scholarly journals Fish stock estimation in Sikka Regency Waters, Indonesia using Single Beam Echosounder (CruzPro fish finder PcFF-80) with hydroacoustic survey method

2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Muhammad Zainuddin Lubis ◽  
Wenang Anurogo
Keyword(s):  
Fishery Management ◽  
Data Retrieval ◽  
Acoustic Method ◽  
Horizontal Distribution ◽  
Survey Method ◽  
Fish Stock ◽  
Total Biomass ◽  
Single Beam ◽  
Fish Resources ◽  
Stock Estimation

Sikka regency waters including fishery management with a high utilization status so that the necessary stages of an intensive monitoring and research potential of fish resources. This study aimed to obtain the estimated value of stock biomass and density of fish resources with the acoustic method. Quantitative data obtained will be a source of current information on the state of fish resources in the Sikka regency waters, Indonesia. The research was conducted in May 2015. Acoustic data retrieval, using instruments CruzPro fish finder PcFF-80 with sound velocity of 1516 m / s, power 2560 Watt, and method in survey acoustic use hydroacoustic long transect. The horizontal distribution shows a fluctuation striking at research location has the highest salinity levels in the range of 29.3-29.8 psu. Total biomass of fish in this study showed more the number is at a depth of 11-20 m that is 2,008 tons/km and at a depth of 1-10 m have the total fish biomass is 12.33 tons/km, single detection is done using a single target hydroacoustic show more dominance at a depth of 11-20 m in Sikka regency waters, MTB, Indonesia in May 2015. Number of data from results obtained by looking at the relationship between the number of the data with the total biomass in 1-10 m depth has equation Y = 0.0967x + 0.0486 with R2 is 0.0464 (4%) , while at a depth of 11-20 m has a regression equation is Y = 0.0003x + 0041 with the R2 is 0.0091 (0.9%). Variations in the data or the detection of single targets have variations over the data that is at a depth of 11-20 m with the lowest regression is 0.9%.Keywords:   Hydroacoustic, Salinity, Biomass, Stock estimation, Sikka regency waters.

scholarly journals Biological parameters of fish stock estimation in Cirata Reservoir (West Java, Indonesia): A comparative analysis of bio-economic models

2017 ◽  
Vol 18 (4) ◽  
pp. 1468-1474 ◽  
Author(s):  
ZUZY ANNA ◽  
ASEP AGUS HANDAKA SURYANA ◽  
INE MAULINA ◽  
ACHMAD RIZAL ◽  
PURNA HINDAYANI
Keyword(s):  
Comparative Analysis ◽  
Sustainable Management ◽  
Economic Models ◽  
Series Data ◽  
Fish Stock ◽  
Biological Parameters ◽  
West Java ◽  
Fish Resources ◽  
Management Regimes ◽  
Stock Estimation

Anna Z, Handaka AA, Maulina I, Rizal A, Hindayani P. 2017. Biological parameters of fish stock estimation in Cirata Reservoir (West Java, Indonesia): A comparative analysis of bio-economic models. Biodiversitas 18: 1468-1474. Fish resources in reservoirs such as Cirata have a strategic value, especially for the surrounding community in terms of fulfilling the need for nutricious food, subsistence, and economic purposes. Unfortunately, until now there has been no serious attention from the government to develop and manage fish resources in these waters. From time series data it can be seen that there is a decrease in fish production, which is an indication of a decrease of fish stock, which has a negative impact on the wellfare of surrounding commmunity, as well as the sustainability of fish resources and their ecosystems. To meet the food safety and economic needs of the community, a healthy and sustainable fish resource is a must, characterized by sustainable inputs and outputs, so that the stock of fish resources will be maintained. In order to fulfill this need, a basic understanding of the biological and economic conditions of the dynamics of fish resources in these waters as a basis for sustainable management is needed. Research was conducted to calculate the biological parameters of fish resources through Fox, CYP, Walters Hilborn and Schnute algorithms, using quarterly catch and effort data from 2011 to 2015, collected from secondary and cross checking data. Furthermore, using price and cost data series, adjusted by consumer price index, the variable of input, output and economic rent of sustainable, optimal and open access management regimes were analyzed. The results of the study indicate that the most statistically appropriate model for estimating biological parameters in Cirata are the Fox and CYP models, and fisheries management using the optimal regime provides the most efficient results, where fewer inputs will result in the maximum profit. The research suggests the need for immediate enforcement of management rules based on sustainable management regimes through input or output restrictions on capture fisheries in Cirata Reservoirs.

