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Subject 1: (Interview). Subtitle: Page Valentine. Timecode In: 00:01:53. Timecode out: 00:30:46. Notes: Seabed mapping; Benthic habitats. Subject 2: White-collared Manakin (Manacus candei). Timecode In: Unknown. Timecode out: Unknown. Subject 3: Dusky-capped Flycatcher (Myiarchus tuberculifer). Timecode In: Unknown. Timecode out: Unknown. Subject 4: Northern Bentbill (Oncostoma cinereigulare). Timecode In: Unknown. Timecode out: Unknown. Equipment Notes: Stereo=1; Decoded MS stereo; Sennheiser MKH40 Cardioid Mid Mic and MKH30 Bidirectional Side Mic through Sonosax Preamp into Sony TCD3. NPR/NGS RADIO EXPEDITIONS Stellwagen Bank NMS Log-DAT 8 Anthony Brooks interview with Page Valentine 3pm M/S pair NG 00:36 -bg ambi on ship - 1 : 14 PV (?) ( a bit faint, a low hum of engine in bg) this is the area we are mapping. Cape Cod is right here off the map -Cape Ann. TB -uhhuh. 1:53 PV -I am Page Valentine I am with the US Geological Survey in Woods Hole, MA. We have a laboratory devoted to coastal and marine research there. At present we are working in Stellwagen Bank National Marine Sanctuary conducting the mapping of the sea bed and this image here shows you the entire area that we are mapping which includes an area that is somewhat bigger than the Sanctuary. We decided to square it off and do this whole area here. It is about 1100 square nautical miles. 2:32 This area has been completed. And we are using a sonar system mounted on a research vessel that's especially designed to do high speed surveys of the sea floor using a multi-beam sonar system so that we are looking at a -not at a single point as we go along but rather at a swath of the sea floor. And with it the swath is dependent on the water depth so we can image a path across the sea floor about 5 times the water depth. So in a hundred meters of water we can do 500 meters or half a kilometer swath with each pass (path?). So it is just a matter of surveying the entire area and then the sonar info gives us 2 products. One is the depth to the seabed which translates to a bathymetric map or a topographic map. Shows us all the features of the sea bed. And the other use of that data is to show us the nature of the sea floor based on the strength of the sound return. So the sound will come back stronger from hard seabed gravel, boulders, out cropping rocks, and have a weaker return from the mud bottoms. So in this image the mud bottoms are dark, or black. And the (radio chatter) rocky or sandy bottoms are grays -shades of gray or white. So we use both of these products, the topography and the back-scatter to help us make interpretive maps of the sea bed. And we also contour the depth data so we are going to have a new set of highly detailed bathymetric contour maps. 4:34 4:35 TB (radio chatter in bg) Did this kind of mapping exist before this project or is this - PV -In this area? TB -yeah- PG -no this is this the first time this area has been mapped and this detailed. And we hope it will be the basis for future scientific research and for management -making management decisions regarding the Sanctuary. So we feel like if you don't know what the environments are like, what their distributions are, what sort of organisms are living and what kinds of bottom types than you really can't conduct research or management in a useful way. 5: 18 5: 19 TB -So what kind of decisions can be made, what kind of management decisions can be made and management policy set using this kind of map. 5:30 PV -well, with regard to this Sanctuary the marine mammals, the whales are an important aspect of it. And so they are interested in where they are feeding, what sorts of bottom types they are feeding on. Where there prey is located. What their prey feeds on. There are certain areas of higher whale activity than others and it is important to know why the... (Notes truncated)
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