AbstrakUdang galah (Macrobrachium rosenbergii) yaitu salah satu komoditas perikanan air tawar yang memiliki nilai ekonomis. Permasalahan yang saat ini dihadapi dalam budidaya udang galah adalah jangka waktu budidaya yang relatif lebih lama dibandingkan dengan budidaya udang konsumsi lainnya. Upaya yang dapat dilakukan adalah dengan meningkatkan kualitas pakan, salah satunya melalui pemberian feed additive berupa lisin kedalam pakan udang galah.Penelitian ini bertujuan untuk mengetahui pengaruh penambahan lisin pada pakan komersial terhadap retensi protein dan retensi energi udang galah (Macrobrachium rosenbergii). Penelitian yang dilakukan menggunakan metode eksperimental dengan Rancangan Acak Lengkap (RAL). Analisa data untuk menguji beda nyata menggunakan Analysis of Variant berfungsi untuk mengetahui pengaruh perlakuan.Hasil penelitian menyebutkan bahwa penambahan lisin pada pakan komersial tidak berbeda nyata (p>0,05) terhadap retensi protein dan retensi energi udang galah (Macrobrachium rosenbergii). Kualitas air media pemeliharaan udang galah adalah suhu 29-30 °C, Oksigen terlarut 6,9-7,3 mg/l, pH 7-8, Amonia 0-0,25 mg/l. AbstractGiant Freshwater Prawns (Macrobrachium rosenbergii) is a freshwater fishery commodities economically valuable. The problems currently faced in prawn farming is the cultivation period is relatively long compared with other consumption of shrimp farming. Efforts to do is to improve the quality of feed, such as through the provision of a feed additive lysine feed into the prawns.This study aim's to determine the effect of lysine in commercial feed on protein retention and energy retention of giant freshwater prawn (Macrobrachium rosenbergii). This research used experimental method with a completely randomized design. Statistical analysis using Analysis of Variant (ANOVA) to determine the effect of treatment.The results showed that the addition of lysine to the commercial feed was not significant (p > 0.05) on protein retention and energy retention of giant freshwater prawn (Macrobrachium rosenbergii). The water quality used for giant freshwater prawn is 29-30 ° C for temperature, dissolved oxygen from 6.9 to 7.3 mg / l, pH 7-8, Ammonia 0-0.25 mg / l.

Heavy metal is one of the water pollutants that are harmful to the environment and humans. Cockle (Anadara granosa) is only used for meat so that the shells become waste that pollutes the environment. This study examines the ability of cockle shell powder as an adsorbent in the process of adsorption of heavy metals cadmium (Cd), copper (Cu), and lead (Pb). The ability of the adsorbent was tested through the batch method, using a glass beaker (100 ml) at a speed of 90 rpm; initial metal concentration 20 ppm; adsorbent weighing 0.1 – 0.5 grams; contact time of 20 minutes and 30 minutes. The results showed that the adsorbent weighing 0.5 grams can reduce > 75% concentration of cadmium (Cd), copper (Cu), and lead (Pb). Freundlich and Langmuir adsorption isotherms of cadmium (Cd), copper (Cu), and lead (Pb) had R2 > 0.9.