Ikan pelian sangat di gemari oleh masyarakat Kebupaten Malinau dan sekitarnya selain rasanya dagingnya yang gurih juga mempunyai kandungan minyak ikan yang tinggi, ikan Tor tambroides atau yang biasa dikenal dengan nama ikan pelian merupakan keluarga dari cyprinidae, ikan yang hidupnya di perairan sungai berarus deras ini masuk dalam ketegori terancam punah dan keberadaanya masuk daftar merah. Tingginya nilai permintaan ikan ini berpotensi terjadi over exploitasi sehingga ketersediaan ikan di alam akan terus berkurang bahkan hingga mengalami kepunahan. Tujuan penelitian mengetahui hubungan panjang berat Ikan Pelian (Tor tambroides). Metode penelitian didekati dengan model hubungan panjang berat ikan dan faktor kondisi ikan. Hasil pengolahan data penelitian ikan pelian didapatkan pola pertumbuhan bersifat isometrik (b= 3,2247), dengan persamaan regresi Y = 0,0054x2247 dengan nilai koefisiensi determinasi (R2) sebesar 0,9247. Nilai faktor kondisi dengan nilai W, di dapatkan kisaran 101 dengan bentuk tubuh yaitu kategori nilai 90-110 bentuk tubuh normal dengan presentase tertinggi (61,54%). Jenis ikan Tor tambroides yang di daratkan di pasar inai Kebupaten Malinau memiliki rata-rata panjang 35,26 cm dan berat 1098,46 gr. Hasil menumjukan pola pertumbuhan bersifat isometric dengan persamaan W-0,0054.L32247 dan faktor kondisi berada pada kisaran rata-rata 1,016273.

Kata Kunci: Hubungan Panjang Berat, Ikan Pelian, Tor tambroides

Pelian fish is very popular with the people of Malinau Regency and its surroundings because, besides the delicious taste of its meat, it also has a high fish oil content. Tortambroides fish generally known as pelian fish are from the Cyprinidae family. This fish, which lives in fast-flowing river waters, is categorized as endangered and its existence is on the red list. The high demand for this fish has the potential for over-exploitation so the availability of fish in nature will continue to decrease and could even become extinct. This research aimed to determine the relationship between the length and weight of Pelian Fish (Tortambroides). The research method was approached by a model of the relationship between fish length and weight and fish condition factors. The results of processing research data on pelian fish showed that the growth pattern was isometric (b= 3.2247), with a regression equation Y = 0.0054x3.2247 with a coefficient of determination (R2) of 0.9247. The condition factor value with the Wr value was found to be around 101 with a body shape with a value category of 90-110 with a normal body shape with the highest percentage (61.54%). The Tortambroides fish species landed at the henna market in Malinau Regency had an average length of 35.26 cm and weight of 1098,46 gr. The results showed that the growth pattern was isometric with the equation W-0.0054.L3.2247 and the condition factor was in the average range of 1.016273. Keywords: Long Heavy Relationship, Pelian Fish, Tortambroides