1
ABSTRACT.
Key words:
Comparación de la dinámica socioeconómica y el desempeño del mercado en las cadenas de
valor de la langosta y el camarón gigante de agua dulce en Sri Lanka
RESUMEN.
A comparison of socioeconomic dynamics and market performance in lobster
and giant freshwater prawn value chains in Sri Lanka
*
Ruwini Basnayake Achini De Silva
Marine and
Fishery Sciences
MAFIS
Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
Panulirus homarus
P. ornatus P. versicolor
P. longipes
P. polyphagus P. pen-
icillatus
P. polyphagus
Macrobra-
chium rosenbergii
M. rosenbergii
Palabras clave:
Basnayake and De Silva: Socioeconomic dynamics and market performance in lobster and giant freshwater prawn
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Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
Basnayake and De Silva: Socioeconomic dynamics and market performance in lobster and giant freshwater prawn
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Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
=β+β11+β+β+β+β+β
+β+ε
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β1
β=
ε=
The lobster value chain
Actor prole analysis
Input supplier
Fishermen
Collector.
×
Basnayake and De Silva: Socioeconomic dynamics and market performance in lobster and giant freshwater prawn
>
Hotels/restaurants/local traders
Exporter.
==
Value
chain
stages
Value
chain
activities
Fishermen/diver Collector
Hotels/
restaurants
Exporter
Supportive services: safety and quality, policies and regulations, research and development, export promotion
Financial flow
Informationflow
Product flow Input flow Common flow Export chainflow
Domestic
consumer
Foreign
consumer
Value
chain
actors
Supportive
services
Ofilling (N)
Fuel (N)
Boat repairing (N)
Diving equipment
supplies (N)
2Diving (N)
Temporary storage
(N)
Transportation (N)
Unloading (N)
Sorting (V)
Grading (V)
Weighing (V)
Storing in
controlled tanks
(N)
Buying (N)
Transportation (N)
Display (N)
Selling (N)
Buying (N)
Transportation-
cold chain (N)
Washing (V)
Cleaning (V)
Sorting (V)
Grading (V)
Weighing (V)
Packing (V)
Cooling (N)
Search attributes
(color, size,
freshness,
variety,
undamaged)
Marketing
attributes (price,
retailer
cleanliness,
information
provision,
traceability)
Input supplies Diving/
harvesting Storage Local market
trading Exporting Consumption
Live: $6-$50
Dead: $3-$6 Live: $10-$58
Dead: $4-$7
Live: $7-$52
Dead: $5
Live: $12-$59
Dead: $4-$8
Live: $50-$100
Dead: $10-$15
Live: $15-$60
Dead: $7-$10
Live: $100
Dead: $15-$20
Value
chain
flows
Seafood retail
shops
Input
supplier
Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
Consumers
The lobster value chain dynamics
Structure
The product ow.
The nancial ow
Basnayake and De Silva: Socioeconomic dynamics and market performance in lobster and giant freshwater prawn
The information ow
Governance
Fishermen/diver Collector
Hotels/
restaurants
Exporter Foreign
consumer
Input
supplier
Credit payment
Spot payment
Credit/spot payment
Strong information flow
Weak information flow
Power holder
Product flow
Domestic
consumer
Seafood retail
shops
Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
The GFP value chain
Actor prole analysis
Input suppliers.
Fishers
0
50
100
150
200
250
Who has the
highest
power on
market
decision?
Who has
the
highest
power on
price?
Who has the
highest
power on
handling
volume?
Who is
deciding on
time of
fishing?
on species store/handling/
No of respondents
Individual fishermen
Fisheries society
Government nstitutesI
Third party
Who is
deciding on
type?
Who is
deciding on
grading?
Basnayake and De Silva: Socioeconomic dynamics and market performance in lobster and giant freshwater prawn 11
>
Collector (middleman)
==
Value
chain
stages
Value
chain
activities
Fishermen
(men/women) Collector
Hotels/
restaurants
Supportive services: PL Breeding/safety and quality, policies and regulations, research and development, export promotion
Financial flow
Informationflow
Productflow Inputflow Common flow Export chain flow
Domestic
consumer
Foreign
consumer
Value
chain
actors
Supportive
services
PL stocking (N)
Net supplies (N)
Boat repairing (N)
Catching (N)
Temporary storage
(N)
Transportation (N)
Unloading (N)
Sorting (V)
Grading (V)
Weighing (V)
Transportation-
cold chain (N)
Buying (N)
Transportation (N)
Display (N)
Selling (N)
Buying (N)
Transportation-
cold chain (N)
Washing (V)
Cleaning (V)
Sorting (V)
Grading (V)
Weighing (V)
Packing (V)
Cooling (N)
Search attributes
(color, size,
freshness,
variety,
undamaged)
Marketing
attributes (price,
retailer
cleanliness,
information
provision,
traceability)
Input supplies Diving/
harvesting Storage Local market
trading Exporting Consumption
$3-$6
Dameged:
$1.5 -$3
$5-$8
Live: $7-$10
$6-$12
$20-$50
Dead: $7-$15
$50
Value
chain
flows
Seafood retail
shops
Input
supplier
Exporter
Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
Hotels/restaurants/local traders (middlemen)
Exporter
Consumer
<
The GFP value chain dynamics
Structure
The product ow
The nancial ow.
Basnayake and De Silva: Socioeconomic dynamics and market performance in lobster and giant freshwater prawn
The information ow
Governance
Fishermen/diver Collector
Hotels/
restaurants
Exporter Foreign
consumer
Input
supplier
Credit payment
Spot payment
Credit/spot payment
Strong information flow
Weak information flow
Power holder
Product flow
Domestic
consumer
Seafood retail
shops
Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
Market performance
0
50
100
150
200
250
300
350
400
450
500
Individual fishermen
Fisheries society
Government nstitutesI
Third party
No of respondents
Who has the
highest power on
market decision?
Who has the
highest power on
handling volume?
Who is deciding
on time of
fishing?
Who is deciding
on area of fishing
in the reservoir?
Who is deciding
on releasing GFP
and culturing?
Basnayake and De Silva: Socioeconomic dynamics and market performance in lobster and giant freshwater prawn
Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
Basnayake and De Silva: Socioeconomic dynamics and market performance in lobster and giant freshwater prawn
Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
=
Basnayake and De Silva: Socioeconomic dynamics and market performance in lobster and giant freshwater prawn
Author contributions
Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
.
Macrobrachium rosenbergii
Macrobrachium rosenbergii
Basnayake and De Silva: Socioeconomic dynamics and market performance in lobster and giant freshwater prawn
.
Macrobrachi-
um rosenbergii
Panulirus
homarus
Panulirus homarus
Macrobrachium rosenber-
gii
Macrobrachium rosen-
bergii
Marine and Fishery Sciences 38 (4): xxx-xxx (2025)
Macro-
brachium rosenbergii
