Judul: Analysis of the Fishing System for Hairtail Fish (Trichiurus sp.) at the Cikidang Fish Landing Base, Pangandaran Regency
Abstrak: Penurunan sumberdaya ikan layur di perairan Pangandaran dikhawatirkan akan berdampak kepada kegiatan perikanan layur di Pangkalan Pendaratan Ikan Cikidang, Namun informasi mengenai kegiatan perikanan layur masih belum banyak dikaji secara ilmiah. Penelitian ini bertujuan untuk mengetahui kondisi perikanan layur saat ini, menganalisis faktor-faktor penurunan hasil tangkapan layur, menyusun strategi pengembangan perikanan layur di kawasan Pangkalan Pendaratan Ikan Cikidang, Kabupaten Pangandaran. Metode pengumpulan data yang digunakan adalah pengumpulan data statistik dan wawancara dengan teknik purposive sampling. Analisis data yang digunakan berupa analisis deskriptif, pendekatan sistem, dan SWOT. Hasil penelitian menunjukan bahwa nelayan menggunakan gillnet dan pancing ulur dengan kapal berukuran ≤ 5 GT untuk menangkap ikan layur. Mesh size badan pada gillnet yang digunakan berukuran 0,5 – 1 inci, The decline in hairtail fish (Trichiurus sp.) resources in Pangandaran waters is feared to have an impact on hairtail fish activities at the Cikidang Fish Landing Base, but information about hairtail fish activities is still not widely studied scientifically. This study aims to determine the current condition of hairtail fish, analyze the factors of decreasing hairtail fish catches, develop strategies for the development of hairtail fish in at the Cikidang Fish Landing Base area, Pangandaran Regency. The data collection method used is statistical data collection and interviews with purposive sampling techniques. Data analysis used in the form of descriptive analysis, system approach, and SWOT. The results showed that fishermen used gillnets and hand lines with vessels measuring ≤ 5 GT to catch hairtail fish. The body mesh size of the gillnet used is 0.5 – 1 inch
Keyword: Analisis, sistem, perikanan layur

Judul: Fishing Season and Allowable Catch Size of Hairtail Fish (Trichiurus sp.) in Cikidang Fishing Port
Abstrak: Ikan layur (Trichiurus sp.) merupakan ikan demersal ekonomis penting yang sering dimanfaatkan untuk tujuan ekspor. Tingginya permintaan ekspor menyebabkan meningkatnya upaya penangkapan. Sifat ikan layur yang mempunyai ruaya rendah serta kecenderungan menetap, sehingga memiliki daya tahan yang rendah terhadap tekanan penangkapan. Produksi ikan layur di PPI Cikidang mengalami penurunan sebesar 27.846 kg tahun 2020 menjadi 21.925 kg tahun 2021. Penentuan pola musim penangkapan dan menentukan ukuran ikan layak tangkap dengan mengestimasi ukuran ikan pertama kali matang gonad (length at first maturity) penting dalam upaya penangkapan yang lebih efektif dan berkelanjutan. Hasil penelitian menunjukan bahwa 82% ikan layur di lokasi studi layak tangkap, yakni dengan length at first maturity (Lm) sebesar 50,6 cm. Catch Per Unit Effort (CPUE) tertinggi dari alat tangkap drift gillnet tahun 2017-2021 terjadi pada tahun 2018 dengan musim puncak penangkapan ikan layur terjadi selama 6 bulan yaitu pada musim timur (Juli, Agustus, dan September) musim peralihan (Oktober, dan November) dan musim barat (Desember)., The hairtail fish (Trichiurus sp.) is an economically important demersal fish targeted for the export market. The high demand for exports has led to an increase in fishing efforts. The hairtail fish is a demersal fish with behaviour of low fecundity and is relatively sedentary, resulting in being subject to fishing pressure. The hairtail fish landing in PPI Cikidang tend to decline from 27,846 kg in 2020 to 21,925 kg in 2021. Determining the seasonal fishing pattern and establishing the allowable capture size of the fish by estimating the length at first maturity (Lm) is biologically important to as basic information in achieving more effective and sustainable fishing management. The research results showed that 82% of the hairtail fish sample from the study location exceeded the Lm, and biologically allowable to sustainable catch, with a length at first maturity (Lm) of 50.6 cm. The highest Catch Per Unit Effort (CPUE) from drift gillnet fishing gear from the year 2017 to 2021 was recorded in the year 2018, with the peak fishing season for the fish occurring for six months, specifically during the eastern season (July, August, and September), the transitional season (October and November), and the western season (December).
Keyword: drift gillnet, allowable catch size, hairtail fish, seasonal fishing patterns, trichiurus sp., ikan layur

Judul: Sintesis dan Pencirian Membran Komposit Polistirena Tersulfonasi-Zeolit untuk Aplikasi Direct Methanol Fuel Cell
Abstrak: This study focused on synthesis and characterization of sulfonated polystyrene (SPS)-zeolit composite membrane as a proton exchange membrane for direct methanol fuel cell (DMFC). Sulfonation of polistyrene was done by using SO3 gas from oleum at 60 oC. The composite membrane was then synthesized with zeolite composition variation of 3%, 5%, and 7%. The success of the sulfonation process was indicated by the highest degree of sulfonation of PSS membrane with 15% concentration of polystyrene, that was 99.93%. The PSS Fourier transform infrared spectra of the composite membranes showed sulfonate group (-SO3) at 910.44 cm-1 and O-Si-O at 1091 cm-1. Topography study by using atomatic force microscope showed that the sulfonate groups of PSS were covered by the zeolite. The highest water uptake, proton conductivity, and potential difference were showed by the composite membrane with 5% of zeolite, that were 10.17%, 2.0339 10-6 S/cm, dan 15 mV respectively, showing that the PSS membrane can be applied in DMFC system.
Keyword: zeolite, sulfonation, polystyrene, DMFC, composite