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Food and feeding ecology of the non-native Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) in the river Yamuna, India

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Title Food and feeding ecology of the non-native Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) in the river Yamuna, India
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Creator Alam A.
Chadha NK.
Joshi KD.
Chakraborty SK.
Banerjee Sawant P.
Kumar T.
Srivastava K.
Das SCS.
Sharma A.P.
 
Subject Invasive, Nile Telapia, Gastrosomatic Index, Condition factor, Food, Yamuna
 
Description Not Available
Nile tilapia Oreochromis niloticus is the dominant invasive species of the river Yamuna. Gut analysis showed that the major of the food items ingested consisted of Chlorophyceae, Myxophyceae, Bacillariophyceae and detritus. Among the diatoms - Synedra spp. (80.75%), Melsira spp. (73.5%), Cyclotella spp. (73%), the green algae - Ankistrodesmus spp. (71.00%), Coelastrum spp. (61.5%), Scenedesmus app. (71.00%), Tribonema spp. (49.75%) and Pediastrum spp. (58.5%) and among the blue algae, Oscillatoria spp. (70.5%), Anacystis spp. (61.5%) and Phormidium spp. (46.5%) showed high frequency of occurrence. The Gastrosomatic Index in males and females ranged from 0.23 to 0.93 and 0.25 to 1.1 respectively with no significant difference between males and females through the year (t test, p>0.05). In addition to this, higher percentage of males and females showing low feeding intensity during all the months except in January indicated the species to be the poor feeder. However, the condition factor >1 suggested the species to be in good condition throughout the year in both males and females. Dominancy of detritus and pollution indicator genera Synedra spp., Anacyctis spp., Ankistrodesmus spp., Melosira spp., Nitzchia spp., Oscillatoria spp., Phormidium spp. and Scenedesmus spp., suggested Nile tilapia to be the cleaner of the polluted river Yamuna.
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Date 2018-12-17T11:13:42Z
2018-12-17T11:13:42Z
2014-04
 
Type Research Paper
 
Identifier Alam A., Chadha NK., Joshi KD., Chakraborty SK., Banerjee Sawant P., Kumar T., Srivastava K., Das SCS., and Sharma A.P. (2014). Food and feeding ecology of the non-native Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) in the river Yamuna, India. Proc. Natl. Acad. Sci., India Sect. B Biol. Sci. DOI 10.1007/s40011-014-0338-3.
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http://krishi.icar.gov.in/jspui/handle/123456789/16042
 
Language English
 
Relation Not Available;
 
Publisher Springer