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ILMU KELAUTAN: Indonesian Journal of Marine Sciences

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Published by Universitas Diponegoro

ISSN : 08537291 EISSN : 24067598 DOI : -

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Earth & Planetary Sciences

ILMU KELAUTAN: Indonesian Journal of Marine Sciences (IJMS) is dedicated to published highest quality of research papers and review on all aspects of marine biology, marine conservation, marine culture, marine geology and oceanography.

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Articles 743 Documents

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Domestication of Red Seaweed (Gelidium latifolium) in Different Culture Media Andri Wijayanto; Ita Widowati; Tjahjo Winanto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 1 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Gelidium latifolium is one of red seaweed types potentially can be developed as an industrial raw material. Since Gelidium is currently taken from ocean, the availability of seaweed from aquaculture is necessary to overcome the small number of its availability in nature. In Indonesia, G. latifolium cultivation has not been carried out so that domestication is required. The use of macro and micro nutrients in growth media is essentially needed for the domestication process. Domestication requires fast media and place for growth. The purpose of this study is to determine the growth of biomass and the survival of G. latifolium in different culture media. The study was conducted in a semi-outdoor research laboratory. The method used in this research is laboratory experimental method and Completely Randomized Design (CRD) with the treatment applied using 3 types of culture media (Urea: Za: TSP) by comparison (A) 100: 50: 50% (2 g.L-1), (B) 75: 75: 50% (2 g.L-1) and (C) 75: 50: 75% (2 g.L-1), with 3 replications. The seaweed was kept in 10 L of water in aeration equipped aquarium and filled with 10 g of G. latifolium on each treatment. The best growth rate of G. latifolium biomass is 5.67± 0.58 g and 100±0% are survived in C culture medium with a concentration of 75% Urea: 50% ZA: 75% TSP (2 g.L-1).

Biometric Indices and Condition factors of Pomadasys jubelini (Cuvier, 1830) from Obuama Creek, Nigeria Olaniyi Alaba Olopade; Henry Eyina Dienye; Cynthia Chigazu Okonkwo
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 2 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Biometric indices of Pomadasys jubelini from Obuama Creek, Rivers state, Nigeria were investigated using length frequency distributions (LFDs), length-weight relationships (LWRs), length-length relationships (LLRs), condition factors (allometric, KA, Fulton’s, KF and relative, KR). Specimens were captured in a stretch of the creek from March to September 2019. A total of 229 specimens were examined with the total length (TL) and weight (W) ranging from 8.7 to 50.4 cm and 8.7 to 834.5 g respectively. The standard length (SL) ranged from 5.3 to 46.8 cm, fork length (FL) was between 6.5 to 48.7 cm and the girth length (GL) varied from 4.7 to 38.7 cm. The relationships of weight-length showed a negative allometric growth pattern with a value of "b" of 2,666. Fulton's condition factor (KF) ranged from 0.10 to 5.45, with an average of 1.21±0.66 indicating perfect wellbeing for the species. The LLR's allometric coefficient ' b ' between TL vs. FL and TL vs. GL showed positive allometric growth, while SL vs. FL, SL vs. TL, SL vs. GL, and GL vs. TL showed negative allometric growth, although the values were close to 1. These findings also provided some new and updated information on some of the morphometric characters of Pomadasys jubelini in Obuama Creek that could be useful for fisheries management and fish species protection measures in the creek and adjacent habitats.

