ASPEK BIOLOGI UDANG BERAS MERAH (Metapenaeopsis barbata) di PERAIRAN UTARA KABUPATEN BATANG DAN PEMALANG, JAWA TENGAH (Biological Aspect of Whiskered Velvet Shrimp  (Metapenaeopsis barbata) in North of Batang and Pemalang Disctrict Seas)

Kegiatan penangkapan ikan di Pantai utara Provinsi Jawa Tengah yang terus meningkat dan penggunaan alat tangkap yang tidak selektif oleh nelayan akan mempengaruhi jumlah stok udang di perairan. Tujuan penelitian ini adalah untuk mengkaji dan membandingkan aspek-aspek biologi Udang Beras Merah (Metapenaeopsis barbata) yang meliputi aspek pertumbuhan dan reproduksi menurut perbedaan waktu pengambilan sampel (temporal) dan perbedaan perairan daerah penangkapan (spasial). Penelitian dilaksanakan pada bulan Februari – April 2017 di Kabupaten Batang dan Pemalang. Metode yang digunakan dalam pengambilan sampel menggunakan systematic random sampling. Hasil sampling yang dilakukan di Kabupaten Batang dan Pemalang menunjukkan panjang total udang M. barbata yang tertangkap berkisar pada ukuran 40 – 106 mm dan 52 – 118 mm. Pola pertumbuhan M. barbata yang tertangkap di Kabupaten Batang bersifat allometrik negatif, sedangkan udang yang didaratkan di Kabupaten Pemalang bersifat allometrik positif. Nilai faktor kondisi pada udang M. barbata yang didaratkan di Kabupaten Batang dan Pemalang selama penelitian adalah 1,908 dan 1, 584. Ukuran udang M. barbata yang pertama kali tertangkap di Kabupaten Batang dan Pemalang adalah 63 mm dan 88 mm. Rasio perbandingan nisbah kelamin Udang M. barbata jantan dan betina yang tertangkap selama penelitian sebesar 1 : 2,11. Udang M. barbata yang didaratkan di Kabupaten Pemalang pertama kali mengalami matang gonad pada ukuran panjang total 94,2 mm. Upaya untuk mempertahankan tersedianya stok spesies M. Barbata adalah dengan mengatur intensitas eksploitasi sumberdayanya dan ukuran mata jaring alat tangkap arad agar diperbesar menjadi ukuran 1,75 inchi. Pendataan jumlah produksi dan trip alat tangkap udang M. barbata penting untuk dilakukan, dengan tujuan pemerintah daerah tetap bisa memantau intensitas eksploitasi yang dilakukan nelayan. Fishing activities on the North Coast of Central Java Province are increasing and the using of fishing gear which is not selective by fishermen will affect the amount of shrimp stock in the waters. The purpose of this research was to examine and compare the biological aspects of Whiskered Velvet Shrimp (M. barbata) which are growth and reproduction aspects according to differences in timing of sampling (temporal) and different fishing ground (spatial). The research was conducted on February to April 2017 in Batang and Pemalang districts. The method used systematic random sampling. The results of the sampling carried out in Batang and Pemalang shows the total length caught M. barbata range in size of 40-106 mm and 52-118 mm. The growth pattern M. barbata caught in Batang is allometric negative, while the shrimp landed in Pemalang are positive allometric. The value of the condition factor on M. barbata landed in Batang and Pemalang District during the study was 1.1688 and 1.0618. The average size of M. barbata first caught in Batang and Pemalang District is 63 mm and 88 mm. The ratio of sex ratio of male and female M. barbata caught during the study was 1: 2,11. Red Rice Prawns are landed in Pemalang District first experience mature gonads at a total length of 94.2 mm. The effort to maintain the availability of stock of the species M. barbata is to adjust the intensity of exploitation of resources and setting the mesh size of fishing gear in order arad (small bottom trawl) enlarged to a size of 1.75 inches. Documenting the amount of production and the number of trips M. barbata fishing tools necessary to do, with the aim is the local government can still monitor the intensity of exploitation of fishermen.

