scholarly journals Perbedaan Metode Mutilasi Terhadap Lama Waktu Molting Scylla serrata

2019 ◽  
Vol 8 (2) ◽  
pp. 103
Author(s):  
Raden Ario ◽  
Ali Djunaedi ◽  
Ibnu Pratikto ◽  
Petrus Subardjo ◽  
Fauzia Farida
Keyword(s):  
Experimental Method ◽  
Economic Value ◽  
Treated Group ◽  
Total Weight ◽  
Scylla Serrata ◽  
Soft Shell ◽  
Increasing Demand ◽  
Mud Crabs

Kepiting bakau (Scylla serrata) memiliki nilai ekonomis tinggi. Kebutuhan kepiting bakau selalu meningkat sehingga perlu diupayakan budidaya kepiting bakau secara intensif. Salah satu perkembangan teknologi dalam budidaya perikanan untuk meningkatkan produksi kepiting bakau adalah produksi kepiting cangkang lunak. Kepiting cangkang lunak merupakan kepiting fase ganti kulit (molting) yang mempunyai keunggulan cangkangnya lunak sehingga dapat dikonsumsi secara utuh. Untuk mempercepat kepiting molting diperlukan berbagai rangsangan yang salah satunya adalah menggunakan metode mutilasi. Tujuan penelitian untuk mengetahui perbedaan lama waktu molting dan pertumbuhan berat kepiting bakau dengan menggunakan metode mutilasi pada kaki jalan dan capit. Metode penelitian yang digunakan yaitu metode eksperimental dengan rancangan acak lengkap (RAL) yang terdiri dari empat perlakuan, yaitu mutilasi kaki jalan dan capit, semua kaki jalan, capit, dan alami. Biota yang digunakan berjumlah 40 ekor dengan 10 kali ulangan tiap perlakuan. Data yang diperoleh berupa lama waktu molting serta pertambahan berat mutlak kepiting bakau yang dianalisis menggunakan uji statistik parametrik. Hasil penelitian menunjukkan metode mutilasi berpengaruh terhadap lama waktu molting dengan waktu molting tercepat pada perlakuan mutilasi kaki jalan dan capit rata-rata 13 hari. Metode mutilasi tidak berpengaruh terhadap pertumbuhan berat mutlak dengan nilai tertinggi pada kepiting perlakuan alami sebesar 53,30 gram. Mud crabs (Scylla serrata) are known to have a high economic value. The increasing demand of mud crabs for consumption rxcequires higher production. Therefore, mud crabs need to be cultivated intensively. One of the methods to improve the values of mud crabs’ aquaculture is by producing soft-shell crabs. Soft-shell crabs are produced during molting phase in which the crab shed it’s exoskeleton in order to grow. In the fisheries industry, the soft-shell crabs are considered to be more valuable as it can be consumed as a whole. Accelerating the production of molting crabs, requires stimulus. One of the methods is mutilation. The aim of this study is to estimate the periods required for molting under different treatments, as well as calculating the increase of total weight of molting crabs.. The method used was an experimental method which contained four treatments. The treatments are mutilation of walking legs and claws, all of walking legs, claws, and no mutilation. The number of crabs used was 40 with 10 replications per treatment. The data obtained in the period of molting and the increase of total weight of the mud crabs were analyzed using ANOVA. The result shows that mutilation affects the period of crab’s molting in which the fastest molting (13 days on average) occurred after mutilation of walking legs and claws. This mutilation method does not influence the increase of total weight and the highest value is showed in non-treated group with the increase of 53,30 grams in weight. 

Indeks Kondisi Kerang Bambu yang Didaratkan Di TPI Tasik Agung, Rembang, Jawa Tengah

2021 ◽  
Vol 10 (2) ◽  
pp. 200-204
Author(s):  
Aulia Dessy Ramadhani ◽  
Sri Redjeki ◽  
Jusup Suprijanto
Keyword(s):  
Economic Value ◽  
Condition Index ◽  
Total Weight ◽  
Size Selectivity ◽  
Weight Relationship ◽  
Central Java ◽  
Lack Of Information ◽  
Length Width ◽  
Increasing Demand ◽  
Index Value

