The aim of this research is to analyze potency and generate organic fertilizer with noneconomic seaweed as material which is bioecologically environment-friendly to stimulate Gracilaria verrucosa production. By utilizing inexpensive and bioecologically beneficial material, it is expected to increase the growth, production, and repair the quality of Gracilaria verrucosa. The specific target of this research is to analyze the effectivity of an-organic fertilizers (urea) with seaweed-based liquid organic fertilizer. The hormone growth of generated urea and seaweed liquid fertilizers is analyzed, including auxin, gibberellin, cytokinin, as well as nutrient (macro and micro). Moreover, the fertilizer is tested on Gracilaria verrucosa. Several noneconomic seaweeds (Codium sp., Ulva sp., Padina sp., Amphiroa sp.) are found in waters area of Sulawesi Tengah. Based on laboratory testing result, it shows that organic fertilizer which has good potency by looking at N, P, and K contents is organic fertilizer Ulva sp., with content of N (0.45 mg/L), P (7.67 mg/L), and K (11.06 mg/L). The result of the research shows that there are apparent differences between the tested treatment (p < 0.05) on Gracilaria sp., growth, and the highest testing on giving liquid fertilizer Ulva sp. (71.0 g) with dose 400 mL/15 L water. The result of Gracilaria verrucosa quality by using liquid fertilizer Ulva sp. is 40.89%, urea fertilizer 38.62%, and without fertilizer 32.57%. The hormone content of Ulva sp. growth is IAA (0.3961 ppm), gibberellin (36.9595 ppm), and kinetin (3.3718 ppm), and urea fertilizer contains IAA (0.4063 ppm), gibberellin (30.2047 ppm), and kinetin (0.0717 ppm).

The climbing perch, Anabas testudineus Bloch 1972, is a valued freshwater fish with a wide distribution in South and Southeast Asia. This study examined the meristic counts and length-weight relation of climbing perch from Sigi District, Central Sulawesi, Indonesia, close to the eastern extremity of the species distribution. Specimens collected from wetlands in Sigi District were weighed and measured (total length) to derive length–weight relation (n = 265) and meristic counts (n = 140). Length (L, in mm) – weight (W, in g) relation (W = a·Lb) parameter b = 2.98 overall; for females b = 3.06 while for males b = 2.88. Maximum length Lmax was 163 mm. The meristic formula using median values was D, XVII+8; A, X+9; P, 13; V, I+5; C, 16. Mean scale counts for both male and female climbing perch were: longitudinal 31 and vertical 15. There was no significant between-sex difference in meristic characters. Although the average growth pattern was isometric, males exhibited a slight allometric negative tendency. Low maximum size is consonant with other indications of a population under pressure, reinforcing the need for sustainable, holistic wetland management. In the context of domestication, high variability in meristic characters may indicate high genetic diversity and/or plasticity, which could provide scope for selective breeding.

Cahaya merupakan faktor eksternal yang dapat mempengaruhi respon fisiologis, reproduksi, dan pertumbuhan ikan. Cahaya lampu dapat dimanfaatkan sebagai pengganti cahaya alami. Ikan nila (Oreochromis niloticus, Linnaeus 1758) merupakan ikan diurnal yang aktif pada siang hari, karena itu diperlukan penentuan spektrum cahaya yang tepat agar kepekaan mata menjadi lebih baik. Penelitian bertujuan mengetahui respon pertumbuhan dan kelangsungan hidup ikan nila dengan perlakuan warna cahaya yang berbeda. Penelitian dilakukan di Desa Binangga, Kecamatan Marawola, Kabupaten Sigi, Sulawesi Tengah pada bulan April sampai Mei 2020. Desain percobaan menggunakan Rancangan Acak Lengkap (RAL) dengan 5 perlakuan dan 4 kali ulangan. Perlakuan A = Warna Putih, B = Warna merah, C = Warna kuning, D = Warna hijau, E = Warna biru. Variabel yang diamati yaitu pertumbuhan bobot mutlak, laju pertumbuhan relatif, dan kelangsungan hidup. Data dianalisis menggunakan analisis ragam (ANOVA) dilanjutkan dengan uji lanjut Beda Nyata Jujur (BNJ) menggunakan program aplikasi Excel dan Minitab 16. Pemberian warna cahaya lampu yang berbeda pada ikan nila memberikan respon pertumbuhan dan kelangsungan hidup yang sangat nyata (p<0,01) terhadap pertumbuhan bobot mutlak, dan laju pertumbuhan relatif dengan tingkat kelangsungan hidup ikan nila berkisar antara 65-80%.