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ILMU KELAUTAN: Indonesian Journal of Marine Sciences

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Published by Universitas Diponegoro

ISSN : 08537291 EISSN : 24067598 DOI : -

Core Subject : Science,

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 7 Documents

Search results for , issue "Vol 24, No 3 (2019): Ilmu Kelautan" : 7 Documents clear

Epiphyte Identification on Kappaphycus alvarezii Seaweed Farming Area in Arungkeke Waters, Jeneponto and The Effect on Carrageenan Quality Sri Redjeki Hesti Mulyaningrum; Hidayat Suryanto Suwoyo; Mudian Paena; Bunga Rante Tampangallo
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 3 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Kappaphycus alvarezii which is widely cultivated at sea is susceptible to other algae that drift away and attach as epiphyte. This study aims to identify epiphyte on seaweed farming K. alvarezii and its effect on carrageenan quality. The study was conducted on K. alvarezii seaweed farming area in Jeneponto, South Sulawesi. Sample of epiphyte was obtained from four stations. Epiphyte was identified in laboratory based on its morphological characteristics and calculated its density. Carrageenan yield and gel strength of healthy seaweed and those infected one were analyzed in laboratory in triplicates for each sample. Data were statistically analyzed using independent samples t-test analysis. Present study showed that there were 6 epiphytes species on the seaweed farming area, namely: Entheromorpha intestinalis, Ceramium sp., Neosiphonia apiculata, Chaetomorpha crassa, Hypnea sp., and Gracilaria sp. The average of epiphytic density in cultivation area was (24.26±9.64)%. Healthy seaweed and infected one had significantly different carrageenan yield and gel strength (P<0.05). Healthy seaweed had higher carrageenan yield (48.17±1.62)% and gel strength (1130.76±8.42) g cm-² than infected seaweed which had carrageenan yield (42.47±0.23)% and gel strength (958.22±10.85) g cm-².

Asexual Reproduction of Black Sea Cucumber from Jepara Waters Retno Hartati; Muhammad Zainuri; Ambariyanto Ambariyanto; Sri Redjeki; Ita Riniatsih; Ria Azizah; Hadi Endrawati
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 3 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Black sea cucumber or Lollyfish are trade name for Holothuria atra, one species of family Holothuriidae abundance in Jepara waters, especially in Panjang Island. They inhabit on the seabed, in shallow waters on reefs and sand flats or in Seagrass meadows. Beside reproduce sexually, H. atra also do fission (biology), i.e. able to reproduce asexually by transverse fission. Monthly survey has been conducted for three months to determine frequency of fission among H. atra population in Panjang Island waters. In total 891 individu of H. atra inhabit in seagrass meadow mixed with rubble were examimed. In fissiparous sea cucumber, transverse fission are followed by regeneration and in this research identified from external observations. The fission state was divided into three category, i.e. closed wound (Category 1), little regeneration either posterior or anterior part (category 2), moderate regeneration either posterior or anterior part (category 3). The result showed that the fission frequency was highest during end of rainy season in April (13,21%) and decreased during May (4,61%) and June (4,86%). Body regeneration seem happened fast, since the new individu sea cucumber at category 1 was low but high as category 3. The regeneration were related with the condition of environment.

First Record of The Burrowing Goby Trypuchen vagina from Pangpang Bay, Indonesia Sapto Andriyono; Endang Dewi Masithah; Heru Pramono; Suciyono Suciyono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 3 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

The burrowing goby, Trypauchen vagina, is recorded for the first time from the Pangpang Bay of Banyuwangi, Indonesia. Types of fish T. vagina is a type that has not published in Indonesia. This fish was caught using trap net in waters Pangpang Bay, which is an essential area in Banyuwangi, East Java. The description of the morphology and fish habitat conditions shows that the region has a diversity of fish resources that need attention. This goby fish has a local name as fish bedhul picek due to the sense of sight on these fish as if it does not work. Eyes covered by skin and socket head section was not found their eyeballs. The body of the specimens is elongate and reddish-pink in fresh specimens in coloration. There is no barbel on the chin. Cycloid scales are present on the whole body except for the head. Muncar people commonly consume T.vagina. This fish has been food sources in several regions but uncommon at several local markets in Indonesia. The T.vagina inhabit at Pangpang Bay as the bay, which has the high primary productivity of these waters due to sufficient nutrient support. Enrichment of nutrient comes from the run-off land and also the input of the number of fishing activity (embankment). An earlier report said that this fish found in waters Banyu Asin, Palembang, Sumatra, Indonesia. It also confirms that the fish found in this study are also living in a mud substrate that is reasonably smooth with right mangrove conditions around the bay, which close to Alas Purwo National Park.

