Sains Malaysiana 48(2)(2019): 271–279

http://dx.doi.org/10.17576/jsm-2019-4802-02

 

Length-Weight Relationships, Condition Factor and Growth Parameters of Periophthalmus chrysospilos (Bleeker, 1852) (Gobiiformes: Gobiidae) in Bayan Bay, Penang, Malaysia

(Hubungan Panjang-Berat, Faktor Keadaan and Parameter Tumbesaran Periophthalmus chrysospilos (Bleeker, 1852) (Gobiiformes: Gobiidae) di Teluk Bayan, Pulau Pinang, Malaysia)

 

MOHD ILMAN CHE ABDULLAH* & KHAIRONIZAM MD ZAIN

 

School of Biological Sciences, Universiti Sains Malaysia, 11800 USM Main Campus, Penang, Malaysia

 

Diserahkan: 1 Jun 2018/Diterima: 12 Oktober 2018

 

ABSTRACT

This study reports the length-weight relationships (LWR), body condition factor (Kn) and growth parameters of Periophthalmus chrysospilos in Bayan Bay of Penang, Malaysia. The values of exponent b for all categories of fish were higher than 3 indicating a positive allometric growth. The mean condition factor (Kn) for all categories of fish also higher than 1 which reflect the well beings of fish in the study area. The b values of LWR and condition factors for male was similar to female fish, but the b values of LWR and condition factors were significantly higher in rainy months compared to the dry months. The parameters of population dynamic show the asymptotic length (L∞) of 13.20 cm, growth coefficient (K) of 0.68 year-1, growth performance index (Ø’) of 2.074, total mortality (Z) of 2.47 year-1, and fishing mortality (F) of 0.70 year-1. The exploitation level (E) was 0.28 year-1 indicating of low exploitation and estimation of length at first capture was 7.69 cm. The annual recruitment pattern of P. chrysospilos was recruited in two peaks per year.

 

Keywords: Allometric growth; asymptotic length; mudskipper; recruitment pattern

 

ABSTRAK

Kajian ini melaporkan hubungan panjang-berat (LWR), faktor keadaan (Kn) dan parameter pertumbuhan Periophthalmus chrysospilos di Teluk Bayan, Pulau Pinang, Malaysia. Nilai eksponen b bagi kesemua kategori ikan adalah lebih tinggi daripada 3 yang menunjukkan pertumbuhan secara positif alometrik. Faktor keadaan bagi kesemua kategori ikan juga lebih tinggi daripada 1 yang menunjukkan keadaan baik ikan di kawasan kajian. Nilai b hubungan panjang-berat dan faktor keadaan bagi ikan jantan adalah sama dengan ikan betina, walau bagaimana pun nilai b bagi hubungan panjang-berat dan faktor keadaan adalah lebih tinggi secara signifikan semasa musim hujan berbanding dengan musim kering. Parameter populasi dinamik menunjukkan panjang asimptot (L∞) adalah 13.20 cm, pekali pertumbuhan (K) adalah 0.68 tahun-1, indeks kemajuan pertumbuhan (Ø›) adalah 2.074, kadar kematian keseluruhan (Z) adalah 2.47 tahun-1, kematian semasa tangkapan (F) adalah 0.70 tahun-1. Aras eksplotasi (E) ikan adalah 0.28 tahun-1 menunjukkan ekploitasi yang rendah dan anggaran panjang pada tangkapan yang pertama adalah 7.69 cm. Corak rekrut tahunan P. chrysospilos adalah dua puncak setahun.

 

Kata kunci: Corak rekrut; ikan belacak; panjang asimptot; tumbesaran alometrik

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*Pengarang untuk surat-menyurat; email: mohdilmancheabdullah@gmail.com

 

 

 

 

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