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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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Abundance of Macrozoobenthos in the Seagrass Field Ecosystem in Cemara Besar Island, Karimunjawa Islands Ria Azizah; Bagus Darmawan; Nur Taufiq SPJ
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.v4i1.18

Abstract

Seagrass has several important ecological functions which protected some species of invertebrates such as crustaceans, bivalves, gastropods, echinoderms, and other marine organism. Seagrass have ecological processes, where any interaction of several biotic and environment components. One of the biotic components associated with seagrass is macrozoobenthos. This study aims to determine the type and abundance of macrozoobenthos, the value of ecological index and covering percentage of seagrass at Cemara Besar Island, Karimunjawa. This study was conducted at Cemara Besar Island, Karimunjawa. The method used in this study was survey method with descriptive data analysis. Measurement of seagrass and macrozoobenthos using transect quadrant size of 1 x 1 meter. Macrozoobenthos living on the surface susbtrat (epifauna) was taken directly, while macrozoobenthos living within the substrate (infauna) using a corer was inserted into the substrate to a depth of 25cm. After conducting the samples were treated, the sediment sample sieved using benthos filter with a pore diameter of 1 mm and put macrozoobenthos into a sample bottle which has been given a 4% formalin solution and dye rose bengal, then identification of macrozoobenthos using a microscope and magnifying glass. Macrozoobenthos samples were analyzed using the calculation of abundance, the diversity index, the evenness index and the domination index. The result show that, in seagrass ecosystems in Cemara Besar Island Karimunjawa was found 4 classes macrozoobenthos consisting of Bivalve 3 species, Polychaeta 5 speseies, Echinoidea 4 species, and Gastropoda 25 species. The value of abundance in marine protection zone ranging from 6.32 to 8.42 ind/dm3 and the value of abundance in utilization zone marine ranging from 6.85 to 7.37 ind/dm3. The value of diversity index in the marine protection zone ranging from 1.42 to 2.57 are included in the category of low to moderate, while in the Marine Utility Zone ranging from 3.26 to 3.47 are included in the high category. The value of evenness index in the marine protection zone (E = 0.61 to 0.74) and utility zone (E = 0.77 to 0.82) were included in the high category (E > 0.6) in the second zone. The value of domination index in the marine protection zone (C = 0.20 - 0.48) and utility zone (C = 0.13 - 0.17) indicates that there are not macrozoobenthos species dominates. The Percentage cover of seagrass in marine protection zone from 68.75 to 76.04%, while the percentage cover of seagrass in utility zone ranging from 59.38 to 65.63%.
Gastropod Community Structure in Seagrass Waters in Panjang Island, Jepara, Central Java Tri Adi Nugroho; Ria Azizah; Ali Djunaedi; Delianis Pringgenies
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.v4i2.19

Abstract

Seagrass is a community that consists a large number of organisms which associated within. Organisms associated with seagrass are gastropods. The purpose of this research is to determine the structure of gastropods community at seagrass on Pulau Panjang, Jepara. Exploration methods was applied and data was analyzed descriptively. The location of research are divided into 3 locations based on 3 different densities of seagrass : sparse, medium and dense. Every location consists of 4 stations with 3 repetitions. The research was held during Desember 2014. Sampling using quadratic a frame size of 1x1 m. The result, there are were 15 genera gastropods of 8 families as followed Trochus (Ciridae), Strombus (Strombidae), Turbo, Astralium, Dentarene, Liotina (Turbinidae), Cantharus, Nassaria, Engina  (Buccinidae), Cerithium, Rhinoclavis, Clypeomorus (Cerithiidae), Morulla (Muricidae), Columbella (Columbellidae), and Neritodryas (Neritidae). The abundance in location I 108.75 ind/????2 with dense of seagrass density, location II 91 ind/m2 with medium of seagrass density, and location III 47,25 ind/m2 with rare of seagrass density. Index value of Gastropod diversity classified medium category, index value of gastropod similarity classified high category, it means abudance from each spesies can be said to be similar, and evenly distributed and not on domination by a specific species.  Community similarity index classified in the category of medium to very large 
Antibacterial Potential Chloroform Extract of Photobacterium phosphoreum Bacteria Symbiotic in Light Organs of Squid Loligo duvauceli Iin Putriyani; Delianis Pringgenies; Ali Ridlo
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.v4i2.20

