After the Industrial Revolution, the atmospheric greenhouse gases concentrations have increased as well as the human population. With growing population, demands for aquatic animal protein increases and this has greatly promoted the rapid expansion of global aquaculture industry. Previous studies have pointed out that the aquatic ecosystem is an important source of greenhouse gases. However, scarce researches have focused on the greenhouse gases emissions from the aquaculture. In addition, greenhouse gases emissions vary between different types of aquaculture ponds, species and pond management practices. In view of these, we investigated greenhouse gases concentrations of the monoculture Litopenaeus vannamei in semi-indoor and indoor concrete aquaculture ponds. During the farming period to harvest, aquatic environments have been monitored and greenhouse gases concentrations have been analyzed.
The results of pCO2, CH4 and N2O concentrations during the whole farming period are listed in table 1.
Seawaters which had slight variations of greenhouse gases concentrations were pumped respectively from the aquaculture farm’s adjacent sea area to the semi-indoor and indoor ponds as inflow water in the table 1. With increasing farming days, ascending trends of greenhouse gases concentrations in both the pond and outflow waters were observed in the semi-indoor ponds as well as indoor ones. In conclusion, monoculture Litopenaeus vannamei in both semi-indoor and indoor concrete ponds act as sources of greenhouse gases to the atmosphere.