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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
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Search results for , issue "Vol. 7 No. 2 (2023): Oktober 2023" : 5 Documents clear
Temporal Variation of Growth and Condition Index of Clams (Corbicula fluminea) in The Lahumbuti River, Konawe, Southeast Sulawesi Bahtiar Bahtiar; Latifa Fekri; Muh. Ardin La Musa; Ulfi Damayanti; Muh. Fajar Purnama
Jurnal Moluska Indonesia Vol. 7 No. 2 (2023): Oktober 2023
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v7i2.83

Abstract

Corbicula fluminea in the Lahumbuti River have unknown growth, condition index and meat weight ratio. This study aims to determine the temporal variation of growth and condition index of clams in the Lahumbuti River, Konawe, Southeast Sulawesi. This research was conducted in August 2021-July 2022 on the Lahumbuti River, Konawe, Southeast Sulawesi. The clams were taken by purposive random sampling using a shovel in a 1x1 m2 quadrant. Furthermore, the width of the clam and the weight of wet meat sample was measured, using a caliper (0.5 mm) and a digital scale (0.01 g) at the Laboratory of faculty of Fisheries and Marine Science, Halu Oleo University. Furthermore, the clams were dried using an oven at 60oC for 48 hours and weighed using an analytical balance (0.0001 g). Data were analyzed descriptively quantitatively using a standard formula. The results showed that the average b value was 2.15 and the coefficient of determination (R2) was 5.18. The t test showed that mussels were in a negative allometric condition. The value of b varies temporally. The lowest b value was in October (1.60) and experienced an increase and reached a peak in February (3.0) with an R2 value ranging from 83.18 to 93.24. The condition factor was at a mean value of 2.54 ± 1.08 which ranged from 1.60 ± 0.54 to 3.58 ± 1.12. The highest condition index occurred in November (3.58) and the lowest occurred in April (1.60). In general, the clam condition index was in the lean category.
Community Structure And Spatial Distribution of Mollusc in Southernt Part Of Leitimur Coastal Waters, Ambon City yuliana natan; Juliaeta Adriana Bertha Mamesah; Tiara.Sanla Wattimury
Jurnal Moluska Indonesia Vol. 7 No. 2 (2023): Oktober 2023
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v7i2.86

Abstract

A resource that is often used by the coastal communities of South Leitimur, Ambon City to fulfill their daily needs is mollusks. The community has long been utilizing the resources of mollusks (Bivalves and Gastropods), which are taken at low tide (bameti) to meet their daily needs as a substitute for animal protein other than fish. The existence of protected and economically valuable species and then with continuous community activities, without being balanced with knowledge of the importance of resource conservation will result in the vulnerability of the existence of these mollusc resources to degradation. Information on the existence of molluscs and their distribution is needed to support fisheries management. The results showed that the coastal areas of South Leitimur District (Rutong, Hukurila and Leahari) had 94 species of mollusks, belonging to 2 classes, 9 orders, 33 families and 52 generas. The density values ranged from 0.003 ind / m2 - 4.99 ind / m2, while the frequency of presence values ranged from 0.003 - 0.5. The highest potential value of mollusk species is in the coastal of Negeri Rutong and the lowest is in the coastal of Negeri Hukurila. The diversity index value is moderate, with the evenesse index value that is classified as high. The dominance index value shows that there is no dominance of certain species. From various distribution patterns, as many as 103 species of molluscs were clumps, 40 species uniformly and two species randomly. Keywords: Community structure, spatial distribution, Mollusc, South Leitimur
Structure Community of Gastropods and Bivalves in Sabang Coastal Chitra Octavina; Muhammad Irham; Dwi Zhahira Feriska
Jurnal Moluska Indonesia Vol. 7 No. 2 (2023): Oktober 2023
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v7i2.89

Abstract

The wealth of marine life in the waters of Sabang City is very diverse that inhabits these waters. One organism or biota that is known to have an important role, both ecologically and environmentally, is thegroup of oluska from class Gastropods and bivalves. The purpose of the study is to determine the structure of the community through the formula approach of density, distribution patterns, diversity, uniformity, and dominance. Determination of location using pupossive sampling, sampling is carried out in two stages, namely taking aquatic parameters and sampling Gastropoda and Bivalves. The results of research at three observation stations in the Sabang water area which coincided on the coast of Anoi Itam, and Lhok Weng waters, found 19 species of Gastropda consisting of 10 families and 2 species of Bivalves consisting of 2 families. The highest gastropod density is found at station II of 8 ind/m2. The distribution pattern of 10 species is clustered and 9 species are uniform. The diversity value (H') of high criteria ranges from 1.14 – 1.40, the uniformity value (E) is balanced ranging from 0.63 – 0.81, the dominance value (C) ranges from 0.39 – 0.53. The highest density of Bivalves is found at station II at 0.69 ind/m2. The distribution pattern of 2 species is uniform. The diversity value (H') of the low category ranges from 0 - 0.09, the uniformity value (E) is unbalanced ranges from 0 - 0.07, and the dominance value (C) ranges from 0 - 0.95. The structure of the Gastropoda and Bivalve Community in Sabang Waters is in stable condition because there is no species that dominates the most
Utilization Different Macroalgae to Enhance Growth and Survival Rate of Juvenile Abalone, Haliotis squamata: Chrisoetanto P Pattirane; Aripudin; Asep Suryana; Herlin Kawati
Jurnal Moluska Indonesia Vol. 7 No. 2 (2023): Oktober 2023
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v7i2.92

