caa a22 4500 60622663X CHVBK 20210128101154.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10641-014-0255-6 doi (NATIONALLICENCE)springer-10.1007/s10641-014-0255-6 Characterizing trophic interactions of a catfish dominated tropical reservoir ecosystem to assess the effects of management practices [Elektronische Daten] [Preetha Panikkar, M. Khan, V. Desai, N. Shrivastava, A. Sharma] The trophic interactions and energy flows of a tropical reservoir was carried out to assess the effect of stocking carps as a management strategy on the food web of the reservoir ecosystem using mass balance modelling. The model structured around 13 ecological groups which included the most dominant catfishes Mystus spp. The trophic level of the reservoir varied between 3.63 and 1.0, with the largest values corresponding to aquatic birds, and the carnivorous fishes (other catfishes, Mystus spp and snake-heads) acting as top predators upon system resources at lower trophic levels. The ecotrophic efficiency was highest for the planktivorous fishes (major carps, minor carps and minnows) whereas low values were recorded for the most dominant fish group, the catfishes. The mixed trophic impact routine shows that the, Mystus spp. have a strong negative impact on minor carps and minnows but the other catfishes (Wallago attu and Ompok bimaculatus) have a slight positive impact on the major carps (the stocked fishes). The snakeheads (Channa marulius and Channa punctatus) exert negative impact on their preferred prey, major carps. The reservoir has a detritus based food chain, where almost all the biomass is concentrated in the first two trophic levels (the producers level and the herbivore/detritivore level), with rather low transfer efficiencies. The primary production/biomass ratio was 80.33. Finns Cycling Index was estimated at 1.99% of the total system throughput. All the attributes of ecosystem maturity and stability explicitly indicate that the ecosystem is in developmental phase. Springer Science+Business Media Dordrecht, 2014 Energy flow nationallicence Modelling nationallicence Ecotrophic efficiency nationallicence Finns cycling index nationallicence Reservoir ecosystem nationallicence Panikkar Preetha Research Centre of Central Inland Fisheries Research Institute, Hessarghatta Lake Post, 560 089, Bangalore, Karnataka, India aut Khan M. Research Centre of Central Inland Fisheries Research Institute, Hessarghatta Lake Post, 560 089, Bangalore, Karnataka, India aut Desai V. Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India aut Shrivastava N. Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India aut Sharma A. Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India aut Environmental Biology of Fishes Springer Netherlands 98/1(2015-01-01), 237-247 0378-1909 98:1<237 2015 98 10641 https://doi.org/10.1007/s10641-014-0255-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-014-0255-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Panikkar Preetha Research Centre of Central Inland Fisheries Research Institute, Hessarghatta Lake Post, 560 089, Bangalore, Karnataka, India aut NATIONALLICENCE 700 1- Khan M. Research Centre of Central Inland Fisheries Research Institute, Hessarghatta Lake Post, 560 089, Bangalore, Karnataka, India aut NATIONALLICENCE 700 1- Desai V. Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India aut NATIONALLICENCE 700 1- Shrivastava N. Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India aut NATIONALLICENCE 700 1- Sharma A. Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/1(2015-01-01), 237-247 0378-1909 98:1<237 2015 98 10641