Recent Submissions

  • Growth and survival of milkfish (Chanos chanos), tiger prawns (Panaeus monodon), and oysters (Crassostrea sp.) in integrated multi-trophic aquaculture (IMTA) system with varying stocking densities.

    Andika, Maulana; Muliani, Muliani; Khalil, Munawar; Department of Marine Science, Universitas Malikusaleh (2024-03)
    Journal of Marine Studies
    Integrated Multitrophic Aquaculture System (IMTA) is a sustainable approach to aquaculture, utilizing ecosystem dynamics by integrating various species. This study examined the growth and survival of milkfish (Chanos chanos), tiger shrimp (Penaeus monodon), and oysters (Crassostrea spp.) in IMTA systems with different stocking densities. A 30-day experiment using a nonfactorial-completely randomized design with four treatments and three replications was conducted. The results showed that the implementation of IMTA had no significant impact on the survival rate of milkfish, tiger prawns or oysters in all treatments. However, important variations in growth parameters were observed. Milkfish and tiger prawns showed the highest weight and length gain in treatment B, followed by treatments A, C, and D. Similarly, oysters showed optimal growth in treatment B, followed by A, C, and D, based on weight gain, length, width, and shell thickness. Throughout the study, the physicochemical parameters of the water remained within acceptable ranges, thus supporting ideal growth conditions for the cultured species. These findings underscore the potential of IMTA to increase aquaculture productivity while upholding the principles of environmental sustainability. By optimizing stocking density and encouraging species diversity, IMTA presents a promising avenue for advancing integrated aquaculture practices, in line with the FAO's blue economy concept and ecosystem approach to aquaculture. Future research should concentrate on refining the IMTA system and evaluating its long-term ecological and economic consequences.
  • Bioecological characteristics of mangrove snail in Langsa mangrove forest, Aceh, Indonesia: Diversity and community structure.

    Mardiah, Nur Ainun; Erlangga, Erlangga; Syahrial, Syahrial; Hadinata, Fitra Wira; Ezraneti, Riri; Barat, Welmar Olfan Basten; Leni, Yusyam; Department of Marine Science, Universitas Malikusaleh (2024-03)
    Journal of Marine Studies
    The most crucial aspect of managing an ecosystem or habitat is knowledge about accompanying biota, such as snails. The research on mangrove snails in the KPH Region III Aceh City of Langsa area was conducted in November 2021 with the goal of evaluating species diversity, density, ecological index, distribution, and their link to surrounding environmental conditions. Snail data was obtained via quadrat transects, with observation stations established using purposive sampling.The snail diversity was found to be five species from four families, with the highest density found in N. planospira (03.13 ind/m2). The diversity index was low (H' ≤ 2.0), dominance was moderate (0.5 < C ≤ 0.75), and uniformity tended to be balanced (0.5 < E ≤ 0.75). The distribution pattern is clustered (Iδ> 1), with C. cingulata being abundant (83.33%), and C. capucinus being frequently found (50.00%), N. planospiraonly found occasionally (36.11%), and L. scabra and T. telescopium are relatively uncommon (11.11% and 0.56%, respectively), with a link to environmental variables indicating that T. telescopium prefers fine mud substrates. Meanwhile, C. cingulata, C. capucinus, L. scabra, and N. planospiralive in habitats with fine mud substrates that are more solid than T. telescopium’s habitats.
  • Quantitative analysis of water quality parameters and their influence on the Pacific white shrimp (Litopenaeus vannamei) culture: A case study of Rancong mariculture area in Lhokseumawe, Aceh, Indonesia.

    Yessy, Lailan Try; Ezraneti, Riri; Khalil, Munawar; Department of Marine Science, Universitas Malikusaleh (2024-03)
    Journal of Marine Studies
    Water quality is one of several aspects that affect the success of aquaculture business. This study analyzes water quality and assesses its impact on aquaculture enterprises in the Rancong pond region of Lhokseumawe City. The study ran from November to December 2018. The water quality of the Rancong pond was sampled directly and tested in multiple labs. The field survey and purposive sampling strategy separated the research location into four stations with three water sampling points. Temperature, salinity, turbidity, brightness, pH, dissolved oxygen, alkalinity, total organic matter, BOD5, total ammonia nitrogen, nitrite, nitrate, phosphate, lead (Pb), total Vibrio bacteria, total general bacteria, and phytoplankton types and abundance were measured. The suitability of water quality is assessed using descriptive analysis, scoring, and matching. The investigation indicates that the quality and maintenance of the source water are highly suitable (S1). Traditional vannamei shrimp ponds in Rancong, Lhokseumawe City, should be maintained as fisheries cultivation areas.
  • Ecological characteristic of hermit crabs in Lhokseumawe mangrove forest, Aceh, Indonesia

