Sustainable crab fishery for Blue Economy in Kenya

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

Foods ◽

10.3390/foods10112873 ◽

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.

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A new shell disease in the mud crab Scylla serrata from Port Curtis, Queensland (Australia)

Diseases of Aquatic Organisms ◽

10.3354/dao043233 ◽

2000 ◽

Vol 43 ◽

pp. 233-239 ◽

Cited By ~ 9

Author(s):

LE Andersen ◽

JH Norton ◽

NH Levy

Keyword(s):

Scylla Serrata ◽

Mud Crab ◽

Shell Disease

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Characterization of Major Allergens of Local Mud Crab (Scylla serrata)

Scientific Research Journal ◽

10.24191/srj.v12i1.5434 ◽

2015 ◽

Vol 12 (1) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

Rosmilah Misnan ◽

Nurul Izzah Abdul Rahman ◽

Zailatul Hani Mohd Yadzir ◽

Noormalin Abdullah ◽

Mohd Faizal Bakhtiar ◽

...

Keyword(s):

Mass Spectrometry ◽

Arginine Kinase ◽

Mass Spectrometry Analysis ◽

Scylla Serrata ◽

Mud Crab ◽

Meat Allergy ◽

Proteomic Approach ◽

The World ◽

Major Allergens ◽

Crab Meat

Crab meat is widely consumed in several countries around the world. However, when consumed, crab meats are frequent cause of allergic reactions throughout the world. Scylla serrata is among the most common mud crab in Malaysia. In a previous study two major allergens of mud crab at 36 and 41 kDa was identified. Thus, the aim of this study is to further identify these major allergens by a proteomic approach. Protein extract was prepared and resolved by 2-dimensional electrophoresis (2-DE). Immunoblotting was then performed using reactive sera from patients with crab allergy. Major allergenic spots were then excised from the 2-DE gel and analysed by mass spectrometry. The 2-DE profile of the extract revealed approximately >100 protein spots between pH of 4.00 to 8.00. Mass spectrometry analysis has identified the 36 and 41 kDa proteins as tropomyosin and arginine kinase, respectively. Our findings indicated that tropomyosin and arginine kinase play a major role in allergic reaction to mud crab meat among local patients with crab meat allergy, and should be included in diagnostics and therapeutic strategies of this allergy.

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Effect of the addition of crude fish oil (CFO) in feed to the content of EPA and DHA in mud crab (Scylla serrata)

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/679/1/012053 ◽

2021 ◽

Vol 679 (1) ◽

pp. 012053

Author(s):

T Wijaya ◽

Agustono ◽

M A A Arif

Keyword(s):

Fish Oil ◽

Scylla Serrata ◽

Mud Crab ◽

Epa And Dha

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Maturity and breeding of the mud crab,Scylla serrata (Forskal) (Decapoda: Brachyura: Portunidae)

Proceedings Animal Sciences ◽

10.1007/bf03179960 ◽

1989 ◽

Vol 98 (5) ◽

pp. 341-349 ◽

Cited By ~ 10

Author(s):

P N Prasad ◽

B Neelakantan

Keyword(s):

Scylla Serrata ◽

Mud Crab

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Morphology and organization of muscle fibres in the thoracic coxal muscle receptor organ and the associated promotor muscle, in a crayfish, Cherax destructor, and mud crab, Scylla serrata

Acta Zoologica ◽

10.1046/j.1463-6395.2001.00088.x ◽

2002 ◽

Vol 82 (3) ◽

pp. 251-260

Author(s):

Ann L. Parkinson ◽

Anthony J. Bakker ◽

Stewart I. Head

Keyword(s):

Scylla Serrata ◽

Muscle Fibres ◽

Mud Crab ◽

Muscle Receptor ◽

Cherax Destructor ◽

Receptor Organ

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Muddy waters: An assessment of the suitability of zygocardiac ossicles for direct age estimation in the Giant mud crab Scylla serrata

Limnology and Oceanography Methods ◽

10.1002/lom3.10291 ◽

2018 ◽

Vol 16 (12) ◽

pp. 895-905 ◽

Cited By ~ 3

Author(s):

David A. Crook ◽

Brendan J. Adair ◽

Mark A. Grubert ◽

Thor M. Saunders ◽

John R. Morrongiello ◽

...

Keyword(s):

Age Estimation ◽

Scylla Serrata ◽

Mud Crab

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Loxothylacus ihlei Boschma, (Rhizocephala) and its effects on the mud crab, Scylla serrata (Forskal), in northern Australia

Journal of Fish Diseases ◽

10.1111/j.1365-2761.1995.tb00331.x ◽

1995 ◽

Vol 18 (5) ◽

pp. 389-395 ◽

Cited By ~ 9

Author(s):

I. A. KNUCKEY ◽

P. J. F. DAVIE ◽

L. R. G. CANNON

Keyword(s):

Scylla Serrata ◽

Northern Australia ◽

Mud Crab

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Vertical movement of mud crab megalopae (Scylla serrata) in response to light: Doing it differently down under

Journal of Experimental Marine Biology and Ecology ◽

10.1016/j.jembe.2006.10.001 ◽

2007 ◽

Vol 341 (2) ◽

pp. 196-203 ◽

Cited By ~ 16

Author(s):

James A.C. Webley ◽

Rod M. Connolly

Keyword(s):

Vertical Movement ◽

Scylla Serrata ◽

Mud Crab

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POPULATION BIOLOGY OF MUD CRAB Scylla serrata - Forsskal, 1775 IN MANGROVE ECOSYSTEM OF SUBANG DISTRICT, WEST JAVA

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.28930/jitkt.v9i1.17928 ◽

2017 ◽

Vol 9 (1) ◽

pp. 173

Author(s):

Ayu Annisa Kumalah ◽

Yusli Wardiatno ◽

Isdradjad Setyobudiandi ◽

Achmad Fahrudin

Keyword(s):

Population Dynamics ◽

Size Distribution ◽

Population Biology ◽

Stock Assessment ◽

Mangrove Ecosystem ◽

Mature Female ◽

Scylla Serrata ◽

Mud Crab ◽

Growth Coefficient ◽

Exploitation Rate

The study of population biology of mud crab Scylla serrata is necessary to analyse the population dynamics, such as growth of crabs, size distribution, mortality and exploitation rates of S. serrata. Population biology data collection was carried out from March to June 2016 at estuary and silvofishery areas of three stations (Mayangan, Tanjung Tiga and Blanakan villages). Data were analyzed using analytical methods of FISAT-II (FAO-ICLARM Stock Assessment Toool II)instruments. The results showed the growth of S. serrata male in Subang distric was positive allometric and the female was negative allometric. Growth coefficient (K) ranged from 0.21 to 0.43 in the estuary and from 0.28 to 0.89 in silvofishery area. Exploitation rate in the silvofishery area has been above the maximum exploitation rate. The size distribution of S. serrata in Subang district has the highest frequency at class interval of 106-110 mm (male) and of 101-105 mm. The highest abundance of mature female crabs is in May.Keywords : population biology, Scylla serrata, Subang District

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