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All Journal Jurnal Laut Khatulistiwa Jurnal Ruaya : Jurnal Penelitian dan Kajian Ilmu Perikanan dan Kelautan
Telaumbanua, Enjel Delahowuhowu
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Energy Health Professions Immunology & microbiology Physics Social Sciences Veterinary

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OPTIMALISASI PEMIJAHAN IKAN LELE (Clarias gariepinus) SECARA ALAMI: PENGALAMAN PRAKTIS DARI KELOMPOK BUDIDAYA CERIA Laoli, Destriman; Halawa, Alfriend John Saotama; Telaumbanua, Cindy Ardita; Telaumbanua, Enjel Delahowuhowu; Lase, Rosevelt Cerdas; Gea, Rosmawati; Halawa, Vebriman Jaya
Jurnal Ruaya : Jurnal Penelitian dan Kajian Ilmu Perikanan dan Kelautan Vol 13 No 2 (2025): Jurnal Ruaya : Jurnal Penelitian dan Kajian Ilmu Perikanan dan Kelautan
Publisher : UNIVERSITAS MUHAMMADIYAH PONTIANAK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/jr.v13i2.8023

Abstract

ABSTRAK Penelitian ini bertujuan untuk mendokumentasikan dan mengevaluasi proses pemijahan ikan lele (Clarias gariepinus) secara alami melalui praktik langsung di lapangan bersama Kelompok Budidaya Ceria di Desa Tugalagawu, Kecamatan Sirombu, Kabupaten Nias Barat. Metode yang digunakan adalah deskriptif kualitatif, dengan pendekatan observasi partisipatif dan wawancara lapangan. Pemijahan dilakukan tanpa induksi hormon, menggunakan kolam terpal, ijuk sebagai media penempel telur, serta penambahan daun ketapang sebagai penstabil pH alami. Hasil menunjukkan bahwa dari empat ekor induk betina, diperoleh total telur sebanyak ±8.925 butir dengan tingkat pembuahan ±70% (sekitar 6.247 telur terbuahi), dan tingkat penetasan ±65% (sekitar 4.061 larva menetas). Meskipun masih berada di bawah standar literatur, hasil ini menunjukkan bahwa pemijahan alami dapat berhasil jika didukung oleh pemilihan induk yang tepat dan pengelolaan lingkungan yang baik. Penggunaan daun ketapang terbukti membantu menurunkan pH dan mencegah infeksi telur. Penelitian ini menegaskan bahwa optimalisasi pemijahan alami berbasis kearifan lokal dapat menjadi strategi berkelanjutan bagi pembudidaya ikan air tawar. Kata kunci: (Clarias gariepinus, pemijahan alami, daun ketapang, pH air, fertilisasi, daya tetas.)
Analisis Ukuran Tertangkap Dan Kematangan Gonad Ikan Selar (Selar crumenophthalmus) Yang Didaratkan Di Desa Sisarahiligamo, Gunungsitoli Telaumbanua, Enjel Delahowuhowu; Telaumbanua, Betzy Victor; Zebua, Ratna Dewi; Zebua, Nistiarni
Jurnal Laut Khatulistiwa Vol. 9 No. 3 (2026): October
Publisher : Dept. Marine Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/lkuntan.v9i3.112080

Abstract

Bigeye scad (Selar crumenophthalmus) is an economically important small pelagic fish whose utilization requires local biological information on catch size and gonadal maturity. This study aimed to describe length structure, estimate length at first capture (Lc) and length at 50% maturity (L50/Lm), calculate the Lc/Lm ratio, and describe fishers’ perceptions of size-based management in Sisarahiligamo, Gunungsitoli. Biological data consisted of 200 fish landed during approximately two months, while social data were obtained from 30 fishers using a five-point Likert questionnaire. Fish length was grouped into nine classes. Lc was estimated from cumulative length-frequency data using a logistic approach, whereas L50/Lm was estimated using binary logistic regression after gonadal maturity stages I–II were classified as immature and III–V as mature. Perception data were analyzed descriptively. Fish length ranged from 14.4 to 24.5 cm. Estimated Lc was 20.06 cm and L50/Lm was 19.54 cm, giving an Lc/Lm ratio of 1.03 and a difference of 0.52 cm. The 95% confidence interval for L50 was 19.26–19.82 cm based on 5,000 bootstrap samples; an equivalent confidence interval for Lc was not available. The Lc value being slightly higher than L50/Lm indicates relative concordance between catch size and maturity size, but the margin was narrow. Fishers’ perception scores were 2.26 (low) for juveniles, 2.73 (moderate) for impacts, 3.03 (moderate) for minimum size, and 2.39 (moderate) for knowledge. These results provide local biological and social information to support size-based management, but do not by themselves establish a legal minimum catch size or stock sustainability.
Co-Authors Betzy Victor Telaumbanua Destriman Laoli Gea, Rosmawati Halawa, Alfriend John Saotama Halawa, Vebriman Jaya Lase, Rosevelt Cerdas Nistiarni Zebua Telaumbanua, Cindy Ardita Zebua, Ratna Dewi