MEGAWAN, EKA (2023) PENGARUH PEMBERIAN HORMON TIROKSIN (T4) DOSIS BERBEDA DENGAN METODE PERENDAMAN TERHADAP PERTUMBUHAN DAN KELANGSUNGAN HIDUP LARVA IKAN GABUS (Channa striata) (23da394). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Eka Megawan. 26020118120006. Pengaruh Pemberian Hormon Tiroksin
(T4) Dosis Berbeda Dengan Metode Perendaman Terhadap Pertumbuhan dan
Kelangsungan Hidup Larva Ikan Gabus (Chana striata). Tristiana Yuniarti dan
Dewi Nurhayati).
Ikan gabus (C.striata) merupakan salah satu ikan air tawar yang banyak
diminati oleh masyarakat. Ikan gabus memiliki kecepatan pertumbuhan yang
lambat. Menurut KKP (2015), tentang budidaya ikan gabus di kolam memiliki
waktu pemeliharaan 7 bulan dari penebaran benih ukuran 5-8 cm dan dipanen
sampai ukuran 200-300 gram. Untuk mengatasi masalah tersebut salah satunya
bisa dilakukan dengan memberikan hormon tiroksin (T4) melalui perendaman
stadia larva. Hormon tiroksin dapat mempengaruhi laju pertumbuhan melalui
peningkatan laju metabolisme. Penelitian ini berlangsung pada tanggal 25
Februari hingga 7 April 2023 (42 hari) di Teaching Factory FPIK Undip,
Semarang, Jawa Tengah. Penelitian ini menggunakan metode eksperimental
dengan Rancangan Acak Lengkap (RAL) terdiri dari 4 perlakuan dan 3 ulangan
yakni perlakuan A (tanpa pemberian hormon tiroksin), perlakuan B (dosis 0,1
mg/l), perlakuan C (dosis 0,3 mg/l) dan perlakuan D (dosis 0,5 mg/l). Larva ikan
gabus berukuran panjang 0,70±0,02 cm ,bobot 0,0069±0,00035 digunakan sebagai
ikan uji, umur 10 hari. Larva didapatkan dari petani lokal Semarang. Variabel
yang diamati meliputi laju pertumbuhan relatif (RGR), pertumbuhan panjang
mutlak, pertumbuhan bobot mutlak, TKP, TKO, kelangsungan hidup dan kualitas
air. Hasil penelitian menunjukkan bahwa pemberian hormon tiroksin dengan dosis
berbeda mampu memberi pengaruh nyata terhadap RGR, bobot mutlak dan
panjang mutlak larva gabus dengan perlakuan terbaik yaitu dosis tiroksin 0,5
mg/l. Hasil penelitian menunjukan dosis terbaik yaitu perlakuan D (dosis o,5
mg/l) dengan nilai RGR 8,6±1,08 %/hari, pertumbuhan panjang mutlak 6,2±0,3
cm, dan pertumbuhan bobot mutlak 2,41±0,27 g, TKP hasil sama, TKO hasil
sama dan SR 100 %. Hasil pengukuran kualitas air diperoleh suhu berkisar 23-28
oC, pH berkisar 7,5-9,2 dan DO berkisar 4,1-9,1 mg/L.
Kata kunci : Chana striata, dosis, gabus, pertumbuhan, tiroksin

ABSTRACT
(Eka Megawan. 26020118120006. The Effect of Giving Different Doses
of Thyroxine (T4) Hormone by Immersion Method on the Growth and Survival of
Snakehead Fish Larvae (Chana striata). Tristiana Yuniarti and Dewi
Nurhayati).
Snakehead fish (C.striata) is a freshwater fish that is in great demand by
the public. Snakehead fish has a slow growth rate. According to the Ministry of
Maritime Affairs and Fisheries (2015), snakehead fish cultivation in ponds has a
maintenance time of 7 months from 5-8 cm seed stocking and harvesting up to
200-300 gram size. One way to overcome this problem is to give the hormone
thyroxine (T4) through immersion of the larval stage. Thyroxine hormone can
affect the growth rate by increasing the metabolic rate. This research took place
from 25 February to 7 April 2023 (42 days) at the Undip FPIK Teaching Factory,
Semarang, Central Java. This study used an experimental method with a
completely randomized design (CRD) consisting of 4 treatments and 3
replications namely treatment A (without giving thyroxine hormone), treatment B
(dose 0.1 mg/l), treatment C (dose 0.3 mg/l). l) and treatment D (dose 0.5 mg/l).
Snakehead fish larvae measuring 0.70 ± 0.02 cm in length, weight 0.0069 ±
0.00035 were used as test fish, 10 days old. The larvae were obtained from local
farmers in Semarang. The variables observed included relative growth rate
(RGR), absolute length growth, absolute weight growth, TKP, TKO, survival and
water quality. The results showed that the administration of the hormone
thyroxine with different doses was able to have a significant effect on the RGR,
absolute weight and absolute length of snakehead larvae with the best treatment,
namely the dose of thyroxine 0.5 mg/l. The results showed that the best dose was
treatment D (dose 0.5 mg/l) with an RGR value of 8.6 ± 1.08%/day, absolute
length growth of 6.2 ± 0.3 cm, and absolute weight growth of 2.41 ±0.27 g, TKP
same result, TKO same result and SR 100%. The results of water quality
measurements obtained temperatures ranging from 23-28 oC, pH ranging from
7.5-9.2 and DO ranging from 4.1-9.1 mg/L.
Keywords: Chana striata, dose, cork, growth, thyroxine

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