scholarly journals Sustainable Management of Blue Swimming Crab (Portunus pelagicus) Based of Bioecology Aspects In Lasongko Bay, Southeast Sulawesi

2017 ◽  
Vol 9 (1) ◽  
pp. 41 ◽  
Author(s):  
Abdul Hamid Lakudo ◽  
Yusli Wardiatno Wardiatno ◽  
Djamar T.F Lumban Batu ◽  
Etty Riani Riani
Keyword(s):  
Strategic Management ◽  
Sustainable Management ◽  
Ovigerous Female ◽  
Management Strategies ◽  
Research Result ◽  
Fishing Ground ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Sustainability Management ◽  
The Status

Status perikanan rajungan di Teluk Lasongko saat ini telah overfishing dan kritis, sehingga perlu dikelola dengan baik. Makalah ini bertujuan untuk menentukan potensi dan permasalahan keberlanjutan pemanfaatan rajungan serta menyusun strategi pengelolaan rajungan di Teluk Lasongko berdasarkan pada aspek bioekologi. Data ekobiologi dikumpulkan sejak tahun 2006, dan 2013 sampai 2014 di Teluk Lasongko. Hasil penelitian menunjukkan potensi dan keberlanjutan pemanfaatan perikanan rajungan di Teluk Lasongko tergolong tinggi. Permasalahan yang timbul yang mengancam keberlanjutan rajungan adalah overfishing, penangkapan rajungan berukuran kecil dan rajungan betina ovigerous, daerah penangkapan rajungan yang tidak merata, dan kegiatan perikanan yang tidak ramah lingkungan. Beberapa strategi pengelolaan harus dilakukan untuk mendukung dan memastikan pengelolaan berkelanjutan rajungan di Teluk Lasongko, yaitu penetapan ukuran terkecil yang boleh ditangkap (untuk jantan >109,8 mm-CW dan betina >115,7 mm-CW), pelarangan penangkapan rajungan betina ovigerous, dan mengurangi upaya penangkapan dengan bubu sampai 50%. Selain itu, restocking dan pembentukan suaka rajungan juga harus dilakukan.  The status of blue swimming crab (Portunus pelagicus) fishery in Lasongko Bay is detected overfishing and critical, so it needs to be managed properly. This paper was aimed to determine the potential and problems of sustainability use of the crab and establish strategic management based on bioecology aspects. Bioecological data on the crab were collected in 2006, and from 2013 to 2014 in Lasongko Bay. Research result of indicated high potential and sustainable of use of crab fishery in the bay. Arising problems to threat the sustainability were over-fishing, small size crab and ovigerous female catch, localized fishing ground, and unfriendly environmentally fishing activities. Some management strategies must be done to support and ensure the sustainability management of the crab in Lasongko Bay, i.e. the minimum legal size (for males >109.8 mm-CW and females >115.7 mm-CW), not catching ovigerous female crabs, and reducing use of traps up to 50%. Restocking and establishing crab sanctuary could be also important to enhance the aforesaid management strategies.

scholarly journals Stock Status of Blue Swimming Crab (Portunus pelagicus Linnaeus, 1758) in Tiworo Strait Waters, Southeast Sulawesi, Indonesia

2020 ◽  
Vol 25 (2) ◽  
pp. 85-90
Author(s):  
Yustika Permatahati Intan Permatahati ◽  
Nila Nikmatia Bugis ◽  
La Sara ◽  
Tezza Fauzan Hasuba Hasuba
Keyword(s):  
Carapace Width ◽  
Growth Patterns ◽  
Fishing Ground ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Male And Female ◽  
Gonad Maturity ◽  
Stock Status ◽  
Spawning Potential Ratio ◽  
Very High

The blue swimming crab (BSC) fishery in Tiworo Strait has been heavily exploited since two decades ago when its worldwide demand and price was very high. Study on population aspects of this organism in this waters is limited. The aim of present study was to investigate growth patterns, population stock status, and size at first gonad maturity of Portunus pelagicus. One of the main fishing ground of BSC around Tiworo Strait waters is at Bangko and Gala Islands. Samples of BSC were taken monthly using gillnet and collapsible trap. Each sample taken was identified its sex, measured its carapace width, and weighed. Data collected from fishing ground of BSC were analyzed to find out growth patterns, population stock status using spawning potential ratio (SPR) method, and the first gonad maturity (CW50). The results of study showed that growth patterns of BSC male and female following isometric growth patterns (b=0) (P<0.05). It was found out that SPR of BSC from both fishing ground was 22.46% and 23.71%, respectively which indicates that population stock status of BSC in Tiworo strait waters is “moderate level” (SPR > 20%). The size at first gonad maturity (CW50) was attained at carapace width of 9.16 cm for male and 10.16 cm for female. Those imply that BSCs allowed to be caught should be >10 cm. 

