ECTOPARASITES AND VIBRIOS ASSOCIATED WITH FATTENING CULTURED MUD CRABS [Scylla serrata (Forsskal, 1775)] FROM PEMALANG COAST, INDONESIA

2016 ◽  
Vol 78 (4-2) ◽  
Author(s):  
Sarjito Sarjito ◽  
Alfabetian Herjuno Condro Haditomo ◽  
Desrina Desrina ◽  
Ferdian Bagus Ferinandika ◽  
Lilik Setyaningsih ◽  
...  
Keyword(s):  
Bile Salt ◽  
Clinical Sign ◽  
Clinical Signs ◽  
Weak Condition ◽  
Scylla Serrata ◽  
Mud Crab ◽  
Mud Crabs

Infectious of ectoparasites and vibrios were  found as a problem in fattening mud crab. The aims of this study were to determine the clinical sign of infected mud crabs and to identify the ectoparasites and generic vibrio in the fattening mud crabs from Pemalang Coast, Indonesia. Ectoparasites were collected by smear method. Whereas, 20 isolates were collected from hepatopancreas, gills, hemolymph and injured carapace of the mud crabs. Thiosulphate Citrate Bile Salt Sucrose (TCBS) medium was used to isolate suspected vibrios. The clinical signs of mud crabs infected by ectoparasites were shown through the damaged gills and the attachment of other organisms on the gills, whereas the clinical signs of mud crabs infected by vibriosis were shown through red spot on carapace and wound in carapace, claw and abdomen, followed by weak condition. It also indicated that seven ectoparasites were Ichthyobodo sp., Epistylis sp., Carchesium sp., Vorticela sp., Octolasmis sp., Lepeophtherius sp, and Copepodit sp., whilst five Vibrios were V. harveyi, V. Cholerae, V. parahaemolyticus, V. alginolyticus and V. fischeri. 

scholarly journals Study of Growth and Survival of Mud Crab (Scylla serrata, Forskal) with Different Salinity Levels in culture media

2021 ◽  
Vol 934 (1) ◽  
pp. 012015
Author(s):  
Eddiwan ◽  
T Dahril ◽  
Adriman ◽  
Budijono ◽  
Efawani ◽  
...  
Keyword(s):  
Culture Media ◽  
Salt Content ◽  
Optimal Level ◽  
Scylla Serrata ◽  
Mud Crab ◽  
Growth And Survival ◽  
Mangrove Crab ◽  
Salinity Levels ◽  
B 31 ◽  
Mud Crabs

Abstract The aim of this study to find out the optimal level of salinity for the growth and survival of the mud crab (Scylla serrata). The weight of crab seeds were about 47.65-51.32 grams and the carapace length ranged from 64.35-71.30 mm, then put into 12 tanks (1 m x 1 m x 0.4 m) with a density of 4 crab seed per tank. During the maintenance of this test, mangrove crab was fed with fresh chicken intestines as much as 10% of its body weight per day. Water changes are carried out more than 150% per week. At the beginning of the experiment, each tank was conditioned to the same water salinity in all experimental units, namely 33 ppt. To see the effect of differences in salinity levels on the growth and survival of mud crabs, 4 treatments were made consisting of (A) 33 ppt salt content, (B) 31 ppt salt content, (C). The salt content is 29 ppt, and (D) the salt content is 27 ppt. From the results of this experiment, it is known that a decrease in the salt content of 4 ppt is the best treatment for the growth of mud crabs, but has no effect on the survival value.

scholarly journals Isolation and Identification ofAcholeplasmasp. from the Mud Crab,Scylla serrata

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Ji-Gang Chen ◽  
Dan Lou ◽  
Ji-Fang Yang
Keyword(s):  
Cell Wall ◽  
Scylla Serrata ◽  
Rrna Gene ◽  
Mud Crab ◽  
Isolation And Identification ◽  
A Cell ◽  
First Time ◽  
The 16S Rrna Gene ◽  
Ferment Glucose ◽  
Mud Crabs

For the first time, a mollicute-like organism (MLO) was cultured from moribund mud crabs (Scylla serrata) during an outbreak of clearwater disease in Zhejiang Province, China. The MLO displayed a fried-egg colony morphology in culture, did not possess a cell wall, and was not retained by 0.45 μm and 0.2 μm filters. It was able to ferment glucose, sucrose, lactose, and maltose, but it did not utilize arginine and urea. The MLO grew in the absence of bovine serum and was not susceptible to digitonin. Sequence analysis of the 16S rRNA gene revealed that this MLO had 99% identity withAcholeplasma laidlawiiPG-8A, which indicates that the organism isolated from mud crabs is a member of the genusAcholeplasma.

