. Yonvitner, .
Departemen Manajemen Sumberdaya Perairan, FPIK-IPB, Bogor.

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ON SEAWEED CULTURE BASED COASTAL AREA DEVELOPMENT IN WEST SUMBAWA REGENCY Nuryadin, Rusmin; Soewardi, Kadarwan; Yonvitner, .
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 7, No 1 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Seaweed cultivation is one of current coastal development activities in the west Sumbawa regency. Coastal region in the west Sumbawa regency that be used for seaweed cultivation was about 1,550 ha, however, its utilization was still limited of about 536 ha (34.58%). Seaweed farming activities were only carried out in some locations of the subdistrict of Taliwang and Pototano, west Sumbawa. Sustainability analysis of seaweed cultivation was done by Multidimensional scaling method using Rapid Appraisal Seaweed (Rapseaweed). Based on sustainability status of seaweed cultivation, the long line methods was less sustainable with sustanability index of 49.28 and the ‘anchored’ method produced better sustainability of 61.02 index value. A technological dimension is needed for seaweed farming development in order to produce better sustainability. Other dimensions for seaweed farming improvement are ecological, economic, social, and institutional. To reach a sustainable seaweed cultivation in the west Sumbawa regency, farmers and other stake holders should increase the utilization of available coastal region for seaweed farming activities by having the availability of the market and seeds, guarantees access to capital, increasing skills and knowledge of farmers, provide the drying and storage facilities, and  develop the seaweed processing industry. Keywords: seaweed, value index, sustainability status, Rapseaweed
VARIABILITY OF CARAPACE WIDTH SIZE AND ABUNDANCE OF BLUE SWIMMING CRABS (Portunus pelagicus Linnaeus) IN PATI WATERS Nugraheni, Dyah Ika; Fahrudin, Achmad; Yonvitner, .
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 7, No 2 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Fishing effort enhancement would put pressure on blue swimming crab resources and its ecosystem. The objective of this study was to determine the spatial distribution based on the size of the carapace width (CW), abundance, temperature, salinity, depth, and fishing intensity in Pati waters which was divided into two zones (zones 1=nearshore, zone 2=offshore). The result showed that the average of carapace width in zone 1 to zone 2 was significantly different (p <0.05), as well as between males and females. Average number of individual (abundance) was significantly different according to fishing areas and sex (p <0.05). The average of water temperature in zone 1 was higher than in zone 2, salinity in zone 1 was smaller than in zone 2, and the water depth in zone 1 was shallower than in zone 2. The higher the crab catch intensity leaded to the smaller the abundance and size of carapace width. Alternative management strategies were proposed such as to divert fishing grounds from coastal waters to offshore during low productivity season, to uphold rules on minimum legal size for catching (Lm = 107 mm),  to release of berried females catch, and to reduce accretion rate of gear and fishing fleet mainly in the coastal zone waters.Keywords:  blue swimming crab, carapace widht (CW), abundance, intensity of fishing
Pengelolaan Sumber Daya Perikanan Banggai Cardinalfish (Pterapogon kauderni, Koumans 1933) Dengan Pendekatan Ekosistem (Studi Kasus Pulau Banggai Kabupaten Banggai Laut) Adel, Yeldi; Yonvitner, .; Rahardjo, Muhammad Fadjar
Jurnal Ilmu Pertanian Indonesia Vol 21, No 3 (2016): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1301.4 KB) | DOI: 10.18343/jipi.21.3.186

Abstract

The Banggai cardinalfish (Pterapogon kauderni) is endemic to the Banggai Archipelago. The conservation status of Pterapogon kauderni in the IUCN Red List of Threatened Species is Endangered, Pterapogon kauderni is considered to be threatened with extinction due to excessive exploitation as well as threats to it’s habitat in shallow coastal waters of 0-5 m depth. The aim of this research was to evaluate this fisheries resource using ecosystem-based indicators and to formulate fisheries management measures using an ecosystem-based approach. The six domains used in this evaluation were the fisheries resource domain, habitat and ecosystem, fishing technology, social, economic, and institutional, using a specific set of indicators for each domain. The evaluation produced the following overall, mean, and highest indicator values and domain categories; 3.226.40, 2.33 and 4.204.12 for the fisheries resource domain, poor category; 4.020.80, 2.17, 5.282.36 for the habitat and ecosystem domain, average category; 4.000, 2.00, 6.000 for the fishing technology domain, average category; 6.685, 2.33, 8.505 for the social domain, category; 2.001.74, 1.50 and 3.005.17 for the economic domain, poor category; and 3.041.38, 2.17, 4.564.12 for the institutional domain, average category
Rasio biomasa dan kelimpahan makrozoobenthos sebagai penduga tingkat pencemaran di teluk jakarta Yonvitner, .; Imran, Zulhamsyah
Jurnal Ilmu Pertanian Indonesia Vol 11, No 3 (2006): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