scholarly journals VARIABILITY OF CARAPACE WIDTH SIZE AND ABUNDANCE OF BLUE SWIMMING CRABS (Portunus pelagicus Linnaeus) IN PATI WATERS

2016 ◽  
Vol 7 (2) ◽  
Author(s):  
Dyah Ika Nugraheni ◽  
Achmad Fahrudin ◽  
. Yonvitner
Keyword(s):  
Coastal Waters ◽  
Accretion Rate ◽  
Carapace Width ◽  
Management Strategies ◽  
Fishing Effort ◽  
Swimming Crab ◽  
Nearshore Zone ◽  
Portunus Pelagicus ◽  
Males And Females ◽  
Swimming Crabs

<p><em>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 &lt;0.05), as well as between males and females. Average number of individual (abundance) was significantly different according to fishing areas and sex (p &lt;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.</em></p><p><em><strong><em>Keywords:  </em></strong><em>blue swimming crab, carapace widht (CW), abundance, intensity of fishing</em></em></p>

scholarly journals STATUS KEBERLANJUTANPENGELOLAAN TERUMBU KARANG DI PULAU HOGOW DAN PUTUS-PUTUS SULAWESI UTARA

2011 ◽  
Vol 7 (3) ◽  
pp. 115
Author(s):  
Unstain NWJ Rembet ◽  
Mennofatria Boer ◽  
Dietriech G Bengen ◽  
Achmad Fahrudin
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Sustainable Management ◽  
Coral Cover ◽  
Social Dimension ◽  
Sustainability Management ◽  
North Sulawesi ◽  
The Status ◽  
Coral Reef Ecosystems ◽  
Institutional Dimension

ABSTRACTA study aimed to examine the status of sustainable management of coral reef in Pulau Hogow and Pulau Putus-Putus in Southeast Minahasa regency, North Sulawesi Province, was conducted in from July to September 2011. Diagnosis on the status of sustainable management of coral reef was presented in a sequence covering the ecological, economic, social, institutional and technological dimensions. In ecological dimension, the attribute of percentage of coral cover provided the largest contribution. In economical dimension, the largest contribution was provided by tourism guide, time used for coral reefs exploitation, dependency on the resource as a source of income and foreign tourists attributes. In social dimension, similar indications shown by the attributes of the number of locations which were potential for exploitation conflicts, level of education and efforts to repair the damage of coral reef ecosystems. On the institutional dimension, the contributions made by all attributes were almost even, with the highest is the tradition/culture and cooperation attributes. Similarly, in the technological dimension the contributions made attributes were almost even, with the highest contributions were from boat technology and technology post-harvest technology attributes. For overall dimensions of sustainability management of coral reefs, a map created in RAPFISH ordinate showed recommendation on the status of the sustainability.Keywords: sustainability, management, coral reef, dimension.ABSTRAKPenelitian ini bertujuan untuk menelaah status keberlanjutan pengelolaan te-rumbu karang di Pulau Hogow dan Putus-Putus Kabupaten Minahasa Tenggara Provinsi Sulawesi Utara, dilakukan pada bulan Juli-September 2011. Diagnosis status keberlanjutan pengelolaan terumbu karang dikemukakan secara berurutan mencakup dimensi ekologi, dimensi ekonomi, dimensi sosial, dimensi kelembagaan dan dimensi teknologi. Dalam dimensi ekologi atribut persentase penutupan karang memberikan kontribusi terbesar. Untuk dimensi ekonomi kontribusi terbesar diberikan atribut pe-mandu wisata, waktu yang digunakan untuk pemanfaatan terumbu karang, ketergan-tungan kepada sumberdaya sebagai sumber nafkah dan wisatawan mancanegara. Di-mensi sosial indikasi serupa ditunjukkan oleh atribut-atribut jumlah lokasi potensi kon-flik pemanfaatan, tingkat pendidikan dan upaya perbaikan kerusakan ekosistem terum-bu karang. Pada dimensi kelembagaan kontribusi yang diberikan atribut-atribut merata, tetapi yang tertinggi adalah tradisi/budaya dan koperasi. Demikian juga pada dimensi teknologi, kontribusi yang diberikan atribut-atribut merata, dengan kontribusi tertinggi adalah atribut teknologi perahu dan teknologi pasca panen. Untuk semua dimensi keberlanjutan pengelolaan terumbu karang, hasil pemetaan yang dilakukan dalam ordinasi RAPFISH menunjukkan status keberlanjutan yang baik untuk dilakukan.Kata kunci: keberlanjutan, pengelolaan, terumbu karang, dimensi.

