Upali S. Amarasinghe

Upali S. Amarasinghe
University of Kelaniya · Department of Zoology and Environmental Management

B.Sc., M.Sc., Ph.D., D.Sc. (Bangor) D.Sc. (h.c.)
Current research: Culture-based fishery for finfish and giant freshwater prawn in Sri Lankan reservoirs

About

276
Publications
80,020
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2,262
Citations
Citations since 2016
55 Research Items
939 Citations
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2016201720182019202020212022050100150
Introduction
Current research: Improved productivity, efficiency and sustainability of the culture-based fishery for finfish and giant freshwater prawn in Sri Lankan reservoirs. The project aims to introduce a robust, science-based management regime for the culture-based fishery of Macrobrachium rosenbergii and finfish species in Sri Lankan reservoirs, and improve facets of the supply chain that will ensure long term sustainability, improve productivity, profitability, livelihoods and incomes of fishers..
Additional affiliations
January 2007 - May 2007
Netherlands Institute of Ecology (NIOO-KNAW)
Position
  • Academic Visitor
January 2002 - present
Position
  • Culture-based fisheries
January 2002 - present
Position
  • Culture-based fisheries
Education
July 2010 - July 2010
Bangor University
Field of study
  • Tropical Artisanal Fisheries
July 2010 - July 2010
Bangor University
Field of study
  • Tropical Artisanal Fisheries
June 1986 - January 1991
University of Ruhuna
Field of study
  • Inland Fisheries

Publications

Publications (276)
Article
Aquaculture is seen as an alternative to meeting the widening gap in global rising demand and decreasing supply for aquatic food products. Asia, the epicenter of the global aquaculture industry, accounts for over 90% of the global aquaculture production quantity and about 80% of the value. Asian aquaculture, as with global aquaculture, is dependent...
Article
As in most artisanal fisheries, assessment of fishing effort is crucial to the management of the artisanal fishery of Parakrama Samudra, an ancient man-made tropical lake in Sri Lanka. Since there were few similarities between alternative ways of expressing effort for the gill-net cichlid fishery is the lake, this study aimed to find the most effec...
Article
The conference ‘Fish Stock Assessment Methods for Lakes and Reservoirs: Towards the True Picture of Fish Stock’ (FSAMLR) was held in September 2007 in Ceske Budejovice, Czech Republic. A total of 110 participants from 34 countries attended the meeting and 93 lectures were presented. Great advances were reported in fish surveys using hydroacoustics...
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There is a growing recognition of the need to conserve biodiversity that has been conceptualised in the Convention of Biological Diversity. Maintenance of fish species richness is particularly important, because habitat degradation in inland waters continues to accelerate on a global scale. Here we develop empirical models for predicting fish speci...
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A collaborative international project funded by the European Union's INCO-DC programme is undertaking limnological, fish biological, environmental and socio-economic research in five tropical lakes and reservoirs in Sri Lanka, Thailand and the Philippines over the period 1998–2001. The aim is to determine their trophic structure and their capacity...
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Globally, inland fisheries make a significant contribution to sustainable development across dimensions of food security, livelihoods, economic value and biodiversity. Nevertheless, aquaculture is generally considered to be environmentally unfriendly. As such, environmentally friendly approaches of increasing fish production such as fisheries enhan...
Article
Even though small-scale fisheries throughout the globe are based on local ecological knowledge (LEK), it is often not involved in the decision-making process. An attempt is made to review the potential of using LEK of traditional coastal fisher communities in Sri Lanka and self-governing institutions in managing fisheries commons sustainably. Fishe...
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Abstract In the fisheries sector, fisheries enhancement through culture-based fisheries (CBF) has been recognized as an environmentally friendly approach, which is bound to contribute to increasing food fish production, especially in developing countries. Through concerted efforts, Sri Lanka achieved considerable success in CBF development in small...
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Abstract In this study, the variation of aquatic molluscan diversity concerning seasonal water level fluctuations (WLF) and sediment texture was investigated in some perennial irrigation reservoirs and the associated head headwater streams in the Kala Oya river basin in Sri Lanka. Altogether 11,752 molluscan specimens belonging to 10 gastropod taxa...
