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Performance evaluation of mud crab Scylla olivacea (Herbst, 1896) co-culture with different fish species in confined brackishwater ponds
A. Mondal, S. Bhattacharya, , J.K. Sundaray, R.K. Mohanty
Published in Elsevier B.V.
2020
Volume: 522
   
Abstract
We examined co-culture of Scylla olivacea with different brackishwater fishes in confined earthen ponds to promote livelihood options for coastal farmers. Culture duration was 240 days. Significantly higher (p <. 05) mean body weight was recorded for Scylla olivacea (201.3 ± 8.02 g) in crab-grey mullet (T1) and among different fish species Chanos chanos (350.1 ± 17.89 g) in crab-milkfish combination (T3). Treatment-wise higher (p <. 05) crab productivity of 1007 ± 22 kg ha−1 and fish productivity of 2487 ± 33 kg ha−1 was recorded in T1 and crab-tilapia (T4) respectively. In this experiment, crab-tade mullet (T2) followed by crab-cat fish (T5) and crab-grey mullet (T1) performed well (p <. 05) in terms of higher water productivity against that of crab-tilapia (T4) and crab-milk fish (T3), in spite of higher water use efficiency in T4 (164 g m−3) and T3 (152 g m−3). Higher water productivity was an indicative of efficient water use and species compatibility for higher benefit-cost ratio. Although total crab and fish biomass production was highest in T4, net return in T2 and highest BCR in T5 were significantly (p <. 05) higher. Water quality, growth, production performance and economic parameters in this study indicate technical and economic viability of crab-catfish, crab-tade mullet and crab-grey mullet co-culture. However, crab-catfish combination was found to be the most profitable and recommended for the coastal farmers as both species is well available locally. Further, due to low fingerling cost (INR 1.00 fingerling−1), smaller individual harvest size (45.3 g), low fish biomass output (1233 kg ha−1) and high market demand of Mystus gulio (INR 280.00 kg−1); stocking density of catfish in co-culture with crab can be increased. © 2020 Elsevier B.V.
About the journal
JournalData powered by TypesetAquaculture
PublisherData powered by TypesetElsevier B.V.
ISSN00448486