Kerapu Macan (Epinephelus fuscoguttatus) memiliki habitat asli di perairan laut dan merupakan ikan karang. Penelitian ini dilaksanakan di unit usaha kelola benih unggul Desa Klatakan, Pecaron Kabupaten Situbondo Jawa Timur. Populasi penelitian ini menggunakan 3 bak pemeliharaan larva dan 20 bak kolam pakan alami. Teknik pengambilan sampel dengan cara langsung dilapangan. Hasil penelitian menunjukkan bahwa Larva D2-D30 kerapu macan diberi pakan jenis rotifer  dengan kepadatan  3-10 individu/ml, Nauplius Artemia salina diberikan saat larva D 15 hingga D35 selanjutnya udang rebon diberikan pada saat larva D26-50.  Dosis pemberian VIT C 1%. Dosis pemberian baik untuk rotifer dan naplius Artemia salina adalah 0,6 ppt. Nilai HR (Hatching rate) telur mencapai 80%. Tingkat kematian tertinggi pada hari D3 sebanyak 50 %.

Perkembangan budidaya laut dari tahun ketahun terjadi peningkatan, usaha perikanan skala rumah tangga banyak berkembang di daerah pesisir Kabupaten Situbondo dikelola oleh pembudidaya ikan hanya atas dasar milik mereka sendiri modal dan pengalaman, tetapi tanpa mempertimbangkan keuangan aspek kelayakan bisnis dan konservasi lahan buidaya. Tujuan untuk mengetahui kelayakan usaha, volume dan nilai produksi budidaya kerapu cantang. Data primer dianalisis menggunakan analisis deskriptif dan analisis kelayakan bisnis melalui pendekatan kriteria investasi. Hasil penelitian menunjukkan bahwa Hasil yang didapatkan adalah  BEP unit: 265.506.000 ekor, BEP harga : 42.657.325 / tahun, B/C Ratio:  1,30 dan Pay back period 2,1.

Natural feed has a very important role in supporting the success of aquaculture. The availability of natural feed is a key factor in the seed / fry phase, where at that phase the fish are still unable to consume additional feed, namely pellet feed. The objectives of this activity are: (1) Introducing Artemia, Improving the entrepreneurial spirit and entrepreneurial motivation, (3) Increasing the knowledge and abilities of SMK Ibrahimy 1 Sukorejo students in terms of decapsulation and artemia culture. This activity targets the fishery students of SMK Ibrahimy 1 Sukorejo, Department of Agribusiness, Brackishwater and Marine Fisheries. Service activities are carried out using lecture and demonstration/practice methods. Evaluation was carried out on the ability of participants to practice artemia decapsulation and artemia culture, indicators of the success of this practice are theoretical and practical knowledge of Artemia sp culture. The success of this activity can be seen from the very high enthusiasm of students and the increasing knowledge of students about the decapsulation of Artemia sp. The obstacle that is used as an evaluation in this activity is that several additional tools are still needed to maximize the decapsulation practice of Artemia sp.

Tujuan dari penelitian ini adalah untuk mengetahui efek sistem akuaponik terhadap normalisasi kualitas air budidaya lele organik, tingkat survival rate ikan Lele serta pertumbuhan tanaman Kangkung pada sistem akuaponik. Metode penelitian yang akan dilakukan adalah metode eksperimen dengan menggunakan rancangan acak lengkap (RAL) dengan padat tebar berbeda yaitu P1 (100 ekor/m2), P2 (250 ekor/m2), dan P3 (500 ekor/m2). Parameter yang diukur adalah kualitas air media budidaya ikan Lele meliputi NH3, NO2, NO3, pH, dan Oksigen terlarut, serta tingkat kelulushidupan ikan Lele dan pertumbuhan tanaman Kangkung (tinggi tanaman, jumlah daun, dan lebar daun). Hasil penelitian menunjukkan pemeliharaan ikan lele dengan sistem akuaponik dengan tanaman Kangkung dapat menstabilkan kualitas air. Nilai kualitas air NH3 (0 – 0.1 ppm), NO2 (0 – 0.881 ppm), NO3 (0 – 1.443 ppm), pH (6 – 7.8), dan oksigen terlarut (4.5 – 6.2 ppm). Nilai survival rate P1 (95.2%), P2 (94.3%), P3 (89.6%). Pertumbuhan tanaman Kangkung terbaik didapatkan pada perlakuan P3 yaitu tinggi tanaman 37.2 cm, lebar daun 2.5 cm, dan jumlah daun 24 helai. Hasil penelitian menunjukkan kualitas air relative stabil. Semakin tinggi pada tebar semakin rendah tingkat survival rate ikan Lele, disisi lain semakin tinggi padat tebar semakin bagus pertumbuhan tanaman Kangkung.

Grouper production in Indonesia can be supported by hybridization technology which can produce grouper species with relatively faster growth and more resistance to disease. Cantang grouper is a type of grouper fish that was engineered by crossbreeding between female tiger grouper (Epinephelus fuscoguttatus) and male grouper Kertang (Epinephelus lanceolatus). The purpose of this study was to determine the stages and technology of nursery grouper Cantang which was carried out at BPBAP Situbondo. The method used in this research is the method of observation, participation, and interviews. The primary data needed in this study are data on infrastructure, data on the number and size of seeds, feed management, water quality management, and harvesting. The data is presented with a descriptive method by discussing the data that has been obtained compared to the theories that have developed at this time. The results of this study indicate that cantang grouper nursery activities start from tank preparation, water filling, seed selection and distribution, feed management, water quality, fish pest and disease control, grading, and harvesting of cantang grouper seeds. During the practice period, the seeds were spread from hatcheries with a stocking density of 3000 to 5000 individuals in one tank with a size of 4 x 2.5 x 1 m, or the equivalent of 300 to 500 individuals/m3. The distribution of seeds is carried out after the acclimatization process, namely the adaptation process before releasing the seeds. After the seeds are removed, the tub is given an antiseptic to prevent disease in the seeds. There are several factors that can affect the growth rate of seeds, namely water quality management and feeding. During the maintenance period, a flowing water system is used, so that the water used is continuously renewed. In the morning, the seeds are flushed and soaked using fresh water, with the aim of releasing mucus on the seeds so as to reduce the potential for disease outbreaks. Nursery grouper at BPBAP Situbondo can run optimally by paying attention to the stages of cultivation, especially in the feed management and water quality management.