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MAPPING THE POTENTIAL OF MARINE LIVING RESOURCES IN OUTER ISLAND OF SOUTHWEST MOLUCCAS Thomas Mahulette; Andarias Steward Samusamu
Indonesian Fisheries Research Journal Vol 26, No 1 (2020): (June) 2020
Publisher : Research Center for Fisheries

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (432.343 KB) | DOI: 10.15578/ifrj.26.1.2020.19-32

Abstract

Southwest Moluccas or Maluku Barat Daya (MBD) District is one of the small islands located in the southeastern part of outer ring of Indonesian Archipelagic States. There are 17 sub districts covering 48 islands lie scattered in the region in which 31 islands among them were not inhabited. The island has a total population of about 72.300, while 4.069 (5.6 %) are fisherman. The annual fish production in 2017 was reported at 8,971 tons consists of: small pelagic fish (48%), demersal (37%), and large pelagic (15%). The coastal ecosystems include of coral reefs (595 Ha), mangrove (7.8 Ha), and sea grass (57 Ha). Seaweed harvesting and cultivation are ones that would be developed as an alternate livelihood for the community. The goal of this research was to describe a general situation of community livelihood that supported by the role of marine fisheries. The general description of fishing boat and fishing gear, annual production, distribution of fisherman and household around the islands were discussed. The fisheries category were small scale within about one day fishing. The environmental parameters such as monthly air temperature, rainfall and wind speed were plotted as supporting information. The population distribution and fisherman were also used as a base line parameter to elaborate the potential of marine living resource in the interested area. Those resources were described with existing small scale fisheries issues based on limited serial data that gathered through field observation. The secondary data such as Mollucas Southwest District (MBD) annual data from the Local Statistical Board (BPS) annual report were also used in this paper.
SEBARAN DAN KEPADATAN MEGABENTOS DI PERAIRAN PULAU BUTON, SULAWESI TENGGARA Hendrik A.W Cappenberg; Thomas Mahulette
BAWAL Widya Riset Perikanan Tangkap Vol 11, No 2 (2019): (Agustus) 2019
Publisher : Pusat Riset Perikanan, BRSDM KP.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (184.465 KB) | DOI: 10.15578/bawal.11.2.2019.79-93

Abstract

Perairan Pulau Buton dan sekitarnya dengan wilayah terumbu karang yang cukup luas, kaya keanekaragaman hayati laut dan nilai estetika yang tinggi. Terumbu karang bermanfaat banyak bagi manusia dalam berbagai aspek ekonomi, sosial, dan budaya. Penelitian megabentos pada ekosistem terumbu karang ini telah dilakukan pada 2016 (April), 2017 (Juni) dan 2018 (Mei). Pengamatan dilakukan pada 15 stasiun yang tersebar pada pulau-pulau besar dan kecil dari timur hingga barat. Tujuan penelitian ini untuk mengetahui sebaran dan kepadatan megabentos serta kemiripan spesies antar stasiun pada perairan tersebut. Pengambilan data dilakukan dengan menggunakan metode Reef Check Benthos (RCB). Hasil pengamatan menunjukkan ada delapan spesies megabentos, diantaranya Drupella cornus menyebar secara luas (100%), dan memiliki nilai total kelimpahan individu tertinggi, berkisar antara 35,7 – 57,9%, (472 – 704 individu). Sedangkan Acanthaster planci memiliki sebaran yang terbatas dengan kelimpahan individu yang rendah (0,3 – 1,0%). Kepadatan individu megabentos pada pengamatan April berkisar antara 0,16 – 2,31 individu/140m2, pada Juni berkisar antara 0,11 – 1,47 individu/140m2 dan 0,11 – 1,24 individu/140m2 pada Mei. Dari tiga tahun pengamatan (2016 – 2018) kelimpahan rata-rata individu megabentos tidak ditemukan adanya perbedaan yang signifikan. Hasil analisa klaster menunjukkan bahwa kehadiran setiap spesies megabentos antar stasiun pengamatan dipengaruhi oleh kemiripan tipe substrat dan habitat.The waters of Buton Island and its surrounding, has a large coral reef area with high species biodiversity and has an aesthetics value and beneficial for human being in many aspects such as economics, social and culture. Researches on megabenthos in coral reef ecosystems have been conducted in 2016 (April), 2017 (June) and 2018 (May) at 15 stations around large and small islands scattered from east to west. The aims of this study were to know the distribution and abundance of megabenthos and similarity of species between stations in these waters. Data collection is conducted using the Reef Check Benthos (RCB) method. The results shows that eight megabenthos was found, where Drupella cornus has a wide distribution (100%), and has the highest total value of individual abundance, ranging from 35.7 - 57.9%, (472 - 704 individuals). Whereas Acanthaster planci has a limited distribution with a low abundance of individuals (0.3 - 1.0%). The abundance of megabenthos in April’s observations ranged from 0.16 - 2.31 individuals/140m2, in June it ranged from 0.11 - 1.47 individuals/140m2 and 0.11 - 1.24 individuals/140m2 in May. In three years of observation (2016 - 2018) the average abundance of megabenthos individuals is not significantly different. The results of cluster analysis showed that the similarity of megabenthos species between observation stations was influenced by similarities in substrate type and habitat.