scholarly journals KAJIAN PENANGGULANGAN IUUF PADA PERIKANAN CANTRANG DI LAUT JAWA (WPP – 712)

2014 ◽  
Vol 6 (2) ◽  
pp. 55
Author(s):  
Duto Nugroho ◽  
Suherman Banon Atmaja
Keyword(s):  
Fishery Management ◽  
Demersal Fish ◽  
Reference Points ◽  
Fish Stock ◽  
Small Scale ◽  
Fish Resources ◽  
Iuu Fishing ◽  
Data Collecting ◽  
Java Sea ◽  
Collecting System

<p>Kajian terhadap perikanan cantrang yang beroperasi di Laut Jawa dengan menggunakan perangkat pengelolaan cenderung dikategorikan sebagai perikanan akses terbuka. Penambahan armada secara historis memperlihatkan rendahnya pertimbangan terhadap pentingnya kelestarian sumber daya ikan, bebas beroperasi dan dalam banyak kasus tidak dikelola sesuai tatalaksana perikanan secara bertanggung jawab. Hasil penelitian menunjukkan sebagian besar armada cantrang dengan izin daerah melakukan penangkapan di luar batas 12 mil laut dan beroperasi di kawasan yang berdasarkan ketentuan diperuntukan bagi nelayan skala kecil yang bukan merupakan wewenang pemberi ijin armada cantrang dari panyai Utara Jawa. Studi kasus dilakukan di Pelabuhan Perikanan Tegal, ditujukan untuk menggambarkan sistem pendataan aktivitas penangkapan yang sedang berjalan. Hal ini berkaitan dengan sistem pencatatan data dan informasi perikanan setempat memiliki kemampuan dan kapasitas terbatas terutama pada sistem pemantauan, pengendalian dan pengawasan untuk melaksanakan pengelolaan perikanan berdasarkan prinsip tata laksana pemanfaatan secara berkelanjutan sesuai peraturan dan keputusan teknis. Terbatasnya pemahaman tentang dampak praktek perikanan tidak berkelanjutan, baik pada tingkat pelaku dan pembuat kebijakan merupakan permasalahan yang harus segera dipecahkan. Kajian ini menyimpulkan bahwa sistem yang berjalan hanya mampu merekam data kurang dari sepertiganya dan penerapan perikanan secara bertanggung jawab pada perikanan cantrang memberikan indikasi pada tingkat yang mengkhawatirkan terutama berdasarkan pertimbangan biologi, eksploitasi dan kelestarian lingkungan, serta memiliki potensi terjadinya unreported yang mengarah pada praktek IUU fishing. Temuan ini diharapkan dapat memperkuat tersedianya landasan pengelolaan perikanan terkait pemulihan sumberdaya ikan demersal bagi kepentingan pengembangan perikanan dalam jangka panjang di Laut Jawa.</p><p> </p><p>Study on demersal danish seine fishery operating in the Java Sea tend to be categorized as an open access fishery. The historical fleet development indicate no limited access to exploit demersal fish resources, which is in many cases the fishery are not well managed in a responsible manner. Study indicates that most of license to fish of demersal danish seine operate in areas outside 12 nm, somehow fleets operated in the area for small-scale fishers in the nearby coastal area beyond the origin of license authority. The objective is to describe the existing data collecting system. This corresponds to the limitation of capacity of the catch in one of fishing port. The data collecting system of local fisheries services has a limited capacity, particularly in monitoring, control and surveillance to implement best practices of fisheries management that declared through several technical reference points. Increasing awareness by complying with management measures of business sectors and policy makers must be immediately resolved. This study indicates current system covered less than a third of its landing data and it would affect the implementation of responsible fisheries based on bio-exploitation and environmental sustainability indicators on demersal fishery. It also has a potential on unreported that lead to IUU fishing practices. This should considered that bias of data could affect the accuracy of regular fish stock assessment. This finding should be treated to strengthen the long-term demersal danish seine fishery management plan as a baseline of sustainable demersal fish resources in the Java Sea.</p>

scholarly journals KEBIJAKAN DAN STRATEGI PENGELOLAAN PERIKANAN TANGKAP DI DANAU TOBA PASKA INTRODUKSI IKAN BILIH

2017 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Sonny Koeshendrajana
Keyword(s):  
Fishery Management ◽  
Positive Impact ◽  
Management Practice ◽  
Fishing Effort ◽  
Survey Method ◽  
Fish Stock ◽  
Fishing Gear ◽  
Management Options ◽  
Rapid Appraisal ◽  
Descriptive Method

