Modelling of energy transformations in fertilized tropical fish ponds

The energy budget patterns of three tropical ecosystems in which the polyculture of fish was practised were studied. The rates of organic production of the three tropical ponds over two annual cycles were evaluated. Study of the utilization of energy in the three ponds, which were fertilized with ve...

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Bibliographic Details
Published in:Lakes & Reservoirs : Science, Policy and Management for Sustainable Use Policy and Management for Sustainable Use, 2007-12, Vol.12 (4), p.295-301
Main Authors: Chakrabarty, Debajyoti, Das, Sanjib Kumar, Das, Mrinal Kanti
Format: Article
Language:English
Subjects:
Diammonium phosphate
energy transformation
polyculture
standing crop
tropical pond
vermicompost
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Summary:The energy budget patterns of three tropical ecosystems in which the polyculture of fish was practised were studied. The rates of organic production of the three tropical ponds over two annual cycles were evaluated. Study of the utilization of energy in the three ponds, which were fertilized with vermicompost, cow dung and diammonium phosphate, revealed that herbivores were more efficient in utilizing energy than were autotrophs. The available energy in these systems was supplied by autochthonous sources. Silver carp was found to be the most efficient organism in converting energy in the grazer food chain in the ponds. The efficiency of the system in regard to fish production was 0.052, 0.049, and 0.051%, respectively, of the total available solar radiation. Organisms in various trophic levels were all characterized by energy changes in the studied ponds, forming the food webs contained in them.
ISSN:1320-5331
1440-1770
DOI:10.1111/j.1440-1770.2007.00338.x