Still photos from dive 4850 taken by Justin Marshall(Photos_4850_jm) generated on Characterization of Benthic and Pelagic Habitats and Ecosystems (OE_2005_044); R/V Seward Johnson; August 23, 2005 to August 23, 2005; North Atlantic; Gulf of Mexico; Northern Gulf of Mexico : Operation Deep Scope 2005.
5600 U.S. Highway 1 North Fort Pierce FL USA 34946 physical 561--465-2400-x311 561--468-0757 firstname.lastname@example.org Harbor Branch Oceanographic Institution
Dive 4850 - Our tasks were to locate and collect 2 crustacean traps, hopefully using red illumination, to collect The Eye In The Sea (EITS) just before surfacing and to collect animals for the DeepScope projects.
During descent polarization measurements were taken using a modified video camera, this was possible to around 400ft where the sensitivity of the camera stopped. The bottom was initially sand and mud with sparse life such as echinoderms and galatheid crabs. Our tasks were to locate and collect 2 crustacean traps, hopefully using red illumination, to collect The Eye In The Sea (EITS) just before surfacing and to collect animals for the Deep Scope projects. Locating the traps and EITS was hard due to several rocky outcrops in the area which hid the pinger signal. Once found, the traps proved to be full of hagfish, in fact useful for an opportunistic project being conducted on their visual capability, so we switched to white light for recovery. After this 1/2 hr was left for collection and filming. Samples taken were one rock dwelling anemone and a gorgonian. On approach to EITS we noticed a large (2-3m) six-gill shark attracted to the bait on EITS and spent some time filming its behavior as it tried to locate the bait. Its approach was clearly almost 100% olfactory. EITS was recovered with some difficulty due to its placement near a rock which prevented front on closure of the arm. It sustained some damage that was easily repaired once on the surface.
To look into the ocean with new eyes, in order to provide a comprehensive characterization of the deep-sea benthic environment.Objectives:1. Continue unobtrusive observations with the Eye-in-the-Sea Camera2. Continue studies of ecological roles of fluorescence in marine organisms.3. Quantify the deep-sea environment as it is perceived by its inhabitants.4. Determine the role of polarized light receiption in the pelagic environment.5. Determine the extent of polarized light reception in deep-sea organisms.6. