Hand Line is a traditional fishing gear that commonly used by a fisherman in the Panggang Island, Kepulauan Seribu to catch bigfin reef squid (Sepioteuthis lessosiana). The purpose of this research is to analize the effect of color differences on artificial bait to catchment product of squid and to determine the bait’s colors that produce the most catches of squid. This research was conducted through an experimental method using a randomized block design (RAK) for 14 repetitions. Total of catches that earned amounted to 268 individuals (32,1 kg) consisted of 79 individuals (9,1 kg) caught with artificial baits orange color combination of white, 57 (7,7 kg) caught with artificial baits green color combination of white and 132 individuals (15,3 kg) caught with artificial bait color combination of red and white

Pangasius polyuranodon adalah salah salah satu ikan yang hidup di Sungai Siak Provinsi Riau. Dimana kualitas perairan di Sungai Siak termasuk dalam kategori tercemar berat. Ketersediaan makanan, kesuksesan reproduksi dan pola pertumbuhan ikan merupakan faktor penting dalam kelangsungan hidup ikan Pangasius polyuranodon. Untuk mengetahui pengaruh penurunan kualitas perairan terhadap ikan tersebut maka dilakukan penelitian pada bulan Desember 2016. Pengambilan sampel dilakukan sekali/minggu yang ditangkap di empat stasiun di Kota Pekanbaru. Sebanyak 42 ikan yang tertangkap dengan jumlah ikan betina 18 ekor dan ikan jantan 24 ekor. Pengamatan isi lambung dilakukan menggunakan metode gravimetrik. Isi lambung yang sudah dianalisis digunakan sebagai dasar untuk, menghitung Preponderance Index (PI). Hasil pengamatan menunjukan bahwa makanan utama ikan Pangasius polyuranodon adalah tumbuhan (PI 56,19), makanan pelengkap serangga (PI 18.04) dan sawit (PI 16,45), makanan tambahan berupa gastropoda (PI 2,97) dan Ikan (PI 0,20). Berdasarkan tingkat kematangan gonad hasil pengamatan memperlihatkan bahwa ikan lebih banyak memakan serangga dan sawit untuk perkembangan gonad. Berdasarkan data yang diperoleh dari penelitian ikan ini termasuk omnivore dimana penurunan kualitas perairan Sungai Siak tidak berpengaruh secara signifikan terhadap kebiasaan makan ikan juaro. Pangasius polyuranodon is one of the fish that lives in the Siak River, Riau Province. Where the water quality in the Siak River is included in the heavily polluted category. Availability of food, reproductive success, and growth patterns of fish are important factors in fish survival Pangasius polyuranodon. To determine the effect of decreasing water quality on these fish, a study was conducted in December 2016. Sampling was carried out once / a week and was caught at four stations in Pekanbaru City. A total of 42 fish were caught with 18 female fish and 24 male fish. Observation of gastric contents was carried out using the gravimetric method. The gastric contents that have been analyzed are used as a basis for, counting Preponderance Index (PI). Observations showed that the main food of fish Pangasius polyuranodon are plants (PI 56.19), insect complementary foods (PI 18.04) and oil palm (PI 16.45), additional foods in the form of gastropods (PI 2.97) and fish (PI 0.20). Based on the level of maturity of the gonads, the results showed that fish eat more insects and oil palm for gonad development. Based on the data obtained from this research, this fish is an omnivore and the decrease in the quality of the Siak River waters does not significantly affect the eating habits of the juaro fish.