Correlation Between Existence of Reef Sharks with Abundance of Reef Fishes in South Waters of Morotai Island (North Moluccas)

2nd International Conference on Applied Marine Science and Fisheries Technology 2017

地球科学;农业科学

Mukharror, Darmawan Ahmad^1 ; Baiti, Isnaini Tiara^2 ; Ichsan, Muhammad^1 ; Pridina, Niomi^1 ; Triutami, Sanny^1

Shark Diving Indonesia Morotai, Kampung Yayasan, Daruba, Morotai, Indonesia^1

Marine Science Department, FPIK, Universitas Padjdjaran, Jl. Raya Bandung-Sumedang KM 21, Bandung, Indonesia^2

关键词: Academic research;    Coefficient of determination;    Correlation value;    Positive correlations;    Reef fishes;    Southern waters;    Visual census;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/89/1/012006/pdf
DOI  :  10.1088/1755-1315/89/1/012006

学科分类：农业科学（综合）

来源: IOP

【 摘 要 】

Despite increasing academic research citation on biology, abundance, and the behavior of the blacktip reef sharks, the influence of reef fish population on the density of reef sharks: Carcharhinus melanopterus and Triaenodon obesus population in its habitat were largely unassessed. This present study examined the correlation between abundance of reef fishes family/species with the population of reef sharks in Southern Waters of Morotai Island. The existence of reef sharks was measured with the Audible Stationary Count (ASC) methods and the abundance of reef fishes was surveyed using Underwater Visual Census (UVC) combined with Diver Operated Video (DOV) census. The coefficient of Determination (R2) was used to investigate the degree of relationships between sharks and the specific reef fishes species. The research from 8thApril to 4thJune 2015 showed the strong positive correlations between the existence of reef sharks with abundance of reef fishes. The correlation values between Carcharhinus melanopterus/Triaenodon obesus with Chaetodon auriga was 0.9405, blacktip/whitetip reef sharks versus Ctenochaetus striatus was 0.9146, and Carcharhinus melanopterus/Triaenodon obesus to Chaetodon kleinii was 0.8440. As the shark can be worth more alive for shark diving tourism than dead in a fish market, the abundance of these reef fishes was important as an early indication parameter of shark existence in South Water of Morotai Island. In the long term, this highlights the importance of reef fishes abundance management in Morotai Island's Waters to enable the establishment of appropriate and effective reef sharks conservation.