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INDONESIA
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 6 Documents
 1 
Search results for , issue "Vol 6, No 2 (2003): Volume 6, Volume 2, Year 2003" : 6 Documents clear
STUDY ON THE QUALITY AND OMEGA-3 FATTY ACIDS COMPOSITION OF SUPER DRIED CATFISH (Arius talassinus) Fronthea Swastawati
JOURNAL OF COASTAL DEVELOPMENT Vol 6, No 2 (2003): Volume 6, Volume 2, Year 2003
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Study on the quality and omega-3 fatty acids composition of dried fish was conducted in order to observe the sensory value, proximate composition, and omega-3 fatty acid content of catfish dried by traditional and mechanical dryer. Experimental laboratories method using t-test resulted that both methods of drying fish were available to be implemented. The evaluation of data of appearance using t-test showed that taccount =3.631>ttab(0.05)(6)=2.447. This indicated that the appearance between two products were significantly  different. But in general there are no significant differences in odor, taste and texture of products.  The product was accepted organoleptically by the panellists with the values of 7.64-8.29. Protein composition of catfish was relatively high : 17.47% and lipid content of 0.73. DHA and EPA values of dried fish using mechanical dryer were 13.8% and 5.1%; whereas traditional dryer were percentage of 12.8% and 7.7%.
THE PERFORMANCE OF LUPIN MEAL AS AN ALTERNATIVE TO FISHMEAL IN DIET OF JUVENILE PENAEUS MONODON UNDER POND CONDITIONS Agung Sudaryono
JOURNAL OF COASTAL DEVELOPMENT Vol 6, No 2 (2003): Volume 6, Volume 2, Year 2003
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

The present study was designed to investigate the performance of isonitrogenous practical diets containing different inclusion levels of dehulled lupin (Lupinus angustifolius) meal as an alternative for fish meal for juvenile Penaeus monodon (4.32 ± 0.57 g) reared in pens under pond conditions with a natural productivity. Five isonitrogenous experimental diets were formulated to contain 0, 10, 20, and 30% dehulled lupin (L. angustifolius) meal with a corresponding reduction in fish meal from 24 (0% replacement; D1 as control) to 18 (25% replacement; D2), 12 (50% replacement; D3) and 6% (75% replacement; D4) and a diet containing dehulled lupin (L. albus) meal formulated to be similar to D2 which was designated as D5 and used for comparison. Each treatment was tested in quadruplicate and arranged in a completely randomised design. In addition, a group of shrimp put in four pond pens was not fed, to estimate the contribution of pond natural production to shrimp growth. There was no significant effect (P>0.05) of different dietary treatments on mean individual weight gain (13.3-14.2 g), survival rate (88-93%) of shrimp, and feed conversion ratio (1.45-1.55). The presence of natural food in the pond was important to boost shrimp production and approximately 36-67% of growth of shrimp in the present study was supplied by natural food.  Under such conditions, dehulled lupin (L. angustifolius) meal can replace up to 75% of protein from fish meal at inclusion levels of up to 30% in isonitrogenous practical diets without any adverse effects on growth, survival, and feed conversion ratio of juvenile P. monodon. Although this study was performed using a pond pen model on a small scale, the results obtained have provided useful information on the potential of lupin based meals in a commercial semi-intensive shrimp farming.
ACCUMULATION OF ALUMINIUM IN THE TISSUE OF GIANT FRESH WATER PRAWN (Macrobrachium rosenbergii de Man) EXPOSED TO ACIDIC WATER CONTAMINATED WITH ALUMINIUM SALT Sri Redjeki
JOURNAL OF COASTAL DEVELOPMENT Vol 6, No 2 (2003): Volume 6, Volume 2, Year 2003
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Aluminium is known as competitive trivalent and its occurance in an acidic environment causes ionic disturbances in aquatic invertebrates and crustaceans. An investigation was conducted to determine the accumulation of aluminium in the tissue of giant fresh water prawn (M. rosenbergii de Man) exposed to acidic water  (pH 5.0) and more alkaline media (pH 6.5) contaminated by aluminium salt (0.3 mg/l of nominal concentration of Al).  A static test with regular water exchange was employed during the experiment. The first moulting was recorded in all treatments at the first week of the investigation.  Normal moulting period, i.e. 6 – 8 days after the first moulting was observed in 55% of prawns in the media with normal pH (pH 6.5).  A longer period, more than 10 days, was needed by prawn in the media at pH 6.5 with 0.3-mg/l aluminium, pH 5.0 and at pH 5.0 with 0.3 mg/l aluminiun.  The third moulting was only recorded at prawn in media at pH 6.5.  The elevated aluminium in the acidic media caused the highest mortality rate and there was no mortality recorded at normal pH.  Most of the mortality was observed before and soon after moulting. The elevation of 0.3 mg/l aluminium in the more acidic water (pH 5.0) increased the aluminium and decreased the calcium concentrations in the prawn tissue. However, the magnesium in the prawn’s tissue showed its highest consentration at pH 5.0 with 0.3-mg/l aluminium. The decrease of calcium concentration in the prawn’s tissue was always followed by the increase of concentration of aluminium significantly (P < 0.01).  This suggests that the aluminium interfers the intake of calcium from the media by the prawn.  However the magnesium intake was not affected.  As a conclusion, the elevated level of aluminium in the acidic media increased the accumulation of aluminium in the prawn’s tissue and influenced the moulting behaviour of the tested prawn by interfering the absortion of calsium and magnesium, i.e. decreasing the calcium and increasing the magnesium concentrations in the prawn tissue.
EFFECT OF CHITIN AND CHITOSAN DERIVED FROM CRAB SHELL AND SHRIMP HEAD ON THE UNFROZEN WATER AND DENATURATION OF LIZARD FISH MYOFIBRILS DURING FROZEN STORAGE Y S Dharmanto
JOURNAL OF COASTAL DEVELOPMENT Vol 6, No 2 (2003): Volume 6, Volume 2, Year 2003
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

