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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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Stomach Contents In Relation To Shell Length, Width, and Weight in the Gastropod Trochus niloticus L Eddy Soekendarsi; Slamet Santosa
Jurnal Moluska Indonesia Vol. 6 No. 1 (2022): April 2022
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The stomach content of 66 individuals of Trochus niloticus contained 42 potential food taxa. The composition   reflected that the snails had grazed on the surface of dead corals. Chrysophyta, Chlorophyta, Rhodophyta, Foraminifera, Cyanophyta, and settled pelagic organisms were mixed with a large quantity of detritus and sand.  The snails measured 2.3-11.9 cm in shell length, 2.6-12.3 cm in shell width, 0.93-84.82 g in soft body wet weight, and the weight of stomach contents was 0.03-10.09 g. The relationship between shell length and weight of stomach content was y=0.0373 exp(0.5003x), r=0.91; between shell width and weight of stomach content: y=0.0325 exp(0.4974x), r=0.92, and between soft body wet weight and weight of stomach content: s=:0.1793   + 0.0785x, r=0.97.
Gastropods Diversity at Siklotok Waterfall and Silangit Waterfall, in Purworejo Regency, Central Java Amelia Pergiwa; Felicia Zahida; A. Wibowo Nugroho Jati
Jurnal Moluska Indonesia Vol. 6 No. 1 (2022): April 2022
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v6i1.42

Abstract

Gastropods are a type of mollusk that can be found easily on mountain peaks up to the sea floors. Mollusk is considered the most successful invertebrates because it distributed a variety of habitats. Among the 80,000 species of Gastropods, about 1500 of which are found in Indonesia and its surroundings. This study aims to determine the level of gastropod diversity and the presence of gastropods at the Siklotok Waterfall and the Silangit Waterfalls at Purworejo, Central Java. Observations were carried out in triplicate between February to April 2018 using the observational research method, where the observation focused on 2 locations with different heights, 347 masl and 268 masl. The results show that the diversity of Gastropods found at Siklotok Waterfall from March to April 2018 found 193 individuals divided into 13 types of 9 orders and 9 families, while at Silangit Waterfall found 66 individuals divided into 4 types 3 orders and 3 families. The next fact is that the difference in environmental conditions such as altitude, temperature, pH and humidity affect the number of gastropods found, where the number of gastropods at Siklotok Waterfall is more than at Silangit Waterfall.
Diversity of Bivalvia in Estuarine of Suramadu Bridge of Surabaya Viola Atlanta; Reni Ambarwati; Mujiono Nova
Jurnal Moluska Indonesia Vol. 6 No. 1 (2022): April 2022
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v6i1.52

Abstract

The coast of the Suramadu Bridge is one of the important areas that has function as a route for transportation, recreation, as well as a protected area. However, the data of aquatic biota is rarely studied. One of them is bivalves. This research was conducted in February 2021 with the aim to analyze the diversity of bivalves in the Suramadu Coast. Observations and sampling were carried out in 3 transects 5 x 5 m based on different habitats. Five species of bivalves (Mimachlamys sanguinea, Anadara rhomboidalis, Tegillarca granosa, Barbatia trapezina, and Atrina pectinata) from three families (Pectinidae, Arcidae, and Pinnidae) were identified. The results of the community index show the individual distribution pattern and community stability in the medium category, there is a dominant species (Anadara rhomboidalis) but without significant differences in the number of individuals. This shows that the bivalves community is in a state of stress. A. rhomboidalis has the greatest role in the stability of the community, which can be seen from the value of the Important Value Index and the total volume of the shell. Recently, there are only two species that can be used sustainably, namely T. granosa and A. rhomboidalis.
Study of Correlation and Diversity of Gastropods at Mangrove Ecosystem in Payum Beach, Merauke Sendy Lely Merly; Reny Sianturi; Alfonsia Lusi Nini
Jurnal Moluska Indonesia Vol. 6 No. 1 (2022): April 2022
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v6i1.56

Abstract

This study had two aims, first was to determine the index of diversity, evenness, richness and dominance of gastropods species in the mangrove ecosystem, to assess the important value index of mangroves in the mangrove ecosystem, and the second one to understand the association of gastropods and mangrove in the mangrove ecosystem in Payum Beach, Merauke Regency. This research was conducted in September-October2021. This research using method of transect with a 100 m lenght of transect size. The research location devided into two station that are distinguished by the mangrove ecosystem to see the associated mollusc species. There were 8 species of gastropods that were analyzed including: Terebralia palustris, Terebralia semistriata, Telescopium telescopium, Cassidula angulifera, Cerithidea obstusa, Littorina intermedia, Littorina pallencens, and Littorina scabra. The diversity index (H’) of gastropods is 1,9370 so it is categorized as moderate, meanwhile the richness index (R) is 0,86 and the dominance (C) 0,16 both of these categorized as low, whilst inversely proportional to the evenness index (E) which shows the number 0,93 which means high evenness so that the community is stable. Furthermore, there are 3 types of mangroves namely Bruguirea cylindrica, Lumnitzera racemosa, dan Aegialitis annulata. Nonetheless, the relationship between the abundance of individuals of gastropods and the presence of mangroves at the research sites at station I and station II tended to be weak.
Research of Pearl Oyster Culture in Indonesia (2011-2021): A Bibliometric Analysis Dewi Syahidah
Jurnal Moluska Indonesia Vol. 6 No. 1 (2022): April 2022
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v6i1.57

