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Zulkarnaen Fahmi
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IDENTIFICATION AND CLASSIFICATION OF LAKE BOTTOM SURFACE AND AQUATIC VEGETATION IN LAUT TAWAR LAKE, ACEH Zulkarnaen Fahmi; Husnah Husnah
Indonesian Fisheries Research Journal Vol 21, No 1 (2015): (June 2015)
Publisher : Research Center for Fisheries

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (675.345 KB) | DOI: 10.15578/ifrj.21.1.2015.1-8

Abstract

Identification and classification of benthic habitats in Lake of Laut Tawar, Aceh by using hydro acoustic method can provide data and information on types of substrate and aquatic vegetation in a short time and wide spatial coverage, as done in the present work. Data acoustic collection was performed in 2013 using quantitative echosounder with split beam frequency of 120 kHz, and through a visual observation. The later is destined to look at the bottom types and macrophytes that lie on the line transect of acoustic survey. Analysis of data is to extract the value of bottom volume backscattering for each transect of 0.5-1 km. Classification of the bottom type was done based on the value of Sv using geospatial models. Results show the interval value of Sv for soft bottom ranged between -24.00 dB and -32.00 dB, the type of hard bottom (e.g. rocks, rocky sand substrate) ranged between -14.00 dB and -22.00 dB, whereas the Sv value of macrophyte ranged between- 45.00 dB and -54.00 dB. The percent covers were about 42.90%, 44.71% and 12.93% for hard bottom type, soft bottom and macrophytes, respectively. The types of aquatic vegetation commonly found in the lake were two genera belonging Hydrocharitaceaea and Gramineae. The current work is still lack of information on the classification of organisms into genera scales. Therefore, more signal verification and algorithms verification would be needed in order to estimate macrophytes biomass by comparing with other visual observation.
ZONASI EKOSISTEM PERAIRAN DANAU TOBA UNTUK PEMANFAATAN PERIKANAN BERKELANJUTAN Endi Setiadi Kartamihardja; Zulkarnaen Fahmi; Chairulwan Umar
Jurnal Kebijakan Perikanan Indonesia Vol 7, No 1 (2015): (Mei 2015)
Publisher : Pusat Riset Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.656 KB) | DOI: 10.15578/jkpi.7.1.2015.1-8

Abstract

Danau Toba merupakan danau terluas (112.400 ha) dan termasuk salah satu danau kritis da15 danau di Indonesia serta merupakan danau warisan dunia yang perlu dilestarikan. Perairadanau ini dimanfaatkan oleh berbagai sektor pemanfaat yaitu sumber bahan baku air minumpariwisata, Pembangkit Listrik Tenaga Air (PLTA), perikanan, dan transportasi (perhubungan). Dsektor perikanan, Danau Toba dimanfaatkan untuk kegiatan perikanan tangkap dan perikanabudidaya. Kegiatan perikanan tangkap yang berkembang adalah perikanan bilih (Mystacoleucupadangensis) dan kegiatan perikanan budidaya dalam keramba jaring apung ikan nila merah danila hitam (Oreochromis niloticus) serta ikan mas (Cyprinus carpio) berkembang sejak tahu1988. Pengembangan perikanan berkelanjutan di suatu badan air adalah salah satu tujuan utamyang harus di l akukan dan merupakan bagian yang ti dak terpisahkan dari pembangunaberkelanjutan di antara sektor pemanfaat lainnya. Untuk keperluan tersebut, zonasi perairan danaadalah prasyarat mutlak yang harus dilakukan untuk menjamin keberlanjutan pemanfaataekosistem perairan Danau Toba. Zonasi Danau Toba untuk pengembangan perikanan yang dibahadalam makalah ini merupakan salah satu rancangan zonasi yang tidak dapat dipisahkan dari tatruang ekosistem danau untuk pengembangan berkelanjutan bagi seluruh sektor pemanfaat. Lake Toba, a largest lake with a total surface waters area of 112,400 ha was classified as one of critical lakes among 15 lakes in Indonesia and also as one of the heritage lakes in the world which should be sustained. The lake ecosystem was utilized by multi sectors i.e., source of drinking waters, tourism, electric power generation, transportation, and fisheries. In fisheries sector, the lake was utilized for capture fisheries and floating cage fish culture development. Capture fisheries of the small fish (bilih), Mystacoleucus padangensis was being developed since 2005 and floating net cage culture of red tilapia and Nile tilapia (Oreochromis niloticus) and common carp (Cyprinus carpio) was implemented since 1998 as the main activities developed in the lake. Sustainable development of fisheries is a main objective while a sustainable integrated development among others sector is a whole lake ecosystem objective. Therefore, zoning of the Toba Lake ecosystem for fisheries development which was presented and discussed in this paper was an integral part of whole zoning of the lake ecosystem.
Co-Authors Chairulwan Umar Endi Setiadi Kartamihardja Husnah Husnah