Sains Malaysiana38(1): 9-20(2009)

Ostrakod Baharu di Dalam Sedimen Luar Pantai

di Sekitar Pulau Tioman, Pahang

(Recent Ostracoda within Offshore Sediment Around

Pulau Tioman, Pahang)

Noraswana Nor Faiz & Ramlan Omar

Pusat Pengajian Sains Sekitaran dan Sumber Alam

Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia

43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

Diserahkan:  24 Mac 2008 / Diterima: 3 Jun 2008

ABSTRAK

Suatu kajian mengenai kehadiran ostrakod baharu di dalam sedimen luar pantai telah dijalankan di sekitar Pulau Tioman, Pahang. Sebanyak 12 sampel sedimen telah diambil bagi tujuan ini. Sebagai hasilnya, sebanyak 34 spesies, 28 genus dan 14 famili daripada sejumlah 1,985 spesimen ostrakod telah berjaya dikenal pasti. Stesen ST4 mencatatkan jumlah kehadiran ostrakod paling tinggi iaitu sebanyak 442 spesimen diikuti dengan stesen ST5 iaitu 322 spesimen. Stesen ST12 pula mencatatkan jumlah kehadiran ostrakod paling rendah dengan hanya 29 spesies sahaja. Daripada 34 spesies yang diperolehi, Loxoconcha paiki adalah spesies yang paling dominan dengan jumlah individu sebanyak 198, diikuti oleh spesies Pistocythereis bradyi (192 individu) dan Venericythere papuensis (188 individu). Bagi famili pula, Trachyleberididae merupakan famili paling dominan dengan mencatatkan jumlah spesimen tertinggi iaitu 478 (mewakili 24.8% daripada keseluruhan spesimen).

Kata kunci: Ostrakod baharu; Pulau Tioman; sedimen luar pantai

ABSTRACT

A study on the presence of recent ostracoda in the offshore sediment had been done at Pulau Tioman, Pahang. A total of 12 sediment samples were taken for this study. 34 species, 28 genera and 14 families had been identified from a total of 1,985 ostracoda specimens. Station ST4 recorded the highest abundance of ostracoda with 442 specimens and followed by station ST5 with 322 specimens while station ST12 recoded the lowest abundance with only 29 species. From the 34 species discovered, Loxoconcha paiki was the most dominant species with 198 individuals, followed by Pistocythereis bradyi with 192 individuals and Venericythere papuensis with 188 individuals. As for the family, Trachyleberididae is the most dominant family with a total of 478 specimens (representing 24.08% of the total specimens).

Keywords: Offshore sediment; Pulau Tioman; recent ostracoda

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