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All Journal Jurnal Ilmiah Mahasiswa Kelautan Perikanan Unsyiah Journal of Marine and Coastal Science
Andrianus Sembiring
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Environmental Science Immunology & microbiology

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Komposisi Organisme Kriptik Brachyura (Krustasea) Pada Karang Mati Pocillopora di Perairan Sabang Muhammad Tawakkal; Cut N. Devira; Maria Ulfah; Andrianus Sembiring; Eka M. Kurniasih; Ambariyanto Ambariyanto; Christopher Meyer
Jurnal Ilmiah Mahasiswa Kelautan Perikanan Unsyiah Vol 2, No 4 (2017): November 2017
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.722 KB)

Abstract

The purpose of this study was to Composition Brachyura cryptic organism (class crustacea) from genus Pocillopora that found on dead corals and to find out the environmental conditions of Sabang waters. The method used in this research was exploring method using Purposive Sampling. The data were collected in August 2016 in three observation stations: Seulako Island, Rubiah Island, and Sumur Tiga. All stations were categorized as deep waters (7-10 m) which have different types and substrate characters. The water quality parameters measured in this study were temperature (300C), salinity (29.5‰ - 32‰), and pH (7). The results of the study showed that there were five families found (Xanthidae, Portunidae, Majoidea, Pilumnidae dan Trapeziidae) with total of 142 individuals that spread into three stations. The most common individual was found in P. Seulako with dead coral volume of 3.2 liters, while the least was found at the site of Sumur Tiga with a dead coral volume of 1.2 liters. The range of dead coral volume found at the P.Seulako, P. Rubiah and Sumur Tiga was 1.2 - 3.2 liters.       Penelitian ini bertujuan untuk mengetahui organisme kriptik Brachyura(krustasea) yang terdapat pada karang mati dari genus Pocillopora di Perairan Sabang. Metode yang digunakan dalam penelitian ini adalah metode explore dengan menggunakan penentuan lokasi secara Purposive Sampling.Pengambilan data dilakukan pada bulan Agustus 2016 di 3 lokasi pengamatan yaitu P. Seulako, P. Rubiah dan Sumur Tiga, yang dikategorikan sebagai perairan dalam (7-10 m). Setiap stasiun memiliki jenis dan karakter substrat yang berbeda. Parameter kualitas air yang diukur dalam penelitian ini adalah suhu (300C), salinitas (29.5‰ - 32‰), dan pH (7). Berdasarkan hasil penelitian ditemukan 5 famili diantaranya famili Xanthidae, Portunidae, Majoidea, Pilumnidae dan Trapeziidae. Jumlah total organisme kriptik Brachyura pada karang mati yang ditemukan sebanyak 142 individu yang tersebar ke dalam 3 stasiun pengamatan. Individu yang paling banyak ditemukan pada P. Seulako, dengan volume karang mati sebesar 3.2 liter sedangkan jumlah individu yang sedikit ditemukan pada lokasi Sumur Tiga dengan volume karang mati 1.2 liter. Kisaran volume karang mati yang ditemukan pada lokasi penelitian P.Seulako, P. Rubiah dan Sumur Tiga adalah 1.2 – 3.2 liter. 
Genetic Diversity of Unhatched Sea Turtle Eggs in Buleleng, Bali Indonesia Hatchery Based on The Mitochondrial Control region Locus Immanuel Pratama; Ni Putu Dian Pertiwi; I Made Oka Riawan; Ni Luh Astria Yusmalinda; Andrianus Sembiring; Luh Putu Candra Apriliani; Ni Komang Rossa Sri Savitri; Srie Marhaeni Julyasih, Ketut; Jafron Syah, Moh; Rita Rachmawati
Journal of Marine and Coastal Science Vol. 14 No. 3 (2025): SEPTEMBER
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jmcs.v14i3.77095

Abstract

Sea turtles are protected animals that are threatened with extinction due to natural and anthropogenic factors such as coastal erosion and illegal trade. This study aims to analyze the genetic diversity of sea turtles in Buleleng using mitochondrial DNA from unhatched egg samples. Samples were collected from two nests at several breeding sites to determine genetic variation within a single conservation area. Molecular analysis was conducted on the control region locus with a sequence length of 869 bp. The results of the identification showed that the samples originated from three species: green sea turtles (Chelonia mydas), olive ridley sea turtles (Lepidochelys olivacea), and hawksbill sea turtles (Eretmochelys imbricata), with sequence similarities of 99.44%–99.77%. The phylogenetic tree formed four clades with bootstrap values of 79–100%, supporting the classification and kinship relationships between species. Low intraspecific genetic distance (0–0.2%) and interspecific genetic distance (16.4–21.4%) indicate high similarity within a species and significant differences between species. The results of this study can be used to strengthen effective genetics-based sea turtle conservation programs in the Buleleng region of North Bali.
Co-Authors Ambariyanto Ambariyanto Christopher Meyer Cut N. Devira Eka M. Kurniasih I Made Oka Riawan Immanuel Pratama Jafron Syah, Moh Ketut Srie Marhaeni Julyasih Luh Putu Candra Apriliani Muhammad Tawakkal Ni Komang Rossa Sri Savitri Ni Luh Astria Yusmalinda Ni Putu Dian Pertiwi Rita Rachmawati TATI NURHAYATI