Pengelolaan perikanan tangkap pada hakekatnya adalah pengendalian penangkapan (control of fishing) dan pengendalian upaya penangkapan (control of fishing effort) melalui sejumlah opsi pengelolaan yang diimplementasikan oleh pihak pengelola (management authority). Kajian kebijakan dan strategi pengelolaan perikanan tangkap di perairan Danau Toba pasca introduksi ikan bilih (Mystacoleucus padangensis Bleeker) dimaksudkan untuk memberikan panduan praktek pengelolaan yang mampu menjamin keberlanjutan perikanan ikan bilih di perairan Danau Toba. Metode survei penilaian cepat (rapid appraisal survey) dan review literatur digunakan dalam kajian ini; sedangkan metode analisis deskriptif tabulatif dan content analysis digunakan untuk membantu pengambilan kesimpulan. Hasil kajian menunjukkan bahwa ikan bilih yang ditebarkan ke Danau Toba 2.840 ekor dengan ukuran panjang berkisar antara4,1-5,7 cm dan bobot 0,9-1,5 g pada tahun 2003 telah mampu memberikan dampak positif secara ekonomi dan sosial bagi masyarakat sekitar Danau Toba. Penggunaan alat tangkap yang kurang ataupun tidak terkontrol telah memberikan indikasi penurunan jumlah dan kualitas stok ikan bilih; sehingga implementasi opsi pengelolaan yang meliputi pengembangan kawasan konservasi dan pengaturan serta pengendalian penggunaan alat tangkap bagan untuk menjamin keberlanjutan perikanan ikan bilih perlu segera diterapkan oleh pihak pengelola.Fishery management is essentially a control of fishing and fishing effort through various management options implemented by a management authority. Studies on policies and strategies for fishery management in the Lake Toba water body post introducing or stocking of bilih fish (Mystacoleucus padangensis Bleeker)aimed at providing a sort of guidelines for management practice in order to ensure sustainability of such the fishery. Rapid appraisal survey method and literature review were used in this study. Analysis of the study used a descriptive method compounded by cross tabulated data techniques and a content anaysis method. Results show that introducing of bilih fish in the Toba Lake amounted of 2,840 piece with body length of 4.1-5.7 cm and body weight of 0.9-1.5 g in 2003 has been able to provide a positive impact to social and economic aspects of the society surrounding the Lake Toba. However, the use of uncontrolled fishing and fishing effort was led to indication of decreasing quantitatively and qualitatively such of the fish stock; therefore, implementation of management options of developing a protected or conserved area and controlled the use of bagan fishing gear has to be imposed by management authority.

SHALLOW WATER HABITAT MAPPING AND REEF FISH STOCK ESTIMATION USING HIGH RESOLUTION SATELLITE DATA

2013 ◽  
Vol 5 (2) ◽  
Author(s):  
Vincentius P. Siregar ◽  
Sam Wouthuyzen ◽  
Andriani Sunuddin ◽  
Ari Anggoro ◽  
Ade Ayu Mustika
Keyword(s):  
High Resolution ◽  
Reef Fish ◽  
Satellite Imagery ◽  
Field Survey ◽  
Coral Cover ◽  
Fish Density ◽  
Fish Stock ◽  
Benthic Habitat ◽  
Live Coral ◽  
Stock Estimation