Article
Water-level fluctuations are reported to be key processes influencing ecosystem structure and functions in lentic aquatic ecosystems such as reservoirs. The plankton community structure in reservoirs, being useful monitoring tools as reservoir trophic status indicators, are influenced by water quality parameters and water-level fluctuations. The pr...
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Seasonal water-level fluctuations (WLFs) in reservoirs influence ecological processes, in turn affecting their benthic macroinvertebrate communities. The present study was carried out in 10 irrigation reservoirs of Sri Lanka to investigate the effects of seasonal WLFs on the benthic macroinvertebrate fauna. The study period was divided into two dis...
Article
Seasonal water-level fluctuations (WLFs) in reservoirs influence ecological processes, in turn affecting their benthic macroinvertebrate communities. The present study was carried out in 10 irrigation reservoirs of Sri Lanka to investigate the effects of seasonal WLFs on the benthic macroinvertebrate fauna. The study period was divided into two dis...
Article
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Fish generally mature of a smaller fraction of their maximum sizes than birds and mammals. In farmed tilapia (Family Cichlidae), which can tolerate very adverse conditions, the stunting caused by these conditions also cause them to spawn at very small sizes. Such spawning at small sizes (or 'early spawning') is usually perceived as a unique feature...
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Culture‐based fisheries (CBF) are increasingly accepted as strategies for enhancing inland fisheries, especially in tropical Asia. In Sri Lanka, CBF development in irrigation reservoirs has gained momentum due to concerted efforts of government fisheries authorities for inland fisheries enhancement. In the present study, production trends of five i...
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As in many tropical countries, reservoir fishery of Sri Lanka is dominated by the exotic cichlid, Oreochromis niloticus (Linnaeus, 1758). Oreochromis niloticus populations in irrigation reservoirs are expected to be under the influence of various disturbances such as changes in hydrological regimes, trophic conditions and fishing pressure. In the p...
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Abstract In Sri Lankan reservoirs, small, indigenous fish species (SIS) are abundant and can be differentially exploited using small mesh (15-38 mm stretched mesh sizes) gillnets without any detrimental effects on the cichlid fisheries. However, in the recent past a paradigm shift in the reservoir fisheries of Sri Lanka is observed from total depen...
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Many of the seasonal water bodies in Sri Lanka harbour substantial numbers of aquatic birds. Local aggregation of water fowl during communal roosting and colonial breeding results in substantial inputs of nutrients into aquatic systems and can alter fresh water aquatic systems. The present study calculated the density and species richness of true a...
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Institutional Robustness of Culture- based Fisheries in Perennial Reservoirs of Sri Lanka K.B.C. PUSHPALATHA1, MOHOTTALA G. KULARATNE2, U.S. AMARASINGHE3,* 1National Aquaculture Development Authority of Sri Lanka, 41/1, Parliament Road, Pelawatta, Battaramulla, Colombo, Sri Lanka 2Department of Economics, University of Kelaniya, Kelaniya, Sri La...
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We were profoundly saddened to learn the demise of Professor Sena S. De Silva who passed away in Melbourne, Australia, on 6 May, 2020. Sena was respected and admired for his enduring commitment and outstanding contributions to the fisheries and aquaculture sector. His profound enthusiasm and dedication over the last 40 years merited him with a repu...
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Ehirava fluviatilis is a marine origin clupeid found in Southern India and Sri Lanka, also found in two freshwater lakes, namely Parakarama Samudraya and Rajanaganaya reservoir, and that places are identified as secondarily colonizedhabitats. The objectives of this study were carried toinvestigate the fatty acid (FA) profile in the flesh of E.fluvi...
Article
Many reservoirs provide multiple benefits to people around the world, in addition to primary uses such as irrigation. Thus, reservoir management should address their multiple uses. The water quality of ten irrigation reservoirs in Sri Lanka was examined in the present study with the objective of better understanding the effects of hydrological regi...
