Electronic Theses and Dissertation

Kepiting biola (Uca sp.) adalah kepiting dari Ordo Decapoda dari Famili Ocypodidae, termasuk fauna yang hidup didalam lubang dan mencari makan pada saat air surut pada substrat. Penelitian bertujuan untuk menganalisis struktur komunitas kepiting biola (Uca sp.) dan mengetahui korelasi antara faktor fisik dengan jumlah spesies kepiting biola (Uca sp.) di ekosistem mangrove Gampong Lam Guron Kecamatan Peukan Bada Kabupaten Aceh Besar. Pengumpulan data dilakukan pada Bulan Oktober 2025. Teknik pengumpulan data dilakukan secara purposive sampling dengan ukuran plot 4 m x 4 m. Sampel kepiting dan substrat diambil dan diidentifikasi di Laboratorium Pendidikan Biologi Fakultas Keguruan dan Ilmu Pendidikan Universitas Syiah Kuala. Analisis data menggunakan pendekatan deskriptif kuantitatif meliputi, tingkat kelimpahan, tingkat keanekaragaman, tingkat dominansi, dan korelasi jumlah spesies kepiting biola dengan faktor fisik. Hasil penelitian menunjukkan bahwa struktur komunitas kepiting biola (Uca sp.) meliputi, kelimpahan dikategorikan rendah (stasiun 1) dan sedang (stasiun 2), keanekaragaman dikategorikan sedang, dan dominansi dikategorikan rendah. Korelasi faktor fisik meliputi suhu, pH, salinitas, dan substrat menunjukkan hubungan yang berbeda terhadap setiap jumlah spesies kepiting biola (Uca sp.).

Fiddler crabs (Uca sp.) are crabs from the Decapoda Order of the Ocypodidae Family, including fauna that live in holes and forage at low tide on the substrate. The study aims to analyze the structure of the fiddler crab community (Uca sp.) and determine the correlation between physical factors with the number of fiddler crab species (Uca sp.) in the mangrove ecosystem of Gampong Lam Guron, Peukan Bada District, Aceh Besar Regency. Data collection was carried out in October 2025. The data collection technique was carried out by purposive sampling with a plot size of 4 m x 4 m. Crab and substrate samples were taken and identified at the Biology Education Laboratory, Faculty of Teacher Training and Education, Syiah Kuala University. Data analysis used a quantitative descriptive approach including, levels of abundance, levels of diversity, levels of dominance, and correlations between the number of fiddler crab species with physical factors. The results showed that the structure of the fiddler crab community (Uca sp.) included, abundance was categorized as low (station 1) and medium (station 2), diversity was categorized as medium, and dominance was categorized as low. The correlation of physical factors including temperature, pH, salinity, and substrate showed different relationships with each number of fiddler crab species (Uca sp.).