Shallow marine waters comprise diverse benthic types forming habitats for reef fish community, which important for the livelihood of coastal and small island inhabitants. Satellite imagery provide synoptic map of benthic habitat and further utilized to estimate reef fish stock. The objective of this research was to estimate reef fish stock in complex coral reef of Pulau Pari, by utilizing high resolution satellite imagery of the WorldView-2 in combination with field data such as visual census of reef fish. Field survey was conducted between May-August 2013 with 160 sampling points representing four sites (north, south, west, and east). The image was analy-zed and grouped into five classes of benthic habitats i.e., live coral (LC), dead coral (DC), sand (Sa), seagrass (Sg), and mix (Mx) (combination seagrass+coral and seagrass+sand). The overall accuracy of benthic habitat map was 78%. Field survey revealed that the highest live coral cover (58%) was found at the north site with fish density 3.69 and 1.50 ind/m2at 3 and 10 m depth, respectively. Meanwhile, the lowest live coral cover (18%) was found at the south site with fish density 2.79 and 2.18  ind/m2 at 3 and 10 m depth, respectively. Interpolation on fish density data in each habitat class resulted in standing stock reef fish estimation:  LC (5,340,698 ind), DC (56,254,356 ind), Sa (13,370,154 ind), Sg (1,776,195 ind) and Mx (14,557,680 ind). Keywords: mapping, satellite imagery, benthic habitat, reef fish, stock estimation

Long-term changes in fish pond management as ‘an unplanned ecosystem experiment’: importance of zooplankton structure, nutrients and light for species composition of cyanobacterial blooms

1995 ◽  
Vol 32 (4) ◽  
pp. 187-196 ◽  
Author(s):  
L. Pechar
Keyword(s):  
Species Composition ◽  
Fishery Management ◽  
Grazing Pressure ◽  
Organic Fertilizers ◽  
Cyanobacterial Blooms ◽  
Fish Stock ◽  
Fish Ponds ◽  
Single Filament ◽  
The 1950S ◽  
Water Blooms

The study presents data on the species composition of cyanobacterial water blooms in Czech fish ponds from the 1950s to the 1990s. Since the 1950s, a shift from large-colonial Aphanizomenon flos-aquae var. flos-aquae through Microcystis aeruginosa and small-colonial species of Anabaena to single-filament species (Planktohrix agardhii, Limnothrix redekei, Aphanizomenon gracile) or single-cell forms (Microcystis ichtyoblabe), has been observed. The changes in the species composition of the water blooms are closely related to changes in fishery management (increase in fish stock, increase in application of organic fertilizers). At present the high predation of fish upon zooplankton results in elimination of large colonial blooms of A. flos-aquae associated with large filtering zooplankton (Daphnia). Low grazing pressure of zooplankton, low light conditions and low N:P ratios are suitable conditions for mass development of the small species of cyanobacteria. High pH is not necessary to achieve cyanobacteria dominance.

A Synthesis of Knowns, Unknowns, and Policy Recommendations from the Sea Lamprey International Symposium

1980 ◽  
Vol 37 (11) ◽  
pp. 2202-2208 ◽  
Author(s):  
Carl J. Walters ◽  
George Spangler ◽  
W. J. Christie ◽  
Patrick J. Manion ◽  
James F. Kitchell
Keyword(s):  
International Symposium ◽  
Large Scale ◽  
Fishery Management ◽  
Field Experiments ◽  
Lake Trout ◽  
Sea Lamprey ◽  
Future Research ◽  
Fish Stock ◽  
Total Production ◽  
Pilot Studies

