Sains Malaysiana 38(5)(2009): 625–630

Kepelbagaian Ikan di Tasik Chini, Pahang, Malaysia

(Fish Diversity at Lake Chini, Pahang, Malaysia)

Ahmad Abas Kutty*, Mohd Shuhaimi Othman, Mohd Barzani Ghasim & Sambau Dugat

Pusat Pengajian Sains Sekitaran dan Sumber Alam

Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia

43600 UKM, Bangi, Selangor D.E., Malaysia

Diserahkan: 29 Oktober 2008 / Diterima: 10 April 2009

ABSTRAK

Kajian kepelbagaian dan penyebaran ikan di Tasik Chini telah dijalankan menggunakan jaring insang sebagai alat penangkapan. Sebanyak lapan stesen pensampelan telah dipilih (habitat berbeza) di seluruh tasik dan pensampelan telah dilakukan secara rawak di kawasan yang terpilih. Sejumlah 24 spesies ikan telah direkodkan yang terdiri daripada 944 ekor ikan. Kebanyakan ikan yang direkodkan adalah terdiri daripada famili Cyprinidae. Spesies dominan yang ditemui di Tasik Chini ialah loma (Thynnichthys thynnoides), cemperas (Cyclocheilichythys apogon) dan potok (Notopterus notopterus). Hasil ujian t-berpasangan menunjukkan terdapat perbezaan bermakna kepadatan ikan yang ditangkap di antara waktu siang dan waktu malam (p = 0.01, α = 0.05) dan spesies pemangsa didapati paling dominan pada waktu malam. Kepelbagaian dan kepadatan ikan didapati lebih tinggi semasa pensampelan musim monsun yang dipercayai kesan daripada kemasukan ikan-ikan dari Sungai Pahang melalui Sungai Chini.

Kata kunci: Alometrik; ekosistem air tawar; indeks kepelbagaian; Tasik Chini

ABSTRACT

A study on fish diversity and distribution in Lake Chini was undertaken using gill net as capture tools. Eight sampling stations (various habitats) were chosen within the lake system and random sampling was undertaken at selected area. A total 24 fish species were recorded during the sampling, which comprises of 944 individuals. Majority of fish were represented by the Cyprinidae and Thynnichthys thynnoides, Cyclocheilichythys apogon and Notopterus notopterus were the most family dominance species recorded in Lake Chini. Paired t-test analysis demonstrates that there is a significant fish density difference between day time and night time sampling (p = 0.01, α = 0.05) and predators were dominant during night time. Fish diversity and density were high during monsoon season catch, as a result of immigrant fish of Sungai Pahang to Lake Chini through Chini River.

Keywords: Allometric; diversity indices; freshwater ecosystem; Lake Chini

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*Pengarang untuk surat-menyurat; email: abas@ukm.my