Abstract

As a herbivorous organism, abalone is highly dependent on the availability of macroalgae as its main feed. The types of macroalgae commonly used as abalone feed are Ulva sp (green algae) and Gracilaria sp (red algae). The use of brown algae is still very rare so further research needs to be done. This research was conducted at the Superior Shrimp and fishery production center (BPIU2K) in Bali. The rearing tank used is a fiber tub measuring 200x100x60 cm3. The rearing container used is a plastic basket measuring 40x30x10 cm3. The baskets used were nine pieces, including three baskets each for Gracilaria sp. (pink color), Ulva sp. (blue color), and Padina sp. (green color). The stocking was carried out in the morning by as many as 216 individuals with a stocking density of 2 ind/L/basket. The average size of the shell length is 3.1 cm and the average weight is 6.04 g. Feeding is done once every two days ad-libitum, among other types of Gracilaria sp., Ulva sp., and Padina sp. Observation of water quality is carried out every day including temperature, DO, salinity, and pH. The siphoning of the bottom of the container is carried out every two days. Juvenile abalone maintenance is done by using a completely randomized design (RAL) consisting of three feed treatments namely Gracilaria sp. (A1), Ulva sp. (A2), and Padina sp. (A3), and repeated three times. The ANOVA results of abalone juvenile growth showed no statistically different values (P>0.05) but visually visible differences. The length and width of the shell of juvenile abalone fed Gracillaria sp., Ulva sp., and Padina sp. respectively, 4.1 cm and 2.6 cm; 4.0 cm and 2.4 cm; 3.8 cm and 2.3 cm. Weight of abalone juveniles respectively 12.50 g (Gracillaria sp.), 10.83 g (Ulva sp.), and 9.20 g (Padina sp.). Juveniles fed Gracilaria sp. and Ulva sp. showed 100% survival while juveniles fed Padina sp., it has a survival rate of 98.61%.
Rediscovery of the tree snail Bulimus appressus von Martens, 1867, with Bulimus perversus tener von Martens, 1867 placed as subspecies of Amphidromus palaceus (Mousson, 1848) (Gastropoda: Camaenidae) Bunjamin Dharma; Irwan Wipranata
Jurnal Moluska Indonesia Vol. 7 No. 2 (2023): Oktober 2023
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v7i2.95

Abstract

Bulimus appressus von Martens, 1867 was described without shell image with the type locality "Java". In 1890, Boettger placed it under the genus Amphidromus Albers, 1850 as Amphidromus appressus (Von Martens, 1867); then Fulton, 1896 placed it as a variety of Amphidromus palaceus (Mousson, 1848). This variety status was followed by Pilsbry, 1900; Van Benthem Jutting, 1950; and Laidlaw & Solem, 1961. It was allegedly extinct, until the second author rediscovered several specimens in Cipayung, Bogor, West Java in April 2022. The shape of the shell is elongated, the spire is slightly tapered, the aperture is small, monochrome yellow or white in colour, without varices, and the sutures are appressed; based on these characteristics this variety is placed as a subspecies of Amphidromus palaceus (Mousson, 1848) as Amphidromus palaceus appressus (von Martens, 1867). Three specimens are deposited in MZB, Cibinong, Bogor, Indonesia. It is compared to the nominate subspecies Amphidromus palaceus palaceus (Mousson, 1848) and to Amphidromus toncruzi Dharma, 2012 from the Philippines whose suture of the last whorl is appressed to the penultimate whorl for 1.5 mm. This paper also discusses Bulimus perversus tener von Martens, 1867 from Mount Gedeh (Gede), West Java (van Benthem Jutting, 1950); the shell is small, relatively thin with a slightly tapered spire, monochrome light yellow in colour, without varices. Herein also this taxon is placed as subspecies of Amphidromus palaceus (Mousson, 1848), that is Amphidromus palaceus tener (von Martens, 1867). Compared with the nominate subspecies that has medium shell thickness and slightly convex spire.

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