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Ketahanan Hidup Bibit Ikan Mujair (Oreochromis mossambicus) Dan Nilai Parameter Kimiawi Lingkungan Pada Media Pemeliharaan Bioflok Dengan Debris Daluga Sebagai Sumber Karbon Emma Mauren Moko; Ferencia Esananda Rattu; Ernest Hanny Sakul; Orbanus Naharia; Aser Yalindua; Livana Dethris Rawung
Jurnal Kimia Fullerene Vol 6 No 1 (2021): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v6i1.253

Abstract

Bioflok adalah teknik budidaya ikan untuk mengelola lingkungan budidaya dengan memanfaatkan mikroorganisme untuk meningkatkan penggunaan pakan dan sisa hasil metabolisme dengan penambahan sumber karbon organik. Penelitian ini bertujuan untuk mengetahui ketahanan hidup bibit ikan mujair (Oreochromis mossambicus) dan nilai parameter kimiawi lingkungan pada media pemeliharaan bioflok dengan debris daluga (Crytosperma merkusii) sebagai sumber karbon. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 3 ulangan. Perlakuan yang dilakukan adalah tanpa bioflok, C:N=15, C:N=20, dan C:N=25. Hewan uji ikan mujair dengan panjang rata-rata 5,5 cm di tebar 10 ekor setiap ember. Parameter yang diamati adalah kualitas air yang meliputi suhu, pH, konduktivitas, dan redoks dan Survival Rate (SR) ikan mujair. Dari hasil penelitian diketahui bahwa perlakuan terbaik pada C:N=25 dengan persentase SR tertinggi yaitu, 86,67%. Kualitas air selama penelitian ada pada kondisi optimal di setiap perlakuan.
Identifikasi Teripang Laut (Holothuroidea) dari Perairan Laut Pulau Kabaruan Berdasarkan Identifikasi Morfologi dan DNA Barcoding Ferencia Esananda Rattu; Revolson Mege; Nonny Manampiring; Verawati Ida Yani Roring; Sukmarayu Gedoan; Yermia Mokosuli
Bioscientist : Jurnal Ilmiah Biologi Vol 12, No 1 (2024): June
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v12i1.9649

Abstract

Indonesia is known with its high biodiversity. One of them is sea cucumber. Various species of sea cucumbers are found in Indonesian sea in Talaud Regency at Kabaruan Island. Identification of sea cucumbers to reveal the biodiversity of sea cucumbers in Kabaruan Island, which is almost unknown. This research was to identify six samples of sea cucumber (Holothuroidea) in Kabaruan Island based on morphology and DNA barcoding using the COI gene. The differences between each species can be seen from the morphological characteristics, the length and width of sea cucumbers, papillae, pattern and color. The results showed that there were 4 species from 6 samples, which is Holothuria leucospilota, Holothuria whitmaei, Eleutherozoa sp., and Holothuria atra. That six samples with the code A1, A2, B1, C1, and C2 have a homology level of 99%-100% with the target nucleotide sequence from GenBank. Meanwhile, the sample’s code A3 has a homology level of 90% with the Eleutheroza sp. so there is a possibility that sample A3 is a new taxa that has the highest similarity to the Eleutheroza sp. From the six samples, it was found that samples A2 and B1 had the highest level of similarity which is 100%. Meanwhile, the samples with the lowest percentage values are samples A3 and B1 and samples A2 and A3, with a percentage value of 82.75%. There were 4 species from six samples found in Kabaruan Island. There is a possibility that Sample A3 is a new species that is similar to Eleutheroza sp.