Download Full-text

Stability analysis of trawls type traditional fishing boat with modification of eco-friendly fishing-gear on the north coast of Central Java

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/403/1/012052 ◽

2018 ◽

Vol 403 ◽

pp. 012052

Author(s):

Kiryanto ◽

M Ridwan ◽

B A Adietya ◽

D Chrismianto

Keyword(s):

Stability Analysis ◽

North Coast ◽

Fishing Gear ◽

The North ◽

Fishing Boat ◽

Central Java ◽

Traditional Fishing

Download Full-text

ANALISIS EKONOMI ALAT PENANGKAPAN IKAN ARAD DI PANTAI UTARA PROVINSI JAWA TENGAH

Jurnal Sosial Ekonomi Kelautan dan Perikanan ◽

10.15578/jsekp.v1i1.8492 ◽

2020 ◽

Vol 1 (1) ◽

pp. 1

Author(s):

Benny Osta Nababan, S.Pi, M.Si ◽

Tridoyo Kusumastanto ◽

Luky Adrianto ◽

Achmad Fahrudi

Keyword(s):

Economic Analysis ◽

Secondary Data ◽

Economic Benefits ◽

Primary Data ◽

North Coast ◽

Fishing Gear ◽

The North ◽

Central Java ◽

The Republic ◽

Central Java Province

Arad termasuk dalam kelompok alat penangkapan ikan yang dilarang berdasarkan Peraturan Menteri Kelautan dan Perikanan Republik Indonesia Nomor. 2/Permen-Kp/2015 tentang larangan penggunaan alat penangkapan ikan pukat hela (trawls) dan pukat tarik (seine nets) di wilayah pengelolaan perikanan negara Republik Indonesia. Penelitian ini bertujuan untuk mengkaji secara ekonomi alat penangkapan ikan arad dengan yang dikombinasikan dengan alat penangkapan ikan lainnya di Pantai Utara Jawa Tengah. Jenis data yang digunakan adalah data primer dan data sekunder. Pengumpulan data primer dilakukan melalui wawancara kepada nelayan arad yang menggunakan kapal berukuran kurang dari 10 GT dengan menggunakan panduan wawancara serta pengamatan lapangan. Pengumpulan data sekunder dilakukan ke instansi pemerintah seperti Dinas Kelautan dan Perikanan Jawa Tengah dan BPS. Metode analisis data yang digunakan adalah analisis kelayakan usaha. Hasil penelitian menunjukan bahwa sebagian nelayan arad memiliki alat penangkap ikan lain seperti sudu, gillnet dan trammel net. Penggunaan alat penangkapan ikan berdasarkan musim ikan, seperti musim cumi, teri, kakap, belanak, kembung dan lainnya. Penelitian ini mengelompokkan nelayan berdasarkan jumlah alat penangkapan ikan yang dimiliki yaitu satu alat penangkapan ikan (arad), dua alat penangkapan ikan (arad dan sudu), tiga alat penangkapan ikan (arad, trammel net dan gillnet). Nelayan yang memiliki alat penangkapan ikan tambahan selain arad memperoleh keuntungan yang lebih tinggi dibandingkan hanya memiliki satu alat penangkapan ikan (arad). Kombinasi alat penangkapan ikan yang ramah lingkungan menggunakan 3 alat penangkapan ikan yaitu arad, gillnet dan trammel net sesuai musim ikan memberikan manfaat ekonomi yang lebih tinggi dibandingkan dengan penggunaan arad sepanjang tahun.Title: An Economic Analysis of ‘Arad’ Fishing Gear In the North Coast of Central Java Province Arad is an abandoned fishing gear based on the Regulation of the Minister of Maritime Affairs and Fisheries of the Republic of Indonesia Number 2 / Permen-Kp / 2015 concerning the prohibition on the use of trawls and seine nets in the territory of the Republic of Indonesia fisheries management. This study aimed at economic analysis of Arad capture fisheries (1 tool) compared with the capture using combination of Arad and other fishing equipment on the North Coast of Central Java. The study used primary and secondary data that were collected in the North Coast of Central Java. Primary data were collected through interviews and observation with Arad fishers working on boat under 10 GT. Secondarydata were collected from government agencies such as Marine and Fisheries Agency of Central Java and Statistics Indonesia. The results showed that some of the Arad fishers had other fishing gear such as blade, gillnet and trammel net. The use of fishing gear depended on fish season, such as squid, anchovies, snapper, mullet, bloating and others. This study classified fishers based on the number of fishing gear that fisher's had, namely, one fishing gear (arad), two fishing gear (arad and blade), three fishing gear (arad, trammel net and gillnet). Fishers having additional fishing gear get higher profits compared to those having only one fishing gear (ARAD). The use of 3 fishing gear namely arad, gillnet and trammel net according to fish season provides higher economic benefits compared to Arad only throughout the year.

