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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 22, No 2 (2017): Ilmu Kelautan" : 7 Documents clear

Prediction of Potential Fishing Zones for Skipjack Tuna During the Northwest Monsoon Using Remotely Sensed Satellite Data Mukti Zainuddin; Safruddin Safruddin; Muhammad Banda Selamat; Aisjah Farhum; Sarip Hidayat
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 2 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

One of economically important fish in the Bay of Bone is Skipjack tuna which their distribution and migration are influenced by surrounding environment. This study aims to investigate the relationship between skipjack tuna and their environments, and to predict potential fishing zones (PFZs) for the fish in the Bone Bay-Flores Sea using satellite-based oceanography and catch data. Generalized additive models (GAMs) were used to assess the relationship. A generalized linear model(GLM) constructed from GAMs was used for prediction. Monthly mean sea surface temperature (SST) and chlorophyll-a during the northwest monsoon (December-January) together with catch data were used for the year 2012-2013. We used the GAMs to assess the effect of the environment variables on skipjack tuna CPUE (catch per unit effort). The best GLM was selected to predict skipjack tuna abundance. Results indicated that the highest CPUEs (fish/trip) occurred in areas where SST and chlorophyll-a ranged from 29.5°-31.5°C and 0.15 - 0.25 mg m-3, respectively. The PFZs for skipjack were closely related to the spatial distribution of the optimum oceanographic conditions and these mainly developed in three locations, northern area of Bone Bay in December, in the middle area of the bay (4°-5.5°S and 120.5°-121.5°E) during January and moved to the Flores Sea in February. The movement of skipjack concentration was consistent with the fishery data. This suggests that the dynamics of the optimum oceanographic signatures provided a good indicator for predicting feeding grounds as hotspot areas for skipjack tuna in Bone Bay-Flores Sea during northwest monsoon. Keywords: skipjack tuna, potential fishing zones, satellite based-oceanographic data, Northwest monsoon

Exploration, Isolation, and Identification of Carotenoid from Bacterial Symbiont of Sponge Callyspongia vaginalis Iqna Kamila Abfa; Ocky Karna Radjasa; A B Susanto; Handung Nuryadi; Ferry F. Karwur
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 2 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

During the past two decades research on marine bacteria has highlighted the tremendous potential of symbiotic-microorganisms as a source of bioactive secondary. One of the potential of the bacterial symbionts is producing a natural pigment, and these organisms can be used as a sustainable source of natural pigments. Carotenoid is one of the most important pigments that has important roles in physiological and molecular processes of microorganisms, as well as for human health. The objective of this study is to analyze carotenoid pigments from marine bacterial symbionts from sponge and to identify bacterial symbionts that produce carotenoid pigments. Pigment analysis was performed by a UV-VIS spectrophotometer and High Performance Liquid Chromatography (HPLC). Molecular bacterial identification was performed based on 16S rDNA sequence. The isolation of bacterial symbionts from C. vaginalison Zobell 2216E medium resulted in one bacterium, CB-SP5, positively synthesized carotenoids. By reverse phase HPLC analysis, the carotenoid pigments in the bacterial symbionts were identified as diadinoxanthin, fucoxanthin, neoxanthin, dinoxanthin, anddiadinochrome. CB-SP5 shared the highest level of 16S rDNA gene sequence similarity with Psychrobacter celer (99%). Keywords : carotenoid, sponge, bacterial symbiont, 16S rDNA.

Variation of Tidal Range Based On Hijra Calendar And Its Relation With Ethno-Oceanography of The Sama Tribe In Eastern Indonesia Salnuddin Salnuddin; I Wayan Nurjaya; Indra Jaya; Nyoman M.N Natih
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 2 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Based on Ethno–Oceanography of the Sama tribe in Eastern Indonesia, they measured and determined tidal range when Sya’ban taking place. Why do they do so? The questions and objective of this study were intended to respond the scientific fundamental of Ethno-Oceanography of the Sama tribe. In order to achieve the objective of this study, the tidal range value in each Hijra month was compared and analyzed statistically (ANOVA). Tidal Analysis results showed that the tidal range at Sya’ban was higher and the deviation was lower than the other months. Moreover, ANOVA results showed that Sya’ban was significantly different (P<0.05) on Highest High Water Level (HHWL) throughout Hijra month. Keywords: Sama Tribe, Sya’ban, Hijra Calendar

Roles of Eco-labeling in Fisheries Conservation and Sustainability Olaniyi Alaba Olopade; Henry E. Dienye
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 2 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

An important goal of fisheries management is to ensure that fish stocks are harvested at sustainable levels of fishing pressure. However, the classical maximum sustainable yield theory and its derivatives have not worked for fisheries management. A number of mitigating measures have been suggested of which eco -labeling is one. An ecolabel on a fish product is a distinctive mark or statement indicating that it has been harvested in compliance with preset sustainability standards. This paper examines eco labeling in fisheries as the new strategy to achieve fisheries conservation and sustainability. It emphasizes the importance of fish as critical food resources and new approach to fisheries management through the use of certification programs. It considers the benefits and problems that may accrue from eco-certification of fish harvesting and trade practices in fisheries. This paper, attention is focused on examining the likely option for development of eco-labeling scheme in Nigeria. The paper concludes that the increase awareness amongst stakeholders of the potential role of eco-labeling in conservation and sustainability tools should be established. Keywords: Fisheries management, fish, conservation, eco-certification

