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

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.

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

Jurnal Teknologi ◽

10.11113/jt.v78.8209 ◽

2016 ◽

Vol 78 (4-2) ◽

Cited By ~ 1

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.

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

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/934/1/012015 ◽

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.

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

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2011/209406 ◽

2011 ◽

Vol 2011 ◽

pp. 1-5 ◽

Cited By ~ 3

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.

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First mass spectrometric report of cryptocyanin, a moulting protein from the mud crab Scylla serrata (Forskål, 1775) (Decapoda: Brachyura: Portunidae) in India

Journal of Crustacean Biology ◽

10.1093/jcbiol/ruaa094 ◽

2020 ◽

Author(s):

Manu Asthana ◽

Maqusood Ahamed ◽

Chittibabu Shanthi

Keyword(s):

Early Stage ◽

Binding Capacity ◽

Scylla Serrata ◽

Moult Cycle ◽

Ionization Mass ◽

Oxygen Binding ◽

Mud Crab ◽

Important Species ◽

Cuticle Formation ◽

The Matrix

Abstract The mud crab Scylla serrata (Forskål, 1775) is a highly abundant and economically important species throughout coastal India. Cryptocyanin plays an important role during the moult cycle of brachyuran crabs, and the presence of cryptocyanin and haemocyanin in oocytes, embryos, and zoeas of various species suggests that cryptocyanin is available from the very early stage of cuticle formation in development. Cryptocyanin is highly similar to haemocyanin in structure, but it is a copper-free enzyme that lacks an oxygen-binding capacity. Cryptocyanin has furthermore been reported as an important factor in immunity in crustaceans. The precise molecular weight of the cryptocyanin protein from gill tissues of S. serrata (79.11 kDa) is reported with the help of the matrix-assisted laser desorption/ionization mass spectrophotometry (MALDI-MS) technique.

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

Jurnal Kelautan Tropis ◽

10.14710/jkt.v23i1.7149 ◽

2020 ◽

Vol 23 (1) ◽

pp. 136 ◽

Cited By ~ 1

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%.

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Factors Influencing Consumer Behavior in Sustainable Fruit and Vegetable Consumption in Maramures County, Romania

Sustainability ◽

10.3390/su13041812 ◽

2021 ◽

Vol 13 (4) ◽

pp. 1812

Author(s):

Gratiela Dana Boca

Keyword(s):

Consumer Behavior ◽

Fruits And Vegetables ◽

Vegetable Consumption ◽

Consumer Preferences ◽

Sustainable Consumption ◽

Consumer Preference ◽

Healthy Food ◽

Future Research ◽

Consumer Attitude ◽

Or Education

The article explores consumer behavior in the context of sustainable consumption and the changes related to healthy food that have occurred during the pandemic. The study seeks to identify the factors that influenced consumer behavior on the consumption of fruits and vegetables. For this purpose, a questionnaire was applied to a sample of 1230 people from Maramures County, Romania. This study evaluates consumer behavior and attitudes on sustainable healthy food consumption; determining factors of consumer behavior are established by the needs, knowledge, selection of quality products, and the degree of culture and education in health diet issues. The study also presents a specific classification for fruits and vegetables in terms of consumer preferences and the clustering of local consumers by their interest in healthy food habits according to consumer culture, consumer loyalty, consumer needs, and consumer knowledge. In this study, it was revealed that consumer behavior consumption is not influenced by age, gender, or education. As a result of the correlation analysis, a positive relation was identified between the consumer preference, consumer attitude, and consumer behavior variables. The results of this study offer practical solutions and directions for future research on redesigning sustainable development of local, traditional foods. The new trend focuses on brand offerings and consumer needs for quality food and shows the consumer’s ethnocentrism and orientation for practical solutions.