The shrimp head and crab shell are rich in chitin and chitosan that can be used as the raw material in various industries. Chitin is composed of 2-acetamido-2-deoxy-D-glucose, whereas chitosan is composed primarily of glucosamine, 2-amino-2-deoxy-D-glucose. Chitin and chitosan can commercially be manufactured in the forms of powder, flake, chitinazed, nitrate chitin and 77-red chitin. Chitin and chitosan is of benefit to neutralize toxicity of polluted water, a pivotal role for strengthening the emulsion system, binding water and fat, advancing the loaf volume of bread, and for binding food drying, purification of apple, beer, wine extracts, etc. To find out the effect of chitin and chitosan of shrimp head and crab shell on the unfrozen water and denaturation of lizard fish myofibrils during frozen storage, chitin and chitosan were added at certain ratios 0; 2.5 – 7.5 g / 100 g, with non chitin and chitosan treatments as control. Changes of unfrozen water in myofibrils during frozen storage were studied based on the relationship between water content and transition heat, which was determined by Differential Scanning Calorimeter (DSC), whereas Ca-ATPase activity was analyzed using formula introduced by Katoh et. al., (1977). During frozen storage, chitin and chitosan treatments influenced the amount of unfrozen water and Ca-ATPase activity. Without chitin and chitosan the amount of unfrozen water in myofibrils decreased rapidly, whereas the decrease was moderate when myofibrils received chitin and chitosan. The change in Ca-ATPase activity exhibited a similar tendency to those of the unfrozen water indicating a close correlation between Ca-ATPase activity and amount of unfrozen water.  
PRELIMINARY STUDY OF THE POTENCY OF SEDIMENTATION RATE IN BANJIR KANAL TIMUR SEMARANG COASTAL WATERS Tonny Bachtiar
JOURNAL OF COASTAL DEVELOPMENT Vol 6, No 2 (2003): Volume 6, Volume 2, Year 2003
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Five sets of sediment traps were installed for thirty days (Oct.- Nov. 1999) in Banjir Kanal Timur Semarang coastal waters to examine the potency of sedimentation rate. Two sediment traps were lost in the second week of measurement. Based on the average data of three sets of sediment traps, the potency of sedimentation rate in Banjir Kanal Timur Semarang coastal waters was 6.10 cm/month. The result did not reflect the fact of the field condition. Based on the correction made  on the input of suspended discharge into Banjir Kanal Timur Semarang coastal waters and the average area of sediment distribution, the potency of sediment rate in Banjir Kanal Timur Semarang coastal water during transition of dry season to rainy season was 0.35 cm/month.
AN ASSESSMENT ON FISHERS’ COMPLIANCE BEHAVIOR IN PEMALANG REGENCY, CENTRAL JAVA - INDONESIA Indah Susilowati
JOURNAL OF COASTAL DEVELOPMENT Vol 6, No 2 (2003): Volume 6, Volume 2, Year 2003
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

The study was conducted due to high incidence of non-compliance by fishers in Central Java fisheries. The overall objective of the study is to examine the compliance behavior of fishers in Pemalang Regency. Eighty-five (n=85) respondents have been selected from the study areas using multi-stages sampling method. Moreover, key-persons from Fisheries Office, Navy and head of fishers’ association have also been interviewed  to enrich the analysis of the study. Non-compliance behaviour of fishers in this study was viewed from violation of: restricted area (zoning), restricted gears and means (explosive and poison) and administration (such as permits). Model of non-compliance behavior as outlined by Kuperan (1993) and Susilowati (1998) has been applied to analyze the data in this study with necessary modification. Tobit model explained by Gujarati (2003) was employed as the estimation techniques. Most of independent variables such as demographical factors, fishing effort, deterrence indicators and legitimacy variables have expected signs although statistically are not always significant. In general, the model of non-compliance behaviour could portrait the phenomena of violation behaviour of fishers in the study area.  It is realized that  law enforcement in Indonesian fisheries is weak  for several reasons. Therefore, to improve the fishers’ compliance perhaps an alternative approach such as empowering the people and its stakeholders should be found.

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