scholarly journals Growth analysis, mortality and exploitation level of Mud Crab Scylla serrata, Forskål 1775, (Malacostraca : Portunidae) in Mangkang Wetan waters, Semarang, Central Java, Indonesia

2020 ◽  
Vol 23 (1) ◽  
pp. 136 ◽  
Author(s):  
Ervia Yudiati ◽  
Arumning Tias Fauziah ◽  
Irwani Irwani ◽  
Agus Setyawan ◽  
Insafitri Insafitri
Keyword(s):  
Scylla Serrata ◽  
Survey Method ◽  
Mud Crab ◽  
Growth Study ◽  
High Demand ◽  
Central Java ◽  
Reference Information ◽  
Exploitation Rate ◽  
Over Exploitation ◽  
Mud Crabs

Awareness of Mud Crab over exploitation in Mangkang Wetan Waters has been noticed. One of the reference information is the growth study to determine the condition of the mud crab population. High demand encourages the fisherman to catch more, which leads to overexploitation in nature. The study aimed to estimate the growth, mortality, and exploitation rate of mud crabs. The 921 mud crabs samples were collected from Mangkang Wetan Waters from October 2018 to January 2019. The method used was the survey method. The crabs were taken once a week for 4 months. The width and weight of crab carapace were measured. The growth rate of S. serrata was 0.93/year (male) and 0.69/year (female). The natural mortality rate of S. serrata was 1.08/year (male) and 0.89/year (female), the mortality of catch (F) was 0.55/year (male) and 1.09/year (female). The rate of exploitation of male S. serrata reached 34%, and the rate of exploitation of female S. serrata was 55%. The exploitation of female S. serrata shows that overexploitation has occurred because the optimum value of exploitation (E-OPTIMUM) is equivalent to E=50%.

scholarly journals ANALISIS EFISIENSI EKONOMI DAN PRODUKSI KEPITING BAKAU (Scylla serrata) DALAM KARAMBA

2006 ◽  
Vol 3 (1) ◽  
pp. 181-188
Author(s):  
Zamdial Ta'aladin
Keyword(s):  
Economic Efficiency ◽  
High Weight ◽  
Cell System ◽  
Scylla Serrata ◽  
Mud Crab ◽  
Length Growth ◽  
Weight Growth ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Mud Crabs

The objective  of this research  was to analyisis   of economic  efficiency,  production  of Muds Crab  that reared in  bambbo  cage and  to  determine  of  density  and  bamboo  cage  design  that  suffable  for  rearing  of  Mud Crab(Scylla   serrata).Research    was  used  the Factorial   Completely  Randomized   Design  with  the  dffferent treatement   consist  of density  and   bamboo cage construction.  Size of bamboo  cage are 2 x 2 x 0,5 m. The rearing periode  of Mud Crabs are 45 days wffh observation  and measurement  of weight and length growth in each  15 days.  For  determine  of  teratement  of density  and   bamboo  cage  construction  on the Mud  Crabs production  used  the statistical  test, while the economic  analysis was using BlC ratio  investement  criteria. The P1  ancJ P2  treatement   showed   the response of high   weight  growth  and signiflCBl1t with  Pl   The cell system bamboo  cage  showed    the respon~    of high  weight  growth  and Significant  from  the boxs  system  bamboo cage.    For  the length  growth,  P1 highly  and  significant   from  the others  treatement. The BlC  ratio  analysisi showed  that P3 treatement  both the cell and boxes system  bamboo cage  showed  the better result, while theP3  BIG ratio value of cell system  bamboo cage is highly in compare  with the boxes system bamboo cage. Key words :Economic efficiency, production, muds crub, bamboo cage

scholarly journals Consumer Preferences and Willingness to Pay for Mud Crabs in Southeast Asian Countries: A Discrete Choice Experiment

Foods ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2873
Author(s):  
Zubayer Sayeed ◽  
Hiroaki Sugino ◽  
Yutaro Sakai ◽  
Nobuyuki Yagi
Keyword(s):  
Willingness To Pay ◽  
Consumer Preferences ◽  
Sustainable Consumption ◽  
Consumer Preference ◽  
Southeast Asian ◽  
Scylla Serrata ◽  
Asian Countries ◽  
Mud Crab ◽  
Important Species ◽  
Mud Crabs

