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All Journal JURNAL IPTEKS PEMANFAATAN SUMBERDAYA PERIKANAN Proceeding Simposium Nasional Kelautan dan Perikanan Indonesian Journal of Mollusk
Gunarto Latama
Program Studi Budidaya Perairan, Departemen Perikanan, FIKP, Universitas Hasanuddin
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Environmental Science

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Growth and Survival of Juvenile Giant Clam Tridacna squamosa as a Function of Density Gunarto Latama; A. Niarti Ningsih; Inayah Yasir; Hasyim
Jurnal Moluska Indonesia Vol. 3 No. 1 (2019): April 2019
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v3i1.28

Abstract

Juvenile Tridacna squamosa (less than 1 cm shell length) were placed in concrete trays in a coral habitat at the Marine Station of Hasanuddin University, Barang Lompo Island, South Sulawesi, Indonesia. A nylon net was used to protect against predators. The clams were stocked at 3 densities: 1000, 500, and 250 ind. m-2. Growth and survival were monitored in triplicate experiments. Growth was negatively correlated with density and significant differences were found between densities of 1000 and 250 ind m-2. After three months at the lowest density the mean shell length increment was 9 mm. There was no significant relation between density and survival rate.
Prevalensi Epifit Neosiphonia sp. pada Rumput Laut Kappaphycus alvarezii Varietas Coklat dan Hijau Margaretha Bunga; Gunarto Latama; Irawati Irawati
Prosiding Simposium Nasional Kelautan dan Perikanan Vol. 5 (2018): PROSIDING SIMPOSIUM NASIONAL V KELAUTAN DAN PERIKANAN UNHAS
Publisher : Fakultas Ilmu Kelautan dan Perikanan (FIKP), Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (467.891 KB)

Abstract

Penelitian ini bertujuan untuk menganalisis prevalensi serangan epifit Neosiphonia sp. pada rumput laut (Kappaphycus alvarezii) varietas coklat dan hijau. Penelitian ini dilaksanakan pada bulan Maret sampai dengan bulan April 2016 di Perairan Desa Punaga, Kecamatan Mangarabombang, Kabupaten Takalar. Tanaman uji yang digunakan adalah rumput laut jenis K. alvarezii varietas coklat dan hijau yang diperoleh dari Perairan Desa Punaga, Kecamatan Mangarabombang, Kabupaten Takalar. Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan 2 perlakuan yaitu rumput laut varietas coklat dan hijau, dan 5 kali ulangan yaitu 5 kali pengamatan mulai pada awal tanam umur 1 hari, umur 10 hari, umur 20 hari, umur 30 hari dan umur 45 hari saat panen. Data hasil penelitian dianalisis dengan uji statistik non parametrik Chi-Square menggunakan SPSS 15. Hasil analisis statistik Chi-Square menunjukkan bahwa prevalensi serangan epifit Neosiphonia sp. pada rumput laut K. alvarezii varietas coklat dan hijau tidak terdapat perbedaan yang signifikan pada lima kali pengamatan.Kata kunci: Epifit Neosiphonia sp., prevalensi, rumput laut Kappaphycus alvarezii, varietas coklat dan hijau.
ANALYSIS OF THE CYSTOCARP DEVELOPMENT OF SEAWEED (Kappaphycus alvarezii) ON MEDIA ENRICHED WITH A COMBINATION OF NITROGEN AND PHOSPHATE Muhammad Sahir; Rustam; Gunarto Latama; Isma Riskiani
Jurnal IPTEKS Pemanfaatan Sumberdaya Perikanan Vol. 9 No. 2 (2022)
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jipsp.v9i2.22373

Abstract

Seaweed (Kappaphycus alvarezii), in terms of providing seeds in cultivation activities, is still carried out vegetatively, namely cutting the thallus (cuttings), which is then cultivated until it is ready to be harvested (Rao & Reddy, 1997). However, such a method will experience problems, especially the provision of quality seeds on a large scale, and it does not depend on the season. The possible alternative to do is by generative seeding method. K. alvarezii can be developed for cultivation by utilizing the nature of generative reproduction through the development of carpospores, characterised by cystocarps on the surface of the thallus. However, the cystocarp that has been formed needs nutrients in the development process to produce spores of good quality and quantity. Nutrients that are needed to support cystocarp development include nitrogen and phosphate. The benefits of nitrogen and phosphate for seaweed growth cannot be replaced with other elements. This is due to the role of nitrogen as a constituent of protein and phosphate as an energy provider. This study aimed to determine the optimum nitrogen and phosphate enrichment ratio for cystocarp development. The research was carried out from November 2018 to February 2019 at the Seaweed Laboratory of the Takalar Brackish Aquaculture Fisheries Center (BPBAPT). The research location is Mappakalompo Village, Galesong District, Takalar Regency, South Sulawesi Province. They were analyzed at the water quality laboratory of Hasanuddin University to analyse the N and P content in the media. There were 6 treatments with 3 replications each, namely Treatment A: Without enrichment (SW), Treatment B: 1N=0.5 ppm: 1P=0.5 ppm, Treatment C: 2N=1 ppm: 1P= 0,5 ppm, Treatment D : 3N=1,5 ppm : 1P=0,5 ppm, Treatment E : 1N=0,5 ppm: 2P = 1 ppm, and Treatment F : 1N=0,5 ppm : 3P = 1.5 ppm. The results showed that the development of a shorter cystocarp phase was found in treatment D, which was 14 days. Meanwhile, treatment with a long time of 17 days occurred in treatment A (SW).
Co-Authors A. Niarti Ningsih Hasyim Inayah Yasir Irawati Irawati Isma Riskiani Margaretha Bunga Muhammad Sahir Rustam