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All Journal Biogenesis: Jurnal Ilmiah Biologi Gorontalo Fisheries Journal
Armita Permatasari
Sekolah Tinggi Ilmu Pertanian Muhammadiyah Sinjai
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Other

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Dinamika Populasi Kepiting Bakau (Scylla sp.) di Perairan Kabupaten Sinjai Ridha Alamsyah; A. Liswahyuni; Mapparimeng Mapparimeng; Armita Permatasari
Biogenesis: Jurnal Ilmiah Biologi Vol 5 No 2 (2017)
Publisher : Department of Biology, Faculty of Sci and Tech, Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/bio.v5i2.3696

Abstract

Mangrove crab catching activity to increase and tends to lead exploitation pressure. This study aims to determine the rate of growth, mortality, and rate of exploitation. Sampling on fishermen and collectors whose fishing locations are in predetermined areas. Measurements taken are using ruler and caliper 0,05 for carapace width. Sample measurements were carried out to obtain information on the dynamics of the mangrove crab population. The results obtained are: length of carapace minimum (Lmin) 61 mm, maximum (Lmax) 173 mm, Asimtot carapace width (L∞) 177,7 mm with growth coefficient (K) 0,1 per year, and the value t0 obtained -0,2907. Total mortality rate (Z) 0,743 per year, natural mortality (M) 0,177 per year and mortality of capture (F) 0,566 per year. The rate of exploitation (E) 0,762 per year, indicating that there has been over exploitation of mangrove crabs in Sinjai District.
Tutupan Terumbu Karang di Perairan Pulau Larearea Kabupaten Sinjai Sulawesi Selatan Ridha Alamsyah; Armita Permatasari; Irfan Fauzi
Gorontalo Fisheries Journal Volume 2 Nomor 2 October 2019
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gfj.v2i2.724

Abstract

The condition of coral reefs in Indonesia continues to experience pressure due to human activities and global warming. This study aims to determine the coral coverage in the waters of Larearea Island which will be the basis in the management and conservation of coral reef ecosystems in Sinjai Regency. Measurements were made at each observation station using the Line Intercept Transect method. Standardization of categorizing coral reef conditions refers to the Decree of the Minister of Environment No. 04/ MENLH / 02/2001 concerning the standard criteria for Coral Damage. The results obtained, coral cover in the waters of Larearea Island are included in the broken to moderat category. Live corals are dominated by massive and branched growth types, while dead corals are dominated by dead coral with algae.
Co-Authors A. Liswahyuni Irfan Fauzi Mapparimeng Mapparimeng Ridha Alamsyah