The monitoring technic  using  aquatic  organism  as bio indicator was  more  advance.    Monitoring of  water  quality conduct   with  biological indicator among   macrobentic biomass  and  green  mussel  population were  intensively used  by researcher. These research was consider  that  water  quality damage on Jakarta  bay might be identity with biomass analysis approach.   Benthic  organism used as sample  were  macrozoobenthos and green  mussel (Pema viridis).  Water  quality was analysed  using  Fsawb  (Fish and Wild  Life Method) index  from  ott. 1979, then  for  biomass  model  was analysed  by dominant cumulative curve.   Result  of this  research  showed  that  Fsawl index  average  was 64.99, that  its  value  was unappropriate for fishes.   The analysis  of abundance and biomass  comparison index  was tend  to increase  the  density, while the biomass was decrease.   The results  indicate that  water  body  was  already  polluted.  The si:: nificant  impact for  mussel of  pollution was appear on water column at 2 m under of sea level.
COMMUNITY STRUCTURE OF GROUPER FISH (Serranidae) LANDED IN PEUKAN BADA SUBDISTRICT, ACEH PROVINCE Astuti, Rika; Yonvitner, .; Kamal, M. Mukhlis
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 8, No 1 (2016): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitkt.v8i1.12497

Abstract

ABSTRACTInformation on important and economic grouper fish (Serranidae family) in Peukan Bada waters, Province of Aceh is very limited. This objecives of this research were to determine spatial and temporal variabilities in species composition and community structure of grouper landed in Peukan Bada, Aceh Besar District. The research was conducted using survey method during February to June 2015 on three fish landing sites i.e., Ujong Pancu, Lamtengoh, and Lamteh. The groupers were caught by using handline. The landed fishes were therefore counted and identified up to species level. The data were also analyzed based on taxonomic information and individual number of each species, community structure using the diversity index (H’), eveness (E), and dominance (D). The results obtained 835 individual, 21 species of grouper belong to 4 genera (Aethaloperca, Cephalopholis, Epinephelus dan Variola). Based on species, Epinephelus fasciatus and Cephalopholis sonnerati were the most grouper fishes in the region.  Based on community structure, diversity value (H’) in Lam-tengoh was higher than that in Ujong Pancu and Lamteh. Total grouper fish catches were not significantly different (P>0,05) among the three region. Meanwhile, total grouper fish cacthes were significantly different between seasons (p<0,05). The diversity species variation during five months of observation was affected by the differences in catches area, the condition of aquatic enviroment, and oceanographic condition.Keywords: Groupers, Peukan Bada, species composition, community structure
WATERS CARRYING CAPACITY FOR DEVELOPMENT OF SEAWEED CULTURE OF Eucheuma cottonii IN LUWU AND PALOPO DISTRICTS, BONE BAY, SOUTH SULAWESI Waluyo, .; Yonvitner, .; Riani, Etty; Arifin, Taslim
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 8, No 2 (2016): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitkt.v8i2.15802

Abstract

In seaweed Eucheuma cottonii cultures, a water carrying capacity is an important factor to optimize the seaweed culture. Carrying capacity can be determined by an ecological footprint production (EFp) analysis. This research was conducted in May 2015 (1st transitional season) and September 2015 (2nd transitional season) in Luwu and Palopo distircts, South Sulawesi. Map and land use were analyzed using GIS (Geographic Information Systems). The result showed that the ecological foot-print production (EFP) in Luwu waters was 67.88 ton/capita/year or equivalent to 235,823.93 tons/ year. However, based on the analysis of the water availability for seaweed was 59,781.79 hectares, it can produce seaweed (biocapacity) for 1,437,779.60 tons/year and the number of farmers that allows for use the waters is 21,432 capita. The ecological footprint  production (EFp) in Palopo waters is 3.08 ton/capita/year, or equivalent to 4,589.99 tons/year. Water availability analysis is 1,771. 41 hectares are able to produce seaweed (biocapacity) for  18,287.46 ton/year and the number of far-mers that allows for use the waters is 635 farmers capita. The results comparison between biocapa-ci-ty and ecological footprint, ecological status for  Luwu and Palopo waters are still in sustainable use.
BIODIVERSITY AND ABUNDANCE OF DEMERSAL FISHS STOCK IN TAMBELAN WATER, NATUNA SEA Fahmi, .; Yonvitner, .
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 8, No 2 (2016): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitkt.v8i2.15807

