Analisis Pertumbuhan dan Tingkat Kematangan Gonad Ikan Buntal (Tetraodon Fluviatilus)

The aim of this study was to analyze the growth and maturity level of puffer fish (Tetraodon fluviatilus). This research was conducted in October-December 2017. The research site consisted of two places, namely sampling conducted in two locations of the brackish waters of Merauke Regency while the analysis and identification of growth and maturity level of the gonads was carried out in the laboratory of Department of Aquatic Resources Management, Universitas Musamus. Sampling was conducted at Lampu Satu Beach (station I) and Payum beach (station II) using descriptive methods and survey techniques. Sampling was carried out six times at each station for three months. To find out the growth and maturity level of pufferfish gonads, an analysis of growth patterns, condition factors, sex ratio and gonad maturity levels was performed. The results of the study showed that the growth of puffer fish at Station I was negative allometric while at Station two it was positive allometric. The mean value of the puffer fish condition at Station I was 0.0499 while that at Station II was 0.7062. Gonadal maturity level (TKG) at station I and II are at TKG I, at station I is 79.04% while at station II is 69.77%. Based on the results of research conducted it can be concluded that the growth patterns and TKG at Station I are better than Station II.Tujuan dari penelitian ini adalah untuk menganalisis pertumbuhan dan tingkat kematangan gonad ikan Buntal (Tetraodon fluviatilus). Penelitian ini dilakukan pada bulan Oktober-Desember 2017. Lokasi penelitian terdiri dari dua tempat yaitu pengambilan sampel dilakukan di dua lokasi perairan payau kabupaten Merauke sedangkan analisis dan identifikasi terhadap pertumbuhan dan tingkat kematangan gonad  dilakukan di laboratorium jurusan Manajemen Sumberdaya Perairan Universitas Musamus. Pengambilan sampel dilakukan di Pantai Lampu Satu (stasiun I) dan pantai Payum (stasiun II) dengan menggunakan metode deskriptif dan teknik survey. Pengambilan sampel dilakukan sebanyak enam kali ulangan pada masing-masing stasiun selama tiga bulan. Untuk mengetahui pertumbuhan dan tingkat kematangan gonad ikan Buntal maka dilakukan analisis terhadap pola pertumbuhan, faktor kondisi, nisbah kelamin dan tingkat kematangan gonad. Hasil penelitian yang dilakukan diperoleh pola pertumbuhan ikan Buntal pada stasiun I bersifat allometrik negatif sedangkan pada stasiun dua bersifat allometrik positif. Rerata nilai faktor kondisi ikan buntal pada stasiun I adalah 0.0499 sedangkan pada stasiun II adalah 0.7062. Tingkat kematangan gonad (TKG) pada stasiun I dan II berada pada TKG I, pada stasiun I adalah 79.04 % sedangkan pada stasiun II adalah 69.77 %. Berdasarkan hasil penelitian yang dilakukan dapat disimpulkan bahwa pola pertumbuhan dan TKG pada stasiun I lebih baik dibandingkan dengan stasiun II

Potential Regeneration of Mangrove Coastal of Payum Beach Merauke District

The purpose of this study was to analyze the regeneration potential of mangroves found on the coast of Payum, Merauke Regency, Papua Province. This research was conducted in August-October 2018. The data collection technique was purposive sampling using Transect Line Plots. The sampling location was chosen based on the representation of the presence of mangroves in three locations, namely zones A, B and C. The results of this study explained that there were three tree-level mangrove species, namely Avicennia alba, Rhizophora apiculata and Sonneratia alba. Type A. alba dominates in zone A with an important value index (INP) of 205.76%, zone B does not have a certain type that dominates, while Rhizophora apiculata dominates in zone C with INP 185.35%. The potential of the three mangrove species in zones A, B and C is good. Aegialitis annulata species are only found in sapling and seedling levels. In zones A and B are classified as new while in zone C is classified as bad. This study concluded that Avicennia alba, Rhizophora apiculata and Sonneratia alba had the potential to regenerate in all three locations (Zones A, B and C) compared to Aegialitis annulata

Effect of Natural or Artificial Feed on Growth of Tilapia (Oreochromis niloticus)

The purpose of this study was to analyze the composition of nutrients contained in kopyok moss and analyze the effect of natural or artificial feed on the growth of tilapia (Oreochromis niloticus). This research was carried out in October-November 2019, met in the UNPUS MSP laboratory and used the experimental method and Completely Randomized Design (CRD). Test animals used were juvenile tilapia 5-7 g; 5-10 cm and totaling 27 individuals. The fish were divided into three treatment groups, namely P1 (PF500 MS PRIMA FEED feed group), P2 (Takari feed group), and P3 (kopyok moss natural feed group) and each group consisted of nine fish. Feeding is done twice a day on an ad libitum basis for 30 days continuously. The results showed that the  absolute weight gain in the P2 group was higher than in the P1 and P3 groups, the absolute length increase in P3 was higher than in P1 and P2 and the survival rate of P2 was higher than in P1 and P3. This explains that the nutritional content, especially protein in the feed, must be in the amount needed, otherwise the excess protein will be released into the environment in the form of ammonia (NH3), increased ammonia toxicity can cause damage to the gills and kidneys, decreased growth, disruption of the brain system, and dissolved oxygen levels become low. Based on the results of the study it can be concluded that protein is one of the essential nutrients  for growth for survival, but it must be at the amount needed by the body so that it is not released to the environment which will reduce water quality. &nbsp