Kerang bambu merupakan  salah  satu  jenis  Moluska  dari  famili  Solenidae  yang mempunyai nilai ekonomis. Potensi sumberdaya hayati kerang bambu ini menarik untuk diteliti lebih dalam mengingat permintaannya yang semakin meningkat. Upaya pengambilan kerang bambu jika tidak diimbangi dengan selektivitas ukuran dan dilakukan penangkapan secara terus-menerus maka dapat mengakibatkan hilangnya organisme ini. Mengingat masih minimnya informasi mengenai kerang bambu (Solen sp.) sehingga perlu dilakukan penelitian mengenai morfometri, hubungan panjang dan berat serta indeks kondisi kerang bambu. Tujuan dari penelitian ini adalah mengetahui hubungan panjang cangkang dan berat total serta nilai indeks kondisi dari kerang bambu (Solen sp.). Penelitian ini dilakukan dengan mengukur aspek morfometri seperti panjang, lebar dan berat total. Hasil penelitian menunjukkan hubungan antara panjang cangkang dan berat total memiliki nilai b = 3,99 dan R2=0.5742. Nilai indeks kondisi kerang bambu (Solen sp.) dari TPI Tasik Agung, Rembang, Jawa Tengah pada kategori kurus sebesar 1.9% dengan jumlah 1 ekor, kategori sedang sebesar 13,3% dengan jumlah 67 ekor dan kategori gemuk sebesar 86.4% dengan jumlah 433 ekor.Bamboo clams are type of mollusc from the Solenidae family that have economic value. The potential of bamboo clam is interesting to be investigated more deeply considering its increasing demand. Efforts to collect bamboo clams of it’s not balanced with size selectivity and continuous fishing can result in the loss of these organisms. Given the lack of information on bamboo clams (Solen sp.) it is necessary to conduct research on morphometry, length and weight relationship and condition index of bamboo clams. The purpose of this study was to determine condition index value of bamboo clams (Solen sp.). This research was conducted by measuring morphometric aspects such as length, width, and total weight. The result showed that the condition index value of bamboo clams (Solen sp.) in TPI Tasik Agung, R, Central Java in the thin category was 1.9% with 1 individuals, the moderate category was 13.3% with 67 individuals and the fat category was 86.4% with 433 individuals.

scholarly journals Morfometri Dan Pertumbuhan Scylla serrata (Filum: Arthropoda, Famili: Portunidae) Di Desa Panikel, Segara Anakan, Cilacap

2019 ◽  
Vol 22 (1) ◽  
pp. 57
Author(s):  
Widianingsih Widianingsih ◽  
Ria Azizah Tri Nuraini ◽  
Retno Hartati ◽  
Sri Redjeki ◽  
Ita Riniatsih ◽  
...  
Keyword(s):  
Condition Factor ◽  
Carapace Width ◽  
Growth Patterns ◽  
Total Weight ◽  
Scylla Serrata ◽  
High Demand ◽  
Purposive Sampling ◽  
Average Value ◽  
Female Sex ◽  
Mud Crabs

