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Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology
Published by Universitas Diponegoro
ISSN : 18584748     EISSN : 25490885     DOI : -
Core Subject : Education,
Education
SAINTEK PERIKANAN (p-ISSN: 1858-4748 dan e-ISSN: 2549-0885) adalah jurnal ilmiah perikanan yang diterbitkan oleh Jurusan Perikanan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro. Jurnal ini diterbitkan 2 (dua) kali setahun (Februari dan Agustus).
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Articles 10 Documents
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Search results for , issue "Vol 16, No 3 (2020): SAINTEK PERIKANAN" : 10 Documents clear
AIR-SEA FLUX OF CO2 IN THE WATERS OF KARIMUNJAWA ISLAND, INDONESIA Nurul Latifah; Sigit Febrianto; Anindya Wirasatriya; Hadi Endrawati; Muhammad Zainuri; Suryanti Suryanti; Andreas Nur Hidayat
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.171-178

Abstract

The purpose of this study was to determine the distribution of CO2 flux in Karimunjawa in the east monsoon.  The variables in this study were temperature; pH; salinity; DO; CO2 atm was measured using a CO2 meter; chlorophyll-a, phosphate, silicate were measured spectrophotometric method. Total Alkalinity / TA was measured using the titration method with the principle of changing pH; DIC (Dissolved Inorganic Carbon) was measured using CO2sys software. The partial pressure of seawater carbon dioxide calculated using formula: pCO2sea = 6.31T2 + 61,9 Chla2 – 365.85T – 94.41 Chl-a +5715.94, the partial pressure of atmospheric carbon dioxide calculated using formula: pCO2atm = xCO2atm (pb - pH2O).  The calculation of the estimated CO2 flux using the formula: Flux CO2 = Kh x kwa x (∆pCO2)  , if the CO2 flux has a positive value water acts as a CO2 source, and if it is negative, the waters act as a CO2 sink..  CO2 flux in Karimunjawa waters during east monsoon (represented by August 2018) showed that in Karimunjawa waters with normal pH 7.2-7.4 were dominated by bicarbonate ion HCO3-with an average value of  DIC 1847.24 µmol/kg dan TA 1912.51 µmol/kg.  The partial pressure of seawater CO2 is higher than the partial pressure of atmospheric CO2  this indicates that the role of Karimunjawa waters as a source of CO2 where there is release of carbon dioxide into the atmosphere with CO2 flux values ranging from 8.549 – 13.272 mmol m-2 day-1.  The variables that affect the flux of CO2 were the pCO2sea and ΔpCO2 with a very strong and positive correlation. These two variables were influenced by sea water temperature, salinity, chlorophyll-a, phosphate and silicate.
ANALYSIS OF BIOMASS AND STORED CARBON STOCK IN MANGROVE FOREST AREA, TAMAN HUTAN RAYA NGURAH RAI BALI Luh Putu Puspita Dewanti; Subagiyo Subagiyo; Diah Permata Wijayanti
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.%p

Abstract

Mangrove forests are transitional ecosystems between land and sea that occur mainly along tropical and subtropical coastlines. Ecologically, mangroves function as carbon sinks and stores, with most of them being allocated below the soil surface. It is possible that the increase in atmospheric CO2 that contributes to global warming can be reduced through the process of sequestration of carbon into the soil. The more carbon stored in the soil as soil organic carbon, it can reduce the amount of carbon in the atmosphere so that it can reduce global warming and climate change. SOC (Soil Organic Carbon) is distributed into various layers of soil, and its stability is also very diverse. The objectives of this research are:(1) Knowing the organic carbon storage below the soil surface in the mangrove forests of the Taman Hutan Raya Ngurah Rai and (2) Knowing the vertical variation of organic carbon stored in the soil in the mangrove forests of Taman Hutan Raya Ngurah Rai. The estimation of biomass using the method without harvesting by measuring diameter at breast height (DBH, 1.3 m) mangrove. Carbon deposits are estimated from 46% of biomass. The method used in this research is loss on ignition (LOI). The average distribution of soil organic carbon storage at a layer of 0 cm - 15 cm, 15 cm - 30 cm, 30 cm -50 cm, 50 cm -100 cm and  > 100 cm respectively is 84.18 ton C / ha, 90 , 43 ton C / ha, 93.39 ton C / ha, 115.70 ton C / ha and 80.75 ton C / ha.
THE ROLE OF SEAWEED (Gracilaria verucosa) IN CO-CULTIVATION WITH TIGER SHRIMP (Penaeus monodon) AS AN ECOLOGICAL INTENSIFICATION Lestari Lakhsmi Widowati; Tita Elfitasari; S Budi Prayitno; Sri Rejeki; Pujiono W Purnomo; Restiana W Ariyati; Roel Bosma
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.179-186

