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JOURNAL OF COASTAL DEVELOPMENT
Published by Universitas Diponegoro
ISSN : 14105217     EISSN : -     DOI : -
Core Subject : Education,
Education
The Journal of Coastal Development (ISSN 1410-5217) is dedicated to all aspects of the increasingly important fields of coastal and marine development, including but not limited to biological, chemical, cultural, economic, social, medical, and physical development. The journal is jointly published by the Research Institute of Diponegoro University, Semarang, Indonesia and Indonesian Assosiation of Oceanologist (ISOI).
Arjuna Subject : -
Articles 328 Documents
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STRATEGIES FOR MANGROVE REHABILITATION IN AN ERODED COASTLINE OF SELANGOR, PENINSULAR MALAYSIA Oswin D Stanley; Roy R Lewis III
JOURNAL OF COASTAL DEVELOPMENT Vol 12, No 3 (2009): Volume 12, Number 3, Year 2009
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Continuous mangrove ecosystem degradation and coastal erosion is observed along the coastline of SungaiHaji Dorani, (N 03038’36.6”; E 101000’37.3” to N 03038’37.9”; E 101000’34.0”) Selangor, PeninsularMalaysia. Foreshore mangrove plantation challenges below mean sea level are in progress in this highenergy coast. There are interventions of gabion breakwaters and geo-textile tubes to alleviate the wavevelocity striking the shore. The area between the breakwaters and coastline is chosen for mangroveplantation. The soil is fluid silt sludge with average clay, silt and sand proportion of 43.03 %, 351.8 % and5.14 % respectively. The maximum height of the tide recorded onshore was 2.8 m and in the middle of theplantation area the height of the water flooding is ±3.5 daily during tides. Number of plant species on theSAUH concrete revetment is 43 with 12 mangrove species and on the fringe reference mangroves is 27 with8 true mangrove species. This paper explains the method to identify the potential location for mangroverehabilitation, possibility of establishing mangroves on the seafront in the chosen area and conservation ofthe existing strip with 14 mangrove species. Overall sediment accretion since May 2008 is ±0.0037cm perannum which is considerably negligible. Opening out the earthen bunds along the coastline is the actualsolution for natural mangrove translocation and stabilization in this particular coastline, however, it is notpractically possible. Hence, we have studied an alternative strategy of rehabilitating mangroves at theelevation of +0.5 m to 1m MSL along this shoreline and also in an engineered firm sediment filled zone. Wepropose carrying out hydrological restoration in the natural habitats for survival and further naturalcolonization of mangroves.
EXPLORATION OF SKIPJACK FISHING GROUND THROUGH SEA SURFACE TEMPERATURE AND CATCHES COMPOSITION ANALYZES IN PALABUHANRATU BAY WATERS Domu Simbolon; Mario Limbong
JOURNAL OF COASTAL DEVELOPMENT Vol 15, No 2 (2012): Volume 15, Number 2, Year 2012
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Abstract

Fishing ground condition is usually affected by oceanographic parameters. One of the oceanographic parameter that had been used in forecasting the availability of pelagic species such as skipjack is sea surface temperature (SST). Skipjack fish is the main target for boat seine net fishery in Palabuhanratu Bay from June to October 2007. Information on skipjack fishing ground availability is very important in order to optimize fishing operation. The purposes of the study are: to determine the SST distribution, to analyze the catch composition of skipjack, to determine the relationship between SST and skipjack catch, and to forecast the skipjack fishing ground in Palabuhanratu Bay from August to October 2007. The research consist of two stages. The first stage was conducted in Palabuhanratu Bay waters in August-October 2007, using survey method, with ten samples of boat seine net (payang). The second stage conducted on December 2007 to collect the SST data, which downloaded from the internet. The range of SST in Palabuhanratu Bay waters ranged from 22oC - 29oC in August 2007, 21oC - 27oC in September 2007 and  20oC - 31oC in October 2007. The SST had no significant effect on catch volume of skipjack in Palabuhanratu Bay during August until October 2007, but gave  effect to the size distribution. The big skipjack distributed at the wide range of SST, but the small skipjack distributed at the narrow range of SST. The potential fishing ground of skipjack in Palabuhanratu Bay during September 2007 was found at Teluk Ciletuh, Ujung Karangbentang, Cimaja, Teluk Cikepuh, Ujung Genteng, and Gedogan waters.
OXYGEN CONSUMPTION OF SCALLOP PECTEN MAXIMUS IN DIFFERENT PHYSIOLOGICAL CONDITION Djoko Suprapto
JOURNAL OF COASTAL DEVELOPMENT Vol 1, No 3 (1998): Volume 1, Number 3, Year 1998
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Abstract

