Ecological and modelling approach to flood-fish relationships in the Mekong River Basin Cambodia

Baran E., . and Cain J., . (2003) Ecological and modelling approach to flood-fish relationships in the Mekong River Basin Cambodia. [Proceedings Paper]

In tropical flood plain systems and rivers how to address the relationships between environmental modification due to development dams construction extracting water etc. and natural fish production Environmental modelling is a promising tool provided that the frequent paucity of data can be circumvented. We present here the three parts of an approach that has been developed in 2000-2001 in the Mekong River Basin: 1- Study of all ecological parameters involved in the prediction of fishery harvest. Looking beyond hydrology and encompassing subtle ecological factors such as the nature of flooded vegetation has proven essential to a comprehensive assessment of the driving factors in fish production. 2- Identification of the corresponding data required for classical modelling. The requirements of such modelling are highlighted and the drawbacks arise mostly from a lack of such data in tropical regions. 3- Development of a Bayesian network to model the functioning of the system in which fish groups and environmental factors are considered as interacting agents of a system. Interactions between agents are thus specified in terms of probability distrubutions. The latter approach or more broadly multi-agent modelling is promising as the interactions between multiple groups can be easily made more complex to better mimic reality. Thus the model of fish-flood plains relationships can be extended to include users groups fishers peasants etc. and environment managers interacting national bodies.

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Abstract

In tropical flood plain systems and rivers how to address the relationships between environmental modification due to development dams construction extracting water etc. and natural fish production Environmental modelling is a promising tool provided that the frequent paucity of data can be circumvented. We present here the three parts of an approach that has been developed in 2000-2001 in the Mekong River Basin: 1- Study of all ecological parameters involved in the prediction of fishery harvest. Looking beyond hydrology and encompassing subtle ecological factors such as the nature of flooded vegetation has proven essential to a comprehensive assessment of the driving factors in fish production. 2- Identification of the corresponding data required for classical modelling. The requirements of such modelling are highlighted and the drawbacks arise mostly from a lack of such data in tropical regions. 3- Development of a Bayesian network to model the functioning of the system in which fish groups and environmental factors are considered as interacting agents of a system. Interactions between agents are thus specified in terms of probability distrubutions. The latter approach or more broadly multi-agent modelling is promising as the interactions between multiple groups can be easily made more complex to better mimic reality. Thus the model of fish-flood plains relationships can be extended to include users groups fishers peasants etc. and environment managers interacting national bodies.

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Item Type:	Proceedings Paper
AGROVOC Term:	FISHERY PRODUCTION
AGROVOC Term:	FISHERY DATA
AGROVOC Term:	ENVIRONMENTAL FACTORS
AGROVOC Term:	FISHES
AGROVOC Term:	FLOODING
AGROVOC Term:	MODELS
AGROVOC Term:	FISHERIES
AGROVOC Term:	ANIMAL MIGRATION
AGROVOC Term:	CAMBODIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:27
URI:	http://webagris.upm.edu.my/id/eprint/16060

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