Positive synergistic impacts of greenhouse temperature and manure driven total environment on breeding success of Tilapia during winter

Global warming and climate change are though known for widespread negative impacts, they do have beneficial as well, but are less known. Here, we studied the interactive impacts of greenhouse mediated raised temperature and manure driven decomposition-cum-total environment on reproductive success of cichlid fish tilapia. Fishes were kept in holding tanks (300 L) placed inside and outside the solar heated structure (modular green house) using identical and comparable doses of organic manure in triplicate during the winter. The manure selected were: (a) cattle manure and saw dust; (b) poultry droppings and saw dust; (c) vermicompost and saw dust; (d) mixed manure with cattle manure, poultry droppings, vermicompost and saw dust; isocarbonic states maintained with (e) vermicompost, and (f) with poultry droppings. Equal number of adult male (8) and female (8) tilapia (1:1) were introduced per tank and reared for 90 days. Water and sediment samples were collected weekly and analyzed for different parameters. Net increment of body weight and production of fry per tank were recorded. Survival of fish was about 10% higher under greenhouse condition compared to ambient air temperature outside. The synergistic effects of manure driven water quality-food resource complex and temperature appeared to be more important than the impact of temperature alone in selecting the treatment that developed the total benign environment and induced tilapia to spawn during winter. The carbon burial rate dependent soil organic carbon had been significantly increased as a consequence of greenhouse effect.