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Jurnal Perikanan Universitas Gadjah Mada

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Published by Universitas Gadjah Mada

ISSN : 08536384 EISSN : 25025066 DOI : -

Core Subject : Science, Agriculture,

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

Jurnal Perikanan Universitas Gadjah Mada are published to promote a critical review of the various investigative issues of interest in the field of fisheries between the researchers, academics, students and the general public, as a medium for communication, dissemination, and utilization of wider scientific activities.

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Articles 465 Documents

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BUDIDAYA UDANG WINDU, Penaeus monodon PADA TAMBAK TANAH SULFAT MASAM DI TARAKAN, KALIMANTAN TIMUR Brata Pantjara; Markus Mangampa; Rachman Syah
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 1 (2010)
Publisher : Universitas Gadjah Mada

Low productivity in acid sulphate soil (ASS) pond can be improved by pond bottom reclamation. The aim of this research was to observe the effects of soil reclamation in acid sulphate soil on survival rate and production of tiger prawn. The research was conducted in a farmer pond in West Tarakan, Tarakan, East Kalimantan. The soil treatments were reclamation and without reclamation. The density of tiger prawn was 40.000 ind./ha during 3 months. The result showed that ponds with and without reclamation produce survival rate by 28.5% and 21.6% respectively. Pond with reclamation produce higher tiger prawn production (191.9 kg/ha) than without reclamation (143 kg/ha).

KUALITAS SELAI YANG DIOLAH DARI RUMPUT LAUT, Gracilaria verrucosa, Eucheuma cottonii, SERTA CAMPURAN KEDUANYA Eko N. Dewi; Titi Surti; Ulfatun Ulfatun
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 1 (2010)
Publisher : Universitas Gadjah Mada

The aims of this research were to investigate the physical, chemical and organoleptic quality of jam that processed from 3 different seaweeds raw material. Materials that used in this research were Gracilaria verrucosa, Eucheuma cottonii and its combination. Seaweeds were boiled, blended, mixed with sugar and stirred for 20 minutes and jams are packaged. The experimental design applied was Completely Randomized Design with 3 treatments and each treatments were triplicates. Data on moisture content, sugar content, crude ﬁ ber, pH, water activity, viscosity and sensory evaluation were tested with analyzes of variance. The HSD test was conducted in order to determine the differences among treatments. While sensory evaluation data were analyzed by using Kruskall Wallis test.Based on the results, moisture content of combination jam were signiﬁcantly different (P<0.05) from E. cottonii jam, but it did not signiﬁcantly different (P>0.05) to G. verrucosa jam. Water activity of combination jam showed there were signiﬁcantly different (P<0.05) from E. cottonii jam, but it did not signiﬁcantly different (P>0.05) to G. verrucosa jam. While, between G. verrucosa and E. cottonii showed did not signiﬁcantly different (P>0.05). For pH value, sugar content, and crude ﬁ ber content showed did not signiﬁcantly different (P>0.05). There were highly signiﬁ cant different (P<0.01) on the viscosity of E. cottonii jam from G. verrucosa jam, and it was signiﬁcantly different (P<0.05) to its combination jam. While, viscosity of its combination jam did not signiﬁcantly different (P>0.05) from G. verrucosa jam. The sensory evaluation (color, texture, taste and odor) results indicated that there were signiﬁ cant differences (P<0.05) among treatments. However the spreads characteristic showed did not signiﬁcantly different (P>0.05).

PENGARUH KONSENTRASI KAPUR (CaCO3) TERHADAP PERTUMBUHAN LOBSTER AIR TAWAR (Cherax quadricarinatus) Arki Y. Arsono; Rustadi Rustadi; Bambang Triyatmo
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 1 (2010)
Publisher : Universitas Gadjah Mada

This research was conducted to determine the effect of lime (CaCO3) concentration on the availability of calcium in water and growth of Crayﬁsh (Cherax quadricarinatus). Completely random design was used in the experiment that consisted of 4 treatments and 3 replications. Four treatments of lime concentration were 0, 50, 100, and 150 mg CaCO3/l. The research was conducted in Fisheries Research Station, Agriculture Faculty, Gadjah Mada University for 30 days. Ten Crayﬁsh were reared in 60 cm x 40 cm x 50 cm aquarium in 60 l water. Crayﬁsh were fed ad libitum with Tubifex tubifex. Calcium concentration on water, Crayﬁsh growth, and water quality were observed every tenth days. The data of calcium concentration on water and Crayﬁsh growth were analyzed with regression and correlation analysis at 95% conﬁ dence level, whereas water quality analyzed descriptively. The research showed that there was correlation between lime concentration and its availability in the water. It showed that, more lime concentration resulted on higher calcium availability in water. Crayﬁsh growth was relative faster on higher lime concentration.

