Distribusi frekuensi panjang temporal ikan cakalang (Katsuwonus pelamis, Linnaeus, 1758) di Samudera Hindia bagian timur yang tertangkap purse seine pelagis besar dan keragaan selektivitasnya = Temporal length frequency distribution of skipjack tuna (Katsuwonus pelamis, Linnaeus, 1758) in the Eastern Indian Ocean caught by large pelagic purse seine and its selectivity performance