Abstract

The use of seaweed as ecological tools for improving environmental condition has been proved to sustain shrimp production. However, adding too much seaweeds caused oxygen depletion and nutritional competition. The objective of this study was to determine the optimum density of G. verucosa for supporting the growth of monodon shrimp. The research was conducted in Tambakbulusan village, Demak Regency with 20 fiber semi outdoor tanks. The tanks were used for the experiment without seaweed and with four densities of seaweed (50, 100, 150 and 200 g.m-2) using hanging rope and were co-cultivated with 80 individuals of post larva (2.0-2.9 g) monodon shrimp in 800 L brackish-water system. The concentration of TAN, NO3, and NO2 were monitored every week, while dissolved oxygen (DO), pH, temperature, and salinity werechecked daily for 30 days. The highest shrimp survival rate (79.75%) and growth rate (6.6%day-1) were obtained in the 100 g.m-2 of G. verucosa, significantly higher than in other treatments. Furthermore, seaweed density has a decreasing effect of NO3 content (g/L) in RL100 from 0.26 to 0.16. and the lowest concentration of NO2 and NO3 were determined. Conversely, the highest density of seaweed (200 g m-2) gave the lowest survival rate of shrimp (53.67%) due to high NO2 content. DO had various values depending on the density and drop to less than 3.5 ppm in the highest density. In all treatments,  pH, temperature and salinity werein a good range for shrimp culture. Thus, 100 g.m-2 of seaweed was optimal for ensuring the function as nutrient removal in shrimp co-culture.
POLLUTION INDEX AND SEDIMENTATION RATE BASED ON LAND USE AT BANJIR KANAL BARAT AND SILANDAK RIVERS, SEMARANG Churun Ain; Siti Rudiyanti; Amryta Dominig; Arina Adriani; Dilia Puspita Asih
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.%p

Abstract

Land use around the river, can affect the condition water quality of waters. The purpose of this study are to determine the pollution index and the rate of river sedimentation, and land use around the Banjir Kanal Barat and Silandak River. The method for sampling was purposive sampling. Sampling was carried out in the Banjir Kanal Barat and Silandak River, each of which had 5 points and 2 repetitions (P1 and P2). The variables analyzed were TSS, BOD, COD, total coliform where analyzed with Indonesian Standard National (SNI); DO, pH, temperature, discharge of water analyzed with Water Quality Checker (WQC), Buchanan method used to analyzed sedimentation rate, and sediment fraction. The results of the study, showed that IP in the Banjir Kanal Barat River obtained an IP value of 4.13 (lightly polluted), while the Silandak River obtained an IP value of 4.69 (lightly polluted). The highest sedimentation rate in the Banjir Kanal Barat River with a value of 35.64 tons / day, while the Silandak River has the highest value of 55.81 tons / day. Sediment fraction in Banjir Kanal Barat River is dominated by clay, and Silandak River it is dominated by clay. Land cover in Banjir Kanal Barat river are 3% industry, 85% settlement, 0% water and 12% vegetation, and Silandak River are 7% industry, 69% settlement, 5% water and 7% vegetation.
SPATIO-TEMPORAL VARIATIONS OF YELLOWFIN TUNA CAUGHT BY HANDLINE IN THE INDIAN OCEAN, SOUTH OF NUSA TENGGARA ROY KURNIAWAN; Bram Setyadji; Suciadi Catur Nugroho; Teja Arief Wibawa
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.187-191

