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Sains Malaysiana 46(12)(2017): 2263–2271 http://dx.doi.org/10.17576/jsm-2017-4612-02
Population Dynamics of Yellowtail Scad, Atule mate (Cuvier
1833) in Marudu Bay, Sabah, Malaysia
(Dinamik Populasi Ikan Selar Biasa, Atule mate (Cuvier 1833) di Teluk Marudu,
Sabah, Malaysia)
M.K. MOHD AZIM1, S.M.N. AMIN1*, N. ROMANO1, A. ARSHAD1,2 & F.M. YUSOFF1
1Laboratory of
Fisheries Biology and Aquatic Ecology, Department of Aquaculture, Faculty
of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang,
Selangor Darul Ehsan, Malaysia
2Center of Marine
Study, Office of the Deputy Vice Chancellor (Research & Innovation)
Universiti Putra Malaysia, Batu 7, Jalan Kemang 6, Teluk Kemang, 71050 Si Rusa, Port
Dickson, Negeri Sembilan Darul Khusus,
Malaysia
3Laboratory of
Marine Biotechnology, Institute of Bioscience, Universiti Putra Malaysia
43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
Received: 11
January 2016/Accepted: 20 April 2017
ABSTRACT
The yellowtail scad, Atule mate, forms important fisheries throughout the Indo-Pacific region. To know
about the stock status of A. mate in Malaysia, various population
parameters were measured, by utilizing length-frequency data, that included
asymptotic length (L∞), growth coefficient (K), mortality rates (Z, F and
M), exploitation level (E) and recruitment pattern of this species from Marudu Bay, Sabah, Malaysia. Total length and body weight
relationship was estimated as W = 0.007TL3.148 (R2 =
0.937). The asymptotic length (L∞) and growth coefficient (K) were
estimated 27.80 cm and 1.50 yr−1, respectively.
Total mortality (Z), natural mortality (M) and fishing mortality (F) were found
to be 4.53, 2.46 and 2.07 yr−1, respectively.
The exploitation level (E) was estimated 0.46. It was showed that the
recruitment pattern was continuous with two major peaks per year. Relative
yield per recruit predicted a maximum exploitation rate (Emax)
which was 0.55. The current E value (0.46) is lower than the optimum
exploitation (E = 0.50) as well predicted Emax. Therefore,
it could be concluded that stock of A. mate in the investigated area of Marudu Bay, Sabah is under exploited.
Keywords: Atule mate; Marudu Bay; Malaysia;
population dynamics; Sabah
ABSTRAK
Ikan selar biasa, Atule mate, memainkan peranan penting bagi perikanan di seluruh kawasan Indo-Pasifik. Untuk mengetahui tentang status stokA. mate di
Malaysia, pelbagai parameter populasi diukur dengan menggunakan data kekerapan panjang termasuk panjang asimtotik (L∞), pekali tumbesaran (K), kadar kematian (Z, F dan M), tahap eksploitasi (E) dan corak pembiakan spesies ini dari Teluk Marudu, Sabah,
Malaysia. Hubungan antara jumlah panjang dan berat badan dianggarkan sebagai W=
0.007TL3.148 (R2 =
0.937). Panjang asimtotik (L∞) dan pekali tumbesaran (K) dianggarkan secara berturutan sebanyak 27.80 cm dan 1.50 yr−1. Jumlah kematian (Z), kematian semula jadi (M) dan kematian tangkapan (F) secara berturutan untukA. mate adalah 4.53, 2.46 dan 2.07 yr−1. Tahap eksploitasi ikan ini (E) adalah 0.46. Terdapat pembiakan berterusan bagiA. mate, tetapi dengan dua kejadian besar bagi setiap tahun. Analisis hasil tangkapan bagi setiap pembiakan meramalkan kadar eksploitasi maksimum (Emax) adalah 0.55. Nilai E terkini (0.46) adalah lebih rendah daripada eksploitasi optimum (E = 0.50) dan juga ramalan Emax. Oleh yang demikian, ini menunjukkan bahawa stok A. mate yang dikaji di Teluk Marudu, Sabah, adalah di bawah tahap eksploitasi.
Kata kunci: A. mate; dinamik populasi; Malaysia;
Sabah; Teluk Marudu
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*Corresponding author; email: smnabd@gmail.com
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