The level of oxygen consumption is one of the indicators of organism physiological condition. It can be used to understand the energetical flow of the organism and finally some measures can be take to manipulate the environmental condition in order to give the optimum environment to grow. A semi open system or semi running system was used to measure the oxygen consumption. The principle of the measurement was to calculate the difference between the oxygen concentration of water entering respiratory chambers with the one out of respiratory chambers. The experiment was using Pecten maximus coming from Brest, Scotland, Ireland, and Saint Brieux. Each population showing difference rate of oxygen consumption, meanwhile oxygen consumption influenced by bodyweight and other physiological conditions. Scotland population having the best performance of energetical balance, compared with the other three population.
EVALUATION ON UTILIZATION OF SMALL MARINE FISH TO PRODUCE SURIMI USING DIFFERENT CRYOPROTECTIVE AGENTS TO INCREASE THE QUALITY OF SURIMI Tri Winarni Agustini; Y. S. Darmanto; Danar Puspita Kurnia Putri
JOURNAL OF COASTAL DEVELOPMENT Vol 11, No 3 (2008): Volume 11, Number 1, Year 2008
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Abstract

Quality of surimi (minced meat of fish) usually decrease due to denaturation of protein. Addition of cryoprotective agent such as reducing sugar as anti denaturation of protein is very important during storage of frozen surimi. Recently, development of human lifestyle require healthy food such as utilization of stevia sugar (Stevia rebaudiana) which has low calorie that can be used to replace sorbitol and sucrose during processing of surimi. The purposes of this research are to observe the effect of different cryoprotective agents before and during storage as well as the effect of storage on quality of frozen surimi fish based on pH value, water holding capacity (WHC), gel strength and organoleptic value. Materials used was surimi made from kurisi (Nemipterus sp.), stevia sugar, sorbitol and sucrose. Research method used was experimental laboratory with research design of Completely Randomized Design with split plot in time. The main plot was difference of cryoprotectant (stevia sugar 0.6%; sorbitol 4%; sucrose 4%). The product was analysed every 15 days starting from 0 to 45 days storage at – 10oC. The results showed that different cryoprotectants agent gave no significant effect before storage treatment proceed. In addition during storage, the different of cryoprotectant gave significant effect to WHC and gel strength (SSS=1356,416; SS=1458,525; S=1511,307 g.cm) but not for pH. The organoleptic value for appearance on 15 days storage was SSS=7; SS=7; S=6,56 and Folding test showed SSS=7; SS=7.78; S=7,89) 
THE EFFECTS OF ENVIRONMENTAL FACTORS ON THE DYNAMIC GROWTH PATTERN OF MANGROVE Avicennia marina Endah Dwi Hastuti; Sutrisno Anggoro; Rudhi Pribadi
JOURNAL OF COASTAL DEVELOPMENT Vol 16, No 1 (2012): Volume 16, Number 1, Year 2012
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Abstract

Avicennia marina is a species of mangrove tree occurs in the intertidal zones of estuarine areas in Asia, including Indonesia. Mangrove within the genus member of Avicennia have long dominated many coastal areas along Semarang and Demak coasts. The aim of this research was to analyze the effect pattern of several environment parameters to Avicennia seedling growth rate. Observation was held by setting 8 stations with 3 transects, each including mangrove survey and environment parameter measurements. Mangrove survey including seedling and sapling stage occupying 1 x 1 m and 5 x 5 m transect plot respectively. While environmental factor measurements including on site measurement for temperature, salinity, pH and DO and laboratory analysis for organic matter, nutrient (N,P,K) and sediment structure. The results showed there were 2 effect pattern for environmental parameters observed including polynomial quadratic and logarithmic patterns. Parameters which had polynomial quadratic pattern including salinity, DO, P, sand and silt, while parameters which had logarithmic pattern were temperature, pH, organic matter and N.
TRITIUM TRANSFER AND CONCENTRATIfON IN THE OCEAN Eko Hidayanto
JOURNAL OF COASTAL DEVELOPMENT Vol 8, No 1 (2004): Volume 8, Number 1, Year 2004
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Abstract

Environmental transport models have been developed for evaluation of radiation doses from tritium released into the atmosphere. Recently, models contain not only inhalation and skin absorption as routes of tritium transfer from the atmosphere to humans, but also the ingestion pathway. Tritium releasing to the environment is contribute to added tritium concentration in the ocean. This paper describes the tritium transfer from the environment to the human body and the possible health effects if it is taken inside the body, the factors which influence the differences of tritium concentrations in the coastal seawater, and the formula of the tritium concentration balance in the ocean surface.
COORDINATION AMONG LOCAL AGENCIES IN DECENTRALISED FISHERIES EXTENSION: COMPARATIVE PERCEPTION OF EXTENSION OFFICERS IN JAVA, INDONESIA , Waridin
JOURNAL OF COASTAL DEVELOPMENT Vol 5, No 2 (2002): Volume 5, Number 2, Year 2002
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Abstract

