To investigate the effects of high level of lupin meal (LM) supplemented with organic selenium (OS) on the growth and blood biochemistry of barramundi (Lates calcarifer), four isocaloric and isonitrogenous diets were prepared, containing either non-fermented or fermented LM, and either supplemented with 2 mg OS/kg (LM, LM OS , FLM and FLM OS ), or not. A fishmeal (FM)-based diet formulated for juvenile barramundi was used as a control diet. Fish (initial mean weight of 5.88 g) were triplicated and fed the test diets for 75 days. The findings demonstrated that growth performance of fish fed with the FLM and FLM OS diets were similar to fish fed with the FM diet (p > .05). The antioxidant glutathione peroxidase (GPx) activity, and haemoglobin (Hb) of fish fed with the FLM OS diet were significantly higher than that of FM-fed fish (p < .05). Plasma alanine aminotransferase (ALT) activity was significantly increased in fish fed with non-fermented diets (LM and LM OS ) than in those fed with fermented LM diets (FLM and FLM OS ) (p < .05). However, there were no significant differences in ALT activity among LM OS , FLM, FLM OS and FM diets. There was an interaction between the LM and OS on plasma CK activity; the CK of fish fed with diets supplemented with OS was higher in non-fermented LM diets but lower in fermented LM diets (p < .05). This study suggests that fermented LM have an obvious potential to substantially replace 75% FM protein in the diets of barramundi. K E Y W O R D Sfermentation, Lates calcarifer, lupin meal, organic selenium

Salah satu jenis udang yang saat ini gencar dibudidayakan adalah udang vaname (Litopenaeus vannamei). Segmentasi usaha pembenihan mempunyai peranan penting pada sektor budidaya perikanan yang disertai dengan perkembangan unit hatchery yang cenderung semakin meningkat. Kualitas benur merupakan faktor yang sangat berpengaruh terhadap keberhasilan budidaya pada segmentasi pembesaran udang vaname sehingga perlu dilakukan suatu upaya dalam rangka mengatur kegiatan produksi benih udang vaname agar terciptanya benih yang berkualitas dengan keuntungan yang sepadan. Penelitian ini dilakukan untuk mengetahui performansi kinerja budidaya dan mengkaji analisis finansial tentang pembenihan udang vaname. Kajian dilakukan dengan metode observatif dan wawancara di PT. Esaputlii Prakarsa Utama selama 59 hari dan dilakukan studi literatur sebagai data sekunder pada isi kajian. Hasil kajian menunjukan bahwa rata-rata produktivitas larva udang vaname 23.160.000 ekor/siklus, FR 95%, HR 94%, dan SR 42%. Dengan hasil analisis finansial biaya investasi Rp 3.022.383.000, biaya penyusutan 232.203.000/tahun, biaya tetap 1.327.203.000/tahun, biaya tidak tetap 563,217,000/tahun, keuntungan 2.231.755.830/tahun, BEP Harga 1.397.055.789 /tahun, BEP unit 28.238.337 ekor/tahun, PP 1,22 Tahun, dan R/C Ratio 6,9.One type of shrimp that is currently intensively cultivated is vaname shrimp (Litopenaeus vannamei). Hatchery business segmentation has an important role in the aquaculture sector accompanied by the development of hatchery units that tend to increase. The quality of Fry is a factor that greatly influences the success of cultivation in the segmentation of vaname shrimp enlargement so it is necessary to make an effort in order to regulate vaname shrimp seed production activities in order to create quality seeds with commensurate profits. This study was conducted to determine the performance of aquaculture performance, and assess the financial analysis of vaname shrimp hatchery. The study was conducted by observative method and interviews at PT. Esaputlii main initiative for 59 days and conducted a literature study as secondary data on the contents of the study. The results showed that the average productivity of vaname shrimp larvae was 23,160,000 head / cycle, FR 95%, HR 94% and SR 42%. With the results of financial analysis of investment costs Rp 3,022,383,000, depreciation costs 232,203,000 /year, fixed costs 1,327,203,000 /year, non-fixed costs 563,217,000 /year, profit 2,231,755,830 /year, BEP price 1,397,055,789 /year, BEP unit 28,238,337 tail/year, PP 1.22 years and R/C ratio 6.9.

This study aims to determine the effect of giving several types of natural feed and evaluate the best type of feed for thebody length of super red arowana fish (Scleropages formosus). This study used the Complete Randomized Design (RAL) method with 3 treatments and 3 repeats with 3 types of natural feed, namely crickets (A), Hong Kong caterpillars (B), and white shrimp (C). The maintenance of super red arowana fish is carried out for 70 days with a frequency of feeding three times a day and given satiation (ad satiation).  The results showed that the feeding of crickets for super red arowana fish gave the highest length of 0.84±0.08 cm, the highest specific growth rate of 6.00±0.59%, and the survival rate (SR) at the end of the study was 100%. The results of measuring water quality parameters, namely temperatures of 28.7° C -30.4 °C, pH 7.97-8.14, and dissolved oxygen 4.6-5.4 mg.l⁻¹, are in the optimal range for the maintenance of super red arowana fish.