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Impact of walking catfish Clarius batrachus on growth and production characteristics of water chestnut (Trapa bispinosa) and water hyacinth (Eichhornia crassipes) in a waterlogged ecosystem

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Title Impact of walking catfish Clarius batrachus on growth and production characteristics of water chestnut (Trapa bispinosa) and water hyacinth (Eichhornia crassipes) in a waterlogged ecosystem
Not Available
 
Creator Roy Chowdhury, S., Mohanty, R.K., Brahmanand, P.S. and Kumar, A.
 
Subject aquatic science, plant science,agricultural & Biological science
 
Description Not Available
In an integrated aquaculture and aquatic crop cultivation system, comparative growth
analysis of aquatic crop, water chestnut (Trapa bispinosa Roxb.) and waterhyacinth
[Eichhornia crassipes (Mart.) Solmes], a weed in waterlogged areas, was carried out to
understand the extent of interference of waterhyacinth on growth and fruit yield of water
chestnut and associated yield of fish. Growth of water chestnut was faster during the first
2 months after planting, and thereafter the growth rate of waterhyacinth was faster and
suppressed growth of water chestnut. Fast-growing waterhyacinth restricted leaf area
development and affected crop growth rate of water chestnut. Flowering frequency of the
water chestnut plants, which had an influence on fruit initiation and yield, was also
severely reduced in the presence of waterhyacinth vegetation. Fruits were smaller, with
pale- colored peels. The coexistence of waterhyacinth caused 93% decrease in the yield
of water chestnut from 3.96 t ha-1 to 0.25 t ha-1
. Survival rate of walking catfish [Clarias
batrachus (Magur)] was highest (68%) in plots with water chestnut followed by
waterhyacinth-infested plots (44%). The highest fish yield (1.8 t ha-1
) with higher mean
body weight (360 g) was noted in plots with water chestnut compared to fish yield of
0.79 t ha-1
, with average mean body weight of 224.5 g in plots with both water chestnut
and waterhyacinth. Gut contents analysis showed 25 to 30% natural food from the
ambient ecosystem when fish was reared with water chestnut. Infestation of
waterhyacinth not only suppressed growth and yield of water chestnut, but also
significantly reduced the growth and yield of fish, probably due to competition for space
and nutrients, very low primary productivity, and low-intensity light penetration.
However, walking catfish and water chestnut could be grown together, as fish with water
chestnut recorded the highest production size index (648), performance index (194.9),
and apparent feed conversion ratio (1.39). Therefore, a fish รพ water chestnut system
provided better aquatic environment than a fish + water- hyacinth system, and a reduction
of supplemental fish feed of 25 to 30% by this fish + water chestnut coproduction system
increases productivity of the system.
Not Available
 
Date 2018-12-01T08:56:28Z
2018-12-01T08:56:28Z
2015-02
 
Type Research Paper
 
Identifier Roy Chowdhury, S., Mohanty, R.K., Brahmanand, P.S. and Kumar, A. 2015. Impact of walking catfish Clarius batrachus on growth and production characteristics of water chestnut (Trapa bispinosa) and water hyacinth (Eichhornia crassipes) in a waterlogged ecosystem. Journal of Aquatic Plant Management (USA) 53:113-120
0146-6623
http://krishi.icar.gov.in/jspui/handle/123456789/14879
 
Language English
 
Relation Not Available;
 
Publisher The Aquatic Plant Management Society