BEBERAPA ASPEK BIOLOGI IKAN DEMERSAL DAN KRUSTASEA DI PERAIRAN ARAFURA Wedjatmiko Wedjatmiko
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 1 (2010)
Publisher : Universitas Gadjah Mada

Arafura water is one of the centers of demersal fish and shrimp production in Indonesia. The exploitation of demersal fish and shrimp has grown quite rapidly, cause a declining trend in production from year to year. Besides the decline in production, changes also assumed to be occur in community and size structure of demersal fish and crustaceans. This research was conducted in the water of the Arafura in October to November 2006 to know the development of waters resources, particularly demersal fish and crustaceans (shrimp and crab). The result showed that there were changes in the composition of crustaceans, where commercial shrimp production decreased followed by an increase in types of non-commercial crustaceans (shrimp and crab). Family Portunidae (crabs) were very abundant and the most dominant species was Carybdis natator (98% of all crab species caught) with average catch rate of about 66 kg/hr. The size of demersal fish generally showed a declining trend. We observed in this research was much smaller than the previous year. Shrimp catches were dominated by krosok shrimp (Metapenaopsis sp.) which is a non-commercial shrimp.

SEBARAN SPASIAL PLANKTON DI PERAIRAN BAWEAN Djumanto Djumanto
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 1 (2010)
Publisher : Universitas Gadjah Mada

The presence of phytoplankton in the water is very important because it serves as a primary producer that is often used as an indicator of aquatic fertility. The objective of the research was to determine the species, density and spatial distribution of plankton in the Bawean waters, Gresik regency. Baruna Jaya VIII research vessel was used for sampling on 29-30 April 2009. Sampling locations were set up in two stations on the position of 06°05'S, 112°36'E and 06°05'S, 120°12'E, and water samples were taken at depths of 0m, 20m, 40m and 60m in each station. Water was collected using water samplers at amounts of 10 liters each depth, thenwas ﬁltered using plankton net, and then preserved with formalin 4%. Identiﬁcation of genus plankton was carried out in the laboratory.The results showed that there were 20 genus of phytoplankton and 38 genus of zooplankton which were spread outin each depth of the water column unevenly. Plankton density was as much as 2330 cells / liter, while the density of zooplankton was as much as 507 individuals / liter. The highest density of phytoplankton was found in the water column depth of 20 m, while the lowest was found at the depth of 60m. The highest density of zooplankton was found in the surface, then decreases as the depth of waters. The dominant genusof phytoplankton were Pleurosigma sp., then Rizosolenia sp., Skeletonema sp., and the least was Actinocyclus sp. The dominant species of zooplankton are Ceratium sp. then Tintinopaial sp., and nauplius sp.

KARAKTERISASI KROMOSOM SIDAT BICOLOR, Anguilla bicolor bicolor McClelland, 1844 DI WAY SEMANGKA, LAMPUNG Marlina U. Genisa; Trijoko Trijoko; Niken S.N. Handayani
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 2 (2010)
Publisher : Universitas Gadjah Mada

The eels of genus Anguilla are catadromous, their juvenile grow in estuaries, rivers and lakes, and their spawning areas being offshore in the ocean. The eels of Anguilla have high economic potency due to good taste and high protein content. Eel Anguilla bicolor bicolor has been cultured but the seed was depending on the glass eels availability from nature. However, genetic study for Anguilla bicolor bicolor in Indonesia was limited. The aim of this research was to characterize the chromosome of eel Anguilla bicolor bicolor, to be used as a basic information for conservation and aquaculture development. Chromosome preparation was done by blood culture splash method. The results revealed that the diploid chromosomes (2n) of Anguilla bicolor bicolor was 38, classiﬁed as 34 (17 pairs) of metacentric and 4 (2 pairs) of submetacentric chromosomes. Displaying karyotype formula of 2n = 38 = 34m + 4 sm.

KOMPOSISI SUMBERDAYA IKAN DEMERSAL DI PERAIRAN SELAT MALAKA Wedjatmiko Wedjatmiko
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 2 (2010)
Publisher : Universitas Gadjah Mada

Fish resources found in waters of Malacca Strait consist of shrimp, demersal ﬁsh, large pelagic ﬁsh and small pelagic ﬁsh resources. Exploitation of demersal resources in the waters of Malacca Strait is very intensive. Therefore this study was aims to determine the development of the composition of demersal ﬁsh in the waters of Malacca Straits. The study was conducted in the waters of Malacca Straits that focused around Belawan and Bengkalis, which was held in June 2008, using the KR. Bawal Putih and bottom trawl as ﬁshing gear. The result showed that 70% of ﬁsh caught is demersal ﬁsh. The composition of the dominant demersal ﬁsh caught in the waters of Malacca Strait was different between Belawan and Bengkalis waters. In the Belawan waters, 3 most dominant demersal ﬁsh species caught were goats ﬁsh (Mullidae), squid (Loligonidae) and lizard ﬁsh (Synodontidae), while in Bengkalis waters, 3 most dominant demersal ﬁsh species caught were croackers ﬁsh (Scianidae), grunters ﬁsh (Pomadasidae) and stingrays (Dasyatidae). The difference in species composition of demersal ﬁsh in Belawan and Bengkalis waters, caused by differences in characteristics of the aquatic environment.

