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 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 Growing Pattern of Blue Swimming Crab, Portunus pelagicus at Two Different Locations in Manado Bay

2018 ◽  
Vol 6 (1) ◽  
pp. 149
Author(s):  
Frank Rijkaard Makahinda ◽  
Rose O.S.E Mantiri ◽  
Boyke H. Toloh
Keyword(s):  
Growth Pattern ◽  
Carapace Width ◽  
Market Demand ◽  
Swimming Crab ◽  
Chi Square ◽  
Portunus Pelagicus ◽  
Relationship Analysis ◽  
Weight Relationship ◽  
Relationship Of ◽  
Swimming Crabs

Portunus pelagicus (blue swimming crab) is one of the important economical marine commodities produced from Indonesian coastal waters that has increasing market demand among fishery commodities. The purpose of this research is to reveal the relationship of carapace width and weight, the growth pattern and the carapace width-weight ratio of P. pelagicus crabs at two different research sites in Manado Bay. The benefits of this study, can be a reference for further studies on blue swimming crabs, P. pelagicus, and information obtained in this study could become important information needed for the maximum sustainable utilization of blue swimming crab, P. pelagicus.This research was conducted at two locations, namely Kelurahan Bahu, Sub-district of Malalayang with coordinates of 1 ° 27'49.86 "North and 124 ° 49'35.79" East and second location in Tumumpa Dua, Sub-district of Tuminting with coordinates 1 ° 31'14.51"North - 124 ° 50'28.67"East. Samples of blue swimming crabs were collected by deploying traps which are placed at 5-7 meters with the distance between traps 10 meter. Traps were placed at 17.00 pm and lifted on the next day at 06.00 am. Measurement of the width of the carapace conducted by using the ruler with 0.1 cm accuracy and weight measurement using the scales with 0.1 gram accuracy.The correlation value obtained for the wide and weight relationship of blue swimming crabs in the Sub-district of Malalayang is 0.953 for males and 0.898 for females. In Kelurahan Tumumpa Dua, Sub-dis ittrict of Tuminting 0.829 for males and 0.920 for females respectively. Based on these values the increase in the width of the carapace will affect the weight gain of the crab. The growth pattern of P. pelagicus crab in Kelurahan Bahu, Sub-district of Malalayang and Tumumpa Dua Sub-district Tuminting showed negative allometric growth pattern with b <3 value which means faster carapace growth compared to the weight of crab. From the result of chi square test on wide body and weight relationship analysis, is found same for both locations with value x2 table = 7.815 <x2 count = 112.3134. This is presumably due to one of the external factors is the availability of food.Keywords: Rajungan, growth pattern, Manado Bay AbstrakPortunus pelagicus merupakan salah satu komoditi hasil laut ekonomis penting yang dihasilkan dari perairan pantai Indonesia dengan permintaan pasar terhadap komoditas rajungan yang terus meningkat. Adapun tujuan penelitian ini yaitu mengetahui hubungan lebar berat rajungan P. pelagicus, pola pertumbuhan rajungan P. pelagicus dan perbandingan lebar berat rajungan P. pelagicus di dua lokasi penelitian yang berbeda di Teluk Manado. Manfaat penelitian ini, dapat menjadi bahan acuan untuk studi lebih lanjut mengenai rajungan P. pelagicus serta infomasi yang didapat dalam penelitian ini bisa menjadi bahan kajian untuk pemanfaatan rajungan P. pelagicus secara maksimal serta berkelanjutan.Penelitian ini dilaksanakan pada dua lokasi yakni di Kelurahan Bahu Kecamatan Malalayang dengan koordinat 1°27'49.86"LU - 124°49'35.79"BT dan lokasi kedua di Kelurahan Tumumpa Dua Kecamatan Tuminting dengan koordinat 1°31'14.51"LU - 124°50'28.67"BT. Pengambilan sampel dilakukan dengan alat tangkap bubu yang diletakan pada kedalam 5-7 meter dengan jarak antara bubu 10 meter. Bubu diletakan pada pukul 17.00 wita dan diangkat pada esok harinya pukul 06.00 wita. Pengukuran lebar karapas menggunakan mistar dengan ketelitian 0,1 cm dan pengukuran berat tubuh menggunakan timbangan 0,1 gr.Nilai korelasi yang didapat untuk hubungan lebar berat rajungan P. pelagicus di Kelurahan Bahu Kecamatan Malalayang 0,953 untuk jantan dan 0,898 untuk betina. Di Kelurahan Tumumpa Dua Kecamatan Tuminting 0,829 untuk jantan dan 0,920 untuk betina. Berdasarkan nilai tersebut pertambahan lebar karapas akan berpengaruh pada kenaikan berat tubuh dari rajungan. Pola pertumbuhan rajungan P. pelagicus di Kelurahan Bahu Kecamatan Malalayang dan di Kelurahan Tumumpa Dua Kecamatan Tuminting menunjukan pola pertumbuhan yang bersifat allometrik negatif dengan nilai b < 3 yang berarti pertumbuhan karapas lebih cepat dibandingkan pertambahan berat rajungan. Dari hasil analisis chi square lebar berat tubuh, sama untuk kedua lokasi penelitian dengan nilai x2 tabel =  7,815 < x2 hitung = 112,3134. Hal ini diduga karena salah satu faktor eksternal yakni  ketersediaan makanan.Kata  kunci : Rajungan,  Pola pertumbuhan, Teluk Manado.