Mud crab is one of fishery commodities which is important in Indonesia . The high demand for mud crabs needs to be balanced with the right management strategy,  so that the population will not extinction.  Penikel Village, Cilacap is one of the fishing villages which catch mud crabs because of the high demand in the big cities such as Jakarta, Bandung and Bali.  The purpose of this study is  to determine the population and growth patterns of mud crabs in the Panikel Village, Kampung Laut District, Cilacap. The location of the study was determined by purposive sampling. Wadong and bubu are fishing tools to catch mud crabs. Sampling 67 mud crabs was carried out  on Juni 2016, after that, measurement of length, carapace width and total weight were carried out. Regression analysis between carapace width and total weight and condition factors were carried out to determine growth patterns. Based on the research, the average value of the S. serrata   length was 63.94±11.31 mm while the female one was 70.29±14.57 mm. The average value of carapace width is 92.28±15.51 mm (male) while for female sex was 98.71±18.38 mm. The average weight of S. serrata male crabs was 190.31±118.43 mm, while those of female sex were 210.77±120.93 mm. Furthermore, based on the analysis of the relationship between the length of weight found negative allomatric growth pattern with the value of the condition factor included in the low category both for male sex 0.73-1.93 and for female sex 0.59-1.66.  The low condition factor shows that the condition of Segara Anakan waters especially Penikel Village does not support the growth of mud crabs (S. serrata). Kepiting bakau (Scylla serrata) merupakan salah satu komoditas perikanan yang terpenting di Indonesia.  Besarnya permintaan  kepiting bakau yang tinggi perlu diimbangi dengan strategi pengelolaan yang tepat agar populasi tidak punah. Desa Penikel, Cilacap merupakan satu desa nelayan yang banyak menangkap kepiting bakau karena tingginya permintaan di kota besar seperti Jakarta, Bandung dan Bali. Tujuan dari penelitian ini untuk mengetahui populasi dan pola pertumbuhan kepiting bakau di Desa Panikel, Kecamatan Kampung Laut, Cilacap. Penentuan lokasi penelitian dilakukan secara purposive sampling. Wadong dan bubu merupakan alat tangkap untuk menangkap kepiting bakau. Pengambilan sampel kepiting sebanyak 67 individu  dilakukan pada bulan Juni 2016, setelah itu dilakukan pengukuran panjang, lebar karapas serta berat total. Analisa regresi kurva antara lebar karapas dan berat total serta  faktor kondisi dilakukan untuk mengetahui pola  pertumbuhan. Berdasarkan penelitian diperoleh nilai rata-rata panjang kepiting bakau S. serrta jantan adalah 63.94±11.31 mm sedang untuk yang betina adalah 70,29±14.57 mm. Nilai rata-rata lebar karapas adalah 92.28±15.51 mm (jantan) sedang untuk jenis kelamin betina adalah 98.71±18.38 mm. Rata-rata berat kepiting jantan S. serrata adalah 190.31±118.43 mm, sedangkan yang jenis kelamin betina adalah 210.77±120.93 mm. Selanjutnya berdasarkan analisa hubungan panjang berat ditemukan pola pertumbuhan allomatrik negatif dengan nilai factor kondisi termasuk dalam katagori rendah baik untuk jenis kelamin jantan 0,73–1,93 maupun untuk kelamin betina 0,59–1,66.  Rendahnya factor kondisi menunjukkan bahwa kondisi perairan Segara Anakan khususnya Desa Penikel tidak menunjang bagi petumbuhan kepiting bakau (S. serrata).

scholarly journals Mangrove ecosystem in North Sumatran (Indonesia) forests serves as a suitable habitat for mud crabs (Scylla serrata and S. olivacea)

2021 ◽  
Vol 22 (3) ◽  
Author(s):  
RIKA KARNIATI ◽  
NURDIN SULISTIYONO ◽  
RIZKA AMELIA ◽  
BEJO SLAMET ◽  
YUNTHA BIMANTARA ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Abiotic Factors ◽  
Economic Value ◽  
Canopy Cover ◽  
Stand Density ◽  
Mangrove Ecosystem ◽  
Scylla Serrata ◽  
Suitable Habitat ◽  
Biotic Factors ◽  
Mud Crabs

Abstract. Karniati R, Sulistiyono N, Amelia R, Slamet B, Bimantara Y, Basyuni M. 2021. Mangrove ecosystem in North Sumatran (Indonesia) forests serves as a suitable habitat for mud crabs (Scylla serrata and S. olivacea). Biodiversitas 22: 1489-1496. Mud crabs (Scylla serrata and Scylla olivacea) are often found in muddy substrates associated with mangrove vegetation. The habitat of these crabs ranges from tropical estuaries to sheltered subtropical areas, riverbanks, lower river traits, and intertidal areas. These crabs have an important economic value, and it increases the income of the communities living around the mangrove area. This study aims to obtain more information on the environmental factors of habitat for mud crabs (S. serrata and S. olivacea): insights on the effects of abiotic and biotic factors and potential economic value, in the village of Lubuk Kertang, Langkat, North Sumatra, Indonesia. Data were collected by measuring abiotic factors (temperature, pH, salinity, dissolved oxygen, mud depth, distance from the river) and biotic factors (mangrove stand density through canopy cover). The dataset was analyzed using a binary logistic regression analysis with a stepwise method. Results showed that the abiotic factors that contributed to the presence of the mud crab were dissolved oxygen and a mud depth of 68.7%. Meanwhile, the remaining 31.3% that contributed to the presence of mud crabs were abiotic factors (temperature, pH, salinity, distance from rivers) and biotic factors (stand density through canopy cover). The present study suggests that dissolved oxygen and mud depth have an important function in predicting the presence of mud crabs.