Abstract

Understanding on fish diversity is essential for fish stock conservation specifically in Tambelan Island waters with a high fish diversity. This research was conducted in November 2010 at 6 sampling site around Tambelan Island. Samples were taken using trawl gear within sweeping technique. The para-meters of collected data were kind of species, number of fish, total length, and total weight. Data analyses were stock abundance (based on time trawling), diversity, richness, equity, and similarity between site sampling. The total fishes that were caugth were 1.224 individual that consisted of 105 species and 44 family of fishes. Total weight of sample was 55.3 kg, with the average stock abundance 0.27 kg/hour. Fishes catch composition were Apogonidae family 11,4%, Mulliidae family 35.7%, Nemipteridae family 16.3%, and Lutjanidae family 7,7%.  Richness value index ranged of 1862 –3.121. Equitability index ranged of 0.329 – 0.576.  Similarity index for station 3 and 6 was at 33.89% level; for station 1, 4, and 5 was at 20.31 % level,  and for station 4 and 5 was at 45,30% level from the maximum value of 100%.
CARRYING CAPACITY OF EAST BEACH OF BULUKUMBA REGENCY FOR MARINE TOURISM ACTIVITIES Wahyuni, Andi Panca; Yonvitner, .; Setyobudiandi, Isdradjad
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 9, No 1 (2017): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitkt.v9i1.17924

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The purpose of the study was to assess the carrying capacity of  East Beach of Bulukumba Regency for tourism activities. East Beach was obtained three marine tourism activities namely beach tourism of recreation, snorkeling and diving. Coastal tonamelyurism/recreation categories according to the total length area that utilized around 1.696  m can accommodate 68 people/day, snorkeling tourism around  71.605 m² can accommodate 286 people/day and diving tourism around 98.534  m²  is able to accommodate 394 people/day. Thus the total tourist that can fit to the overall tourism activity around 748 people/day. Keywords : carrying capacity, marine tourism, east beach, Bulukumba regency
ANALISIS DEGRADASI DAN DEPRESIASI SUMBERDAYA IKAN DEMERSAL PADA PERIKANAN DOGOL DI PERAIRAN SELAT SUNDA (Degradation and Depreciation Analysis of Demersal Fish Resources on Dogol Fisheries in Sunda Strait) Oktaviyani, Selvia; Boer, Mennofatria; Yonvitner, .
Marine Fisheries : Journal of Marine Fisheries Technology and Management Vol 6, No 2 (2015): Marine Fisheries - November 2015
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (499.641 KB) | DOI: 10.29244/jmf.6.2.119-128

Abstract

ABSTRACTDogol is one type of fishing gear which is operated by fisherman in Sunda Strait with demersal fishes as dominant catches, such as goatfish, threadfin brean, ponyfish, Indian halibut and drums.The utilization was done throughout the year and without control can lead to overfishing. The aim of this research is to estimate degradation and the depreciation rate of demersal fish resources of dogol fisheries in Sunda Strait. This research was conducted on February until July 2014 in Coastal Fishing Port (PPP) Labuan, Pandeglang, Banten. Data was collected through interview and questionnaire methods to dogol fisherman and other stakeholders, as well as time series data from Ministry of Marine Affairs Pandeglang district. The results showed that the average value of degradation and depreciation rate of demersal fish resources were 0,26-0,42 and 0,26-0,43 respectively. Those values still below 0,5, it means that demersal fish resources on dogol fisheries in Sunda Strait has not been degraded and depreciation. But, the CPUE values tended to decrease, so was needed preventive action, such as restriction of fishing effort and increase the mesh size to preserve the sustainability of demersal fish resources.Keywords: Degradation, demersal fish, depreciation, dogol, Sunda StraitABSTRAKDogol merupakan salah satu jenis alat tangkap yang dioperasikan oleh nelayan di Perairan Selat Sunda dengan hasil tangkapan dominan yaitu ikan demersal seperti ikan biji nangka, kurisi, peperek, sebelah dan tigawaja. Kegiatan pemanfaatan yang dilakukan sepanjang tahun dengan tidak adanya pengontrolan dapat mengakibatkan tangkap lebih. Tujuan penelitian ini adalah untuk mengetahui laju degradasi dan laju depresiasi sumberdaya ikan demersal pada perikanan dogol di Perairan Selat Sunda. Penelitian dilaksanakan pada bulan Februari hingga Juli 2014 di Pelabuhan Perikanan Pantai (PPP) Labuan, Pandeglang, Banten. Pengumpulan data dilakukan melalui metode wawancara dan kuisioner terhadap nelayan dogol dan stakeholder lainnya serta data time series perikanan tangkap DKP Kabupaten Pandeglang. Hasil menunjukkan bahwa sumberdaya ikan demersal memiliki pola produksi yang berfluktuasi. Rata-rata nilai koefisien degradasi dan depresiasi sumberdaya ikan demersal adalah 0,26-0,42 dan 0,26-0,43 secara berurutan. Nilai-nilai tersebut masih dibawah 0,5, artinya sumberdaya ikan demersal pada perikanan dogol di Perairan Selat Sunda diduga belum mengalami degradasi dan depresiasi. Namun, nilai CPUE cenderung mengalami penurunan, sehingga diperlukan tindakan preventif seperti pembatasan upaya tangkap dan peningkatan ukuran mata jaring untuk menjaga kelestarian sumberdaya ikan demersal.Kata kunci: Degradasi, ikan demersal, depresiasi, dogol, Selat Sunda
KELIMPAHAN ZOOPLANKTON DAN BIOMASSA IKAN TERI (Stolephorus spp.) PADA BAGAN DI PERAIRAN KWATISORE TELUK CENDERAWASIH PAPUA (Abundance of Zooplankton and Biomass of Anchovy (Stolephorus spp.) of Liftnet at Kwatisore Bay, Cendrawasih Gulf, Papua) Dinisia, Amelian; Adiwilaga, Enan M.; Yonvitner, .
Marine Fisheries : Journal of Marine Fisheries Technology and Management Vol 6, No 2 (2015): Marine Fisheries - November 2015
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (736.646 KB) | DOI: 10.29244/jmf.6.2.143-154