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 Morphometric Relationships in the Blue Swimming Crabs, (Portunus pelagicus) (Linnaeus, 1758) from the Palk Bay, Sri Lanka

2021 ◽  
pp. 29-38
Author(s):  
S. S. K. Haputhantri ◽  
S. J. W. W. M. M. P. Weerasekera ◽  
K. H. K. Bandaranayake
Keyword(s):  
Sri Lanka ◽  
Carapace Width ◽  
Swimming Crab ◽  
Allometric Growth ◽  
Movable Part ◽  
Portunus Pelagicus ◽  
Mouth Width ◽  
Biological Sampling ◽  
Palk Bay ◽  
Swimming Crabs

The blue swimming crab (Portunus pelagicus) has become the focus of an important export-oriented fishery in Sri Lanka for a decade. The Palk Bay in the Northern coastal waters of Sri Lanka is one of the best-known fishing grounds for blue swimming crabs in Sri Lanka. This study was undertaken with the aim of establishing some morphometric relationships for P. pelagicus in the Palk Bay. Biological sampling was conducted for five consecutive days per month from November 2014 - October 2015 in the Northern landing sites in the Jaffna District where the catch of Palk Bay blue swimming crab fishery was landed. P. pelagicus specimens were also randomly collected for laboratory analysis. The morphometric measurements of the specimens for the following parameters were undertaken: CW - carapace width with the spine, CWW - carapace width without spine, MW – mouth width, TL - total length, LCPL - left chelar propodus length, LMOV - left movable part Length, RMOV - right movable part length, LCPH - left chelar propodus height, RCPH - right chelar propodus height, ABW - abdominal width, ABL - abdominal length and BW - body weight. The least squared method was used to obtain the Length-Length (L-L) and Length-Weight (L-W) relationships. Of the 65 L-L relationships obtained for P. pelagicus from the study, 34 relationships were correlated (r2>0.5). The estimated relationships between BW and CW for males and females were BW=0.0001 CW 3.01 (r2 =0.84) and BW= 0.0001 CW 2.90 (r2 =0.86), respectively. Positive allometric growth was observed for male P. pelagicus, whereas a negative allometric growth was observed for female P. pelagicus. Most of the morphometric relationships of P. pelagicus obtained in this study were not isometric.

The study of Iranian children and adolescents’ physical activity: a systematic review and meta-analysis

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Adel Alizadeh ◽  
Reza Negarandeh ◽  
Fahimehe Bagheri Amiri ◽  
Zahra Yazdani
Keyword(s):  
Physical Activity ◽  
Children And Adolescents ◽  
Meta Analysis ◽  
World Health ◽  
Chi Square ◽  
The Status ◽  
Newcastle Ottawa Scale ◽  
Health Organization ◽  
Iranian Children

Abstract Objectives This systematic and meta-analysis review was conducted to determine the status of Iranian children and adolescents’ physical activity. Content All the related articles which were published in the major databases, including Pubmed, Scopus, Web of Science, Embase, Magiran, SID from the beginning of 2010 to the end of 2019, were reviewed by researchers. The Newcastle-Ottawa scale was also used to evaluate the quality of articles. Moreover, I 2 index and chi-square were used to assess the heterogeneity between the results. Summary 490 articles were found as a result of the search in the selected international and local databases, where finally, 10 articles were included into the meta-analysis after the elimination of the duplicated articles and applying inclusion and exclusion criteria. The results indicated that 29.5% of the girls were considered active according to WHO criteria (16.1–42.8: 95% CI) and also 20.5% of the boys (7.3–33.7: 95% CI). Outlook Overall, this study’s findings showed that a large percentage of Iranian children and adolescents do not achieve the level of physical activity recommended by the World Health Organization. This can lead to undesirable consequences for this group of population that is considered as the human capital of any country; consequently, it seems necessary to take basic measures at the micro and macro levels in order to reduce such problems in the society.

