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Title: | Kajian Stok Rajungan (Portunus pelagicus) dengan Analisis Frekuensi Ukuran di Perairan Pesisir Lampung Timur |
Authors: | Zairion Kamal, M Mukhlis Pamungkas, Aditya Sinugraha |
Keywords: | Bogor Agricultural University (IPB) Stock Assesment Length Frequency Analysis East Lampung Blue Swimming Crab |
Issue Date: | 2013 |
Abstract: | The purpose of this research is to assess the stock status of blue swimming crab by analizing the individual and population growth parameter, mortality rate, explotation rate, and recruitment pattern. Sampling was done on a regular basis every month starting from March to August 2012 (6 months). Research sites in the coastal waters of East Lampung District, which was divided into 12 observation stations. Crab sampling was done with the help of local fishermen using bottom gill nets with 3.0 to 4.5-inch mesh size. In general, the growth pattern of crab males, females, and berried females crabs are positively allometric (α, 0:05). Growth equation of males, females and total crabs are: Lt = 190.00 [1-e ^ (-1.30 (t +0.0728))], Lt = 186.00 [1-e ^ (-1.20 (t +0.0796))], and Lt = 191.60 [1 - e ^ -1.30 (t +0.0727)] respectively. The total mortality (Z) is 5.56 per year, while the natural and fishing mortality are 1.28 and 4.28 per year, respectively. Exploitation rate (E) of 0.77 (77%). Based on the analysis of recruitment patterns, suspected one times of peak recruitment per year on crab Portunus pelagicus in the coastal waters of the East Lampung. Tujuan penelitian ini adalah untuk mengkaji stok rajungan melalui analisis pola pertumbuhan, parameter pertumbuhan populasi, laju mortalitas, tingkat eksploitasi, dan pola rekrutmen rajungan. Pengambilan contoh dilakukan secara rutin setiap bulan dimulai dari bulan Maret sampai Agustus 2012 (6 bulan). Lokasi penelitian di perairan pesisir Lampung Timur, yang mana lokasi studi dibagi menjadi 12 stasiun pengamatan. Contoh rajungan ini ditangkap dengan bantuan nelayan setempat, menggunakan jaring insang tetap dengan mesh size 3,0-4,5 inci. Secara umum pola pertumbuhan rajungan jantan, betina, maupun betina mengerami telur adalah allometrik positif (α, 0.05). Persamaan pertumbuhan rajungan jantan, betina dan total masing-masing adalah: Lt = 190.00[1-e^(-1.30(t+0.0728))],Lt = 186.00[1-e^(-1.20(t+0.0796))], dan Lt = 191.60 [1-e^–1.30( t+0.0727)]. Selanjutnya mortalitas total (Z) adalah 5.56 per tahun, sedangkan nilai mortalitas alami dan mortalitas tangkapan masing-masing adalah sebesar 1.28 dan 4.28 per tahun. Laju eksploitasi (E) sebesar 0.77 (77%). Berdasarkan analisis pola rekrutmen, diduga adanya satu kali puncak rekrutmen dalam setahun pada rajungan (Portunus pelagicus) di perairan pesisir Lampung Timur. |
URI: | http://repository.ipb.ac.id/handle/123456789/64573 |
Appears in Collections: | UT - Aquatic Resources Management |
Files in This Item:
File | Size | Format | |
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C13asp.pdf Restricted Access | 1.36 MB | Adobe PDF | View/Open |
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