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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 5 Documents
 1 
Search results for , issue "Vol. 6 No. 2 (2022): Oktober 2022" : 5 Documents clear
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

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

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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