Abstract

Pearl oyster is one type of mollusk that has great potential to be developed in several regions in Indonesia, such as West Papua, Maluku, Bali, and West Nusa Tenggara (NTB). The development of the marine and fisheries industry, including the pearl industry, is quite rapid, encouraging Indonesian scientists to conduct research and development related to the cultivation of the pearl oyster. To map the trend of pearl oyster research in Indonesia and the potential for further research, this paper explores research that has been carried out for ten years (2011-2021) based on the Google Scholar database through a bibliometric analysis, followed by visualization using the VOSviewer software. It was found that during the period, pearl oyster researchers were divided into 32 clusters and Cokrowati (4 documents) was the most dominating researcher in studying pearl oyster cultivation, followed by Ginting and Mukhlis (3 docs). The type of pearl oyster that has been most studied related to farming is pearl oyster (Pinctada maxima) and the penguin wing oyster shell (Pteria penguin). This study provides opportunities to develop research on both species.
Morphometric measurements of pearl shell shells Pinctada margaritifera for aquarium cultivation Torang J. P Silalahi; Cyska Lumenta
Jurnal Moluska Indonesia Vol. 6 No. 2 (2022): Oktober 2022
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v6i2.55

Abstract

The pearl oyster Pinctada margaritifera or the black-lipped oyster is one of the important species used in the pearl industry. The availability of natural pearl oyster seeds is limited, while exploitation is increasing. The purpose of this field work practice is to measure and observe the morphometric comparisons of Arakan, Mantehage Bango and Talengen waters. The time for the implementation of the field work practice begins in January 2020. This field work practice is carried out at the Mamuaya family work laboratory, Malalayang. The method used in this field work practice is a method of direct observation of the object being measured morphometrically. The morphometric measurements were processed using Microsoft Excel. Morphometric measurements of the shells of P. margaritifera were carried out by measuring the dimensions of the shells, namely shell length, shell height, shell hinge length and shell thickness. This shell measurement uses a digital vernier caliper caliper to make it easier to measure with an accuracy of 0.01 mm.Changes in the morphometric character of P. margaritifera shellfish based on different locations indicated that there were different environmental factors. This can be seen from the variation in size after the shell measurement process was carried out from three different locations. The location of Arakan waters has shellfish morphometric characters which tend to be larger than the samples of P. margaritifera in the waters of Mantehage Bango and Talengen. The shells of P. clams from Arakan waters have a shell size with a height of 169.77 mm in length, 183.78 in height, 113.11 in hinge length and 55.16 mm in thickness. The shell morphometric characters of P. margaritifera from Talengen waters varied with shell length 105.34 mm, shell height 116.34 mm, hinge length 66.41 mm, shell thickness 36.2 mm. The highest shell morphometric characters of P. margaritifera in Mantehage waters were obtained with a shell length of 111.35 mm, shell height 112.5 mm, shell hinge length 57.89 mm, and shell thickness 59.21 mm.
Morphometric Characteristics of Mangrove Snails (Telescopium telescopium) in the Mangunharjo Mangrove Forest, Semarang City Muhammad Adi Rizaldi; Sri Redjeki; Retno Hartati
Jurnal Moluska Indonesia Vol. 6 No. 2 (2022): Oktober 2022
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v6i2.60

Abstract

ABSTRACT Mangroves can play a role as in mollusk life cycles because the mangrove environment provides food. The gastropod species Telescopium telescopium is found in the mangrove forest of ​​Mangunharjo, Semarang City, Indonesia. Mangunharjo Village is an area that has experienced environmental degradation due to changes in land use. The reduction in ​​​​mangrove forests area will have an impact on T. telescopium survival and condition including shell shape and length. This study calculated the morphometric differences between T. telescopium populations based on environmental factors in the Mangunharjo mangrove forest. The study used a descriptive exploratory method with purposive sampling from November to December 2021. Water quality data collected simultaneously with T. telescopium sampling included temperature, salinity, pH and sediment substrate type. The results showed that the population abundance values ​​were 0.44 ind/ha (Station I), 0.18 ind/ha (Station II) and 0.21 ind/ha (Station III). Length weight relationship showed negative allometric (b < 3). T. telescopium sex ratio 1: 0.80. The T. telescopium shells were characterized by a round conical shape with a pointed and a brownish-black outer shell surface with a spiral lines and morphometric measurements (length, diameter, weight) rang from 3.58-9.51 cm, 1.51-4.43 cm and 3-69 g at Station I; 5.06-9.80 cm, 2.34-5.01 cm and 7-87 g at Station II; 3.7-9.97 cm, 1.93-5.01 cm and 5-87 g at Station III. The morphometric measurements of T. telescopium length ranges from 3.58-9.97 cm, diameter 1.51-5.01 cm and total weight 3-87 g, which is dominated by individuals with length classification in large category and class classification of diameter and total weight are included in the medium category.
Determination of Bivalves and Gastropods Found on Binasi Beach, Sorkam, Central Tapanuli Felix Situngkir; Delianis Pringgenies; Sri Sedjati
Jurnal Moluska Indonesia Vol. 6 No. 2 (2022): Oktober 2022
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v6i2.67