The Impacts of Ecosystem Hypertrophication and Climate Changes on Thrive of the Jellyfish in Shatt Al-Basrah Canal Ali Bassal Mahmood; Imad J. M. Al-Shawi; Hazem A. Al-Sayab; Sejad K. Jasib; Zuhair A. Abdulnabi; Nadia K. Muhsen; Yosra J. Alewi
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 3 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

The present study (i.e. the first study in Iraqi waters) identified the causes of reproduction and excessive growth of the jellyfish, which locally known as thagolol, of the type (Catostylus perezi) in the region of Shatt Al-Basrah canal - west of Basrah city. The reproduction and excessive growth of jellyfish occurs in many estuaries and coastal areas in the world, which is a recurring global problem in the context of climate change. The conducted study was included measurements of dissolved oxygen, electrical conductivity, total dissolved solids, pH, temperature, nitrates, phosphate, quality and quantity of phytoplankton during the dominant of :the northwest winds; the neap tide and during a full tidal periods in October of 2018 and March of 2019. The results showed that there were thrive of jellyfish by huge numbers in Shatt Al-Basrah canal. The physical; chemical and biological causes (i.e., the local causes), were identified, namely: (1) salinity, (2) water column temperature stratification in the context of climate change, (3) an excessive increase in the concentrations of nitrate and phosphate, (4) abundance of phytoplankton (i.e. dinoflagellate), including Protoperidinium sp. and Alexandrium sp.; and (5) overfishing. Hence, the absence of any of these factors will lead to the absence of this type of jellyfish.

Utilization of Wavewatch III Model Output Data for High Wave Analysis Ricky Daniel Aror; Wilhelmina Patty; Andri Ramdhani
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 3 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

This study discusses the occurrence of extreme waves in North Sulawesi waters from 17 to 24 June 2016 using Wavewatch III (WW3) model output data with resolution 0.125o x 0.125o extracted from MIDAS-BMKG. The extracted WW3 data is mapped using ArcMap and presented in graphical form. Based on the results of the study, the significant wave height is in the range of 0.0 to 1.0 m and the average wind speed ranges from 0 to 15 knots in the early phase of 17-19 June 2016. Significant wave increases in the peak phase of 20-22 June 2016 that reaches 1.5 - 2.0 m and average wind speeds reach 25 knots. The average wind speed and the significant wave height decreased after June 23, 2016. The high of the significant wave are influenced by the low-pressure circulation in the atmosphere near the Sangihe-Talaud Islands. Further study can be done as a comparison of this study e.g. using wave data from altimeter satellites or comparing with other parameters such as the influence of swell and wind sea.

Metabolism and Nutritional Content of Polychaeta Nereis sp. with Maintenance Salinity and Different Types of Feed Eko Setio Wibowo; Endah Sri Palupi; I G A Ayu Ratna Puspitasari; Atang Atang
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 3 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Nereis sp. is an invertebrate member of Familia Nereidae, Classis Polychaeta that lives in the estuarin ecosystem as benthic. Nereis sp. is one of the natural foods that can trigger the maturation of shrimp gamete cells up to 70% because they contain high levels of amino acids and unsaturated fatty acids, but the fulfillment of Nereis sp. still rely from nature. That condition encourages the cultivation of Nereis sp., but there is not much information about it. This study aims to determine the metabolic rate and nutritional content of Nereis sp. with different maintenance salinity and feed. This reasearch used immature Nereis sp with two different type of feed, i.e. with vegetable protein and animal protein. They were maintained in three different salinity i.e. 5, 15, and 25 ppt. The results showed that oxygen consumption rate of Nereis sp was affected by salinity of the medium, but was not influenced by the type of feed given. The highest oxygen consumption was observed in Nereis sp. that maintained at 25 ppt. The body protein content is influenced by the salinity and the type of feed given, while the fat content is not affected by the salinity and the feed. The highest protein, fat and carbohydrate content of the body was detected in salinity of 15 ppt and fed with vegetable protein foods.

Source Identification, Bioavailability, and Risk Assessment of Heavy Metals Pb, Cu, and Zn in Surface Sediments of Kelabat Bay, Bangka Island Mohammad Agung Nugraha; Mu’alimah Hudatwi; Fajar Indah Puspita Puspita Sari
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 3 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Although concentrations of many heavy metals has been measured totally, they may not give a good indicator for environmentally hazard to organism. The purpose of this study is to identify sources, determine bioavailability, and assess risk based on the geochemical fractionation of heavy metals Pb, Cu and Zn on the surface sediments of Kelabat Bay, Bangka Island. Fractionation of heavy metals was analyzed by sequential extraction. The concentrations of heavy metals Pb, Cu, and Zn in sediments ranged from 8.86-29.21 mg.kg-1 (average 16.85 mg /kg), 0.16-9.54 mg.kg-1 (average 4.39 mg.kg-1), and 25.58-237.24 mg.kg-1 (average 71.99 mg.kg-1). Pb and Zn in Kelabat Bay are more bound to non-residual fractions (F1+F2+F3) or non-resistant with a range of 60.63-89.87% and 47.98-84.66% that are mainly come from anthropogenic activities. Cu tend to be stored or bound to the residual fraction (F4) with a proportion of 97.7-100% meaning that it comes from natural sources. Based on the Risk Assessment Code (RAC), Pb have a low to moderate risk in the environment and Zn heavy metals are not at risk to low. These conditions indicate the potential for biological availability (bioavailability) of Pb and Zn in the inner bay waters. For heavy metals Cu is not at risk in the environment.

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