Download Full-text

ANALISIS EKONOMI ALAT PENANGKAPAN IKAN ARAD DI PANTAI UTARA PROVINSI JAWA TENGAH

Jurnal Sosial Ekonomi Kelautan dan Perikanan ◽

10.15578/jsekp.v15i1.8492 ◽

2020 ◽

Vol 15 (1) ◽

pp. 1

Author(s):

Benny Osta Nababan, S.Pi, M.Si ◽

Tridoyo Kusumastanto ◽

Luky Adrianto ◽

Achmad Fahrudi

Keyword(s):

Economic Analysis ◽

Secondary Data ◽

Economic Benefits ◽

Primary Data ◽

North Coast ◽

Fishing Gear ◽

The North ◽

Central Java ◽

The Republic ◽

Central Java Province

Download Full-text

Kampungs and Conflict in Colonial Semarang

Journal of Southeast Asian Studies ◽

10.1017/s0022463400000564 ◽

1988 ◽

Vol 19 (2) ◽

pp. 266-291 ◽

Cited By ~ 13

Author(s):

James L. Cobban

Keyword(s):

Nineteenth Century ◽

Twentieth Century ◽

The United States ◽

City Council ◽

Economic Life ◽

North Coast ◽

The North ◽

Central Java ◽

The Government ◽

The City

By the beginning of the twentieth century, Semarang was a major port city and administrative centre on Java. Attainment of this position was due partly to the expansion of its hinterland during the nineteenth century. This expansion was closely related to developments in the means of transportation and the consequent ability of plantation owners to bring the products of their plantations to the port for shipment to foreign markets. By the end of the century virtually the whole economic life of central Java focused upon Semarang. The city also exercised administrative functions in the Dutch colonial administration and generally had been responsible for Dutch interests in the middle and eastern parts of the island. The importance of Semarang as an administrative centre increased after 1906. In that year the government incorporated the city as an urban municipality (stadsgemeente). In 1914 it had consular representation from the United States, Belgium, Denmark, France, Great Britain, Italy, Norway, Germany, and Thailand. Subsequently, in 1926 it became the capital of the Province of Central Java under the terms of an administrative reform fostered by the colonial government at Batavia. Status as an urban municipality meant that local officials sitting on a city council would govern the domestic affairs of the city. The members of the city council at first were appointed from Batavia, subsequently some of them were elected by residents of the city. By the beginning of the twentieth century Semarang had enhanced its position as a major port on the north coast of the island of Java. It was one of the foremost cities of the Dutch East Indies, along with Batavia and Surabaya, a leading port and a centre of administration and trade. This article outlines the growth of the port of Semarang during the nineteenth century and discusses some of the conflict related to this growth over living conditions in parts of the city during the twentieth century, a conflict which smouldered for several decades among the government, members of the city council, and the non-European residents of the city, one which remained unresolved at the end of the colonial era.