Abstract

One of the main targets from small-scale handline tuna fishery is yellowfin tuna (Thunnusalbacares), where most, if not all of its operation depended heavily on the installment of the fish aggregating device (FAD). The objective of the study was to investigate the spatial and temporal distribution of catch and size of yellowfin tuna from FAD-associated handline fishery. The study was conducted from January to December 2018 with main observation location was in Labuhan Lombok fishing port, West Nusa Tenggara. The results showed that the highest catch rate was obtained during April-June, followed by the frequent emergence of large yellowfin tuna (>100 cm FL). On the other hand, January-March was considered as a low season, where most of the catch was dominated by juvenile yellowfin tuna (<50 cmFL). The spatial distribution of yellowfin tuna abundance is closely related to the presence of FADs, where all fishing operations are carried out around FADs. Also, aggregation of fish was more likely influence by temporal variation rather than the quantity of FAD. More abundant yellowfin tuna were found during the east monsoon (April-June) compared to another season where less fish occurred.
EVALUATION OF EMERGE LAND FOR MANGROVE CONSERVATION PROGRAM IN KALIWLINGI, BREBES DISTRICT, BREBES REGENCY Aditya Dwi Nugroho; Muhammad Helmi; Jusup Supriijanto
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.%p

Abstract

Mangrove ecosystems are very important in the balance of ecosystems in coastal areas, because many mangrove functions cannot be replaced by other ecosystems or vegetation from physical, ecological to economic functions. The mangrove ecosystem is decreasing along with the development of coastal areas construction, reclamation, and natural factors including coastal abrasion. This study aims to evaluate emerge land for the mangrove rehabilitation conservation program in Kaliwlingi, Brebes Regency. The imagery used is Landsat satellite imagery and Sentinel in 1999, 2004, 2009, 2014, and 2019. Image processing is done with the support of ER Mapper 7,0, Arc GIS 10,2,2, The method of determining land for mangrove rehabilitation includes the physical conditions of the waters and the analysis of the sediment’s grain size.   Adjustment area of abrasion in Kaliwlingi, Brebes Regency from 1999 to 2019 were 121,42ha, 109,32ha, 102,98ha and 151,57ha, respectively, Meanwhile, there are 4 points of emerge land found in the research location, With the units of abrasion value in Kaliwlingi, Brebes Regency and  emerge land can be used as mangrove rehabilitation area.
THE ERADICATION OF IUU FISHING IN INDONESIA FOR ECONOMIC FISHERIES Agus Suherman; Mas A Santosa; Dian Wijayanto; Rahmadi Sunoko; Stephanie Juwana
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.154-164

Abstract

Illegal, Unreported and Unregulated (IUU) fishing poses a significant challenge to the management of marine and fisheries resources. This practice brings negative impacts on several aspects, including the economy. To address this problem, the Government of Indonesia established a special Task Force to Combat Illegal Fishing, which later  is known as Task Force 115, through a Presidential Regulation Number 115 of 2015. Task Force 115 was formed with a mandate to execute law enforcement operations to combat illegal fishing.  In general, the existence of Task Force 115 brings favourable impacts to the economy, especially from the fisheries sector. It should be noted that, because Task Force 115’s main tasks are enforcement related, the impacts to the economy are not direct. The purpose of this study was to analyse the role of the Task Force 115 in IUU fishing eradication activities that occur in the jurisdictional areas of the  Republic of Indonesia in terms of the economic fisheries. Efforts of combating illegal fishing does not necessarily generate an increase in fisheries GDP, tax income and exports. Instead, those positive impacts are attributed to a set of policies imposed by the Ministry of Marine Affairs and Fisheries since 2014, which oriented to the responsible and sustainable fisheries. The establishment of Task Force 115 was part of that. Task Force 115’s works created deterrence and triggered compliance of fisheries business actors with the prevailing laws and regulations. Compliance eventually brings positive impacts on the economy. In 2015, growth of fisheries GDP, which amounted to 8,37%, surpassed national GDP of 4.79%. The growth of fisheries GDP reached its peak during the fourth quarterly of the year, which is 8,96% from last year’s during the same period. In 2016, the growth of fisheries GDP reached 5.15%.
BIOLOGICAL ASPECTS, CATCHING ASPECTS AND FISHING GROUND OF EASTERN LITTLE TUNA OR KAWAKAWA(Euthynnusaffinis (Cantor, 1849)) BASED ON THE FISHING GEAR AT WPP 572 Gussasta Levi Arnenda; Bram Setyadji; Ngurah Intan Wiratmini; I Made Sara Wijana
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.%p

