M. Badrudin
Research Center For Fisheries Management And Conservation, Jakarta

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Keanekaragaman Jenis Ikan Karang di Perairan Belitung Barat, Kepulauan Bangka Belitung Ono Kurnaen Sumadhiharga; Asikin Djamali; M. Badrudin
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 11, No 4 (2006): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.26 KB) | DOI: 10.14710/ik.ijms.11.4.201-209

Abstract

Kondisi terumbu karang dan keanekaragaman jenis ikan karang adalah dua yang tidak dapat dipisahkan. Hal tersebut diamati dalam kegiatan penelitian dengan metode LIT (Line Intercept Transect) di sekitar PulauKalimambang, Pulau Sekutai, Pantai Batu Itam, Pulau Keran dan Pulau Ake-ake yang merupakan kawasan perairan Belitung Barat. Pada penelitian ini secara keseluruhan telah ditemukan sebanyak 1.917 ekor ikan karang, yang terdiri dari 66 jenis berasal dari 18 famili. Jenis-jenis ikan karang ini terdiri dari 42 jenis ikan mayor (ikan hias), 21 jenis ikan target/pangan dan 3 jenis ikan indikator yaitu famili Chaetodontidae. Indeks kekayaan jenis di Pulau Sekutai 7,530; Pulau Kalimambang 9,129; Pantai Batu Itam 7,798; Pulau Keran 7,509; dan Pulau Ake-ake 5,924. Ikan target terdiri dari satu jenis ekor kuning (Caesionidae), satu jenis kerapu (Serranidae), tiga jenis Napoleon (Labridae), tiga jenis kakap merah (Lutjanidae), satu jenis kurisi (Nemipteridae), satu jenis bibir tebal (Haemulidae), empat jenis kakatua (Scaridae), empat jenis serak (Scolopsidae) dan tiga jenis beronang (Siganidae). Sebagian besar kondisi terumbu karang, persentase tutupan karang hidupnya relatif rendah (< 75 %), dan sudah berada dalam keadaan rusak. Terdapat satu jenis ikan indikator, yaitu Chaetodon octofasciatus yang cukup melimpah serta ditemukannya ikan Napoleon (Cheilinus undulatus) yang bernilai niaga tinggi dan dilindungi.Kata kunci: Ikan karang, keanekaragaman jenis, Belitung BaratCoral reefs condition and diversity of coral reef fishes in a certain waters provide an interrelated aspects that could not be separated. Research activities using Line Intercept Transect method have been carried out andcompleted in the waters around the islands of Kalimambang, Sekutai, Keran, Akeake and Tanjung Batu Hitam of the West Belitung. As a whole, a total of 1,917 individual fish from 66 species belong to 18 families hasbeen recorded. These include 42 species of major (ornamental) fishes, 21 species of target fishes and three species of indicator fishes of the family Chaetodontidae. The richness indeces of investigated areas in theWest Belitung waters were of calculated Sekutai Island 7.530;  Kalimambang Island 9.129; Pantai Batu Itam 7.798; Keran Island 7.509; and Ake-ake Island 5.924. The target fishes as food-fish species consist of one species of yellowtail fusilier (Caesionidae), one species grouper (Serranidae), three species Napoleon wrasse (Labridae), three species snappers (Lutjanidae), one species threadfins (Nemipteridae), one species sweetlips (Haemulidae), four species scarid (Scaridae), four species scolopsid (Scolopsidae) and three species rabbit fish(Siganidae). Most of coral reef conditions as seen in the lower percent cover of living coral were less than 75 %, it is likely that the coral reef has been degraded. There is abundance of butterfly fish Chaetodon octofasciatus and the existing of Napoleon wrasse (Cheilinus undulatus). Coral reef destructions occurred in West Belitung waters has been more frequent in the unpopulated islands.Key words: Coral reef fishes, diversity, West Belitung water
BIO-EXPLOITATION STATUS OF BOMBAY DUCK (Harpadon nehereus HAMILTON, 1822) ON TRAWL FISHERY IN TARAKAN WATERS Duto Nugroho; Ria Faizah; Andhika P. Prasetyo; M. Badrudin
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 (541.44 KB) | DOI: 10.15578/ifrj.21.1.2015.53-59

Abstract

North Kalimantan Province, notably Tarakan City marine waters, is one of the important fishing ground in boundary area among Sulu Sulawesi Marine Ecoregion. It produces approximately 100 mt/annum of Bombay duck (Harpadon nehereus) with valued of US$ 750,000. The sustainability of this fishery is a crucially concern given the following: substantial economic contribution, significant dependence of small-scale fishers on this species for their livelihoods. The fishing intensities considerable and growing threats to their habitats. To evaluate the vulnerability of individual species to over exploitation, the spawning potential ratio (SPR) approach applied to describe the status of its existing fisheries. This approach provides the ability to determine fishing mortality as reference points to enhance its sustainability. The objective of this study is to understand this fish biomass resilience to harvesting. The calculated SPR based on the value of estimated length of first capture or Lc at 208 mm is equivalent to the SPR of 28%. With a base line of stocks are generally thought to risk recruitment declining when SPR <20%, recent finding indicated that the existing fishery can be generally described as nearly fully exploited. In recognition of this sector’s has an ecological importance and socio-economic significance, the sustainable development of Bombay duck fisheries should be initiated through developing local fishery committee to provide a their local fishery management plan.