Analysis of Different Depth and Types of Feed on the Growth of Spiny Lobster (Panulirus homarus) Using the Vietnamese Cage Method in Pantai Timur, Kabupaten Pangandaran

The purpose of this research is to find out the effect of different depths and types of feed on the growth of spiny lobsters (Panulirus homarus) Vietnamese cage system on the Pantai Timur Pangandaran. It is expected to provide information to spiny lobster cultivators about the effect of different depths and types of feed on the growth of spiny lobsters (Panulirus homarus) Vietnamese cage method on the Pantai Timur Pangandaran. Maintenance of test animals was carried out for 40 days using cages with a diameter of 80 cm and a height of 90 cm. Each container contains 15 lobster seeds. The frequency of feeding is 2 times a day in the morning at 7.00 and afternoon at 16.00. The amount of test feed given is 20% of the lobster weight for one day. In addition, the mortality rate of lobsters was also observed by looking at the number of lobsters that died each day. Then sampling activities are carried out every 10 days to measure the growth of lobsters so that their growth rate can be observed. Measurement of water quality as supporting data to determine the effect of the feed on water quality and determine the feasibility of water quality is carried out once every 10 days together with the sampling time. Some of the parameters observed were temperature, salinity, dissolved oxygen, and degree of acidity (pH). Lobster growth performance from sampling every ten days showed that treatment C (placement of cages at a depth of 5 meters) was the best, with a daily growth rate (DGR) of 1.97%, and Feed efficiency of 15.01%. This shows that good water quality will affect the survival of fish and their growth. Suggestions that can be put forward so that research will be even better in the future is the addition of a shelter or hiding place for lobsters that are in the process of molting.