Abstract. The Banggai cardinalfish Pterapogon kauderni is a species of national and international conservation concern. Established in November 2019, the Banggai marine protected area (MPA) in Central Sulawesi, Indonesia covers most of the endemic range of this ornamental fish. The third repeat survey (T2 monitoring) under the National Action Plan for Banggai Cardinalfish Conservation (NAP-BCFC) was carried out in October 2019 at eight sites in the Bokan Kepulauan region within the MPA. The T2 monitoring used the standard NAP-BCFC belt transect method. Data were collected on P. kauderni abundance (by size class: recruits, juveniles, adults) and microhabitat (sea urchins, sea anemones, hard corals, and others). Data were evaluated with respect to the T0 (2017) survey and T1 (2018) monitoring at the same sites, as well as previous surveys in 2004 (2 sites) and 2012 (4 sites). The data show wide between-site variation in P. kauderni and microhabitat parameters, with one subpopulation at very high risk of extirpation. Trends included declines over time in P. kauderni, sea urchin and sea anemone abundance, with an increase since 2017 in hard coral microhabitat use by adult P. kauderni. We recommend evaluation of other P. kauderni populations in Bokan Kepulauan and specific site or zone-based actions. However, we conclude that the most urgent priority for P. kauderni conservation in Bokan Kepulauan is protection of key microhabitat through a moratorium on sea urchin and sea anemone collection in P. kauderni habitat. Keywords: Banggai cardinalfish, endangered species, marine conservation, microhabitat, monitoring, ornamental fishery, CITES
The purpose of this study is to determine the number of whale sharks that come or appear in Botubarani waters during the year of 2016 - 2017 and monitor the pattern of their live behavior in the amount of days. The monitoring methods used are by (1) using photo IDs to distinguish individual types of whale sharks, (2) monitoring by looking directly / visually and recording the occurrence of whale sharks written in the seasonal calendar system and (3) using acoustic-based technology, by installing 2 (two) units of acoustic receivers at a depth of 15 meters and installing 10 (ten) acoustic signal-transmitting markers on the Whale Sharks. The study was conducted in November 2016, May and November 2017. The number of individuals of whale shark that have been identified is 21 individuals of Whale Shark in total. While the live behavior patterns of Whale Sharks who are installed with acoustic transmitter tag says that whale shark measuring more than 3.5 meters come and stay for about 10 days in the waters of Botubarani. While the Whale Sharks less than 3.5 meters in size stay for about 1 - 7 days. The results of direct whale monitoring (visual) of the pattern of live behavior of Whale Shark in the number of days of emergence during the period November 2016 to November 2017 from the data obtained are: 17 days in November 2016, 2 days in January 2017, 14 day in February 2017, 8 days in March 2017, 28 days in May 2017, 21 days in June 2017 and 2 days in July. While Whale Sharks did not appear in Botubarani in December 2016, April 2017, August 2017, September 2017, October 2017 and November 2017. Keywords Whale Sharks, Photo IDs, Acoustic Bookmarks
Kajian tentang ukuran populasi ikan napoleon (Cheilinus undulatus) merupakan bagian dari upaya pengelolaan sumberdaya ikan rawan punah. Penelitian ikan napoleon dilaksanakan di perairan karang Kabupaten Buton (2014) dan Wakatobi (2016). Tujuan penelitian untuk mengidentifikasi kepadatan populasi napoleon dan distribusi frekuensi panjang ikan napoleon. Metode pengambilan data yang digunakan adalah Underwater Visual Census (UVC) dengan alat bantu GPS-ploating Kit sebagai penentu luas area sensus. Jumlah individu ikan napoleon yang ditemukan dalam satuan luas area sensus dihitung sebagai kepadatan. Hasil penelitian menunjukkan bahwa kepadatan ikan napoleon di Buton dan Wakatobi masing-masing 0,76 dan 0,93 individu /ha. Nilai kepadatan ikan napoleon masuk kategori kritis dengan tingkat kepadatan sedang. Ukuran ikan anakan napoleon cukup banyak di Buton (26 %) dan ukuran dewasa terbanyak (100 %) dijumpai di Wakatobi, yaitu antara 30 – 50 cm. Ukuran ini termasuk dalam ukuran terlarang panen. Assessing the population sizes of humphead warasse (Cheilinus undulatus) is vital to manage an endangered fish resource. This research aims to examine the population density and length distribution. This study was carried out at reef waters of Buton (2014) and Wakatobi (2016). A method used in data colection is underwater vicual census (UVC). The GPS-ploating Kid used as additional tool to record sensus areas. Results show that densities of humphead warasse in Buton and Wakatobi were 0.76 and 093 individual per hectar, respectively. The status was critical and a fair density level. In Buton domined by juvenile (15) valued about 26 %. While, in Wakatobi domined by larger size (30 to 50 cm). However, both size was forbidden for exploiding.
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