Abstract

Eastern little tuna (Euthynnus affinis) is the main catch in WPP572. The caught E. affinis are still in their infancy. This research aims is to know the biological aspects, the fishing aspects and the distribution of the fishing gear per fishing gear, as a consideration for sustainable fisheries management. The research was carried out during the years 2019-2020. Taking samples for gonad observation was carried out by direct survey to the location in February, May, July and October 2019. The measurement of fish length was carried out in stratified random. Catching data were retrieved by requesting secondary data and interviews with related parties. The distribution of fishing grounds is mapped using the QGIS 3.4, the spatial distribution of catches is mapped. This study showed the size structure of E. affinis on purse seine, troll line and encircling gill netfishing gear from 16-55 cm FL, while on the boat/raft lift net it was 21-50 cmFL. These fish growth's is positive allometric on purse seine and encircling gillnet fishing gear, negative allometric on boat/raft lift net fishing gear, and isomeric on troll line. The sex ratio is in the ratio 1: 1.15 and balanced. Based on the maturity level, the gonads were mature in July and October and immature in February and May. Gonads ripened for the first time at a size of 42.032 cmFL. The distribution of the purse seine catchment areas at 3°-6°N and 93°-96°E, and 3°-6°S and 94°-95°E. Boat/raft lift net at 0°-3°S and 95° -101°E. Troll line 4°-6°N and 94°-95 E. Encircling gillnet 0°-2°S and 99°-101°E.
THE EFFECT OF ADDITION SWIMMING CRAB SHELLS FLOUR (Portunus pelagicus) FOR PHYSICAL AND CHEMICAL QUALITY OF EDIBLE SPOON Mohammad Rosikhul Ilmi Hussein Annafiz; Eko Nurcahya Dewi; Lukita Purnamayati
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.165-170

Abstract

Edible spoon product is a spoon-shaped cutlery that is fit to be eaten, this product was developed with the addition of alginate, however, it required high-cost raw material. Swimming crab shells were potential waste from underused swimming crabs which contained calcium carbonate (CaCO3) to strengthen the tissues, sources of calcium minerals, and formed edible spoon mixture.  Swimming crab shells flour was the addition to the physicochemical quality of edible spoon and the best concentration for the product. This research utilized a completely randomized design (CRD) with different concentrations of swimming crab shell flour (0%, 8%, 10%, and 12%). The data were carried out with ANOVA and Tukey's HSD. The results showed that the addition of different swimming crab shell flour concentrations has a significant effect (P<5%) on the hardness parameters, melting time, hedonic properties, protein content, moisture content, carbohydrate content, and ash content except on fat content. The best concentration was 12% swimming crab shells flour with a hardness value of 10.32 ± 0.60 kgf, melting time of 15.02 ± 0.44 minutes, moisture content of 2.65 ± 0.24%, protein content of 8.31 ± 0.23%, carbohydrate content of 83.64 ± 0.29% , fat content of 1.42 ± 0.40% and ash content of 3.66 ± 0.06%. Edible spoon preferably has a hedonic value of 7.97 <µ <8.37 for appearance, odor, taste, and texture parameters.
Analysis Of Changes In Mangrove Area In The North Coast Of Central Java Province Indonesia Patric Erico Rakandika Nugroho; Suryanti Suryanti; Pujiono Wahyu Purnomo
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.%p

Abstract

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