Developing an Abundance Index of Skipjack Tuna (<i>Katsuwonus pelamis</i>) from a Coastal Drifting Gillnet Fishery in the Southern Waters of Indonesia od Dian Novianto, Ilham, Chandara Nainggolan, Syarif Syamsuddin, Arief Efendi, Sugianto Halim, Yaser Krisnafi, Muhamad Handri, Abdul Basith, Yusrizal, Erick Nugraha, Suciadi Catur Nugroho, Bram Setyadji

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