scholarly journals KESESUAIAN DAERAH PENANGKAPAN RAJUNGAN (Portunus pelagicus) MENGGUNAKAN ANALISIS SPASIAL PARAMETER LINGKUNGAN DAN HASIL TANGKAPAN DI PULAU LANCANG

2019 ◽  
Vol 10 (2) ◽  
pp. 165-176
Author(s):  
Insaniah Rahimah ◽  
Vincentius Siregar ◽  
Syamsul Agus
Keyword(s):  
Sex Ratio ◽  
Geospatial Analysis ◽  
Fishing Ground ◽  
Physical Parameters ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Species Preservation ◽  
Phosphate Nitrate ◽  
Substrate Types ◽  
Swimming Crabs

The blue swimming crab in the waters of Lancang Island is indicated as being overfished. Hence, the major challenge is managing its utilization in a proper manner. The purpose of this study is to explore the water's characteristics which is suitable for blue swimming crab fishing. Accordingly, the potential fishing ground around Lancang Island waters can be mapped spatially as an initial effort for species preservation. Geospatial analysis was applied to assess the physical parameters of the existing habitat. The results show that parameters such as MPT, TDS, brightness, phosphate, nitrate, depth and substrate types were remarkably suitable to support the growth of blue swimming crabs. Meanwhile, parameters such as salinity, DO, and temperature show lower quality which implied that the habitat is less suitable. However, the result of weighting and reclassification conclude that Lancang island waters is a decent habitat for blue swimming crab. Catch data show that 40% blue swimming crabs have small carapace size (7-11.83 cm) which is undersized and prohibited by law. Furthermore, about 68% of catch are quite light (30-147 gr) and the sex ratio of males to females was 1:2. It was also revealed that approximately 35% of female species were carrying eggs (BEF/barried female). Keywords: geospatial, fishing ground, suitability, Lancang Island, blue swimming crab.

scholarly journals Identifying blue swimming crab (Portunus pelagicus) stocks with truss network analysis approach in Indonesian Fisheries Management Area 712

2020 ◽  
Vol 10 (3) ◽  
pp. 390-401
Author(s):  
Nurhaya Afifah ◽  
Zairion Zairion ◽  
Hawis H Maduppa ◽  
Agus A Hakim ◽  
Yusli Wardiatno
Keyword(s):  
Network Analysis ◽  
Fisheries Management ◽  
Sustainable Management ◽  
Euclidean Distance ◽  
The Other ◽  
Optimum Level ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Morphometric Characters ◽  
Management Area

Exploitation rate of the blue swimming crab (BSC) in Indonesian Fisheries Management Area (FMA) 712 is over-optimum level in 2016. Stocks concern in sustainable management is needed as an effort to maintain its availability. The objective of this study is to identify the stock unit of BSC based on Truss Network Analysis (TNA) of morphometric characters in FMA 712. The BSC was collect in five different locations, i.e. East Lampung, Lancang Island, Cirebon, Rembang, and Southern Madura. Measurements on TNA were carried out at 14 landmark points with 29 characters in carapace to analyze its morphometric characters. The cluster analysis showed that TNA method revealed two stocks units of BSC in FMA 712. The first stock was the BSC population of Southern Madura, and the other stock was the other four population. The longest Euclidean distance was found at Southern Madura indicating similarity level with other populations was low. The discriminant analysis demonstrated the different result. There were three group populations, which every population in one group were able to represent the other population, namely Lancang Island-Cirebon, East Lampung-Rembang, and Southern Madura. Regarding to this study, it is recommended to manage BSC in Southern Madura separately.

scholarly journals PENENTUAN STATUS STOK SUMBERDAYA RAJUNGAN (Portunus pelagicus Linnaeus, 1758) DENGAN METODE SPAWNING POTENTIAL RATIO DI PERAIRAN SEKITAR BELITUNG

2015 ◽  
Vol 21 (2) ◽  
pp. 63
Author(s):  
Tri Ernawati ◽  
Duranta D Kembaren ◽  
Karsono Wagiyo
Keyword(s):  
Carapace Width ◽  
Population Decline ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Average Value ◽  
Stock Status ◽  
The Status ◽  
Spawning Potential Ratio ◽  
Individual Size ◽  
Stock Recovery

