Electronic Theses and Dissertation

Rajungan biru (Portunus pelagicus) merupakan salah satu spesies krustasea laut yang memiliki nilai ekonomis penting. Tujuan dari penelitian ini adalah untuk menganalisis pertumbuhan, meliputi hubungan lebar karapas dan bobot, faktor kondisi serta distribusi frekuensi lebar karapas, menganalisis biologi reproduksi meliputi distribusi TKG, nisbah kelamin, IKG, ukuran pertama kali matang gonad serta menganalisis karakter morfometrik dari spesies ini. Penelitian ini dilakukan mulai dari bulan Agustus hingga Oktober 2025, Pengambilan sampel rajungan sebanyak 150 ekor dilakukan dengan cara memperoleh sampel dari pengepul rajungan yang berlokasi di kawasan Kuala Langsa, Kota Langsa, untuk analisis dan pengamatan terhadap individu rajungan serta sampel telur dilakukan di Laboratorium Genetik dan Biodiversitas Akuatik, Fakultas Kelautan dan Perikanan, Universitas Syiah Kuala. Hasil penelitian menunjukkan bahwa karakter morfometrik nilai Standar Deviasi pada pengukuran Propodus Length menunjukkan nilai yang tinggi (12,88 mm) jika dibandingkan dengan nilai reratanya, karakter lainnya seperti Merus Length, dan Abdomen Width, menunjukkan adanya perbedaan ukuran antar individu rajungan. Pola pertumbuhan rajungan biru (Portunus pelagicus) perhitungan secara keseluruhan adalah allometrik negatif (b

Blue swimming crab (Portunus pelagicus) is a marine crustacean species that has important economic value. The purpose of this study was to analyze growth, including the relationship between carapace width and weight, condition factors and frequency distribution of carapace width, analyze reproductive biology including the distribution of TKG, sex ratio, IKG, size of first gonad maturity and analyze morphometric characters of this species. This study was conducted from August to October 2025, Sampling of 150 blue swimming crabs was carried out by obtaining samples from blue swimming crab collectors located in the Kuala Langsa area, Langsa City, for analysis and observation of individual blue swimming crabs and egg samples were carried out at the Aquatic Genetics and Biodiversity Laboratory, Faculty of Marine Affairs and Fisheries, Syiah Kuala University. The results showed that the morphometric character of the SD value in the Propodus Length measurement showed a high value (12,88 mm) when compared to the average value, other characters such as Merus Length, and Abdomen Width, showed differences in size between individual blue swimming crabs. The growth pattern of blue swimming crab (Portunus pelagicus) on the overall is negative allometric (b