Dolphins Encountered in Kepulauan Seribu

Kepulauan Seribu has been considered as one of the dolphin migration routes. This is based on the number of reports from fishermen and communities in Kepulauan Seribu on the existence of cetacean. The purpose of this study was to assess the type, behavior, deployment location, and estimate the number of dolphins found in Kepulauan Seribu. Research was conducted on May 10^th to May 27^th , 2010 and 22^nd June to 3^th July 2010. Observations were made every day, except Friday, and started at 7:00 a.m. to 6:00 pm. Observation by boat was used in the research. Observation of the amount, type, and behavior of cetacean had been done visually. Based on research results, it can be concluded that the species of dolphins found in Kepulauan Seribu are Delphinus delphis, Pseudorca crassidens, Stenella longirostris, and Tursiops truncatus, with a total number of 145 individuals. Species of dolphins are most often found is T. truncatus, whereas the least common type is Delphinus delphis. In addition there are also calf and unidentified species. The location of the encounter with the dolphins most often occurs around Pulau Gosong Congkak (Karang Congkak) and Karang Lebar. Judging from the observed behavior, it can be said that Kepulauan Seribu is a foraging area and migration routes for cetacean. In addition, Kepulauan Seribu was also considered as nursery ground for calf.