The study was conducted for a period of one year between October 2013 and September 2014 with the aim to establish the relationship between physicochemical parameters and zooplanktons in Karidna Reservoir. Five sampling stations were chosen; the p parameters were determined using standard methods, procedures and instruments. The results obtained for the physico-chemical parameters indicated 31.54 o C), Electrical Conductivity (38.20 Transparency (19.40-40.10 cm) Dissolved Oxygen (2.40 Calcium (2.14-3.86mg/L),Biological Oxygen Demand (2.91 Phosphate-phosphorus (0.04-0.24mg/L), Nitrate 0.21mg/L) Alkalinity (2.51-5.04mg/l). Po highly significant at (P<0.01) between the seasons while non observed in Cl, Hardness, Alkalinity, Temperature and pH. It was only Calcium that was significant at (P>0.01). Zooplankton samples were collected with silk plankton net of 25cm diameter of 70µm meshes attached with a bottle of 50ml capacity at the base a samples of zooplanktons through vertical hauling. identified in this study where Rotifera group represented as the most dominant group securing seven genus .Almost all groups of zooplankton were f whereas dry season represented the lowest number of them. Zooplanktons of all groups were positively correlated with calcium and pH. reservoir and regulation of domesti order to slow down the aging process and conserve its biodiversity for a longer period.

The population of sika deer, in Shiga Prefecture, has increased recently. It is said that the deer have caused damage to tea fields in Koka City (a major tea-producing area in Shiga Prefecture). However, we cannot understand the situation in detail. For this reason, we conducted a questionnaire survey for farmers in July 2016, and we did a tea field survey from September 2016, as well.Firstly, the results of the questionnaire survey showed approximately 60% of the farmers recognized that sika deer have been a bad influence in young arboretums, and approximately 90% of the farmers recognized this in mature orchards.Secondly, the results of field surveys showed that invasion by the sika deer have fed on the undergrowth in the tea fields. But, in late October (the amount of undergrowth had become less), and we often saw sika deer feeding on the tea leaves.In addition, many farmers asserted that applied organic fertilizer attracts sika deer to tea fields, Thus, we researched the feeding habits of sika deer, and as a result, we saw aggressive foraging behavior of sika deer in tea fields to organic fertilizer (for instance, rapeseed oil cake and fish meal). However, the sika deer did not feed on castor oil cake during the observation.

A large quantity of pruned shoots had accumulated in space between hedges by light trimming of canopy after second crop every year, and it was feared that its state influenced the environment of space between hedges. So twenty tea fields in Shiga prefecture were examined in order to investigate actual state of residue accumulated by skiffing and pruning in space