Dolphin sighting throughout the pile-putting process in Makassar Bay, East Kalimantan, Indonesia

¹ Research Center for Conservation of Marine and Inland Water Resources, National Innovation Research Agency, Jalan Raya Jakarta-Bogor Km. 48, Cibinong, Bogor, 16911 West Java, Indonesia
² Engineering, Borneo Institute of Technology, Jl. Soekarno-Hatta Km. 15 Karang Joang, Balikpapan East Kalimantan 76127, Indonesia
³ Yayasan Konservasi Alam Nusantara, Jl. M. Sabaat Liliba, Oebobo Distrik, Kupang City, 85228 East Nusa Tenggara, Indonesia

^* Corresponding author: muji019@brin.go.id

Abstract

This survey is part of the installation of Tripod Jackets in Makassar Bay, targeting the North Side, North Nubi and Jumelai, PT Pertamina Hulu Mahakam in East Kalimantan waters. This study aims to provide marine mammal observation to the JSN project. Expert help is essential because it complies with the International Maritime Organization MEPC.1/circ.833 rules. From 13th April to 2nd June 2021, observations were made using visual and passive acoustic methods (SQ26: H1 recorder). The visual observation focus was from 500 meters to 1000 meters. The team found that the dolphins that appeared were bottlenose, long-beaked, and dolphins were not identified. The highest prevalence was during the pilling of 12 dolphins at JML 1 site (after the GTS installation and adjustment). Long-beaked and unidentified dolphins were found in WPN 4 location. The dolphins seen were Tursiops species, while the turtles seen were green turtles. When watching dolphins, sightings occurred mainly at night. In the next task, the collection process, we want to discuss the process that produces a high sound on the water’s surface. We recommend using “early warning”. The warning will be done after the routine inventory, and we hope the staff can do it three times.