The Sea Lamprey International Symposium (SLIS) has provided a broad spectrum of facts and speculations for consideration in future research and management programs. Many aspects of the laboratory biology and field life history of the sea lamprey (Petromyzon marinus) are now well understood. There is little question that it can now be controlled by chemical larvicides, and perhaps in the future by more efficient integrated control programs. There is correlative evidence (wounds, scars, catch curves) that lamprey caused major mortalities in some fish species, and that control in conjunction with stocking has lead to remarkable recoveries of salmonid stocks in the Great Lakes. However, there are great gaps in understanding about just what the lamprey does under field conditions, and it is not yet possible to reject several hypotheses that assign lamprey a minimum or transient role in fish stock changes. Further studies on details of lamprey biology are, in themselves, unlikely to fill the gaps; one alternative is to conduct a large-scale field experiment involving cessation of lamprey control while holding other factors (fishing, stocking) as steady as possible. If it is decided to proceed with management on the assumption that lamprey are important, without the major field experiments to confirm it, then at least the following steps should be taken: (1) the chemical treatment program should be reviewed in detail, with a view to finding treatment schedules that will minimize frequency and dose rates for lampricide applications; (2) pilot studies on alternative control schemes (sterile male, attractants, barriers) should only be funded if they are statistically well designed (several replicate and control streams), and involve quantitative monitoring of lamprey spawning success and subsequent total production of transforming larvae; (3) the lake trout (Salvelinus namaycush) stocking program should be maintained at its present level, and should involve diverse genotypes rather than a few hatchery strains; (4) growth in the sport fisheries for lake trout should be curtailed, and commercial fisheries should not yet be permitted; (5) a multispecies harvesting policy should be designed that takes into account the buffering effect of each species on lamprey mortality suffered by others (i.e. should some species not be harvested at all, and viewed instead as buffers for more valuable species?); and (6) a program should be developed for restoring, by culture if necessary, native forage species in case the introduced smelt and alewife should collapse under pressure from fishing and prédation by the growing salmonid community.Key words: sea lamprey, proposed research, fishery management, mathematical models, population dynamics

scholarly journals KEANEKARAGAMAN JENIS JAMUR MAKROSKOPIS PADA BERBAGAI KONDISI TEMPAT TUMBUH HUTAN RAWA GAMBUT DI KAWASAN HUTAN DENGAN TUJUAN KHUSUS UNIVERSITAS TANJUNGPURA

2019 ◽  
Vol 7 (3) ◽  
Author(s):  
Syapriadi Utama ◽  
Dwi Astiani ◽  
Wiwik Ekyastuti
Keyword(s):  
Canopy Cover ◽  
Sampling Technique ◽  
Forest Products ◽  
Data Retrieval ◽  
Survey Method ◽  
Swamp Forest ◽  
Peat Swamp Forest ◽  
Plot Sampling ◽  
Peat Swamp ◽  
Open Canopy

Tanjungpura University Forest for Special Purpose located in three districts Landak Regency, Mempawah Regency and Kubu Raya Regency. Has the potential to use and process non-timber forest products. The diversity of macroscopic fungi is not yet known as one of the potential natural biological resources of significant value. So that a mushroom inventory must be carried out to identify and assess the diversity of macroscopic fungi. The method used is the survey method. Data retrieval uses a double plot sampling technique. The size of each observation plot is 5 m × 5 m as the initial reference, four plots in the peat swamp forest area with open canopy cover conditions and also four observation plots in peat swamp forest areas with canopy cover conditions are still closed. Placement of research plots in both areas was carried out purposively in locations where there were many types of macroscopic fungi. The results showed that the types of macroscopic fungi found at the study site were 24 species. 24 species were divided into 594 individuals belonging to 23 genera and 9 families. Macroscopic fungi found in open canopy cover were found in 17 species, while in closed canopy cover there were 13 species. In both types of conditions the place to grow has the same 6 types of fungi. The degree of diversity of macroscopic fungi in various conditions the peat swamp in Tanjungpura University Forest for Special Purpose is low.Keyword: Macroscopic fungi, peat swamp forest, Tanjungpura University Forest for Special Purpose.

scholarly journals HUBUNGAN KEPADATAN IKAN DENGAN KONDISI LINGKUNGAN PERAIRAN ESTUARI DI KABUPATEN BANYUASIN

2017 ◽  
Vol 23 (2) ◽  
pp. 111
Author(s):  
Aroef Hukmanan Rais ◽  
Rupawan Rupawan ◽  
Herlan Herlan
Keyword(s):  
Water Temperature ◽  
Significant Contribution ◽  
Aurelia Aurita ◽  
Total Biomass ◽  
Biomass Distribution ◽  
Phytoplankton Abundance ◽  
Biomass Density ◽  
Fish Resources ◽  
Salinity Water ◽  
Distribution Of Fish

