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
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Subject |
Invasive, Nile tilapia, Gastrosomatic Index, Condition factor, Food, Yamuna
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Description |
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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. Not Available |
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Date |
2021-08-07T10:33:17Z
2021-08-07T10:33:17Z 2014-07-04 |
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Type |
Research Paper
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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.
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/53593 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Springer
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