Abstract

Microorganisms that live in association with marine invertebrates are able to produce a compound similar  to those produced by marine invertebrates and are thought to be potential as bioactive materials. Supplement  extracts from the Photobacterium phosphoreum bacterial culture have been shown to have antibacterial activity. The purpose of this study was to determine the anti-bacterial activity of the chloroform extract of Photobacterium  phosphoreum biomass against pathogenic bacteria Bacillus substilis, Staphylococcus aureus, Salmonella sp. and  Escherichia coli. The extraction process was carried out by the liquid-liquid extraction method. Fractionation was  performed using Open Column Chromatography (KKT). The antibacterial activity test was conducted by the agar diffusion method according to Kirby-Bauer. The results showed that for the antibacterial activity test of crude  extract, the largest inhibition zone diameter occurred in Escherichia coli with a concentration of 50 µg / disk at 24 h incubation, namely (9.80 ± 0.75 mm), while the smallest inhibition zone diameter occurred in Salmonella sp. by  giving a concentration of 10 µg / disk at an incubation time of 48 hours, namely (6.03 ± 0.05) mm. Of the 6  fractions resulting from crude extract fractionation, it was known that fraction 5 was the most active fraction and  inhibited the growth of the tested bacteria. The largest inhibition zone diameter occurred in Escherichia coli (9.83  ± 0.28) mm, while the smallest inhibition zone diameter occurred in Salmonella sp. (8.63 ± 0.20 mm)
The Effect of Increasing pH on Heavy Metal Content of Cu and Cd and Structure of the Gills and Coats of Anadara granosa with Scanning Electron Microscopy (SEM) Study Isa Anzori; Delianis Pringgenies; Sri Redjeki
Jurnal Moluska Indonesia Vol. 3 No. 1 (2019): April 2019
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v3i1.21

Abstract

Significant changes in pH, both acidic and alkaline, can disrupt water quality. Furthermore, it will affect the life of aquatic biota. The purpose of this study was to determine the effect of increasing pH on heavy metal concentrations of Cu and Cd (quantitative) in shellfish bodies and on the level of damage to the gills and mantle shells (qualitative) by scanning electron microscopy. The research was conducted at the Integrated Marine Science Laboratory, UNDIP Semarang. Heavy metal analysis was carried out at Wahana Laboratorium Semarang. The scanning electron microscopy process was carried out at the Electron Microscopy Unit, Faculty of Medicine, UNAIR Surabaya. The results of the heavy metal analysis both Cu and Cd showed that pH 9 had the highest heavy metal content, namely Cu = 0.33 mg / kg while Cd = 0.57 mg / kg. Whereas for pH 7, the lowest heavy metal concentration was obtained for Cd = 0.35 mg / kg, but for the lowest Cu was found at pH 8 of 0.21 mg / kg. The differences were seen in the SEM results of gills and mantle ph 7 and 9. Observations on mantle epithelial cells and gill filaments with a magnification of 75 and 1000X showed that at pH 7 the epithelial cells had regular folds, the distance between the barriers was clear and the size was normal. Whereas at pH 9 it has irregular folds, the distance between the bulkheads is hollow and perforated. The gill filaments of pH 7 have a smooth filament structure and clear between the filaments.
Study on the Development of Spiral babylonia snail Tiger Snail Juvenil Eggs (Babylonia spirata Linnaeus, 1758) in the Laboratory Muhammad Fatoni; Delianis Pringgenies; Ali Djunaedi
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.v4i1.22

Abstract

Several marine gastropods are known to have high economic value, one of which is the Spiral babylonia snail. They commonly exploited for meat, shell, or operculum. Tiger snail meat is commonly exported and consumed by fishermen. Its shell is used as a material for industrial lime and for omamen. Operculum is commonly used as a medicinal and perfume ingredient). However, the recent production has decreased due to the limited information of seasonal catch. One way to overcome these obstacles is through culture activities. The provision of seeds is an important link in the culture system, therefore the study of the spawning process and larval development is an important requirement for the development of larval rearing techniques. This study aims to determine the development process of juvenil eggs and the survival rate of tiger snails reared in the laboratory.. The study was conducted at the Laboratory of Marine Farm Subdivision in Kudus, Pt Pura Bahari, Jepara Regency. This sudy used experimental method with descriptive data analysis. Adult tiger snails were caught from Bunga waters, Demak. The snails were reared in a rectangular tube filled with 15 cm filtered sea water and 5 cm of sand. Egg capsules were reared in a 4 liters circular tube with continuous aeration. The hatched larvae were reared in a 300 liters circular tube filled with filtered seawater, continuously aerated and fed with Chlorella plankton . Our result showed that tiger snails spawn naturally and produce egg capsules. The incubation period for the capsule is 6 days, then develop into veliger larva for 12 days. The veliger larvae metamorphosed,and become juvenil. The lowest survival rate observed in the veliger stage. The survival rate of the egg and the intracapsular trochopore stages were quite high (tube I = 98.413%; tube II = 98.238%; tube III = 90.476%), then the lowest was in the veliger stage (tube I = 3,468%; tube II = 2.603%; tube III = 2,598%) and the juvenil stage is quite high compared to the previous phase (tube I = 3,413%; tube II = 2,479%; tube III = 2,351%).
Isolation of Luminescent Bacteria on Loligo duvauceli and Euprymna berryi squid Abdul Kodir Jaelani; Delianis Pringgenies
Jurnal Moluska Indonesia Vol. 3 No. 1 (2019): April 2019
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v3i1.23