scholarly journals EFFECT OF FOOD TYPES AND HABITATS ON THE VALUE OF FEMALE MATURITY INDEX (FMI) AND GONADO SOMATIC INDEX (GSI) IN THE EGG PRODUCTION OF MANGROVE CRABS, Scylla serrata

2015 ◽  
Vol 2 (1) ◽  
pp. 354
Author(s):  
G. Nugroho Susanto ◽  
Sri Murwani ◽  
Muhammad Zulhafid
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Economic Value ◽  
Tidal Flow ◽  
Maturity Index ◽  
Scylla Serrata ◽  
Egg Development ◽  
Increasing Demand ◽  
Mangrove Crabs ◽  
Somatic Index

<p>Mangrove crabs (Scylla serrata) is one of fishery commodities with high economic value for its good taste and nutrients content. Currently, increasing demand for this Crustacean species caused declining its population and for this reason, cultures of brooding crabs have been attempted. This study was carried out to investigate the egg development of mangrove crabs, with the main focus to study the effects of food types and habitats on the value of female maturity index (FMI) and gonado-somatic index (GSI). To investigate the effects of habitats, experiments were carrried out in the two habitats namely tidal flow of pond area and mangrove area. The spawning crabs were reared in a bamboo cage with the size of 2x1,5x1m3 divided into three paralel partition for 9-12 crabs with body weight of 200-250 grams. The crabs in the three partition were fed with three different foods, namely fish for the first partition, squid for the second, and mussel for the third. The results showed that no significant effect of foods and habitats was observed on the value of FMI. However, squid and mangrove habitats affected the growth, such as: an increase the wide of fifth abdomen segment, the widest abdomen segment and body weight during egg development periods. On the other hand, no significant different value of GSI was found on different habitats, but the food types affected the value of GSI.</p><p><br /><strong>Keywords</strong> : mangrove crabs, FMI, GSI, egg production</p>

Pemanfaatan Tambak Tradisional untuk Budi Daya Kepiting Bakau

2021 ◽  
Author(s):  
Heppi Iromo ◽  
◽  
Dori Rachmawani ◽  
Abdul Jabarsyah ◽  
Zainuddin Zainuddin ◽  
...  
Keyword(s):  
Carrying Capacity ◽  
Economic Value ◽  
Mangrove Ecosystem ◽  
Fishing Effort ◽  
Mangrove Forests ◽  
Mud Crab ◽  
Crab Population ◽  
Aquaculture Ponds ◽  
Increasing Demand ◽  
Mud Crabs

Traditional pond is aquaculture place from the conversion of mangrove forests. The tradisional ponds in this area are still surrounded by mangrove, and many of which are still overgrown with mangroves in the pond. The traditional ponds are to aquaculture of shrimp and milkfish. Currently due to the decrease in environmental carrying capacity in traditional ponds cause a decrease of production. So there needs to be another alternative to optimize aquaculture ponds, namely by changing the types of animals reared from shrimp to mud crabs. Mud crab is a commodity economic value and lives naturally in the mangrove ecosystem. The increasing demand of mud crab causes an increase to catch of crab in nature. If the fishing effort is carried out in a sustainable manner without efforts to aquaculture of mud crabs there will be a decline population of mud crab in the future. These two problems, if put together will become a solution that have the potential to have economic value for increasing the mud crab population and have productive value for tradisional pond, namely by developing crab cultivation in traditional ponds. This book reveals how to manage traditional ponds into good aquaculture lands and make optimal use of this land to develop several aquaculture businesses of mud crabs.

scholarly journals PARAMETER POPULASI KEPITING BAKAU (Scylla serrata) DI PERAIRAN PASAMAN BARAT