Estuari di wilayah Kabupaten Banyuasin dengan potensi biodiversitas sumber daya ikan yang tinggi, merupakan wilayah penangkapan yang potensial dan berkontribusi besar terhadap poduksi perikanan Provinsi Sumatera Selatan. Distribusi biomassa sumber daya ikan di wilayah estuari sangat dinamis dan dipengaruhi oleh parameter salinitas dan suhu perairan pada suatu lingkungan perairan. Penelitian ini bertujuan untuk mengetahui kondisi kepadatan biomassa ikan dalam hubungannya dengan kondisi lingkungan perairan di wilayah perairan estuari Kabupaten Banyuasin.Pengambilan sampel ikan dilakukan dengan percobaan penangkapan menggunakan alat tangkap trawl mini yang diopeasikan di tiga wilayah estuari yaitu Sungai Banyuasin, Sungai Musi dan Sungai Upang. Pada masing-masing wilayah estuari ditentukan sebanyak empat lokasi sampling. Frekuensi pengambilan sampel dilakukan sebanyak empat kali yaitu pada Maret, Juni, Agustus dan Oktober agar mewakili kondisi musiman.Parameter lingkungan yang dianalisa adalah salinitas, suhu perairan, kecerahan, nitrat, amoniak, total fosfat dan kelimpahan fitoplankton. Hasil penelitian menunjukkan sebanyak 87 spesies ikan telah teridentifikasi. Diperoleh nilai kepadatan biomassa 332,13 – 861,49 kg/km2 di estuari Upang, 590,51 – 2.235,04 kg/km2 di estuari Musi dan 1.296,4 - 33.714,88 kg/km2 di estuari Banyuasin. Spesies ubur-ubur (Aurelia aurita) mendominasi tangkapan pada Agustus hingga Oktober yang mencapai 77,22% dari biomassa total ikan dikarenakan lingkungan yang sesuai untuk keperluan pertumbuhannya. Kepadatan biomassa ikan berkorelasi positif dengan parameter salinitas dan kelimpahan fitoplankton, dan berkorelasi negatif terhadap parameter amoniak. Estuaries of Banyuasin district has a high biodiversity of fish resources and significant contribution to the fisheries production in the South Sumatera Province. The biomass distribution of fish in the estuary fluctuated and probably affected by by salinity and water temperature. This research aims to investigate the correlation between biomass density and environment condition in the estuary of Banyuasin Regency. Sampling was conducted through experimental fishing used a mini trawl that operated in three estuary areas, such as: Banyuasin Rivers, Musi Rivers, and Upang Rivers. Every estuary area was replicated for four sampling sites. Samples were collected during March, June, August and October. The waters parameters analyzed were salinity, water temperature, transparency, nitrate, ammonia, phosphate total, and phytoplankton. The results showed that about 87 species of fish have been identified. The biomass density was 332,13 – 861,49 kg/km2 in estuary Upang, 590,51 – 2.235,04 kg/km2 in estuary Musi and 1.296,4 - 33.714,88 kg/km2 in estuari Banyuasin. A jelly fish (Aurelia aurita) is dominated in August to October, up to 77.22% of total biomass. The biomass density of fish was positively correlated with salinity and phytoplankton abundance, whereas negatively correlated to ammoniac condition.

scholarly journals The role of fishery supervisors and community participation to ensure the sustainable fisheries in Indonesia’s Exclusive Economic Zone

2021 ◽  
Vol 890 (1) ◽  
pp. 012068
Author(s):  
Maskun ◽  
H Assidiq ◽  
S N Bachril ◽  
N Al-Mukarramah
Keyword(s):  
Community Participation ◽  
Fishery Management ◽  
Exclusive Economic Zone ◽  
Law Of The Sea ◽  
Fish Resources ◽  
Effective Manner ◽  
Economic Zone ◽  
The Law ◽  
The Right

Abstract Indonesia has ratified the United Convention Law of the Sea of 1982 with the Law No. 17 of 1985 concerning the Ratification of United Nations Convention on The Law of the Sea 1982. It means that Indonesia has the right to use, conserve, and manage fish resources in the Indonesia’s Exclusive Economic Zone (IEEZ). To guarantee the optimal and sustainable management of Indonesian fish resources, the role of fishery supervisors and community participation in an efficient and effective manner is needed. Law enforcement in the field of fisheries is very important and strategic to support fishery development in accordance with the principle of fishery management, so that the sustainable development of fisheries can be done continuously. Therefore, the existence of legal certainty is absolutely necessary to support fishery management in Indonesia.

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