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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis BIOTROPIA - The Southeast Asian Journal of Tropical Biology
Jr., Muhammad Zairin
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Immunology & microbiology Library & Information Science Veterinary

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SELEKSI INDUK MATANG GONAD PADA SIPUT GONGGONG Laevistrombus turturella Muzahar; Jr., Muhammad Zairin; Yulianda, Fredinan; Suprayudi, Muhammad Agus; Alimuddin; Effendi, Irzal
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 12 No. 1 (2020): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (324.294 KB) | DOI: 10.29244/jitkt.v12i1.28144

Abstract

Siput gonggong Laevistrombus turturella merupakan siput laut yang banyak dikonsumsi masyarakat di Provinsi Kepulauan Riau sehingga populasinya diperkirakan menurun. Upaya pelestarian siput ini perlu dilakukan salah satunya dengan budidaya. Kegiatan budidaya memerlukan ketersediaan induk matang gonad. Tujuan penelitian ini adalah menganalisis ukuran induk siput gonggong matang gonad berdasarkan panjang cangkang dan warna gonad, serta mengevaluasi pengaruh paparan suhu berbeda terhadap kecepatan penentuan jenis kelamin induk. Panjang cangkang siput gonggong diukur dengan jangka sorong, kemudian dipecahkan untuk mengamati warna gonadnya. Data dianalisis dengan student t-test. Perlakuan paparan suhu air 15°C (P1), 20°C (P2), dan 30°C (P3). Tujuh ekor induk siput gonggong dimasukkan ke dalam akuarium sesuai perlakuan, durasi waktu keluar tubuh lunak siput gonggong dari cangkang dicatat. Data dianalisis dengan uji Kruskal Wallis. Hasil penelitian menunjukkan ukuran rata-rata panjang cangkang induk siput gonggong matang gonad dari laut Madong-Tanjungpinang adalah 63,449±5,352 mm (jantan) dan 66,953±5,876 mm (betina). Penentuan jenis kelamin siput gonggong dapat dipercepat dengan pemberian kejutan suhu dengan suhu air 20°C.
Effects of Humic Acid Addition to Feeds With Heavy Metal Cadmium Contamination From Green Mussels on the Growth Performance of Asian Seabass Rasidi, Rasidi; Jusadi, Dedi; Setiawati, Mia; Yuhana, Munti; Jr., Muhammad Zairin; Sugama, Ketut
BIOTROPIA Vol. 26 No. 3 (2019): BIOTROPIA Vol. 26 No. 3 December 2019
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (236.409 KB) | DOI: 10.11598/btb.2019.26.3.1114

Abstract

Although it contains heavy metals, the highly nutritious green mussel Perna viridis is used as a fish meal replacement in fish diets. Fortunately, humic acid (HA) has the ability to chelate heavy metals in animal feeds. Its addition to fish feed formulation is, therefore, needed to prevent the accumulation of heavy metals in the fish's body. Hence, an experiment using a Completely Randomized Design (CRD) with 5 treatments and 3 replications was conducted to evaluate the performance and feed efficiency of Asian seabass Lates calcarifer juveniles with the addition of HA to their green mussel–based diet containing the heavy metal cadmium (Cd). Five experimental diets were formulated with different dosages of HA addition at 0, 400, 800, 1200, and 1600 mg kg⁻¹ of feed as treatments A, B, C, D, and E, respectively. The experimental diets were given to triplicate groups of 15 Asian seabass juveniles with an initial body weight of 4.30 ± 0.60 g over a 70-day cultivation period, feeding until satiation. The results showed that feed consumption, feed digestibility, protein retention, growth performance, and feed efficiency were significantly affected by HA addition in the fish diet. Among all treatments, HA addition of 1600 mg kg⁻¹ produced the best biological response from the Asian seabass. To conclude, the HA addition of 1600 mg kg⁻¹ into the diet was the best dosage, resulting in optimal growth performance and feed efficiency in Asian seabass. The highest dose of HA in Cd-contaminated feeds could reduce Cd content, but had not yet been able to eliminate Cd in fish meat. Therefore, green mussel meal, with HA addition as an alternative protein source, has potential as a feed additive for Cd-contaminated diets of Asian seabass juveniles.
Co-Authors Alimuddin DEDI JUSADI Fredinan Yulianda Irzal Effendi Ketut Sugama Mia Setiawati MUHAMMAD AGUS SUPRAYUDI MUNTI YUHANA Muzahar Rasidi, Rasidi