The mud crab (Scylla Serrata) is an economically important species found in the mangroves and estuaries of tropical countries and is a popular seafood product in the coastal areas of Southeast Asian markets. The aim of this study is to identify factors affecting consumer preference of mud crabs, and to understand consumers’ willingness to pay (WTP) for these factors in a Singapore market where imported mud crabs from other Asian countries are sold. The results showed that the country of origin matters to participants, affecting purchasing decisions, and consumers were willing to pay approximately 16.48 SGD (11.49 USD, the average price of four shops: 35.55 USD/kg for one mud crab) more if the mud crabs were from Sri Lanka if compared with Indonesian or Cambodian mud crabs. Moreover, consumers were willing to pay 25.08 SGD (17.48 USD) more if the mud crabs were alive and 13.40 SGD (9.34 USD) less if the mud crabs were frozen compared with fresh, but not alive, mud crabs. Furthermore, consumers’ preference in mud crab was associated with the consumers’ religion. Some groups of consumers preferred female mud crabs with eggs over male mud crabs, while other groups preferred male crabs. The results identified diverse consumer preference of mud crabs and, therefore, could provide new insights that are useful for sustainable consumption of mud crabs in the region.

scholarly journals EVALUATION OF THE USE OF MALANG SAND AS A FILTER MATERIAL ON WATER QUALITY, PHYSIOLOGICAL RESPONSES AND PRODUCTION PERFORMANCE OF MUD CRAB Scylla serrata

2020 ◽  
Vol 12 (3) ◽  
pp. 833-848
Author(s):  
Yuni Puji Hastuti ◽  
Arul Tabah Prastomo ◽  
Ridwan Affandi ◽  
Wildan Nurussalam ◽  
Dudi Muhammad Wildan ◽  
...  
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Physiological Responses ◽  
Production Performance ◽  
Scylla Serrata ◽  
Mud Crab ◽  
Feed Conversion ◽  
Absolute Growth Rate ◽  
Absolute Growth ◽  
Mud Crabs

Mud crab Scylla serrata is one of crustacean commodities with high economic value. One of the unsolved obstacles in mud crabs cultivation is crabs’ stress level caused by the declining water quality. The recirculating system is a method for maintaining water quality throughout the rearing period of culture crab. This system can use a variety of physical filter materials, such as zeolite, sand, and other materials. This study aimed to determine the amount of malang sand as a physical filter which positively affect the physiological responses and production performance of mud crabs. This research was carried out using a recirculating system with a completely randomized design conducted in five treatments with three replicates, i.e., malang sand with a weight of 0 kg (control), 5 kg, 10 kg, 15 kg, and 20 kg. The results proved that the best physiological response and production performance of mud crab was observed at malang sand treatment with a weight of 5 kg. This treatment showed specific growth rate, absolute growth rate for body weight, absolute growth rate for body length, and the survival rate of mud crabs with the highest value of 0.18±0.061%, 0.13±0.05 g/day, 0.0016±0.00006 cm/day, and 77.77%, respectively, yet it had the lowest feed conversion ratio of 3.76±004. In addition, the 5 kg treatment had water quality parameters in the tolerable ranges for mud crabs’ growth.

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 Biomorfometri Kepiting Bakau di Perairan Bandengan Kendal

2020 ◽  
Vol 9 (1) ◽  
pp. 55-64
Author(s):  
Shofi Firda Safitri ◽  
Sunaryo Sunaryo ◽  
Ali Djunaedi
Keyword(s):  
Carapace Width ◽  
Scylla Serrata ◽  
Scylla Paramamosain ◽  
Mud Crab ◽  
Foreign Markets ◽  
Female Crab ◽  
Ratio Condition ◽  
Mangrove Crabs ◽  
The Relationship ◽  
Mud Crabs

