Electronic Theses and Dissertation

ABSTRAK

Pantai Lampanah di Kabupaten Aceh Besar berpotensi sebagai habitat berbagai biota bentik, termasuk undur-undur laut dari famili Hippidae. Penelitian mengenai karakter biologi dan ekologi famili Hippidae di Pantai Lampanah ini dilaksanakan pada bulan Desember 2025 hingga Mei 2026. Penelitian ini bertujuan untuk mengidentifikasi spesies famili Hippidae berdasarkan karakter morfologi, mengukur karakter morfometrik, serta menganalisis tingkat kepadatan dan pola distribusinya. Metode yang digunakan adalah purposive sampling berdasarkan kriteria lingkungan tertentu. Total sampel undur-undur laut yang diperoleh sebanyak 43 individu, terbagi atas 40 individu Emerita emeritus dan 3 individu Hippa adactyla. Hasil pengukuran morfometrik menunjukkan bahwa E. emeritus memiliki kisaran panjang total 2,41–4,29 cm dan berat 1,10–6,40 g, sedangkan H. adactyla memiliki kisaran panjang total 3,09–3,81 cm dan berat 2,40–4,90 g. Kepadatan tertinggi ditemukan pada spesies E. emeritus (Titik 1: 0,0133 ind/m²; Titik 2: 0,0155 ind/m²; Titik 3: 0,0155 ind/m²), sementara kepadatan terendah dicatatkan oleh H. adactyla (Titik 1: 0 ind/m²; Titik 2: 0 ind/m²; Titik 3: 0,0033 ind/m²). Berdasarkan analisis Indeks Morisita, pola sebaran kedua spesies tergolong mengelompok. Analisis substrat menunjukkan dominasi fraksi pasir sebesar 90,6% (kelas tekstur pasir), serta parameter kualitas air yang terukur secara umum masih mendukung keberadaan famili Hippidae. Penelitian ini menyimpulkan bahwa Pantai Lampanah memiliki kondisi lingkungan yang stabil dan karakteristik ekologi yang sesuai sebagai habitat undur-undur laut

Kata kunci: Hippidae, Emerita emeritus, Hippa adactyla, kepadatan, pola sebaran.

ABSTRACT Lampanah Beach in Aceh Besar Regency has potential as a habitat for various benthic organisms, including mole crabs from the family Hippidae. Research on the biological and ecological characteristics of the Hippidae family at Lampanah Beach was conducted from December 2025 to May 2026. This study aimed to identify Hippidae species based on morphological traits, measure morphometric characteristics, and analyze density levels as well as distribution patterns. The method used was purposive sampling based on specific environmental criteria. A total of 43 mole crab specimens were obtained, consisting of 40 individuals of Emerita emeritus and 3 individuals of Hippa adactyla. Morphometric measurement results showed that E. emeritus had a total length range of 2.41–4.29 cm and a weight range of 1.10–6.40 g, whereas H. adactyla had a total length range of 3.09–3.81 cm and a weight range of 2.40–4.90 g. The highest density was observed in E. emeritus (Station 1: 0.0133 ind/m²; Station 2: 0.0155 ind/m²; Station 3: 0.0155 ind/m²), while the lowest density was recorded for H. adactyla (Station 1: 0 ind/m²; Station 2: 0 ind/m²; Station 3: 0.0033 ind/m²). Based on the Morisita Index analysis, the spatial distribution pattern of both species was categorized as clumped. Substrate analysis revealed a dominance of the sand fraction at 90.6% (sand texture class), and the measured water quality parameters generally supported the existence of the Hippidae family. This study concludes that Lampanah Beach exhibits stable environmental conditions and ecological characteristics suitable as a habitat for mole crabs. Keywords: Density, Emerita emeritus, Hippidae, Hippa adactyla, Spatial distribution pattern.