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

Jurnal AGRISEP Kajian Masalah Sosial Ekonomi Pertanian dan Agribisnis ◽

10.31186/jagrisep.3.1.181-188 ◽

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

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Consumer Preferences and Socioeconomic Factors Decided on Plantain and Plantain-Based Products in the Central Region of Cameroon and Oyo State, Nigeria

Foods ◽

10.3390/foods10081955 ◽

2021 ◽

Vol 10 (8) ◽

pp. 1955

Author(s):

Patchimaporn Udomkun ◽

Cargele Masso ◽

Rony Swennen ◽

Bhundit Innawong ◽

Apollin Fotso Kuate ◽

...

Keyword(s):

Willingness To Pay ◽

Central Region ◽

Nutritional Value ◽

Consumer Preferences ◽

Household Survey ◽

Consumer Preference ◽

Cooking Methods ◽

Southwest Nigeria ◽

Survey Sample ◽

Similarity And Difference

Plantain is a key staple food in Central and West Africa, but there is limited understanding of its market in Africa. In addition, the cooking methods for enhancing the nutritional value, consumer preference, and willingness to pay for plantain and plantain-based products are not well understood. The knowledge gaps in the market and consumer dimension of the food chain need to be known to increase plantain utilization and guide breeding efforts. This research contributes by examining the cooking methods, consumer preference, and willingness to pay for plantain and plantain-based products in Cameroon and Nigeria. A household survey sample of 454 Cameroonian consumers in four divisions of Central Region and 418 Nigerian consumers in seven government areas of Oyo State in southwest Nigeria was the basis for the analysis. The results showed some levels of similarity and difference in the consumption and cooking of boiled, roasted, and fried plantain in both countries. The trend in consumption of all plantain-based products was constant in Cameroon but increased in Nigeria. The most important factor influencing Cameroonian consumers’ choice of plantain and its products was taste, while the nutrition trait influenced Nigerian consumers. Both Cameroonian and Nigerian consumers considered packaging, location of produce, and size and quantity as the least important factors. In addition, socioeconomic characteristics were significant determinants of consumers’ choices to consume plantain and its products. Gender significantly influenced (p < 0.05) taste, while nutrition was significantly driven (p < 0.05) by education and annual income. Household size played a significant role (p < 0.05) in consumers’ choices when the price was considered. These findings serve as a guideline to improve existing products to match the needs of consumers in each country and develop products for different consumer segments and potentially increase production.

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Sustainable crab fishery for Blue Economy in Kenya

Aquatic Ecosystem Health & Management ◽

10.14321/aehm.024.01.05 ◽

2021 ◽

Vol 24 (1) ◽

pp. 21-26

Author(s):

Esther N. Fondo ◽

Benrick Ogutu

Keyword(s):

Deep Sea ◽

Scylla Serrata ◽

North Coast ◽

Asian Countries ◽

Mud Crab ◽

Artisanal Fishers ◽

Blue Economy ◽

By Catch ◽

Longline Fisheries ◽

Potential Area

Abstract Lakes, rivers and oceans provide unique resources and support fisheries and aquaculture worldwide. The fisheries and aquaculture sector of Kenya contributes approximately 0.8% to the country’s GDP. Marine production is about 9 000 tonnes per year. Marine finfish form the bulk of the marine production, while shellfish (e.g. prawns, lobsters and crabs), molluscs (e.g. octopi and squids) are underexploited. The Fishery sector has the potential of about USD 5 billion for the Blue Economy in Kenya. Crab fishery in Kenya is active in some areas of the south and north coast. The crab resources along the Kenyan waters are diverse and a variety of species are edible. The most commonly fished crab by artisanal fishers is the Mangrove Mud Crab Scylla serrata. Semi-commercial and industrial fishers usually have portunid and other deep sea crabs as by-catch in trawl and longline fisheries, which in many cases are unutilized. Exports of live crabs have increased over the years, with exports mainly to Asian countries. Export of frozen crabs started recently. The need to sustainably utilize lake, river and ocean resources is recognized and important in promoting Blue Economy. Sustainable development of crab fishery provides a potential area for the Blue Economy development in Kenya. Research is essential to crab fishery development.

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

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v12i3.32939 ◽

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.

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