This study is intended to describe the conditions of coordination among local agencies involved in the implementation of decentralisation policy in fisheries extension in Java, Indonesia. In addition, this study is also aimed at assessing the effectiveness of the policy implementation, and determines its relationship to coordination among local agencies involved. Population of this study comprised all fisheries extension officers attached with Rural Extension Centres (RECs). A multi-stage random sampling method was utilised for selecting the subjects for the study. A total of 50 officers at 10 districts in three provinces were covered in this study. Data were collected during January to March 1998 by using interview and self-administered techniques. Descriptive statistics and correlation analyses were used in the study. The majority of officers confirmed that the RECs were not coordinated with related agencies involved in implementation of the policy. This indicates that policy implementation is not effectively done. Coordination among agencies involved was found to correlate highly to the effectiveness of policy implementation. Intensity of coordination among agencies involved in the policy implementation needs to be improved. A clearer directive for functions, responsibilities and relationships among agencies involved might help in strengthening the current coordination functions.
PRODUCTIVITY OF TROPICAL LIMPET Cellana testudinaria ` (Linnaeus, 1758) LIVING ON THE ROCKY SHORE OF OHOIWAIT, SOUTHEAST MOLUCCAS, INDONESIA Abraham .
JOURNAL OF COASTAL DEVELOPMENT Vol 9, No 2 (2006): Volume 9, Number 2, Year 2006
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Abstract

Study on the productivity of tropical limpet C testudinaria has been carried out at approximatelv monthly intervals fom October 200] to September 2002. A total of 2404 limpets of 8.2 - 3],8 mm in size were obtained in ]2 month collections. The size structure of population presented 6 cohorts with accounting for 48% ofthe second cohort ofthe total population, The mean annual population biomass was estimated to be IOI3 1 748 mg AF DWm'2 or 2].8 kim`), hence the annual population production estimated by the mass specific growth rate method to be 2.8] gr.m`Z or 60. 7 K.Lm`2.yr". The annual biomass turnover ratio Qzroduction to biomass ratio, P/B) was 2. 77 yr". This value ofthe P/B ratio is higher than those obtained for other limpet species living 2 to 5 years reported by other researchers due to the diferentkaturing of growth parameters such as K = l.4 yr" and L., = 33.08 mm resulted for C. testudinaria.
TOPOGRAPHIC CHANGES AFTER 2004 AND 2005 EARTHQUAKES AT SIMEULUE AND NIAS ISLANDS IDENTIFIED USING UPLIFTED REEFS S. Suyarso
JOURNAL OF COASTAL DEVELOPMENT Vol 12, No 1 (2008): Volume 12, Number 1, Year 2008
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Abstract

Research on the topographic changes due to Aceh earthquake, December 2004 and Nias earthquake, March 2005 was carried out at Weh, Simeulue and Nias islands from end of July until August 2005. The topographic changes were measured based on the present position of uplifted coral reefs with geodetic methods. Research results shows northwest part of Simeulue Island uplifted 1.55 up to 1.60 meters after earthquake on December 2004 and three months later southeast part of Simeulue Island and northwest part of Nias Island uplifted 1.70 up to 2.70 meters due to earthquake on March 2005. The raised shallow water reef flats become new land and apart of previously shallowest reef slope become new reef flats. 
THE PERFORMANCE OF EARLY-AGE CONCRETE WITH SEAWATER CURING M.I Retno Susilorini; Kristina Retno Dewi W; Tri Wibowo
JOURNAL OF COASTAL DEVELOPMENT Vol 8, No 2 (2005): Volume 8, Number 2, Year 2005
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Abstract

It is well known that concrete has been implemented for marine structures. Marine environment causes physical and chemical deterioration of concrete structures, thus, there is no doubt that the durability takes an important role in concrete performance. Learning about the performance of early-age concrete is to study the maturity of concrete, which is a key of concrete durability where “Maturity Concept” attempts to predict the development of concrete properties as a function of time and temperature of curing and becomes an excellent indicator of in-place strength development and quality from fresh to hardened concrete. It is a hypothesis for this research that the compressive strength of early-age concrete cured by seawater is higher than the one cured by plain water. This research was conducted by using two methods, experimental method and analytical method. The experimental method investigated the compressive strength of concrete cylinders, with 7 days and 14 days seawater curing and plain water curing. Concrete compressive strength design, f’c, is 22.5 MPa, and varies with water-cement ratio: 0.4, 0.5, and 0.6. After 7 days and 14 days of curing, the concrete cylinders were tested by compressive testing machine. The experimental results of this research showed that the compressive strength of 7 days and 14 days concrete specimens with seawater curing is higher than those cured by plain-water, about 2.56-5.25% for 7 days old specimens and 3.39-11.87% for 14 days old specimens. The result also showed that the lower water-cement ratio, the higher concrete compressive strength would be. The analytical calculation also gave higher compressive strength to specimens cured by seawater, about 0.06-0.39% for 7 days old specimens and 0.11-0.33% for 14 days old specimens. The higher strength compressive of concrete specimens with seawater curing is provided by the existence of calcium chloride in seawater and by high temperature of seawater. The analytical result of the “Maturity Concept” has given a good performance in predicting the compressive strength of concrete very well veryfying the experimental results. The hypothesis of this research is proven, that both experimentally and analytically, the compressive strength of 7 days and 14 days old concrete specimens cured by seawater are higher than those  cured by plain water.

Page 25 of 33 | Total Record : 328

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