Abstract

Mollusks are the second largest invertebrate with a number of species reaching 50.000.  Mollusks have a soft body, some classes are covered with shells as a form of self-defense. Mollusks play an important role in ecosystems, where mollusks can be used as aquatic bioindicators. Gastropods and Bivalves are the largest class of Mollusks. Gastropods or snails, have a conical shell shape. Lives in subtidal waters that have muddy substrate. Bivalves or clams have two pieces of shell to protect their soft body, live in intertidal areas with sandy substrates. Binasi Beach is a tourist beach that has a white sand. The goal of this study was to determine the types of bivalve and gastropod found in Binasi Beach. The method used is descriptive analysis where the analysis is carried out according to the description in the field. The results of the analysis showed that two species of mollusks were found, they are Donax deltoides from the Bivalvia class and Turritella terebra from the Gastropod class. Donax deltoides has a convex symmetrical shell where the posterior is shorter than the anterior. The Umbo is not very prominent but can still be seen clearly. Donax deltoides was found 166 tails with a dominant shell length of 26-30 mm by 43.4%. Turriterlla terebra has a conical shell shape. Apex is the shell with the oldest age. Turritella terebra found 4 tails where the largest shell size has a length of 96 mm and a diameter of 18 mm.
Ex-Situ Conservation of Landsnail Asperitas trochus penidae and its unique life suryadinata suryadinata; Sunarjo Leman
Jurnal Moluska Indonesia Vol. 6 No. 2 (2022): Oktober 2022
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v6i2.68

Abstract

Conservation is one of the efforts to preserve the survival of animals whose population is likely to decrease or are threatened with extinction. Land snails of certain species are increasingly being found in the wild or in their natural habitat due to the decreasing condition of natural locations and also due to the rapid development of urban areas both for settlements and other infrastructure. Many certain species are no longer found in nature and may have become extinct. One way to preserve the life of land snails is to try to do conservation outside their natural habitat and find unique behavior that have not been revealed in research in their natural habitats. The research method was to conduct qualitative and quantitative observations by collecting data and observing 4 Asperitas trochus penidae which were kept in glass cages for more than a year and continued in open cages. During the research, it was found that Asperitas trochus penidae can live healthy in an open and artificial glass cage and can reproduce even if they are fed non-natural or artificial food. There are several important things to be learned during ex-situ conservation such as behavior during feeding, breeding and uniqueness that are missed when conducting research in the wild.
Antibacterial Activity Of Mollusc Symbiotic Bacteria From Mangrove Ecosystem In Jepara Against S. aureus, V. harveyi and V. alginolyticus Devi Oktavia Anjani; Barra Muzaffar Widayat; Otniel Kaleb Henry Sugiarto; Sunelsya Surya; Askiya Intan Suryani; Wilis Ari Setyati
Jurnal Moluska Indonesia Vol. 6 No. 2 (2022): Oktober 2022
Publisher : Masyarakat Moluska Indonesia

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Abstract

Vibriosis is a shrimp disease caused by Vibrio sp. and become an obstacle for shrimp farmer because it mass mortality in shrimp. On the other hand, mangrove ecosystem has a high biodiversity of biota, one of which is Gastropods, which are rich in unique symbiotic bacteria due to their filter feeding habits. The symbiont bacteria from Gastropods are assumed to be capable of being a source of bioactive materials with antimicrobial, cytotoxic, and antineoplastic activities that can be utilized in the fields of marine biotechnology and marine pharmacy. This study aims to determine the antibacterial activity of the Gastropod symbiont bacteria against Vibrio harveyi, Vibrio alginolyticus, and S. aureus. Antibacterial activity was tested by paper disc diffusion method using Gastropod symbiont bacteria isolate on Mueller Hinton Agar media with pathogen target Vibrio harveyi, Vibrio alginolyticus dan S. aureus. The isolate liquid culture was dripped on paper discs on MHA media which had previously been inoculated with pathogen target. Observation of the inhibition zone was carried out in a period of 1x24, 2x24, and 3x24 hours. The results showed that there were 7 potential isolates with antibacterial activity against S. aures, V. harveyi, and V. alginolyticus, namely isolates BK.51, BK.54, BK.63, SK.52, SK.53, SK.54, and SK.61. The antibacterial activity of the seven isolates was more effective against V. harveyi and V. alginolyticus than against S. aureus. It can be concluded that the mollusc symbiont bacteria are potential as antivibirosis agents

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