Diet composition of freshwater crab, Potamon koolooense Rathbun, 1904 from hillstream of Uttarakhand
The present study was carried out to study the diet composition of freshwater crab, P. koolooense in hillstream Khoh of Uttarakhand during November, 2013 to October, 2014. Total 105 crab samples were used for the study, 35 male and 47 female were found with food in their stomach while rest of the 23 had empty stomachs. The carapace length (CL) ranged from 12mm to 49mm, carapace width (CW) from 15mm to 59mm and total weight (TW) from 2.08g to 60.12g. Stomach content analysis of the animal showed that the diet of the animal composed of animal matter, plant matter, algae, fungi, debris and unidentified materials. Animal matter ranged from (3.27-11.93%), plant matter (4.37-14.44%), algae (1.73-6.15%), fungi (0.17-1.43%), debris (28.18-40.47%) and unidentified materials (36.46-50.05%) in males while in the female animal matter ranged from (3.09-12.34%), plant matter (4.45-12.73%), algae (1.03-7.61%), fungi (0.02-3.34%), debris (23.18-43.34%) and unidentified (30.31-51.04%). Unidentified materials recorded maximum and fungi recorded minimum in both the sexes of Potamon koolooense. A significant difference was observed at p<0.05 between food groups- algae and unidentified matter in both sexes. This is the first report, to key out and quantifies the dietary items and feeding habits of crab in Uttarakhand which would be helpful in interpreting the ecological niche of the animal in mountain stream communities.
Diet components, Freshwater crab, Hillstream, Khoh, Uttarakhand
Bryceson, I. and Massinga, A. (2002). Coastal resources and management systems influenced by conflict and migration. Mecufi Mozambique. Ambio, 31: 512-517.
Chande, A.I. and Mgaya, Y.D. (2004). Food habits of blue swimming crab Portunus pelagicus, along the coast of Dar es Salaam. WIOJMS, 3 (1): 37-42.
Chatterjee, S. (2014). Feeding behaviour and functional role of some selected species of brachyuran crabs in nutrient cycle at coastal belt of Midnapore (East), West Bengal, India. JBLS, 5(1):106-129.
Devi, P.L., Nair, D.G. and Joseph, A. (2013). Habitat ecology and food and feeding of the herring bow crab, Varuna litterata (Fabricius, 1798) of Cochin backwaters Kerala India. Arthropods, 2(4): 172-188.
Josileen, J. (2011). Food and feeding of the blue swimmer crab, Portunus pelagicus (Linnaeus, 1758) (Decapoda, Brachyura) along the coast of Mandapam, Tamil Nadu, India. Crustaceana, 84 (10): 1169-1180.
Kobayashi, S. (2012). Dietary preference of the potamid crab Geothelphusa dehaani in a mountain stream in Fukuoka, northern Kyushu, Japan. J. Plankton. Res., 3: 36-401.
Mohapatra, A., Mohanty, R.K., Bhatta, K.S., Mohanty, S.K. ( 2005). Food and feeding habits of the mud crab Scylla serrata (Forskal) from Chilika Lagoon. J. Inland Fish. Soc. India, 37 (2), 1-7.
Needham, P.R. and Needham, J.G. (1962). A guide to the study of freshwater biology. 5' Ed. Holden Day Inc. p.108.
Patel, N.M., Chhaya, N.D. and Bhaskaran, M. (1979). Stomach contents of Portunus pelagicus (L.) from AD net catches. Indian J. Mar. Sci., 8: 48–49.
Varadharajan, D. and Pushparajan, N. (2012). Studies on peculiar observations of the food and feeding habits of Painted Pebble crab Leucosia anatum, Southeast coast of India. Int. J. Pharm. Biol. Sci. Arch., 3(5):1170-1173.
Vinagre, A.S., Nunes do Amaral, A.P., Ribarcki, F.P., Fraga da Silveira, E. and Perico, E. (2007). Seasonal variation of energy metabolism in ghost crab O. quadrata at Siriu Beach (Brazil). Com. Biochem. Physiol., 146: 514-519.
Viswanathan, C. and Raffi, S.M. (2015). The natural diet of the mud crab Scylla olivacea (Herbst, 1896) in Pichavaram mangroves, India. Saudi J. Biol. Sci., (Article in press)
Ward H.B. and Whipple, G.C. 1959. Freshwater Biology 2nd Edition, John Wiley and Sons. New York, U.S.A.
Williner, V. and Collins P.A. (2013). Feeding ecology of the freshwater crab Trichodactylus borellianus (Decapoda: Trichodactylidae) in the floodplain of the Paraná River, southern South America. Lat. Am. J. Aquat. Res., 41: 781–792.
Yeo, D.J.C., Ng, P.K.L., Cumberlidge, N., Magalhães, C., Daniels, S.R. and Campos, M.R. (2008). Global diversity of crabs (Crustacea: Decapoda: Brachyura) in freshwater. Hydrobiologia, 595: 275-286.
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)