 ABSTRAK: Kepiting Bakau (Scylla sp.) merupakan sumberdaya kelautan penting di Indonesia dan permintaan terhadap komoditi Kepiting Bakau cenderung meningkat, baik di pasar lokal maupun mancanegara. Peningkatan permintaan Kepiting Bakau dapat menyebabkan terganggunya populasi kepiting di alam. Penelitian ini bertujuan untuk mengkaji biomorfometrik Kepiting Bakau (Scylla sp.) yang meliputi ukuran lebar karapas Kepiting Bakau, hubungan lebar karapas dan berat, nisbah kelamin, faktor kondisi dan tingkat kematangan gonad Kepiting Bakau di perairan Bandengan Kendal pada November 2018 sampai Februari 2019. Penelitian menggunakan metode deskriptif eksploratif. Hasil penelitian menunjukkan, bahwa jumlah Kepiting Bakau yang diamati sebanyak 1914 ekor, terdiri atas 897 betina dan 1017 jantan, terdapat empat spesies Kepiting Bakau yang tertangkap di perairan Bandengan Kendal, yaitu Scylla serrata, Scylla tranquebarica, Scylla paramamosain dan Scylla olivacea, perbandingan betina dan jantan 1:1,19. Ukuran lebar karapas berkisar antara 43,75-165,5 mm dengan berat berkisar antara 23-660 g. Hubungan lebar karapas dengan berat bersifat allometrik negatif. Nilai faktor kondisi yang didapatkan berkisar 1,66–1,189. Tingkat kematangan gonad kepiting betina didominasi oleh TKG I dan II, pada bulan November 2018 – Februari 2019 di perairan Bandengan Kendal belum terjadi masa puncak pemijahan.  ABSTRACT: Mud crabs (Scylla sp.) are important marine resources in Indonesia and demand for mud crabs tends to increase, both in local and foreign markets. Increased demand for Mangrove Crabs can cause disruption to the population of crabs in nature. This study to examine the morphometrics of Mud Crabs (Scylla sp.) Which include the size of the width of the Mud Crab carapace, the relationship between carapace width and weight, sex ratio, condition factors and the level of maturity of the Mud Crab in Bandengan Kendal waters from November 2018 to February 2019. The descriptive explorative methods was used in this research. The results showed that the number of mud crabs caught from November 2018 to February 2019 was 1914, consisting of 897 females and 1017 males, there were four species of mud crabs caught in Kendal Bandengan waters, namely Scylla serrata, Scylla tranquebarica, Scylla paramamosain and Scylla olivacea, comparison of females and males 1: 1,19. Carapace widths range from 43.75 - 165.5 mm with weights ranging from 23 - 660 g. The relationship between carapace width and weight are negative allometric. The obtained condition factor values range from 1.66 - 1.189. The maturity level of female crab gonads are dominated by TKG I and II, thus it is suspected that in November 2018 - February 2019 in the waters of Bandengan Kendal, the spawning peak has not yet occurred.

scholarly journals POPULATION CHARACTERISTICS OF MUD CRAB (Scylla serrata) IN THE WATERS OF KENDARI BAY AND SURROUNDING AREAS

2018 ◽  
Vol 24 (2) ◽  
pp. 117
Author(s):  
Ali Suman ◽  
Ap'idatul Hasanah ◽  
Khairul Amri ◽  
Andina Ramadhani Putri Pane ◽  
Pratiwi Lestari
Keyword(s):  
Mortality Rate ◽  
Carapace Width ◽  
Population Characteristics ◽  
Scylla Serrata ◽  
Survey Method ◽  
Market Demand ◽  
Mud Crab ◽  
Study Results ◽  
Exploitation Rate ◽  
Mud Crabs

The high market demand for mud crabs (Scylla serrata) has caused intensive fishing for this resources and tended to threaten their sustainability. Studies of population characteristics are the main bases for formulating management measures for sustainable utilization. The purpose of this study was to determine the population characteristics of mud crabs in the waters of Kendari Bay and its surrounding waters. The study was conducted from January to November 2016 using survey method. The study results revealed that the mud crab growth pattern in Kendari Bay was negative allometric and that the ratio of males and females was imbalance. The length at first maturity (Lm) was at a carapace width of 109.8 mm. The growth rate (K) was 1.01 per year and the maximum carapace width (L) was 206 mm. The estimated total mortality rate (Z), fishing mortality rate (F), and natural mortality rate (M) were 3.20 per year, 2.17 per year, and 1.03 per year, respectively. The exploitation rate (E) was 0.68 per year. Therefore, the exploitation rate had reached 136%, which is categorized as overfishing. In order to ensure the sustainability of the mud crabs, there is needed to apply the precautionary approach, such as reducing fishing effort by 36% of the current situation.

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>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.

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