RECRUITMENT MECHANISM OF THE TROPICAL GLASS EELS GENUS ANGUILLA IN THE POSO ESTUARY, CENTRAL SULAWESI ISLAND, INDONESIA Hagi Y. Sugeha
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 2 (2010)
Publisher : Universitas Gadjah Mada

In order to understand recruitment mechanism of the tropical anguillid glass eels in the Poso Estuary, Central Sulawesi Island, Indonesia, a year quantitative sampling ﬁeld was conducted from May 2008 to April 2009. About 11181 specimens of glass eels were ﬁshed using line transects method of two triangular scoop nets through 13 times of new moon and 1761 specimens were preserved for examined in the laboratory. It was found that recruitment of glass eels occurred almost throughout the year of investigation and peak of recruitment occurred in August. Anguilla celebesensis and Anguilla sp. nov 1 were recruited in dry season, A. marmorata recruited in dry and rainy seasons, while A. interioris, A. bicolor paciﬁca and Anguilla spp. nov 2 recruited only in rainy season. Anguilla celebesensis (69.17%) was the most dominant species recruited in the estuary followed by A. marmorata (23.54%), Anguilla spp nov 1 (4.99%), Anguilla spp nov 2 (2.03%), A. interioris (0.14%) and A. bicolor paciﬁca (0.04%). The onset of recruitment as well as ﬂuctuation of abundance of the tropical anguillid glass eels into Poso estuary were strongly associated with seasonal and circadian rhythmic as well as tidal and lunar cycles that occurred in the central Indonesian regions.

INFEKSI DAN PATOLOGI PARASIT Actinocleidus sp. (MONOGENEA) PADA INSANG IKAN LELE DUMBO, Clarias gariepinus Hilal Anshary
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 2 (2010)
Publisher : Universitas Gadjah Mada

The aims of this research were to study level of infection of the monogenean parasite Actinocleidus sp. and its pathological effects on the gills of Catﬁsh ( Clarias gariepinus). This research was conducted in April to June 2008 at several Catﬁsh culture localities in Makassar and Maros, South Sulawesi. The ﬁsh were chategorized in three different ages group, i.e. small (5 < x ≤ 10 cm), middle (10 < x ≤15 cm) and large (x ≥15 cm). The totals of 270 ﬁsh were examined with 9 times frequency of sampling conducted every week.Prevalence of Actinocleidus sp. infection at the three culture facilities was very high (100%). Mean intensity at small, middle and large ﬁsh cultured in Adhyaksa were 85.9, 93.2 and 55.2, respectively. In Arief Rate, the mean intensity of infection at small, middle and large ﬁsh were 17.5, 15.1 and 7.2, respectively, whereas in Maros the mean intensity of infection were 56.7, 64.7 and 40.9, respectively. There was a high signiﬁ cant difference of mean intensity between small, middle and large ﬁsh (P < 0.01). Pathological effects of the parasite Actinocleidus sp. on gills showed some damages, i.e. distal and basal hyperﬂ asia, fusion and overstimulated of mucus production. The high prevalence and mean intensity of the parasite infection indicating the worse culture management system applying by the Catﬁsh farmers as well as by the high stocking density of the ﬁsh. The lower mean intensity of infection seen in the larger ﬁsh might be indicating that the larger ﬁsh had already developed immune system than the small ones.

ANALISIS PARAMETER OSEANOGRAFI UNTUK PENENTUAN HABITAT IKAN PELAGIS DI PERAIRAN PAPARAN SUNDA Mutiara R. Putri; Fitri Suciaty
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 2 (2010)
Publisher : Universitas Gadjah Mada

In order to determine the regions in the Indonesia waters that are suitable for small pelagic fish habitat, analysis of net primary productivity (NPP) that is associated with oceanographic conditions has been carried out in this study. The NPP values derived from satellite data were calculated using the Vertically Generalized Productivity Model (VGPM). Meanwhile, the oceanographic conditions which are represented by temperature, salinity, and ocean currents were obtained by using a hydrodynamics numerical model. The result of this analysis was then compared with available acoustic observations. The results show that NPP in the Sunda Shelf Waters have different variations. The NPP along the southern coast of Kalimantan in the Java Sea and Centre Part of Malaka Strait around the Riau Waters always high throughout the year, i.e. more than 1000 mgC/m²/day and 750 mgC/m²/day, respectively. Variations in NPP values were strongly inﬂ uenced by seasonal variation of oceanographic conditions, which would physically affect the living habitat of pelagic fish in the Sunda Shelf. During the east monsoon, the salinity and temperature in the Eastern Java Sea and Makassar Strait were very suitable for pelagic fish, i.e. from 32 to 33 psu and 27 to 28°C, respectively. Meanwhile, during the east monsoon, the condition becomes less suitable. By contrast, in the Malaka and Karimata Straits, the oceanographic conditions during the west monsoon were more suitable, with almost similar mixed layer depth, i.e. 5 meters.

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