop, using Arc GIS. There were 15 points of sampling. The oyster population in Pabean Ilir can be categorized into three categories: low, medium, and high density. Based on the similarity of environmental characteristics the habitat were divided into four groups. Condition Coastal Water of Pabean Ilir such as temperature, salinity, pH, BOD, TSS, TDS, COD, and composition of substrate indicated Coastal Water of Pabean Ilir have compatibility optimum sufficient habitat to support the growth of pacific oyster
Survey of Snail And Slug Pests On Agricultural Land In Java (Gastropoda : Pulmonata) Mujiono Nova
Jurnal Moluska Indonesia Vol. 3 No. 2 (2019): Oktober 2019
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v3i2.15

Abstract

The diversity of terrestrial gastropods as horticultural pests in Java has been examined. Six species of gastropoda, of which three species are snail and three others are slug, were collected and identified from 18 host-plant species from 20 observed locations. Some of them are economically destructive. Bradybaena similaris is capable of attacking 18 plant species, while Parmarion martensi also capable of attacking 10 plant species. Both species are potentially detrimental for local farmers. This paper will deal with the morphological identification and distribution of each species, as well as their attack and impact to their host-plant species.

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