Abstract

ABSTRACTMillions of organisms can be found in the Cenderawasih Gulf National Park area, especially in the waters of the Kwatisore Bay, Nabire and has been well-known to almost all over the world. Large zooplankton is an important food for migrated fish larvae and all kinds of fish including anchovies. Anchovy is the food of large and small pelagic fish groups. Groups of fish that use plankton as food were included anchovy. The main catch product of lift net at the Kwatisore bay is anchovy (Stolephorus spp.). This study aims to assess the level of availability of anchovy in relation to the abundance of zooplankton as food and to analyze the influence of anchovy fishing activities with lift net fishing gear. The results were obtained 51 species of zooplankton, which consists of 44 types holoplankton and 7 types of meroplankton. There were 17 species of zooplankton were found in the stomach of anchovy with the subgroup dominated by copepods (73.51 %). Among 17 species of zooplankton there 2 types that were found in all four sampling periods, namely Calanus sp. 2 and Euterpina acutifrons. There is a relationship between the abundance of individual zooplankton in the waters of the anchovy biomass and also between the abundance of zooplankton and biomass of anchovy.Keywords: abundance of zooplankton, biomass of anchovy, lift net at Kwatisore-------ABSTRAKJutaan organisme dapat ditemukan dalam kawasan Taman Nasional Teluk Cenderawasih khususnya di perairan Kwatisore, Nabire dan telah terkenal sampai hampir ke seluruh dunia. Zooplankton berukuran besar merupakan makanan penting bagi ikan-ikan yang bermigrasi dan larva semua jenis ikan termasuk didalamnya ikan teri. Ikan teri merupakan makanan dari kelompok ikan pelagis besar dan kecil. Kelompok ikan-ikan yang banyak memanfaatkan plankton dari kelompok ikan pelagis kecil diantaranya ikan teri. Hasil tangkapan utama bagan penangkap ikan pelagis kecil di perairan Kwatisore ialah jenis teri (Stolephorus sp.). Tujuan penelitian ini adalah untuk mengkaji tingkat ketersediaan ikan teri dalam kaitannya dengan kelimpahan zooplankton sebagai makanannya serta menganalisis pengaruh dari aktivitas penangkapan ikan teri dengan alat tangkap bagan. Secara keseluruhan dari seluruh stasiun dalam setiap periode sampling, diperoleh 51 jenis zooplankton yang terdiri atas 44 jenis holoplankton dan 7 jenis meroplankton. Terdapat 17 jenis zooplankton yang ditemukan dalam lambung ikan teri dengan didominasi oleh Sub-grup Copepoda (73,51%). Diantara ke-17 jenis zooplankton tersebut terdapat 2 jenis yang ditemukan pada keempat periode sampling yaitu Calanus Sp.2 dan Euterpina acutifrons. Hasil analisis regresi linier antara biomassa ikan teri hasil tangkapan bagan dan kelimpahan maupun antara biomassa ikan teri hasil tangkapan bagan dan jumlah jenis zooplankton menunjukkan adanya korelasi positif.Kata kunci: kelimpahan zooplankton, biomassa ikan teri, bagan di Kwatisore