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Wetland ecosystem-a study on fish-aquatic food crops diversity for enhancing productivity and economic stability for fish-farm families in Indian subtropics

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  • An intensive case study was undertaken at the farm fisheries from during wet months under NAZ of Indian subtropics for characterization and integrated utilization of Tal wetland ecosystem through pisciculture [Live (magur - Clarias batrachus & singi - Heteropneustes fossilis) and sweet water fishes (rohu - Labeo rohita & Katla - Katla katla) both category in 1:1 ratio] along with protein and starch-rich 2 aquatic food crops (Trapa bispinosa & Euryale ferox) as sole and mixed stand, being to be more productive for rural farm families. Results from the study, fish-crop diversity was much important and substantial enough for more production. For easy comparison among variables, yield of fishes and crops were converted to makhana yield equivalent (MYE) due to heterogeneous characteristics. Sole yield of all fishes (0.59, 0.54, 1.18 and 1.32 t ha⁻¹) and water chestnut and makhana (8.39 & 2.36 t ha⁻¹) dominated individually in respect to their associated yield. However in MYE study, among other combinations, superior results obtained with L-fishes (1.90 & 1.35 t ha⁻¹) + makhana (1.72) in respects to their cumulative yield (4.97 t ha⁻¹) followed L-fishes (2.05 +1.19 t ha⁻¹) and water chestnut (1.28 t ha⁻¹) due to their compatibility with the system. Regarding economic outcome, GMR, NP and B-C ratio (US$ 3244 & 2557 ha-1 and 3.71) were also very promising with the system, which economically viable particularly for rural farm families. Among the combined system, lowest values obtained with SW-fishes + makhana, due to their non-compatibility characteristics. From the study it concluded that it is thus imperative to utilize this vast unused wetland ecosystem in the regions with impetuously for food, livelihood, engagement of household labours and ultimately economic stability that are inextricably linked with rural sustainability as well.
  • Keywords: Fisheries Economics, aquatic food crops, aquatic ecosystem, live and sweet water fishes, Aquaculture Economics and Management, productivity and economic stability
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  • Puste, Anandamoy, Pranab Kumar Sarkar, Dilip Kumar Das. 2004. Wetland ecosystem-a study on fish-aquatic food crops diversity for enhancing productivity and economic stability for fish-farm families in Indian subtropics. Peer Review: No. In: Proceedings of the Twelfth Biennial Conference of the International Institute of Fisheries Economics & Trade, July 20-30, 2004, Tokyo, Japan: What are Responsible Fisheries? Compiled by Ann L. Shriver. International Institute of Fisheries Economics & Trade, Corvallis, Oregon, USA, 2004. CD ROM. ISBN 0-9763432-0-7
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