Health Status of Coral Reef in Tunda Island, Banten Province, Indonesia Mujiyanto Mujiyanto; Mheda G. Garcia; Joni Haryadi; Risnawati Rahayu; R. Arif Budikusuma
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 2 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Coral reef is an important underwater ecosystem supporting people’s lives in coastal areas. One of the communities depending on the coral reef ecosystem for its food, livelihood, shoreline protection, and recreation needs is a community in Tunda Island. This research aims to analyze and determine the health status of coral reef in the island using a survey method. It was conducted in July 2018 and July 2019. Underwater photography transects were established at two depth areas of ± 3-4 m (shallow water) and ± 10-11 m (reef slope). Analysis of the results of live coral cover was divided into eight categories of groups based on CPCe output series 4.1. The values of coral reef cover at first depth (± 3-4 m) were 64.86% (east side of the island), 55.76% (north toward east side), and 32.22% (west side). The values of coral reef cover at second depth (± 10-11 m) were 36.36%, 25.00%, and 23.63% on the north toward east, east, and central north sides of the island, respectively. In shallow waters of Tunda Island, the coral reef health is classified as moderate to good, mostly those located on the east and the north toward the east sides. At reef slope, the coral reef health is classified as damaged to poor, particularly those located on the south and the south toward the west sides. The difference in the health values implies that most corals occur in shallow waters while deep corals differ from those near the surface and are not safe from impacts of the activities in the coastal area of Tunda Island.

Characteristics of Liquid Product of Alkaline Treated Sargassum polycystum C.A. Agardh. from Lange Beach, Aceh Anjar Purba Asmara; Endaruji Sedyadi; Ilma Fistannisa Zette
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 2 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Sargassum is known to have potential ingredients, such as essential nutrients and minerals, which are important for agroindustry and the environment. This study aims to determine the proximate properties of Sargassum polycystum C.A. Agardh from Lange beach and the optimum extraction period arising the liquid product. The dried seaweed was extracted using 0.1% KOH at a constant temperature of 80°C for 120–600 mins. Furthermore, nutrients content, pH, electrical conductivity (EC) and total dissolved solids (TDS) of the afforded filtrate were quantified. As a result, the moisture, ash, fibre, carbohydrate, protein, and fat content were 7.16, 13.057, 20.33, 51.77, 6.12, and 1.57%, respectively. The value of pH, EC, and TDS ranged around 4.69–7.27, 0.013–0.078 dS.m-1, and 6.24–39.75 mg.L-1, respectively. The level of N, P, K, and organic C, were estimated around 0.30–0.81, 0.16–0.28, 0.15–0.20, and 0.32–0.80%, respectively. Meanwhile, the content of Na, Mg, Ca, Fe, Mn, and Zn were observed from 112.04–212.61, 24.60–33.57, 146.59–280.92, 416.22–630.69, 18.25–27.73, and 19.86–26.53 ppm, respectively. In conclusion, extraction for 120 mins seems to be preferable, as the observed parameters were above the minimum range.

Survival Rate, Growth And Chemical Content of Dendronereis pinnaticirris (Polychaeta, Nereidae) In Maintenance With Different Food And Substrate Eko Setio Wibowo; Edy Yuwono; Purnama Sukardi; Asrul Sahri Siregar
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 2 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

The worm Dendronereis pinnaticirris is used as feed of shrimp broodstock in a hatchery, mainly because of its availability in the local market, and its nutritional content required for improving gonad maturation and post larvae production. The important economic value of the worm and the increasing demand for feed in shrimp hatcheries have led to an intense exploitation that suppers its population and the sustainability of the whole estuarine ecosystem. The study, which represents the starting point of large-scale production of the polychaete worm by culture in the artificial system, shall be undertaken. Accordingly, a production study using D. pinnaticirris juvenile was carried out under controlled conditions fed with two different feed (feed contains mainly plant protein and animal protein, respectively), and kept in three different substrates (substrate consists of mud and 8.78%, 37.34%, 39.17% sand, respectively). The treatments were arranged according to randomized completely block design in 8 (eight) replicates. The survival rate, body weight increment and growth, oxygen consumption, proximate body chemical, and fatty acid contents were measured. The results showed that growth and oxygen consumption was significantly influenced by a substrate and feed type (P<0.05). Worms on the mud substrate with 39.17% sand, and feed containing vegetable protein showed the highest oxygen consumption. Survival rate and chemical body content were not significantly influenced by the type of substrate and feed (P<0.05). The protein content of the worm was 32.02-43.81%, while fat content was 2.41-9.89%. Twenty different fatty acids were identified in the worm of all treatment groups.