    Fitriani, Fitriani; Erlangga, Erlangga; Syahrial, Syahrial; Ezraneti, Riri; Department of Marine Science, Universitas Malikusaleh (2024-03)
    Journal of Marine Studies
    The study was conducted between August and September of 2021 in order to determine the density, ecological index, distribution pattern, geographic distribution, environmental factors, and the relationship between hermit crabs and environmental factors. Hermit crabs were gathered using a quadratic transect and sample plots, while environmental variables were measured in situ. PCA and CCA multivariate statistics were used to determine the characteristics and correlation between hermit crabs and environmental factors. Hermit crabs were discovered to be comprised of two species (Clibanariuslongitarsus and C. infraspinatus) and one family (Diogenidae), with the highest density found in the C. longitarsus species (1.22 ± 0.57 – 4.68 3.53 ind/m2), diversity index is categorized as moderate (2.01), the geographical distribution is abundant (>80%), and environmental factors are categorized as good. In addition, Stations I and II have high DO, TOM, mangrove density, C. longitarsus, and C. infraspinatus parameters, whereas Station III has high salinity, pH, and temperature, with salinity, mangrove density, and TOM being the most influential parameters on hermit crab density.
  • Rehabilitasi ekosistem padang lamun

    Rochmady, R.; Sekolah Tinggi Ilmu Pertanian Wuna Raha, Sulawesi Tenggara 93600, Indonesia (Program Pascasarjana, Universitas Hasanuddin, Makassar, 2010-09-29)
    Ekosistem pesisir dan laut merupakan ekosistem alamiah yang produktif, unik dan mempunyai nilai ekologis dan ekonomis yang tinggi. Selain menghasilkan bahan dasar untuk pemenuhan kebutuhan pangan, keperluan rumah tangga dan industri yang dalam konteks ekonomi bernilai komersial tinggi, ekosistem pesisir dan laut juga memiliki fungsi-fungsi ekologis penting, antara lain sebagai penyedia nutrien, sebagai tempat pemijahan, tempat pengasuhan dan tumbuh besar, serta tempat mencari makanan bagi beragam biota laut.(Coastal and marine ecosystems are natural ecosystems that are productive, unique and have high ecological and economic value. In addition to producing basic materials for the fulfillment of food needs, household and industrial needs which in the context of high-value commercial economy, coastal and marine ecosystems also have important ecological functions, such as providers of nutrients, as spawning, nurturing and growing, as well as where to find food for a variety of marine biota.)
  • Kepadatan kerang lumpur Anodontia edentula Linnaeus, 1758 kaitannya dengan parameter lingkungan di Kabupaten Muna

    Rochmady, R; Omar, Sharifuddin Bin Andy; Tandipayuk, Lodewyck S.; Sekolah Tinggi Ilmu Pertanian Wuna Raha, Sulawesi Tenggara 93600, Indonesia; Universitas Hasanuddin, Makassar, Indonesia; Universitas Hasanuddin, Makassar, Indonesia (2016-05-09)
    The research aims to analyze the density of mud clams Anodintia edentula Linnaeus, 1758 relation to environmental parameters, covering organic material content and composition of sediment in Muna regency. Research carried out in coastal Lambiku and Tobea Island. The sample collection begins in March until May 2011, intervals collection example once a month for three months. A collection of mud clams example in a plot trasek (Line Transect Plot) is determined (purposive sampling). A plot observation based on three categories, Plot I near coast, Plot II the transition and Plot III far from the beach, intervals 50m each a plot observation. Analysis data the density use Krebs (1978) formula, relations of density and environmental parameters use corelation and descriptif analysis. The research results show that the density is different of mud clams between Tobea Island and coastal Lambiku. The density of mud clams on the Tobea Island have higher is 33 ind m-2 or 29-40 ind m-2. While density of mud clams in coast Lambiku is 10 ind m-2 or 8-11 ind m-2. The density of mud clams far from the beach between the coastal areas relatively different. While composition sediment and the organic matter on Tobea Island and coastal Lambiku relatively is the same. Phosphates and sulphur concentration on the Tobea island each of 13,90 ppm and 15,76 ppm. Phosphates and sulphur concentration in coastal Lambiku each of 14,55 ppm and 17,01 ppm. Phosphate and sulfur concentrate far from shore show organic material content of sulphur and phosphates is high with density mud clams.
  • Struktur dan komposisi jenis mangrove Desa Bonea dan Kodiri, Kabupaten Muna, Sulawesi Tenggara