Assessment of Sustainable Use of Coastal Resources of Regional Waters Conservation Area Biak Numfor Regency, Papua Province, Indonesia Sutaman Sutaman; Yusli Wardiatno; Mennofatria Boer; Fredinan Yulianda
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 2 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Efforts to exploit fish resources optimally, continuous and sustainable is an urgent demand for the greatest prosperity of the people, especially to improve the welfare of fishermen and fish farmers. The level of sustainable use of coastal resources in water conservation is very important, so that the utilization does not exceed the carrying capacity of the environment. The purpose of this study was to determine the level of sustainable use of coastal resources Biak Numfor, associated with the utilization of fisheries, aquaculture and tourism. The study was conducted in June to December 2015 and October to November 2016. The primary data obtained by interview and direct discussion through Focus Group Disscution (FGD) with fishermen community, tourist and tourist entrepreneurs as well as related officials in the Office of Fisheries and Marine Affairs, and Tourism Office of Biak Numfor Regency. Methods of data analysis approach sustainability analysis conducted by the method of MDS (Multi-Dimensional Scaling) with the help of software Rapfish. Based on the survey results revealed that the value of fisheries ordinated to achieve 57.66%, 44.80% aquaculture, and tourism 46.25%. With these achievements ordinated value, it can be concluded that the use of sustainable capture fisheries are still classified by the lever sustainability attributes include; the type of fishing gear, vessel types used and the catch per unit effort (CPUE). Meanwhile the relatively less sustainable aquaculture with the sustainability lever attributes include; cultivation technology, the number of business units with different types and species of fish. For tourism utilization is still considered less sustainable with levers sustainability attributes include the number of tourists, the type and number of amenities and facilities and infrastructure Keywords: Sustainability, utilization, waters conservation area (KKPD), MDS-Rapfish

Genetic Profile Assessment of Giant Clam Genus Tridacna as a Basis for Resource Management at Wakatobi National Park Waters Muhammad Nur Findra; Isdradjad Setyobudiandi; Nurlisa Alias Butet; Dedy Duryadi Solihin
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 2 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Giant clam population has been decreased in a few years. Resource management requires information from various aspects, such as ecological, population, and other aspects. This study was aimed at assessing the genetic profile of Tridacna giant clam in Wakatobi National Park waters using Cytochrome oxidase subunit I (COI) genetic marker. Sample collection was conducted around the three main islands, i.e., Wangi-wangi, Kaledupa, and Tomia. Genetic analysis using COI gene may contribute in identifying giant clams up to the species level and showed the relationship among species. The research found 41 specific nucleotide sites for the clams. T. crocea, T. squamosa and T. maxima had 2, 15 and 24 sites, respectively. COI gene as a biological marker was able to separate groups of giant clam by species. Nucleotide variation of T. crocea from Wakatobi was the highest among other locations, so it could be used as a genetic source for translocation and domestication. Keywords: cytochrome oxidase subunit I, specific nucleotide, Tridacna, Wakatobi National Park

Pathogenic Assay of Probiotic Bacteria Producing Proteolytic Enzymes as Bioremediation Bacteria Against Vannamei Shrimp Larvae (Litopenaeus vannamei) Wilis Ari Setyati; Muhammad Zainuddin; Person Pesona Renta
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 2 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Application of bacteria in bioremediation of shrimp culture ponds is one of the methods used to clean internal pollutants. This study aimed to evaluate the pathogenicity of extracellular proteolytic enzyme produced by the probiotic bacteria as bioremediation bacteria on vannamei shrimp larvae culture. There were five probiotic bacteria, which were successfully isolated from the sediments served as substrate in mangrove area. The isolated bacteria were coded in number as 13, 19, 30, 33, and 36. Pathogenic bacteria Vibrio harveyi was used as positive control. Pathogenic assay was carried out in two different bacterial concentrations, i.e. 10⁸ and 10⁶ cells.mL-1. The results showed that the lowest survival rate (SR) of shrimp larvae in positive control V. harveyi was 53 and 65%. Whereas isolates with the highest SR value (100%) were obtained from bacteria coded as 13 and 30. Isolates no. 19, 33 and 36 had SR of more than 90%. Total plate count (TPC) data showed that the bacteria increased significantly at the end of the study with an average increase value of 24%. The smallest TPC value was shown by bacterial isolate no. 19, while the largest was obtained from the isolate no. 13. These results suggest that all probiotic bacteria were not pathogenic to the vannamei shrimp larvae. Keywords: aquaculture, shrimp, bioremediation, pathogenesis, vibrio.

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