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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. 8 No. 1 (2024): April 2024" : 5 Documents clear
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.

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