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All Journal AL-HAYAT: Journal of Biology and Applied Biology Horizon: Indonesian Journal of Multidisciplinary
Parapat, Andreas Jorghy
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Languange, Linguistic, Communication & Media Social Sciences Other

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Kajian Ukuran Rajungan (Portunus pelagicus) Menurut Jenis Kelamin, Tingkat Kematangan Gonad dan Faktor Kondisi di Perairan Pulau Baai Bengkulu Maylandia, Chantika Rachma; Matondang, Dina Ratnasari; Ilhami, Sitti Alya; Parapat, Andreas Jorghy; Bakhtiar, Deddy
Al-Hayat: Journal of Biology and Applied Biology Vol. 4 No. 2 (2021)
Publisher : Fakultas Sains dan Teknologi, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/ah.v4i2.7874

Abstract

The resources of the blue swim crab are currently under pressure on survival due to the increasing effort to catch in nature. Management of blue swim crab resources requires information on the biological conditions of the crab to determine the size, sex, and number that can be caught. This study aims to analyze the structure of carapace width concerning differences in sex, gonad maturity level, and crab condition factors. The method used is the method of observation by measuring the length, weight, and maturity level of the gonads and then analyzed descriptively. The results showed that the size of the crabs was included in the category of juvenile to adult crabs for both male and female crabs. The growth pattern of male crabs with a coefficient of b value of 2.47 and female crabs of 2.78 shows that the growth patterns of crabs in Pulau Baai waters are negative allometric. Most of the female crabs are in the immature stage of the gonads, so the condition factor for the female crabs tends to be lower than the male crabs, this is because most of the female crabs have just passed the spawning phase.
Analisis Kelayakan Usaha Perikanan Tangkap Menggunakan Alat Tangkap Modern dan Tradisional di Kota Bengkulu Parapat, Andreas Jorghy; Cahyadinata, Indra; Mulyasari, Gita; Parapat, Daniel Surya; Silaen, Karina
HORIZON: Indonesian Journal of Multidisciplinary Vol. 4 No. 4 (2026): HORIZON: Indonesian Journal of Multidisciplinary
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/hijm.v4i4.7214

Abstract

Small-scale fishing businesses face challenges in maintaining financial viability due to fluctuations in catches, changes in operational costs, and uncertainty in fishermen's income. These conditions require a business feasibility analysis to support decision-making and the sustainability of capture fisheries businesses. This study aims to analyze the financial feasibility and sensitivity level of fishing businesses using drift gillnets and boat lift nets in Bengkulu City. The study used a quantitative approach with a case study method in two locations, namely Baai Island and the Kota Tuo area, Bengkulu. Primary data was obtained through a survey of fishing vessel owners and analyzed using indicators such as Benefit-Cost Ratio (B/C Ratio), Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PP), and sensitivity analysis. The results of the study indicate that both types of businesses are feasible based on all financial feasibility indicators. The sensitivity analysis shows that the drift gillnet business becomes unfeasible if revenue decreases by 80%, while the boat lift net business becomes unfeasible if operational costs increase by 22%. Comparatively, the drift gillnet business has a better level of financial viability than the boat lift net business. This finding indicates that while both businesses are feasible to develop, the drift gillnet business has greater financial resilience to changing economic conditions, making it a potentially more sustainable alternative for fishermen in Bengkulu City.
Co-Authors Deddy Bakhtiar, Deddy Gita Mulyasari Ilhami, Sitti Alya Indra Cahyadinata, Indra Matondang, Dina Ratnasari Maylandia, Chantika Rachma Parapat, Daniel Surya SILAEN, KARINA