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All Journal Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut Unri Conference Series: Community Engagement
Usman Usman
Fakultas Perikanan dan Ilmu Kelautan, Universitas Riau
Humanities Environmental Science

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Pembuatan pakan alami untuk pengembangan kepiting cangkang lunak di Desa Pulau Cawan Kecamatan Mandah kabupaten Indragiri Hilir T. Ersti Yulika Sari; Usman Usman; Nur Asiah
Unri Conference Series: Community Engagement Vol 2 (2020): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.2.386-392

Abstract

Mud crabs are mangrove crabs that are cultivated and harvested when molting so that their shells become soft and easy to consume. The purpose of this activity is to increase people's income in Desa Pulau Cawan, Kecamatan Mandah, Kabupaten Indragiri Hilir, through soft shell crab cultivation by introducing environmentally friendly cultivation techniques, but it can produce added value in terms of improving the family's economy through soft-shell crab cultivation, one of which is training in making natural feed. This is based on information from farmers who have never received training on feed manufacturing. Through the foster village program, knowledge and technology are given about techniques for making natural feed from lime water and spinach extract as a substitute for vitamalt which is quite expensive. The methods used in the Community activities of the foster Village are lectures, discussions and direct practice with POKDAKAN, starting with the preparation of spinach extract, trash fish, lime water, mixing and drying. The results of the evaluation of the counseling participants showed that 24 participants had never known about making natural feed from lime water and spinach extract as soka crab feed. After participating in this training activity there was an increase of 86.96% in knowledge about how to make natural feed. The partner's assessment of the implementation of this activity is 52.17% strongly agree that this natural feed can be made independently; 52.17% strongly agree that giving lime water and spinach extract to the artificial feed mixture of trash fish has an effect on the acceleration of the molting process in crabs and does not affect the survival of crabs; 60.87% strongly agreed that it could be an alternative livelihood; strongly agree that the molting process in soft-shell crab cultivation is the same as when the crabs are given a vitamolt, which is 20 days.
DISTRIBUSI SPASIAL DAN TEMPORAL IKAN TUNA (Thunnus sp) DI PERAIRAN BARAT SUMATERA BERBASIS SISTEM INFORMASI GEOGRAFIS T Ersti Yulika Sari; Usman Usman; Prihatin Ika Wahyuningrum
Marine Fisheries : Journal of Marine Fisheries Technology and Management Vol. 11 No. 2 (2020): Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jmf.v11i2.33515

Abstract

One tool that can be used to visualize and connect various types of spatial and temporal distribution is Geographic Information System. The purpose of this study is to analyze the pressure of longline fisheries, tuna catches and fishing effort and can model the spatial distribution and temporal (of tuna, during longline fishery activities in 2013. Experimental methods are used in determining the size pixels and kernel shape. The form of the kernel that displays the best results is quartic. The optimal radius produced from the equation 0.68n-0.2 is 0.25 degrees (27.78 km). The CPUE uses raster data on catch density (tail field) and fishing line density (field number of hooks). The calculation is done by multiplying the density of the raster catch (tail) by 1,000 then divided by the density of the raster fishing hooks. The results show that the range of CPUE values ranged from 0.833 - 416. The total area of the total fishing effort was 161,520 km2 with an ffort of catching of 57,502.017 per 1,000 hooks. The total number of CPUE top heatmap is 38,948.29 per 1,000 hooks in 38,080 km2, most are in the Mentawai Strait, other parts are also found in the south of Siberut Island, west of Enggano Island to the Indian Ocean. Seasonal patterns show that the East season is the season with the highest catching effort in the Mentawai Strait, the Siberut Strait to the southern part of Siberut Island and the Transition I season is the lowest catching effort. Keywords: Spatial and temporal distribution, tuna density, CPUE, heatmap, Indian Ocean
Co-Authors Nur Asiah Prihatin Ika Wahyuningrum T. Ersti Yulika Sari