Abstract

Bioluminescence is known to be found in squids. Bioluminescence occurs as a result of reactions from within the body (intrinsic bioluminescence) or by luminescent bacteria that are outside the body (extrinsic bioluminescence). This study aims to examine the results of the isolation of luminescent bacteria found in the light organs of Loligo duvauceli and Euprymna berryi squid. Squid sampling was carried out in the waters of Awur Bay, Jepara. Meanwhile, bacterial isolation and analysis were carried out in the Laboratory of Aquatic Animal Health Management (MKHA) of the Central for Brackish Water Cultivation Development (BBPBAP) Jepara. The research method used in this research is descriptive method with the sampling technique using purposive sampling technique. The results of the research on Loligo duvauceli squid obtained 2 isolates of luminescent bacteria, 1 isolate from N.A. and 1 isolate from TCBSA media. Whereas in Euprymna berryi squid there were also 2 isolates, 1 isolate from N.A. and 1 isolate from TCBSA media. The glow produced by luminescent bacteria is bluish green. In general, the luminescent bacteria isolated from the Loligo duvauceli squid was stronger than the light rays of the bacteria isolated from the Euprymna berryi squid. The total number of luminescent bacterial colonies found in the light organ of Loligo duvauceli squid was 15.47.108 CFU / mL. While the total number of luminescent bacterial colonies in the light organ of the squid Euprymna berryi was 15.1.107 CFU / mL.
Molluscs Combing on The Coast of Karang Hawu, West Java Bunjamin Dharma
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.v4i1.24

Abstract

Karang Hawu Beach faces the Indian Ocean, so the presence of mollusks in the area varies widely and can increase in variety due to natural phenomena, such as earthquakes and tsunami outbreaks. The research objective was to obtain gastropods and bivalves (mollusks) by sweeping the Karang Hawu beach, West Java. Samples were collected from the coastal waters of Karang Hawu, West Java using the coastal sweeping method, then the samples were identified. The results showed that there were 3 classes of mollusks, namely: Cephalopod class, Bivalvia class, and Gastropod class with 42 families and 146 species of mollusks. Mollusks, with the highest gastropod class (38 families, 140 species), Bilavia class (3 families, 5 species), and Cephalopod class (1 family, 1 species). Results of the study concluded that based on the Molluscs sweeping the coast of Karang Hawu, West Java, it has a diversity of Molluscs, namely 146 species of mollusks from 3 classes, which were Gastropods, Bivalves, and Cephalopods.
Littoraria scabra (Linnaeus, 1758) (Littorinidae: Prosobranchia) in The Mangrove of Bunaken Island, North Sulawesi Farnis B. Boneka; Lumingas L.J.L.; Pratasik S.E.
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.v3i2.25

Abstract

Bark of mangrove trees harbor populations of Littoraria scabra. The snails are preyed upon by aquatic and terrestrial predators. To investigate the main direction of predation, foui· Avicennia trees were seeded with 30 marked snails each. The snails were placed on trees variously protected by net cages: one tree with a fully closed cage to prevent access of all predators, one with a cage open above to allow entry of terrestrial predators, one with a cage open at the bottom to allow entry of aquatic predators. The fourth tree, without net, served as control. Snails were counted every 2 weeks. In the fully closed cage, the number of snails was relatively constant for 12 weeks, and survival was significantly different from the other trees. On the partly caged trees and the control tree, the number of snails declined drastically during the first four weeks. This indicates that aquatic predators (crabs), entering the tree from below, preyed on the Littoraria. Terrestrial predators, entering the tree trunk from above, are unknown.
Growth of Oyster Crassostrea Sp Settled on Shell and Stone Collectors Fredinan Yulianda; Agus Soleh Atmadipura
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.v4i2.26

Abstract

During a 4-weeks period oyster spat at- tached on shell and stone collectors but not on roofing tile  submerged in estuarine and marine habitats. Collectors made of stone (rough surface) were better than collectors  of shell in terms of number of settled spat. The oyster spat settled at highest density on collectors close tothe sea.  The average growth in terms of weight was significantly different on the two types of collectors. The largest oysters  occurred on shell collectors near the river
Growth and Survival of Juvenile Giant Clam Tridacna squamosa as a Function of Density Gunarto Latama; A. Niarti Ningsih; Inayah Yasir; Hasyim
Jurnal Moluska Indonesia Vol. 3 No. 1 (2019): April 2019
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v3i1.28

Abstract

Juvenile Tridacna squamosa (less than 1 cm shell length) were placed in concrete trays in a coral habitat at the Marine Station of Hasanuddin University, Barang Lompo Island, South Sulawesi, Indonesia. A nylon net was used to protect against predators. The clams were stocked at 3 densities: 1000, 500, and 250 ind. m-2. Growth and survival were monitored in triplicate experiments. Growth was negatively correlated with density and significant differences were found between densities of 1000 and 250 ind m-2. After three months at the lowest density the mean shell length increment was 9 mm. There was no significant relation between density and survival rate.

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