<em><em></em></em><p>Sumber daya rajungan (Portunus pelagicus Linnaeus, 1758) di perairan sekitar Belitung dieksploitasi terus menerus dilakukan sebagai sumber mata pencaharian. Pemanfaatan intensif sumber daya rajungan dapat menurunkan ketersediaan stok rajungan di perairan. Indikasi tangkap berlebih (overfishing) terhadap pemanfaatan sumber daya rajungan sudah mulai terlihat dari penurunan hasil tangkapan dan ukuran individu. Tulisan ini bertujuan mengetahui kondisi dan status stok sumber daya rajungan berdasarkan pada hasil penelitian yang dilakukan dari Februari sampai dengan November 2014 di perairan sekitar Pulau Belitung. Metode yang digunakan untuk penentuan status stok rajungan dengan menggunakan pendekatan metode Spawning Potential Ratio (SPR). Hasil penelitian menunjukkan bahwa status stok sumber daya rajungan di perairan sekitar Belitung mengalami penurunan yang ditunjukkan dengan hasil SPR 5% atau telah mengalami heavily exploited. Indikasi penurunan populasi juga ditunjukkan dengan nilai ratarata ukuran lebar karapas (CW) rajungan yang tertangkap (CW50) sebesar 93 mm, dibawah ukuran lebar karapas rata-rata pertama kali matang gonad (CWm) sebesar 118,9 mm. Upaya pemulihan stok dapat dilakukan dengan cara meningkatkan SPR pada level 10% dan 20% sebagai batas dan target pengelolaan untuk keberlanjutan sumber daya rajungan atau pada rata-rata ukuran lebar karapas (CW) rajungan yang tertangkap adalah 12 cm.</p><p><br /><em>The blue swimming crab (BSC) resources in waters around Belitung waters continously exploited as a livelihood resource. Intensive utilization of BSC resources can reduce the availability of stock in the waters. Indication of overfishing to the BSC resource have been seen by declining in catches </em><em>and individual size of BSC. The research aims to determine the condition and stock status of BSC resource based on the results of research conducted from February to November 2014 in the waters around the island of Belitung. The method used for determining the status of BSC stocks by using a method Spawning Potential Ratio (SPR). The result showed that stock status of BSC in the waters around Belitung decreased as indicated by the results of SPR 5% or has suffered heavily exploited. The indication of population decline is also indicated by the average value of the size of the carapace width (CW) at capture (L50) as 93 mm, it is below the average carapace width at first </em><em>maturity (Lm) as 118.98 mm. Stock recovery can be done by SPR at level 10% and 20% as biological sutainaibility as limist and target for management. It could reached if the minimal average value of the size of the carapace width of capture is 12 cm.</em></p>

scholarly journals VARIABILITY OF CARAPACE WIDTH SIZE AND ABUNDANCE OF BLUE SWIMMING CRABS (Portunus pelagicus Linnaeus) IN PATI WATERS

2016 ◽  
Vol 7 (2) ◽  
Author(s):  
Dyah Ika Nugraheni ◽  
Achmad Fahrudin ◽  
. Yonvitner
Keyword(s):  
Coastal Waters ◽  
Accretion Rate ◽  
Carapace Width ◽  
Management Strategies ◽  
Fishing Effort ◽  
Swimming Crab ◽  
Nearshore Zone ◽  
Portunus Pelagicus ◽  
Males And Females ◽  
Swimming Crabs

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

scholarly journals Status Of Endemic Plants Of Bangladesh And Conservation Management Strategies

2013 ◽  
Vol 2 (1) ◽  
pp. 231-249
Author(s):  
M Atiqur Rahman ◽  
M Enamur Rashid
Keyword(s):  
Sustainable Management ◽  
Conservation Management ◽  
Conservation Status ◽  
Management Strategies ◽  
Species Conservation ◽  
Endemic Plants ◽  
Conservation Priority ◽  
The Status ◽  
In The Wild ◽  
Total Species

The present study was aimed at recognizing the status of 28 endemic plants of Bangladesh and determining their conservation management strategies. These endemics belong to 17 angiosperm families and constitute about 0.78% of the total species of the country. Of these endemics, 2 species were least concern, 10 rare and 7 endangered, and need to give immediate conservation priority. Another 9 endemics were assessed to be extinct since no report of collection for more than 100 years was available and could not be traced in the wild. An enumeration of these endemics is presented, each cited with updated nomenclature, bangla names, type, habit, ecology, potential values, places and status of occurrence, threats to the species, conservation status for sustainable management strategies. List of examined specimens of these endemics, wherever available, is also provided. Photographs of 24 endemics are also presented. International Journal of Environment, Volume-2, Issue-1, Sep-Nov 2013, Pages 231-249 DOI: http://dx.doi.org/10.3126/ije.v2i1.9224

scholarly journals META ANALISIS PENGARUH TEKANAN PENANGKAPAN TERHADAP UKURAN RAJUNGAN (Portunus pelagicus) DI TELUK BANTEN