Download Full-text

MONITORING OF MANGROVE GROWTH AND COASTAL CHANGES ON THE NORTH COAST OF BREBES, CENTRAL JAVA, USING LANDSAT DATA

International Journal of Remote Sensing and Earth Sciences (IJReSES) ◽

10.30536/j.ijreses.2019.v16.a3221 ◽

2020 ◽

Vol 16 (2) ◽

pp. 197

Author(s):

Tri Muji Susantoro ◽

Ketut Wikantika ◽

Lissa Fajri Yayusman ◽

Alex Tan ◽

M. Firman Ghozali

Keyword(s):

Coastal Area ◽

Vegetation Index ◽

Series Data ◽

North Coast ◽

Landsat Data ◽

Coastal Change ◽

The North ◽

Central Java ◽

Normalised Difference Vegetation Index ◽

Coastal Changes

Severe abrasion occurred in the coastal area of Brebes Regency, Central Java between 1985 and 1995. Since 1997, mangroves have been planted around the location as a measure intended to prevent further abrasion. Between 1996 and 2018, monitoring has been carried out to assess coastal change in the area and the growth and development of the mangroves. This study aims to monitor mangrove growth and its impact on coastal area changes on the north coast of Brebes, Central Java Province using Landsat series data, which has previously proven suitable for wetland studies including mangrove growth and change. Monitoring of mangrove growth was analysed using the normalised difference vegetation index (NDVI) and the green normalised difference vegetation index (GNDVI) of the Landsat data, while the coastal change was analysed based on the overlaying of shoreline maps. Visual field observations of WorldView 2 images were conducted to validate the NDVI and GNDVI results. It was identified from these data that the mangroves had developed well during the monitoring period. The NDVI results showed that the total mangrove area increased between 1996 and 2018 about 9.82 km2, while the GNDVI showed an increase of 3.20 km2. Analysis of coastal changes showed that the accretion area about 9.17 km2 from 1996 to 2018, while the abrasion being dominant to the west of the Pemali River delta about 4.81 km2. It is expected that the results of this study could be used by government and local communities in taking further preventative actions and for sustainable development planning for coastal areas.

Download Full-text

The demersal fish composition and catch per unit effort of mini bottom trawl at the coast of Demak Regency Central Java

E3S Web of Conferences ◽

10.1051/e3sconf/202132203006 ◽

2021 ◽

Vol 322 ◽

pp. 03006

Author(s):

Naliyana Fitriya ◽

Nahlah Alfiatuunisa ◽

Suwarman Partsuwiryo ◽

Eko Setyobudi

Keyword(s):

Demersal Fish ◽

Bottom Trawl ◽

North Coast ◽

Catch Per Unit Effort ◽

The North ◽

Central Java ◽

Unit Effort ◽

Trichiurus Lepturus ◽

Trawl Fishing ◽

Trawl Catches

Demak is a coastal area on the North Coast of Java with a large enough potential for demersal fish resources. This research aimed to determine the composition, the length and weight distribution, and catch per unit effort (CPUE) of demersal fish caught using mini bottom trawl at the north coast of Demak Regency. The research was carried out in October-December 2020 by observation of ten trips of mini bottom trawl fishing. Each fish captured was then grouped by type, identified, and measured its length and weight. The result showed that 38 species consist of 31 fishes, four mollusks, and three crustaceans. The fish captured dominated by pony fish (Leiognathus equulus) as much as 31.23% and largehead hairtail (Trichiurus lepturus) of 23.52%. The catch per unit effort (CPUE) average of mini bottom trawl was 44.77 kg/trip. Mainly fish (more than 95%) caught in small size compared it’s the maximum attainable length (L-max), with all the weight ranges from 0.3 to 520 g and more than 98% sized 0.3-80 g. Mini bottom trawl catches many types of fish and small size; therefore, mini bottom trawl is classified as a type of fishing gear with a very low selectivity level.

Download Full-text