Relationship Between Species Composition of Butterflyfishes and Coral Cover (Study case: Taka Bonerate National Park) Ana Faricha; Isa N. Edrus; Sasanti R. Suharti; Rizkie S. Utama; Agus Budiyanto; Abdullah Salatalohi; Suyarso Suyarso
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 3 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.25.3.121-126

The coral reef environment has a strong influence on associated organisms such as fishes, mollusks, and others. Wherein, the butterflyfishes are marine fishes which closely associated with the tropic group as dietary specialization i.e. obligate coral feeder, facultative, and generalist. The obligate may respond only to change in preferred corals and not indicate others. However, generalist show in different response in habitat deteriorates and may allow switching feeding to a less preferred one. Many questions remain about food specific at the species level which may potentially as bio-indicator for coral conditions. Here, we studied the species composition among coral coverage. We explore the environmental degradation in Taka Bonerate National Park impact on food resources and fishes especially for butterflyfishes community. This study focused on family Chaetodontidae with UVC method and UPT method for coral cover. This study was carried out at Taka Bonerate National Park, South Sulawesi between May and June 2019. There were 342 individuals observed and dominated by Chaetodon kleinii, Hemitaurichthys polylepis, Heniochus chrysostomus, C. lunulatus, C. melannotus, C punctatofasciatus, and Forcipiger flavissimus. However, we found a site with diversity index and coral cover has across conditions. Whilst, these benthic communities mostly dominated by Acropora, which may be preferenced by specific species. Butterflyfishes have several types of foraging tasks and may impact in utilizing the coral reef and other social habitats used. The species composition and abundance of butterflyfishes had relations not only by coral coverage but also benthic compositions. However, factors that regulate its specific species distribution and species compositions are still under study.

Masculinization of Tropical Eel Anguilla bicolor McClelland in Different Population Density Farida Nur Rachmawati; Yulia Sistina
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 3 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.25.3.97-102

In general, female eel dominates the results of catching eel in the river. Male fish dare rarely found in nature, therefore masculinization is necessary for obtaining in males. The administration of 17α-methyltestosterone to masculinize Anguilla bicolor McClelland. It is a synthetic anabolic-androgenic steroid which has potential to endocrine disrupter that disturbed function of normal reproduction in human or animal. It urgently needed that a masculinization technique needs to study the use of an environmental factor. Population density is one of the environmental factors that influence gender determination (ESD-environmental dependent sex determination). This will result in increased cortisol secretion, which will further stimulate the synthesis of 11-KT steroids that affect male gonad differentiation. This study aims to induce masculinization in tropical eel Anguilla bicolor McClelland in different density. Three treatments and three replicates conducted the research. The treatments were one fish.48 L-1, two fish.48 L-1 and three fish.48 L-1. Eels size was approximately similar, at 16,78 g±0,62 in weight, and 25,38 cm±0,15 in length were either culture in brackish water for eight weeks. The results showed that density population treatment significantly increased the Fin Index (P<0.05), but no sign for Eye Index, GSI, HSI, and testosterone level. The highest male population (77,8%) achieves at the highest density treatment, three fish.48 L-1 population density. It can be concluded, based on reproductive observations, population density does not affect gonad maturity/puberty, but the high population density (3 fish.48 L-1)stimulates Anguilla bicolor McClelland masculinization.

Growth Characteristics Layur Fish Lepturacanthus savala in Juata Waters, Tarakan, Indonesia Agus Indarjo; Gazali Salim; Fahrizal Amir; Supriadi Supriadi; Permana Ari Soejarwo; Christine Dyta Nugraeni; Lukman Yudho Prakoso; Ambariyanto Ambariyanto; Muhammad Firdaus; Julian Ransangan
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 3 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.25.3.127-134

