Diversity and abundance of sharks in no-take and fished sites in the marine protected area network of Raja Ampat, West Papua, Indonesia, using baited remote underwater video (BRUVs)
Beer, Angela June Elize
MetadataShow full item record
Subjectcoral reef; depth distribution; fishing impacts; marine conservation; marine reserves (MPA); Sharks (Elasmobranch)
Sharks are essential elements for healthy marine ecosystems and require conservation. A new law has been passed for their protection in Raja Ampat, Indonesia, yet there is a lack of knowledge about their current status in the region. This research quantifies diversity and abundance of shark populations in two areas (Penemu and Dampier Straight) within Raja Ampat, and provides a comprehensive baseline for the areas to evaluate management strategies. Baited remote underwater video systems were used to survey shark populations in no-take and fished sites, across a 3 to 80 m depth gradient. Overall, nine species of sharks from five families were recorded; Carcharhinus melanopterus was the most abundant species. PERMANOVA analysis showed no statistical difference between areas nor zoning status; likely due to the relatively recent designation of the Marine Protected Areas (MPAs) and inconsistent management/enforcement. Greater shark abundance overall was recorded in Penemu than in Dampier Strait, whereas Dampier exhibited greater diversity of species. Penemu also showed a greater difference in shark abundance between the fished and no-take zones, with more sharks in fishing-prohibited no-take zones. Over the depth gradient studied, there was an inverse trend for species richness and abundance, with the greatest shark abundance in shallow samples, whereas the greatest shark diversity was at depth. These results provide important knowledge on the distribution of these valuable, yet poorly understood, apex predators in Raja Ampat, West Papua. Furthermore the findings and protocols developed in this study will benefit the management planning of the Raja Ampat MPA network.
Showing items related by title, author, creator and subject.
Engaging professional mariners in marine mammal conservation Thorpe, Leah Irene (2012-05-16)Due to British Columbia‟s expansive coastline and limited funding for marine mammal conservation, research projects rely heavily on citizen scientists, or volunteers who contribute data. Professional mariners are an important ...
Planning on the edge: Development in Canada's East Coast marine environment Bishop, Mary (Canadian Institute of Planners, 1998-11)Marine-related development activities require environmental and socioeconomic impact assessments, as well as consultation with other stakeholders who share and use that environment. Major projects such as the PEI Fixed ...
[Pre-print] Mathematical model of marine protected areas Berezansky, Leonid; Idels, Lev; Kipnis, M. (Oxford University Press on behalf of the Institute of Mathematics and its Applications, 2011-04)We consider two regions with a fish population that is dispersing between the two areas, and fishing takes place only in region 2, with region 1 established as no-fishing zone. Marine protected areas (MPAs) have been ...