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Most tropical rivers especially in the Asian region, are severely impacted by various human perturbations, and the diverse habitats in streams support rich invertebrate and vertebrate communities. It is hypothesized that the fish assemblages and their dietary structure in two tropical streams differ because they flow through different terrains and...
Article
Importance of participatory approaches in the management of small-scale fisheries is being increasingly highlighted today throughout the world. Brush park fishery in Negombo estuary, Sri Lanka is a small-scale fishery where traditional ecological knowledge (TEK) accumulated over generations is utilized to optimize the harvests. In the present study...
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As fisheries production in reservoirs of most countries is a secondary use, challenges for improved management of fisheries should be addressed by building partnership between fisheries and other interested groups such as agriculture concerned with water management. Attempts were therefore made to develop empirical fish yield predictive models in t...
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Background: Comprehensive understanding of risk factors related to socio-economic and demographic status and knowledge, attitudes and practices (KAP) of local communities play a key role in the design and implementation of community-based vector management programmes, along with the identification of gaps in existing control activities. Methods:...
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The reproductive biological characteristics of Oreochromis niloticus (Linnaeus 1758) were investigated in relation to fishing pressure and water level fluctuation in 10 irrigation reservoirs of Sri Lanka. It was found that matured larger sized male fish made larger and deeper nests. The negative relationship between gonado-somatic index (GSI) and s...
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Life history information on six endemic fish species namely Belontia signata, Pethiya cumingii, P. nigrofasciata, Puntius titteya, Rasboroides vaterifloris and Garra ceylonensis inhabiting the Kalu Ganga and Kelani Ganga river basins in Sri Lanka was evaluated. The growth constant of the fish species showed a positive relationship with the river or...
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Background Socio-economic, demographic factors and Knowledge Attitude Practices (KAPs) have been recognized as critical factors that influence the incidence and transmission of dengue epidemics. However, studies that characterize above features of a risk free or low risk population are rare. Therefore, the present study was conducted to characteriz...
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The nesting sites of Oreochromis niloticus (Linnaeus 1758) were studied in 10 irrigation reservoirs of Sri Lanka from April 2014 to April 2016 to understand the influencing factors. The optimal nesting depth and nest diameter varied across reservoirs. Nest density (ND) was negatively related to slope of the littoral area (in degrees) according to N...
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Brush park fishery in Negombo estuary, Sri Lanka is a traditional fishing practice which relies on fishes attracted to artificial woody fish aggregation devices. This study investigates whether constituent species in these brush parks exhibit morphological variations in relation to their dietary habits. Fishes caught in brush parks were sampled fro...
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Background. Gillnets of mesh sizes (6.9 to 12.7 cm) are used in individual boats in Sri Lankan reservoirs targeting exotic cichlid species, Oreochromis mossambicus (Peters, 1852) and Oreochromis niloticus (Linnaeus, 1758), which dominate the fisheries. The mesh composition of gillnets varies from boat to boat and from season to season making catch...
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The benthic macroinvertebrate fauna and main abiotic parameters were studied to understand the patterns of diversity and structure along the temporal and longitudinal gradients in two tropical lotic ecosystems in the wet and dry zones of Sri Lanka. Invertebrate abundance (annual means) was in the same magnitude in the two streams (2,520 ind. m⁻² in...
Article
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As in many tropical reservoir fisheries, the major fishing gear in the reservoirs of Sri Lanka is gillnet. Gillnets of a wide range of stretched mesh sizes (6.9 - 11.4 cm) are used in individual boats in Sri Lankan reservoirs targeting mainly two exotic cichlid species, Oreochromis mossambicus and O. niloticus, which dominate the fisheries accounti...
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Discharge-mediated seasonal patterns of food web interactions were investigated in two streams in Sri Lanka; Eswathu Oya (a perennial wet-zone stream) and Yan Oya (a seasonal dry-zone stream). Based on volumetric proportions of diet composition, relative abundance of fish species and their daily food rations, the mean cumulative consumption of each...
Article
Full-text available
As in many tropical reservoir fisheries, the major fishing gear in the reservoirs of Sri Lanka is gillnet. Gillnets of a wide range of stretched mesh sizes (6.9-11.4 cm) are used in individual boats in Sri Lankan reservoirs targeting mainly two exotic cichlid species, Oreochromis mossambicus and O. niloticus, which dominate the fisheries accounting...
