The practical application of waste recycling as feed supplement is potentially required by small-scale aquaculturist. Furthermore, some of the flour derived from waste sea urchin shells and in adopted in feed, including Deadema setosum were evaluated to estimate the effect on white shrimp Litopenaeus vannamei moulting. This research required the experimentation of four doses with triplicate supplementation (0, 2, 4, and 6 g 100 g-1 of feed) on shrimps four times daily (12% of body weight) for 35 days test period. The juvenile specimens, characterized by an initial weight of 1.61±0.11 g, were stocked at a density of 12 individuals in a 12 L aquarium. In addition, four compartments were created in each aquarium to facilitate progress observations. The proximate analysis results showed a 53.76±0.27% calcium content in the shell flour, which significantly increased (P0.05) after higher dose supplementation, in the sequential order 18.65±0.13%, 20.04±0.08%, 23.18±0.10%, and 25.04±0.11%. Moreover, the frequency and moulting interval with 4 g doses (16.59%±0.36% day-1 and 5.91±0.18 days-1) were significant (P0.05) and considered the best, compared to 0 g (10.48% ± 0.24% day-1 and 9.97±0.37 days-1), 2 g (13.49%±0.96% day-1 and 8.10±0.29 days-1), and 6 g (13.81%±0.24% day-1 and 7.90±0.06 days-1). In addition, the respective trend pattern for both parameters increased and decreased at 4 g and 6 g, correspondingly. The highest moulting intensity was also obtained with the 4 g doses, at a range of 4 to 6 times, while the lowest (0 g) varied from 3 to 4 times. These sea urchin shell flour was determined to have numerous practical applications as a feed supplement with proven ability to stimulate moulting in vannamei shrimp.Keywords:MoultingCalciumShellSea urchinFeed supplementationVannamei shrimp

Gracillaria changii is a high-value seaweed cultivated by the community on the seashore of Ujung Baji Village in Takalar Regency. This cultivation has become the local community's primary source of income, yet production and productivity are still inadequate. To address the issue, this technology dissemination aims to give cultivators with information and abilities in using the vertical method of cultivation to boost production and productivity aquaculture of G. changii . This dissemination used the Community Development (CD) method, which involved the community in every action, including planning, designing and assembling technology, implementation, and assessment. This dissemination was successful in increasing the Hati Mulia Cultivator Group's knowledge and capabilities in vertical seaweed cultivation. When compared to horizontal cultivation, this vertical cultivation technology can increase G. changii production and productivity by at least two to three times

The main issues of seaweed cultivation Kappaphycus alvarezii currently outline are: (a) declining production due to ecological pressure of marine waters, (b) sustainability protection and cultivation business income, and (c) sea space utilization conflicts. To anticipate these problems, one of the strategic alternatives that can be done is to conduct ecologically, technically and socially economically viable cultivation through the utilization of pond land located in coastal land area through intensive cultivation system. This study aims to determine the rate of specific growth (LPS) K. alvarezii. Cultivation conducted in April to May 2018 for 42 days in  ponds. The number of expanses 10 spans, each span of 120 dots is 25 cm. with a weight of 100 g per point. During cultivation fertilization, water change, aeration and water quality control. Weights and biomass are measured weekly by the sampling method in each different stretch group. Data were analyzed using descriptive analysis. The results showed average LPS obtained is 3.38%/day. Water quality during cultivation is within the range that K. alvarezii can tolerate. Keywords: Relocation of cultivation, Ponds, Intensive System, Kappaphycus alvarezii, Specific Growth Rate (LPS)

Penelitian bertujuan untuk mengetahui aktivitas enzim protease, lipase dan amilase pada ikan nila Oreochromis niloticus yang dipelihara pada perairan tawar dan payau. Penelitian ini dilakukan di Kabupaten Pangkep, Kecamatan Ma’rang dan Kecamatan Balocci.  Selanjutnya sampel dibedah dan ususnya dianalisis di laboratorium.  Dari hasil penelitian didapatkan kinerja enzim yang dipelihara pada perairan payau adalah : enzim protease  0,372 lipase  0,112  amilase 0,420 kinerja enzim ikan nila yang dipelihara pada perairan tawar adalah protease 0,33, lipase 0,083  dan amilase 0,071.  Enzim pencernaan ikan yang dipelihara dilingkungan air payau lebih aktif tatistic enzim pencernaan ikan nila yang dipelihara di lingkungan air tawar. Dari hasil uji tatistic pada taraf 95 % aktivitas enzim pencernaan tidak berbeda nyata