This study aimed to examine the effect of extract of purwoceng Pimpinella alpina for masculinization of Betta splendens. This research used completely randomized design with three treatments that were distinguished by doses of purwoceng extract, which were 10, 20, and 30 µL/L, and 0 µL/L as control. The treatments were given by immersion to 35 embryos at eye spots phase or about 28-hours after fertilization, for eight hours. The immersion process was done for 8 hours. The result showed that 20 µL/L dose of purwoceng extract produced 62.66% male, and hatching rate was 85.71%. This male percentage was higher compared to control (45.91%), but the hatching rate was lower than that of control (98.57%). At the higher dose (30 µL/L), male fish population and hatching rate reduced respectively 39.72% and 68.57%, respectively. Keywords: masculinization, embryo immersion, purwoceng extract, Betta splendens ABSTRAKPenelitian ini bertujuan untuk mengevaluasi pengaruh dosis ekstrak purwoceng Pimpinella alpina extract dalam maskulinisasi ikan cupang hias Betta splendens. Penelitian ini menggunakan metode rancangan acak lengkap dengan tiga perlakuan dan tiga ulangan dosis ekstrak purwoceng. yaitu 10, 20, dan 30 µL/L, serta perlakuan 0 µL/L sebagai kontrol. Perlakuan diberikan melalui perendaman selama delapan jam terhadap 35 embrio saat memasuki fase bintik mata atau sekitar jam ke-28 setelah pembuahan. Hasil penelitian menunjukkan bahwa dosis ekstrak purwoceng 20 µL/L menghasilkan persentase ikan jantan sebesar 62,66%, dan daya tetas telur sebesar 85,71%. Persentase jantan tersebut lebih tinggi daripada kontrol (45,1%), tetapi derajat penetasannya lebih rendah daripada kontrol (98,57%). Pada dosis yang lebih tinggi (30 µL/L), populasi ikan jantan (39,72%), dan derajat penetasan (68,57%) adalah menurun.Kata kunci: maskulinisasi, perendaman embrio, ekstrak purwoceng, Betta splendens Artikel Orisinal
Catfish is one of the leading freshwater commodities stipulated by the Ministry of Marine Affairs and Fisheries (KKP) of the Republic of Indonesia. The annual production target of catfish continues to increase every year. This study aims to analyze the actors and the value chain map of catfish, problems in the value chain of catfish, and the strategies to improve the value chain. This research was conducted by survey method using questionnaire instrument. The survey was done by using purposive sampling technique to 23 catfish farmers, 7 catfish wholesalers, 5 catfish retailers, and 5 catfish processors in Bogor Regency. In this study, there are 4 channels of the value chain of catfish from the production to the consumer. The four actors who are involved in the value chain, namely farmer, wholesaler, retailer, and processor. The constraints along the value chain consist of three aspects: pre-production, production, and post-harvest. Pre-production problems include thequality of seeds, high price of feed, and lack of capital. Problems on production are the weather, fish mortality, and social security. Problems facing post-production cover price instability and lack of bargaining power of farmers. Proposed up-grading strategies to improve the competitiveness are strengthening partnership among farmers, strengthening partnerships between farmers and other strategic partners (traders, and feed companies).
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