| Abstrak/Abstract |
One among several factors for fish aquaculture is the availability of sufficient good quality of food. The nutrients should be sufficient for the needs of fish, in order to increase fish production. Microalga is one of alternative sources of protein for fish food, and one among those is Chorella sp. Protein content of Chlorella sp. is very high, around 51- 58 % and consists of various kinds of essential fatty acids as a source of nutrition for fish larvae. Nutritional content and frequency of feeding are suspected as factors which influence the development of fish digestive system. Recently, Algae also prospective source of ethanol biofuel. Ethanol extraction from algae usually produce waste material, which still consist of high protein content. Algal waste with high protein content, possibly valuable for fish feed sources. Therefore, the aim of the study is to examine the effects of fish food derived from algae biofuel-waste on growth and histological structure of wader pari (R. lateristriata) intestine. This research is conducted using R. lateristriata which divided into 5 groups as follow: is control negative (feed with no additional protein), feed with 17,445% algal protein, feed with 26,42% algal protein, feed with 13,595% algal protein, and positive control (feed with commercial fish food Takari, 30% protein). The parameters of the research are morphometric, weight, water quality and structure of histological intestine. The data is analyzed using anova and DMRT, and histological structure of intestine is analyzed by descriptive analysis. The results showed that treatment of feed with a different composition to give effect to the growth of fish and description of histological structure. Treatment of feed P2 (17.445% protein) showed an outgrowth of the highest weight and length. Measurement of villi length and goblet cells number showed positive effect of food treatment. |
