PENGARUH LAMA WAKTU PERENDAMAN HORMON TIROKSIN (T4) TERHADAP PERTUMBUHAN DAN KELULUSHIDUPAN LARVA IKAN NILA PUTIH (Oreochromis niloticus)

Abstract

ABSTRAKIkan nila merupakan salah satu jenis ikan bernilai ekonomis tinggi dan banyak dikonsumsi masyarakat. Sehubungan dengan hal tersebut, perlu dilakukan rekayasa budidaya untuk memenuhi kebutuhan dan permintaan masyarakat. Penelitian ini bertujuan untuk mengetahui pengaruh lama waktu perendaman tiroksin dan mengetahui lama waktu perendaman tiroksin yang terbaik digunakan untuk memacu pertumbuhan dan kelulushidupan larva nila putih. Penelitian ini dilaksanakan di Balai Benih Ikan Siwarak (BBI) Ungaran, Semarang, Jawa Tengah, pada bulan Oktober-November 2018. Ikan uji yang digunakan adalah larva ikan nila putih yang telah lepas kuning telur. Pemeliharaan dilakukan selama 35 hari. Penelitian ini menggunakan 4 perlakuan dan 3 ulangan yaitu A direndam tiroksin 0,1 mg/L selama 0 menit (kontrol), B direndam tiroksin 0,1 mg/L selama 12 jam, C direndam tiroksin 0,1 mg/L selama 24 jam, D direndam tiroksin 0,1 mg/L selama 36 jam. Variabel yang diukur meliputi, pertumbuhan bobot mutlak, pertumbuhan panjang mutlak, laju pertumbuhan spesifik, kelulushidupan, dan kualitas air. Nilai terbaik pertumbuhan bobot mutlak adalah C 1,05±0,21g. Nilai terbaik laju pertumbuhan spesifik adalah C 10,20±0,54%/hari. Nilai terbaik pertumbuhan panjang mutlak adalah C 36,03±2,59cm. Nilai terbaik kelulushidupan adalah B 92,22±0,96% tetapi tidak berpengaruh nyata terhadap semua perlakuan. Dengan demikian lama waktu perendaman tiroksin berpengaruh nyata terhadap pertumbuhan bobot mutlak, laju pertumbuhan spesifik, dan pertumbuhan panjang mutlak larva nila putih namun tidak berpengaruh nyata terhadap tingkat kelulushidupan larva nila putih. Lama waktu perendaman terbaik untuk meningkatkan pertumbuhan dan kelulushidupan larva nila putih adalah 24 jam.Kata kunci : Lama Waktu Perendaman; Tiroksin; Pertumbuhan; Kelulushidupan; Nila PutihABSTRACT Tilapia fish is one kind fish of high economical value and widely consumed by society. In this regard, cultivation needs to be done to meet the demands and demands of the community. The study aims to determine the long-term influence of thyroxine and the long-time immersion of thyroxine is best used to spur the growth and livelihoods of white tilapia larvae. This research was conducted in the Siwarak Fish Seed Hall (BBI) Ungaran, Semarang, Central Java, in October-November 2018. The test fish used are white tilapia larvae that have loose egg yolks. Maintenance is done for 35 days. This study uses 4 treatments and 3 repeats ie A soaked thyroxine 0.1 mg/L for 0 hours (control), B soaked thyroxine 0.1 mg/L for 12 hours, C soaked thyroxine 0.1 mg/L for 24 h, D soaked thyroxine 0.1 mg/L for 36 hours. The variables measured include, absolute weight growth, absolute length growth, specific growth rate, sustainability, and water quality. The best value of absolute weight growth is C 1.05 ± 0, 21g. The best value of the specific growth rate is C 10,20 ± 0.54%/day. Best value of absolute length growth is C 36,03 ± 2, 59cm. The best value of a livelihood is B 92,22 ± 0.96% but has no real effect on all treatment. Thus a long time the immersion of thyroxine has a noticeable effect on absolute weight growth, specific growth rate, and the absolute long growth of white tilapia larvae but does not affect the degree of livelihood of white tilapia larva. The length of the best soaking time to improve the growth and livelihoods of white tilapia larvae is 24 hours.Key words: Immersion Time; Thyroxine; Growth; Survival; White Tilapia

Ontogeny and morphological development of Tilapia (Oreochromis niloticus) larvae in Aceh Province, Indonesia

“…In Figure 1, the graph shows that the growth pattern of tilapia larvae length is exponential. This absolute length exponential growth pattern also occurs in white tilapia larvae using different doses of the thyroxine hormone [12]. This absolute length exponential growth pattern also occurs in white tilapia larvae using different doses of the thyroxine hormone The larval length growth of Rainbow Kurumoi (Melanotaenia parva) for 7 days increased along with the increasing age of the fish [13].…”

The Effect of Immersion Duration of java barb larvae (Barbornymus gonionotus) in the combination of thyroxine hormone and recombinant growth hormone (rGH) on the egg yolk absorption and growth

“…Giving thyroxine hormone can stimulate growth rate. This statement is strengthened by [3] who found that the thyroxine hormone helps regulate fish metabolic processes and stimulate growth rates, improve appetite, increase body weight and enhance the speed of food absorption. Providing rGH to Java barb larvae can increase the growth rate.…”

“…The process starts with exchanging fluids from the outside and then it enters through the mouth and the thyroxine hormone into the blood circulation and then into the thyroid gland. This is proven by [3] stating that the process of the thyroxine hormone enters into the fish body is through the fish's mouth (like drinking). The salinity environment causes the process of fluid exchange (osmoregulation) from the outside into the mouth.…”

“…[2] stated that Thyroxine hormone functions to enhance the fish metabolism. On the other hand, recombinant growth hormone functions to regulate body growth, immune system, reproduction and control metabolism [3]. Hormone application to increase fish growth can be done through several methods, such as injection, immersion (soaking in the water) and oral feeding.…”