Article
As in many developing countries, small-scale fisheries including beach seining contribute significantly livelihoods and food security of coastal communities. Beach seining in Sri Lanka is seasonal mainly during calm season deprived of strong monsoonal winds, and essentially a multi-species fishery. Knowledge about the seasonal occurrence of pelagic...
Article
Many fisheries authorities in the world have been compelled to accept community-based management as an invaluable means to formulate fisheries management due to failures of small-scale fisheries exclusively managed by centralized units. Beach seine fishing practices in Sri Lanka are known to be institutionalized by traditional community-based coast...
Article
An extra 30–40 million tonnes of food fish will be required by 2050 to meet the increasing need for a growing population. In the wake of plateauing of the traditional food fish supplies from marine capture fisheries, the gap in the supplies will have to be met from aquaculture and other plausible strategies, including increased inland fish producti...
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Most of the fish stocks in the world, including European fish stocks, are threatened by overfishing and/or degraded environmental conditions. Although the Common Fisheries Policy (CFP) is the main policy instrument managing fish stocks in Europe, there is continued concern as to whether commercial fish stocks will achieve Good Environmental Status...
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Local knowledge of fishers is considered to be useful in establishing effective dialogue between fishers and fishery managers to foster the sharing of power and responsibility between the government and local resource users. However, fishers' local knowledge is often considered anecdotal and consequently, these knowledge bases are largely underutil...
Article
Full-text available
Local knowledge of fishers is considered to be useful in establishing effective dialogue between fishers and fishery managers to foster the sharing of power and responsibility between the government and local resource users. However, fishers' local knowledge is often considered anecdotal and consequently, these knowledge bases are largely underutil...
Article
In Sri Lanka, small non-perennial reservoirs (mostly < 50 ha) are numerous in the dry zone receiving less than 185 cm annual precipitation. These are irrigational and are not traditionally used for inland fisheries, due to inadequate natural recruitment, but has the potential for utilization for the development of culture-based fisheries (CBF), a f...
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Stilt fishing is a unique fish catching method confined only to southern coast of Sri Lanka from Galle to Matara. Stilt fishermen sitting on a cross bar called “Petta” tied to vertical pole planted in the reef and carrying out rod and line fishing are a Sri Lankan icon that attracts local and foreign tourists’ attention. This small-scale, seasonal...
Article
Most small-scale fisheries throughout the world are based primarily on fisher knowledge, which is essentially experiential knowledge consisting of a replicable, verbally transmitted set of skills. Even though fisher knowledge is well documented for some fisheries, there are only a few studies that explain how it actually works as a management syste...
Conference Paper
Full-text available
Seasonal water level fluctuation, habitat alteration and colonization of marginal benthic fauna in irrigation reservoirs in the Kala Oya River basin in Sri Lanka. Sampath N. Weerakoon1, Withanage.U.Chandrasekara, Upali.S.Amarasinghe Department of Zoology & Environmental Management, University of Kelaniya, Sri Lanka. 1 Corresponding Author: sn...
Conference Paper
Full-text available
Small scale coastal fisheries accounts for nearly 40% of world fish catches and provide direct employment for more than 90% of the world fishers employed in capture fisheries. Subsequent recognition of the failures of centralized fisheries management led the governments to accept community-based management as an invaluable means to formulate fisher...
Article
Mass aggregation of waterfowls for breeding, results in allochthonous nutrient inputs into aquatic systems. This study evaluated accumulation of bird droppings as allochthonus nutrient input and its fluctuations in Anavilundawa International Ramsar Sanctuary in Sri Lanka where Asian openbill (Anastomus oscitans) mass breeding occurs annually. Reser...
Chapter
In tropical Asia, there is a general paucity of natural lakes that are mainly located in the island states of the Philippines and Indonesia. Reservoir construction is extensive in the region primarily for irrigation, flood control and hydroelectricity generation, and fish production is essentially a secondary use of these reservoirs. Although the d...