2018 ◽  
Vol 9 (3) ◽  
pp. 207
Author(s):  
Thomas Hidayat ◽  
Helman Nur Yusuf ◽  
Nurulludin Nurulludin ◽  
Andina Ramadhani Putri Pane
Keyword(s):  
Economic Value ◽  
Total Mortality ◽  
Scylla Serrata ◽  
Fishing Gear ◽  
Population Parameter ◽  
Fishing Mortality ◽  
Mud Crab ◽  
Exploitation Rate ◽  
Long Time ◽  
Mud Crabs

Pemanfaatan sumber daya kepiting bakau (Scylla serrata) di perairan Pasaman Barat sudah lama dilakukan oleh nelayan kecil dengan menggunakan bubu (tangkul) yang bersifat tidak selektif. Sebagai komoditi perikanan yang mempunyai nilai ekonomis penting di Indonesia, perlu dilakukan pengelolaan yang tepat agar ketersediaannya tetap berkelanjutan. Penelitian dilaksanakan bulan Januari - November 2016, dengan tujuan mengkaji beberapa parameter populasi sebagai bahan kebijakan pengelolaan kepiting bakau di perairan Pasaman Barat agar tetap lestari. Pengumpulan sampel dilakukan secara acak dari hasil tangkapan nelayan oleh enumerator. Metode analisis parameter populasi menggunakan distribusi frekwensi lebar karapas dengan bantuan program FiSAT (FAO-ICLARM Stock Assessement Tools)-II. Hasil analisis diperoleh laju pertumbuhan (K) sebesar 0,63 pertahun, (CW)= 178,5 mm, kematian alami (M) 1,06 pertahun, kematian karena penangkapan (F)= 1,03 per tahun, dan kematian total (Z)=2,09 pertahun. Tingkat eksploitasi (E) =0,49. Tingkat pemanfaatan kepiting bakau di perairan Pasaman Barat sudah pada tahapan yang jenuh (fully exploited). Pembatasan alat tangkap merupakan opsi yang paling memungkinkan.Mud crab (Scylla serrata) is one of fisheries commodity that has an important economic value in Indonesia. Utilization of mud crabs in West Pasaman had been exploited for years long time with traps fishing gear. The research was conducted in January - November 2016 in the waters of West Pasaman. Sampling were conducted randomly. This paper aims to determine some population parameters of mud crab to used as a guidance guidance in the management of mud crab. in the waters of West Pasaman. Population parameter data analysis using software FiSAT (FAO-ICLARM Stock assessement Tools) II. The results of population dynamic parameters of mud crab showed that growth rate (K) was 0.63 per year, Length infinity (L) was 178.5 mm, natural mortality (M) was 1.06 per year, fishing mortality (F) was 1.03 per year, and total mortality (Z) 2.09 per year. Exploitation rate (E) was 0.49. The exploitation rate of mud crabs in the waters of West Pasaman were (fully exploited), the fishing need to be managed carefully, limitation of fishing gear is the most likely option to be enforced.

scholarly journals Growth and survival of Mud Crab, Scylla serrata, reared in bottom and floating cages within Mida Creek mangroves, coastal Kenya

2021 ◽  
Vol 24 (1) ◽  
pp. 27-34
Author(s):  
James M. Mwaluma ◽  
Boaz Kaunda-Arara
Keyword(s):  
Survival Rates ◽  
Total Weight ◽  
Scylla Serrata ◽  
Production Cycle ◽  
Mud Crab ◽  
Growth And Survival ◽  
Culture Techniques ◽  
Male Crab ◽  
Significant Difference ◽  
Mud Crabs

Abstract Mud Crab fattening is a relatively new business idea in Kenya and is highly lucrative due to the reasonable prices offered at tourist hotels. This study was aimed at developing appropriate culture techniques for Mud Crabs to maximize harvestable biomass by the local communities and avoid recruitment overfishing. Growth and survival rates for mixed sex Mud Crabs was investigated for a period of 230 days in Mida Creek, Kenya, using bottom and floating cages, and two feed types in a crab fattening experiment. Crabs attained harvestable weight by the third month for both floating (466.2 ± 137 g) and bottom cages (542.2 ± 109.3 g). There was no significant difference in mean total weight of mixed-sex crabs in the two culture systems (t = 1.75, p&gt;0.05), however males showed significantly higher total weight gain compared to females. A higher overall survival rate was found for crabs cultured in floating cages (63.8%), compared to bottom cages (44.9%). There was no significant difference in growth performance between crabs fed gastropod tissues and those fed fish offal. The long-term specific growth rate for floating cages (0.69 g d-1) was not significantly different from that of bottom cages (0.92 g d-1). An analysis of potential return on investment showed the floating cages to be more profitable per production cycle compared to the bottom ones. The floating cage system and mono-sex male crab culture are recommended to farmers within mangrove tidal flats in Kenya.

