/manager/Index ${session.getAttribute("locale")} 5 Screening three finfish species for their potential in removing organic matter from the effluent of white leg shrimps (Litopenaeus vannamei) farming /manager/Repository/uon:29062 Litopenaeus vannamei) farming effluent contains pollutants that include high levels of organic matter (OM) nutrients and growth- promoting substances. This study investigated the effects of varied concentrations of white leg shrimp (Litopenaeus vannamei) farm wastewater 0, 50, 75 and 100%, on the survival rate (SR) of three finfish species: tilapia (Oreochromis niloticus), grey mullet (Mugil cephalus) and rabbit fish (Siganus guttatus) as part of screening their potential in removing organic matter from the effluent of white leg shrimp farming. The different initial levels of shrimp wastewater from 50% to 100% had no significant effect on the survival rate of tilapia and mullet; but the survival rate of S. guttatus significantly decreased with increasing shrimp wastewater (P < 0.05). The results showed that the removal of BOD, COD and TSS occurred in the range of 66-83, 68-81 and 30-54%; respectively and the removal efficiency of OM by mullet was higher than Tilapia in all treatments. The study also indicated that the reduction highest removal of BOD, COD and TSS was achieved being 83.1%, 80.7and 53,7% respectively, at the medium stocking density (25 fish/m2) of mullet.]]> Tue 13 Jul 2021 11:37:13 AEST ]]> Effects of very high carbon dioxide treatment and cold storage on the quality of Navel oranges /manager/Repository/uon:29446 2) pre- Treatment in combination with cold storage has been shown to be an effective disinfestation treatment to kill quarantine pests such as fruit flies in horticultural produce. However, the effects of high CO2 and cold treatments on fruit quality, including the development of chilling injury and offflavours, needs to be thoroughly examined. In this study, Navel oranges were treated with either air or 95% CO2 in air for 48 h at 2°C then stored in air for up to 18 days at 2°C. Following treatment and storage, there was no evidence of any chilling injury and no significant changes in fruit soluble solids content (SSC) or titratable acidity (TA). Another storage trial examined the time taken for Navel oranges to recover from the 95% CO2 treatment. In this experiment, fruit were stored at 2°C and ventilated with either air or 95% CO2 in air for 70 h. After treatment, the fruit were stored in air and sampled after 1, 2, 3, 4, 5, 8, 9 and 10 days. The results showed that after the high CO2 treatment, the levels of acetaldehyde significantly increased in CO2- Treated fruit and ethanol whereas levels of ethanol decreased. However, within three days storage in air, levels of acetaldehyde returned to pre- Treatment concentrations. These results show the potential of using high CO2 combination treatments as postharvest disinfestation treatments, which do not adversely affect fruit quality after treatment and storage. However more research is recommended to fully understand these fruit responses and their role in overall fruit quality.]]> Sat 24 Mar 2018 07:39:21 AEDT ]]>