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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 Diserahkan: 11
Januari 2016/Diterima: 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 stok A. 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 untuk A. mate adalah 4.53, 2.46 dan
2.07 yr−1.
Tahap eksploitasi ikan ini (E) adalah 0.46. Terdapat pembiakan berterusan
bagi A. 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 RUJUKAN Abdussamad,
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