Nurhidayat, nFN
Masyarakat Iktiologi Indonesia (MII )

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Optimalisasi reproduksi ikan pelangi kurumoi Melanotaenia parva Allen, 1990 melalui rasio kelamin induk dalam pemijahan [Optimizing of reproduction kurumoi rainbowfish (Melanotaenia parva Allen, 1990 through sex ratio in spawning] Nur, Bastiar; Nurhidayat, nFN
Jurnal Iktiologi Indonesia Vol 12, No 2 (2012): Desember 2012
Publisher : Masyarakat Iktiologi Indonesia (MII )

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Abstract

Kurumoi rainbowfish (Melanotaenia parva) is an ornamental fish from “Kurumoi Lake” West Papua, well known for its potential value as an export ornamental fish commodity in Indonesia. The objective of this research was to determine the optimal sex ratios between males and females of kurumoi rainbowfish, in order to obtain its optimum breeding capacity. Broodstocks sex ratio was used as the treatment on this experiment, four treatments were conducted: (A) 1^: 1$, (B) 2^:1$, (C) 3^:1$, and (D) 4^:1$, with four replications for each treatment. The present experiment was conducted in small scale hatchery of Research Centre for Ornamental Fish Aquaculture, Depok, from May to July 2011. Result shown that the treatment B gave the best result (167±30 eggs). This result was significantly different with the treatment D (85±36 eggs), but in contrary not significantly different with the treatment A (132±29 eggs) and C (127±15 eggs). These results were related positively with the fertilization rate for each treatment, which the best fertilization rate were obtained by the treatment B with 99.69±0.63%, however this result was not significantly different with other treatments (P>0.005). The best hatching rate were obtained in treatment D with 96.49±49%, this result was not significantly different with other treatments. The highest survival rate was obtained from treatment B, with 34.21% (not significantly different with other treatments). Based on that result, we can conclude that sex ratio (B) gave the best result on this experiment. AbstrakIkan pelangi kurumoi (Melanotaenia parva) merupakan ikan hias yang berasal dari perairan “Danau Kurumoi” di dae-rah Papua yang berpotensi sebagai komoditas ekspor ikan hias Indonesia. Penelitian ini bertujuan untuk menetapkan rasio kelamin induk jantan dan betina terbaik bagi pemijahan ikan pelangi kurumoi yang optimal. Perlakuan dalam pe-nelitian ini adalah rasio kelamin induk jantan dan betina: (A) 1:1, (B) 2:1, (C) 3:1, dan (D) 4:1; masing-masing perlakuan dipijahkan sebanyak empat kali (ulangan waktu pemijahan). Penelitian ini dilakukan di ruang pembenihan Balai Penelitian dan Pengembangan Budi Daya Ikan Hias (BPPBIH) Depok pada bulan Mei-Juli 2011. Hasil penelitian menunjukkan bahwa pemijahan ikan pelangi pada perlakuan (B) menghasilkan jumlah telur yang dipijahkan (ovulasi) tertinggi yaitu sebanyak 167±30 butir. Hasil ini berbeda secara signifikan dengan perlakuan (D) dengan jumlah telur yang dihasilkan sebanyak 85±36 butir namun tidak berbeda dengan perlakuan (A) dengan jumlah telur yang dihasilkan sebanyak 132±29 butir serta perlakuan (C) dengan jumlah telur yang dihasilkan sebanyak 127±15 butir. Demikian pula halnya dengan derajat pembuahan telur di mana pada perlakuan (B) didapatkan nilai tertinggi yaitu sebesar 99,69±0,63% namun tidak berbeda secara signifikan dengan ketiga perlakuan lainnya (P>0,05). Derajat penetasan tertinggi diperoleh pada perlakuan (D) yaitu sebesar 96,49±49% namun tidak berbeda secara signifikan dengan ketiga perlakuan lainnya. Sintasan larva umur satu bulan tertinggi diperoleh dari hasil pemijahan menggunakan rasio kelamin induk (B) yaitu sebesar 34,21% namun tidak berbeda secara signifikan dengan ketiga perlakuan lainnya. Pemijahan ikan pelangi kurumoi dengan rasio kelamin induk (B) memberikan hasil yang terbaik pada penelitian ini.
ANATOMIALAT PENCERNAAN IKAN BUNTAL PISANG (Tetraodon lunaris) [Anatomy of The Digestive Apparatus of The Puffer Fish Tetraodon lunaris] Yusfiati, nFN; Sigit, Koeswinarning; Affandi, Ridwan; Nurhidayat, nFN
Jurnal Iktiologi Indonesia Vol 6, No 1 (2006): Juni 2006
Publisher : Masyarakat Iktiologi Indonesia (MII )

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Abstract

This research was aimed to study not only on gross morphologically but also on the histological structure of the Tetraodon lunaris digestive apparatus. The fish samples were obtained from a fisherman at the fish auction in Pelabuhan Ratu, from August 2005 until March 2006. The ratio between intestine and length/body length represented that this fish is carnivorous. The esophagus is short and the gastric forms a simple pouch with two of small diverticula. The intestine consists of a single loop. The esophagus and gastric mucous layer is covered with epithelial stratified cells. The intestine mucous layer has covered with a layer of columnar epithelial cells. The esophagus and gastric muscular layer consist of striated muscle. The sphincter pylorica and the intestine muscular layer consist of smooth muscle. The anus mucous layer consits of epithelial cuboid and it has the muscular layer of striated muscles. The liver has oval-shaped greenish vesica fellea with ductus choledochus emptied at the anterior part of intestine. The hepatocyt cells have a polygonal shape with lipid droplets in its. The exocrine glands of the pancreas tissue showed a set of acinar cells in the liver parencyhm, around portal vein, hepatic artery and biliary ductules.