The city of Tarakan, Indonesia, benefits economically from abundant marine biological resources, one of which is the layur fish, known commercially as ribbonfish. The purpose of this study was to analyze the growth character of the layur fish (Lepturacanthus savala) obtained from the juata waters of Tarakan City. The method of this quantitative and descriptive study was to analyze the growth of layur fish Lepturacanthus savala in the Juata waters off the coast from the city of Tarakan. Body shape, length, weight, and ratio sex data were collected from sites selected by the purposive sampling method based on trawl fishing catch. Secondary data, collected from interviews of fishing personnel, included the number of catches using trawling gear and trawl fishing location. The length ranges of male from 20,4 to 54,0 cm with an average length of 37,2±16.8 cm (n = 255) and the length ranges of female from 20,5 to 68 cm with an average length of 44,25±23.75 cm (n = 275). The results showed that maximum length of male layur fish was smaller than the maximum length of female fish, which were 59.352 cm at 267 d and 72.638 cm at 315 d, respectively. The result shows a negative allometric growth pattern male and female layur fish was found to be the same and sex ratio of male to female has a ratio of 1,0: 1,8 with a percentage of males at 48.11% and females at 51.89%. The majority of male and female fish exhibited a thin body shape (51,4% of male and 52% of female).

Effectivity of Holothuria scabra and Spirulina platensis extract combination as an Antiinflammatory Agent Measured by Carrageenan-induced Rat Paw Edema Renni Yuniati; Bambang Sulardiono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 3 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.25.3.103-109

Sea cucumber, Holothuria scabra, can be found abundantly in Indonesian seas, which is also known to possess several medicinal properties. Spirulina platensis is another marine resources that has recently been extensively researched for its medicinal ability, such as anti-inflammatory effect. This study aims to evaluate the efficacy of H. scabra extract combined with S. platensis extract in reducing inflammation. This study uses male Wistar rats as the study animal. Inflammation was induced by injecting carrageenan solution into the mice paw. Combination of H. scabra and S. platensis extract with various combination ratio (1:1; 1:2; and 2:1) was applied to the mice paw. Diclofenac sodium was used as the standard control therapy. Edema inhibition rate and anti-inflammatory efficacy were measured by analyzing the edema size and calculating the edema difference. Combination of H. scabra and S. platensis with 1:1 ratio has the largest edema inhibition volume compared to the other treatments. H. scabra and S. platensis combination outperforms the positive diclofenac sodium control group in terms of edema inhibition. The highest anti-inflammatory effect is obtained in the combination of H. scabra and S. platensis with 1:2 ratio, however, the anti-inflammatory efficacy is not as potent as the positive control. The effectivity of Holothuria scabra and Spirulina platensis extract in reducing the edema might be caused by their ability to reduce the levels of several inflammatory markers, including IL-6, NO, MMP9, and COX-2. This result suggests that H. scabra and S. platensis combination has anti-inflammatory effect shown in mice paw edema model.

Utilization of Trash Fish for Cultivation of Crablet Mud Crab (Scylla serrata) Heppi Iromo; Dori Rachmawani; Abdul Jabarsyah; Zainuddin Zainuddin
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 3 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.25.3.110-114

The high demand for mud crabs in North Kalimantan causes catch to increase in the wild. If it is not balanced with efforts to increase its aquaculture of mud crab, in the future there will be a decline in population. This study aims to determine the growth and survival rate of mud crab seed (crablet, Scylla serrata) in the application method of different types of trash fish. This research used a completely randomized design with 4 treatments and 3 replications. The Crablet used carapace width average 0.07-0.09 cm and weigh average 0.05-0.07 g with total 150 crablets. The treatments applied by trash fish were (A) Tilapia Fish (Oreochromis mossambicus), (B) Longfin Herrings Fish (Ilisha elongata), (C) Sword Fish (Trichiurus lepturus) and (D) Snails (Telescopium telescopium). The results were The best weight growth of crablet occurs in the treatment of T. lepturus (P>0.05) and the highest of survival rates of crablet were found in treatment T. telescopium (P<0.05) than the other. The trash fish were used turned out to be able survival of crablet mud crab (Scylla serrata).

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