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All Journal HAYATI Journal of Biosciences Media Akuakultur Indonesian Fisheries Research Journal
Pahlevi, Reza Shah
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences

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Population Structure, Site Fidelity, and Residency Patterns of Whale Sharks (Rhincodon typus) in Botubarani Waters, Gorontalo Province, Indonesia Rahman, Rahman; Suyasa, I Nyoman; Syamsuddin, Awaludin; Pahlevi, Reza Shah
HAYATI Journal of Biosciences Vol. 32 No. 4 (2025): July 2025
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.32.4.908-919

Abstract

Whale shark (Rhincodon typus) is the largest fish species in the world and is classified as endangered. This study is crucial for the conservation of this species and developing effective conservation strategies. The research was conducted in the Botubarani waters, Gorontalo Province. Individual whale shark identification was performed using Photo ID, including the identification of sex and wound location. Photo IDs were processed using the Interactive Individual Identification System (I3S) software and includes information related to the ID, body length, and the time the individual was previously identified. Monitoring of the location, number, timing of whale shark presences and water parameters, was carried out through direct field observations. The results showed that 5 whale shark individuals were identified, all of which were male, with lengths ranging from 4.5 to 4.8 meters, and 1 individual had visible wounds. From 78 days of monitoring, Whale sharks were observed for 70 days and not observed for 8 days. The frequency of whale shark appearances ranged from 1 to 4 individuals per day. Whale sharks in Botubarani waters exhibited site fidelity and a mixed migration pattern. The intensity of their presence is quite high. This intensity is supported by ecological conditions that are optimal for the life of whale sharks, particularly those of juvenile age. The measured water parameters significantly influence their presence.
Review of A Conceptual Framework for Designing and Building Fisheries Co-management Pahlevi, Reza Shah
Indonesian Fisheries Research Journal Vol 30, No 2 (2024): (Desember) 2024
Publisher : Jakarta Technical University of Fisheries

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ifrj.30.2.2024.23-37

Abstract

There has been growing consensus in fisheries management literature that fisheries can only be managed successfully with the power-sharing and partnership of fishers. The objective of this review is to focus on examining the current global literature on fisheries co-management. The review findings lead to the conclusion that various forms of fisheries co-management exist in many countries and have different organizational forms in different fishery settings. The review has identified six principles that should be applied in designing proper fisheries co-management: subsidiarity, conflict and power, property rights, representation and knowledge, community institution building and management functions. 
PENGARUH PEMBERIAN PUPUK ORGANIK DAN ANORGANIK DALAM MENINGKATKAN KUANTITAS RUMPUT LAUT (Kappaphycus alvarezii) Aufat, Agung Gunawan; Mulyono, Mugi; Sektiana, Sinar Pagi; Pahlevi, Reza Shah
Media Akuakultur Vol 20, No 2 (2025): Desember 2025
Publisher : Politeknik Kelautan dan Perikanan Bone

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ma.20.2.2025.81-90

Abstract

Salah satu faktor kunci yang mempengaruhi keberhasilan budidaya adalah ketersediaan unsur hara dalam lingkungan perairan yang dapat ditingkatkan melalui pemupukan. Penelitian ini bertujuan untuk menganalisis pengaruh pemberian pupuk organik dan anorganik terhadap kuantitas dan kualitas K. alvarezii. Rancangan penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan empat perlakuan: pupuk NPK, Urea, DIGROW (organik), dan kontrol tanpa pupuk. Parameter yang diamati mencakup pertumbuhan mutlak, laju pertumbuhan harian (SGR), kualitas air dan logam berat perairan. Penelitian dilakukan di Teluk Banten selama 45 hari menggunakan metode rakit apung. Hasil menunjukkan bahwa pemberian pupuk, khususnya pupuk organik DIGROW, mampu meningkatkan produksi rumput laut hingga 586,67±27,38 g/m², dengan laju pertumbuhan harian tertinggi sebesar 0,33±0,08%. Parameter kualitas air seperti suhu, pH, dan salinitas berada dalam kisaran optimal. Namun, konsentrasi logam berat merkuri pada satu titik pengujian menunjukkan peningkatan signifikan yang berpotensi membahayakan.
Co-Authors Aufat, Agung Gunawan I Nyoman Suyasa Mulyono, Mugi Rahman Rahman Sektiana, Sinar Pagi Syamsuddin, Awaludin