Biologi Rajungan Portunus pelagicus Linnaeus, 1758 (Crustacea: Portunidae) Ditinjau Dari Aspek Distribusi Ukuran Dan Parameter Pertumbuhan Di Perairan Rembang, Jawa Tengah

2019 ◽  
Vol 8 (4) ◽  
pp. 402-408
Author(s):  
Nathanael Ganang Anindityo Wibowo ◽  
Chrisna Adhi Suryono ◽  
Ibnu Pratikto
Keyword(s):  
Size Structure ◽  
Carapace Width ◽  
Growth Parameter ◽  
Survey Method ◽  
Average Weight ◽  
Swimming Crab ◽  
Female Crab ◽  
Potential Yield ◽  
Portunus Pelagicus ◽  
Male Crab

Rembang merupakan salah satu kabupaten di Jawa Tengah yang dikenal sebagai daerah penghasil sumberdaya rajungan yang cukup tinggi permintaannya dan terus meningkat setiap tahunnya. Hal tersebut dapat menyebabkan terjadinya penurunan potensi hasil rajungan akibat intensifnya penangkapan di Perairan Rembang. Kajian tentang kondisi stok sumberdaya rajungan  terkait sebaran dan dinamika populasi ini sangat diperlukan dalam pengelolaan potensi rajungan. Tujuan dari penelitian ini adalah untuk menganalisis struktur ukuran dan parameter pertumbuhan rajungan di Perairan Rembang. Penelitian ini dilaksanakan pada bulan Maret – Juni 2019 di Perairan Rembang, dengan menggunakan metode survei yang bersifat deskriptif. Total sampel rajungan selama penelitian adalah 1200 ekor yang terdiri dari 574 ekor jantan dan 624 ekor betina. Hasil penelitian menunjukkan kelas ukuran lebar karapas rajungan didominasi oleh rajungan muda, dengan rata – rata 105.01 ± 11.99 mm untuk jantan dan 107.73 ± 10.68 untuk betina. Berat rata – rata rajungan jantan yaitu sebesar 95.2 ± 27.1 gram dan rajungan betina sebesar 97.9 ± 23.1 gram, sehingga menunjukkan rajungan jantan lebih kecil dibandingkan dengan rajungan betina. Pola pertumbuhan rajungan di Perairan Rembang bersifat allometrik negatif. Laju pertumbuhan rajungan di Perairan Rembang yang didapatkan adalah berupa nilai panjang asimptotik (L∞) sebesar 71.4 mm dengan koefisien pertumbuhan (K) sebesar 1.5/tahun.Rembang is a coastal region in Central Java which known as to producer of blue swimming crab resources that are in high demand and continues to increase every year. It will because decreasing the potential yield of blue swimming crab due to intensive fishing in Rembang Waters. Study on the stock condition of the blue swimming crab resource related to the distribution and dynamics of the population is required for the management of the blue swimming crab potential. The current research aims to assess the size structure and growth parameter of blue swimming crab in the Rembang Waters. The research was conducted from March to June 2019 in Rembang Waters, using a descriptive survey method. The total number of crab samples during the study was 1200 animals consisting of 574 male and 624 female. The results showed that the size of the crab carapace width class was dominated by young crabs, with an average of 105.01 ± 11.99 mm for males and 107.73 ± 10.68 for females. The average weight of male crab is 95.2 ± 27.1 gram and female crab is 97.9 ± 23.1 gram, indicates that male crab is smaller than female crab. The crab’s growth in Rembang Waters is allometric negative. The growth rate of crab in the Rembang Waters obtained is in the form of asymptotic length (L∞) was 71.4 mm with a growth coefficient (K) 1.5/year.

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 Studies on Biological Test of Formulated Diets Supplementation of Vitamin E for the Broodstock of Females Blue Swimming Crab, Portunus pelagicus (Linnaeus, 1758)

F1000Research ◽  
2018 ◽  
Vol 7 ◽  
pp. 1780 ◽  
Author(s):  
Efrizal Efrizal ◽  
Indra Junaidi Zakaria ◽  
Rusnam Rusnam ◽  
Suryati Suryati ◽  
Nofa Yolanda
Keyword(s):  
Vitamin E ◽  
Carapace Width ◽  
Coastal Region ◽  
Mass Scale ◽  
Dietary Vitamin ◽  
Swimming Crab ◽  
Female Crab ◽  
Portunus Pelagicus ◽  
Formulated Diets ◽  
Formulated Diet

Background: Currently, great progress in the artificial propagation of commercially important   portunid crabs of the genus Portunus has been achieved, and various methods have been adopted in mass-scale hatchery activities. This study analyzed the biological testing of formulated diets with different dose supplementations of vitamin E for the broodstock of female blue swimming crabs, P. pelagicus (Linnaeus, 1758) Methods: Female crab samples were collected from the coastal region of Padang, West Sumatra. The method used in this study was completely randomized design, with four treatment regimens (n=5 crabs each) of dietary vitamin E (0, 300, 600, and 900 IU/kg formulated diets). Results: The results show that the supplementation of vitamin E in the formulated diet had a significant effect (P <0.05) on the absolute weight growth, carapace length and carapace width. Conclusions: Supplementation of vitamin E on in formulated diet causes broodstock blue swimming crab molting, with a percentage value of 40–80% on day 20 and 20% on day 30, with a 100% survival rate.

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.

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