2019 ◽  
Vol 10 (2) ◽  
pp. 153-163
Author(s):  
Adi Susanto ◽  
Ririn Irnawati ◽  
Mustahal ◽  
Hery Sutrawan Nurdin ◽  
Yeni Marliana ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Carapace Width ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Analysis Techniques ◽  
Standard Mean Difference ◽  
The Status ◽  
Obser Vations ◽  
Swimming Crabs

Blue swimming crab (Portunus pelagicus) is an important economical fishery commodity for fishermen in Banten Bay that are caught using gill nets and collapsible traps. The increasing of fishing pressure has highly potential to reduce the quality of the catch as exposed in previous studies. However, the comprehensive, and time series analysis of the previous research results have not been conducted. The purpose of this study is to analyze the variations of blue swimming crab caught in Banten Bay through a combination of meta-analysis techniques, fishing trials and field obser-vations to determine the effect of fishing activities on swimming crab sizes, and evaluate the status of swimming crab fisheries in Banten Bay. Standard mean difference from 10 different studies was used as a meta-analysis parameter. The results of the meta-analysis showed that fishing activities were conducted from 2004 to 2018 had a significant effect on the decreasing of the swimming crab size. The average of swimming crab carapace width caught in 2019 approximately 121.66 mm. The proportion of legal swimming crabs in 2014, 2015 and 2019 was more than 80%, so that the status of swimming crab fisheries in Banten Bay is still environmentally friendly.Keywords: carapace width, meta analysis, fisheries, Portunus pelagicus, blue swimming crab

scholarly journals POLA MUSIM DAN DAERAH PENANGKAPAN RAJUNGAN (Portunus pelagicus) DI PERAIRAN KABUPATEN PANGKEP (Season And Patterns of Catching Swimming Crab (Portunus pelagicus) in Pangkep Waters Regency)

2016 ◽  
Vol 5 (2) ◽  
pp. 193
Author(s):  
. Ihsan ◽  
Eko Sri Wiyono ◽  
Sugeng Hari Wisudo ◽  
John Haluan
Keyword(s):  
Time Series ◽  
Secondary Data ◽  
Fishing Effort ◽  
Fishing Ground ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Fishing Area ◽  
Individual Crab ◽  
Swimming Crabs ◽  
Participatory Method

<p>ABSTRACT<br />The season patern of swimming crab is influenced by rekruitman amount generated by each individual crab in the fishing ground. This study aims to assess the pattern of fishing crab season and the fishing ground as a participatory method in Pangkep water Regency. The data collected consisted of primary and secondary data. Data analysis was performed using the technique of time series analysis on the catch per unit of fishing effort crab monthly during the last six years. The peak season is catching crabs at IMP&gt; 1% which took place in June and September. The highest percentage of catches in the fishing ground is in September which is 11.71% and lowest in April which amounted to 5.77%. The results of the analysis of index fishing season of crabs is throughout the year at the fishing area in Pangkep waters.</p><p>Keywords: Analysis, Season Patern, Fishing Ground, Swimming Crabs</p><p>-------</p><p><br />ABSTRAK</p><p>Pola musim rajungan dipengaruhi oleh jumlah rekruitman yang dihasilkan oleh setiap individu rajungan di daerah penangkapan. Penelitian ini bertujuan untuk mengkaji pola musim penangkapan rajungan dan daerah penangkapan rajungan secara partisipatif di perairan Kabupaten Pangkep. Data yang dikumpulkan terdiri dari data primer dan data sekunder. Analisis data yang dilakukan adalah menggunakan teknik analisis deret waktu (time series) terhadap hasil tangkapan per satuan upaya penangkapan bulanan rajungan selama enam tahun terakhir. Musim puncak penangkapan rajungan berada pada IMP &gt; 1 % yakni berlangsung pada bulan Juni dan September. Persentase tangkapan tertinggi di daerah penangkapan adalah pada bulan September yakni 11,71 % dan terendah pada bulan April yakni sebesar 5,77 %. Hasil analisis indeks musim penangkapan (IMP) rajungan dilakukan sepanjang tahun di daerah penangkapan di perairan Kabupaten Pangkep.</p><p><br />Kata kunci: Analisis; Pola Musim; Daerah Penangkapan; Rajungan</p>

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