scholarly journals Distribusi Scylla spp. di perairan estuari Sungai Donan Segara Anakan Bagian Timur, Cilacap

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Sulistiono Sulistiono ◽  
Nurul Musyariafah Yahya ◽  
Etty Riani
Keyword(s):  
Economic Value ◽  
Scylla Serrata ◽  
Mangrove Forests ◽  
Mud Crab ◽  
Mangrove Species ◽  
Central Java ◽  
Rhizophora Apiculata ◽  
Mangrove Ecosystems ◽  
Avicennia Alba ◽  
Mangrove Crabs

Mangrove forests are ecosystems that make up coastal areas and river estuaries. The examples of mangrove ecosystems found in Indonesia are in Segara Anakan, Central Java. One of the aquatic biota with the economic value found in the mangrove forest ecosystem is the mud crab (Scylla spp.). The purpose of this study was to assess the distribution of mangrove crabs (Scylla spp.) to the presence of mangrove species in the mouth of the Donan River, Segara Anakan. A sampling of crabs and observations of mangrove vegetation were carried out at five stations spread from the river to the sea. The results showed that there were three types of mangrove crabs caught in the vicinity of the study, namely Scylla tranquebarica, S. olivacea, and S. serrata. The types of mangroves found include Rhizophora apiculata, R. mucronata, Avicennia rumphiana, A. alba, A. officinalis, and Nypa. Regression analysis showed that mangrove density correlated with the abundance of Scylla tranquebarica and Scylla olivacea, but contradicts the abundance of Scylla serrate. PCA analysis showed that the Crab species Scylla tranquebarica and Scylla olivacea were associated with mangroves of Avicennia alba, Avicennia rumphiana, and Rhizophora apiculata. Meanwhile, Scylla serrata crabs are associated with Avicennia officinalis.

Inter-basin water transfer

2021 ◽  
pp. 15-32
Author(s):  
Shima Kheirinejad ◽  
Omid Bozorg-Haddad ◽  
David Quanrud
Keyword(s):  
Water Resource Management ◽  
Economic Value ◽  
Water Transfer ◽  
Management Tool ◽  
Social Challenges ◽  
Basin Water ◽  
Increasing Demand ◽  
Water Transmission ◽  
Water Scarce ◽  
The Cost

Abstract Providing water to satisfy human demands is one of the greatest challenges of the present century and has been the source of many changes in the world. Since the amount of renewable water the Earth receives is only equal to, or even less than, that received many years ago, renewable water per capita decreases as human population increases. Inter-basin water transfer is a method to augment supply in water-scarce regions. Increasing demand for water in some areas sometimes justifies the transfer of water from one basin to another. Water consumption in densely populated cities and in large industrial and agricultural operations produces an economic value that justifies the cost of expensive water transport equipment and infrastructure such as transmission channels, pipelines, pumping stations and dams. Under these conditions, water that is not in high demand in one basin is transferred to another basin for use. These projects are supply-driven engineering solutions to major social challenges. Inter-basin water transmission is carried out across local, regional, national, and international boundaries to overcome water scarcity, to meet demand in the agricultural, industrial and domestic sectors as well as to achieve economic and social development. Inter-basin transfer (IBT) is an important water resource management tool that can have significant impacts on the donor and recipient basins. This chapter aims to provide insights into the concepts, logics, methods and tools used to evaluate inter-basin transfer projects. Challenges that may arise with implementation of such projects and management methods to overcome these challenges are reviewed. Several case study examples of existing projects are presented to provide insight into how to better manage such projects in the future.

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