    Rochmady, R; Sekolah Tinggi Ilmu Pertanian Wuna Raha, Sulawesi Tenggara 93600, Indonesia (2015-10-19)
    The condition of mangrove ecosystem in Kodiri village is in good condition, because the management effort has been done by indigenous community self-supporting. Mangrove in the village of Bonea classified as damaged, due to the high utilization rate, especially the taking of firewood. The research aimed to analyze the structure and composition of mangrove vegetation in Bonea village, Lasalepa district and Kodiri village, Lohia district. Relative density parameters, relative closure, relative closure type and Important Value Index (INP) are used as indicators to describe the structure and composition of mangrove vegetation. The study was conducted from June to December 2014 located on the coast of Bonea village and Kodiri village. Data analysis was conducted at STIP Wuna Raha Fisheries Laboratory. Observation of mangrove vegetation using the method of line transect and 3 (three) observation points at each location. The point of observation was determined purposively, based on the representation of the mangrove vegetation pattern studied, so there were 6 lines and 18 observation plots at two locations. The data of mangrove vegetation were analyzed descriptively-qualitative. Result of research, found mangrove vegetation in Bonea village dominated Ceriops tagal and Rhizophora apiculata. The relative closure of the type of category is broken and the density of this type of category is rare. Vegetation of mangroves Kodiri village dominated Rhizophora apiculata, Soneratia alba, Bruguera sexangula, Rhizophora stylosa, Soneratia caseolaris, Bruguera gymnorhiza, and Avicenia marina. The relative closing value of both category types and the relative density of this type of category are rare.
  • Aspek bioekologi kerang lumpur Anodontia edentula (Linnaeus, 1758) (Bivalvia: Lucinidae) di perairan pesisir Kabupaten Muna

    Rochmady, R (Universitas Hasanuddin, Fisheries Sciences, 2011-08-05)
    The study was conducted in Tobea Island and coastal Lambiku for analysis: 1) biology aspects, 2) environmental aspects. Data were analysed to see the difference in the two locations using t-test analysis (student) and descriptive. The analysis showed that mangrove ecosystems in Tobea island, the closure of the (51%) and density (1.000 trees ha-1), in coastal Lambiku close (43%) and density (944 trees ha-1). Biological aspects of the growth population of mudclams in the Tobea Island (L∞= 65.6 mm, K= 1.18) lower than in coastal Lambiku (L∞= 73,75 mm, K= 0.73). Results of the t-test (student), morphometric characters of mudclams in Tobea Island and coastal Lambiku significantly different. The length-weight relationship of mudclams of sex male and female in the Tobea Island and coastal Lambiku positive allometric (b ≠ 3). Relative condition factor and sex ratio of mudclams in Tobea Island, significantly different between male and female in coastal Lambiku. The size of the first measure of mature gonads of mudclams in Tobea Island (average of 39,62 mm ranges of 39,20 - 40,04 mm) is lower than in coastal Lambiku (average of 39,58 mm, range of 39,21 - 39,96 mm). The density of mudclams of the Tobea Island (the highest 48 ind m-2, the lowest of the 21 ind m-2) is greater than coastal Lambiku (the highest 15.67 ind m-2, the lowest 5,67 ind m-2). Bioecologycal aspects of mudclams in Tobea Island affected by organic carbon and phosphate. While in coastal Lambiku affected by nitrogen and sulphur by both the growth and density.
  • Perbandingan karakter morfometrik kerang lumpur Anodontia edentula, Linnaeus 1758 di pulau Tobea dan pesisir Lambiku, Kecamatan Napabalano, Kabupaten Muna

    Rochmady, R; Omar, Sharifuddin Bin Andy; Tandipayuk, Lodewyck S. (2011)
    The objective of the research was to aim the morphometric characters of mudclams, Anodontia edentula Linnaeus, 1758 in Tobea Island and in the coast of Lambiku, Napabalano District of Muna Regency. The research carried out in Tobea Island and in the coast of Lambiku was to analyse morphometrics character of mudclams. Data were analysed to perceive the comparison of morphometrics characters of mudclams in Tobea Island and in the coast of Lambiku by using t-test (student) and descriptive analysis. The results of t-test (student) analysis showed morphometric characters of mudclams in Tobea Island and in the coast of Lambiku significantly different as indicated by the t-value is greater than t-tables at the confidence level (=0.05). The morphometric characters of mudclams between the male sex in Tobea island and male in the coast of Lambiku different significantly as indicated by the t-value is greater than t-tables at the convidence level (=0.05). The morphometric characters of mudclams at the confidence level at the male sex in Tobea Island and female in the coast of Lambiku significantly different as indicated by the t-value is greater than t-table. For morphometric characters mudclams in Tobea Island of female and male sex significantly different in the coast of Lambiku as indicated by the t-value is greater than t-table. Morphometric characters in female of mudclams in Tobea Island and female gender were significantly different in the coast of Lambiku. Morphometric characters of mudclams in Tobea Island tend to be smaller than in the coast of Lambiku which the mudclams there tends to be larger.