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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 Absar Alam, N. K. Chadha, K. D. Joshi, S. K. Chakraborty, Paramita Banerjee Sawant, Tarkeshwar Kumar, Kalpana Srivastava, S. C. S. Das, A. P. Sharma
 
Subject Invasive, Nile tilapia, 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 majority of the food items ingested consisted of Chlorophyceae, Myxophyceae, Bacillariophyceae and detritus. Among the diatoms—Synedra spp. (80.75 %), Melosira spp. (73.5 %), Cyclotella spp. (73 %), Meridion spp. (71.75 %) and Nitzchia spp. (73.25 %), the green algae—Ankistrodesmus spp. (71.00 %), Coelastrum spp. (61.5 %), Scenedesmus spp.(52 %), Tribonema spp. (49.5 %), Protococcus spp. (58.5 %), Oocystis spp. (49.75 %) and Pediastrum spp. (49.5 %) and among blue green 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 throughout 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 indicted 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.
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Date 2021-08-07T10:33:17Z
2021-08-07T10:33:17Z
2014-07-04
 
Type Research Paper
 
Identifier Alam, A., Chadha, N. K., Joshi, K. D., Chakraborty, S. K., Sawant, P. B., Kumar, T., Srivastava, K., Das, S. C. S. and Sharma, A. P. (2015) Food and Feeding Ecology of the Non-native Nile Tilapia Oreochromis niloticus (Linnaeus, 1758) in the River Yamuna, India. Proceedings of National Academy of Sciences, India Section. B Biological Sciences, 85(1): 167-174. DOI 10.1007/s40011-014-0338-3.
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http://krishi.icar.gov.in/jspui/handle/123456789/53593
 
Language English
 
Relation Not Available;
 
Publisher Springer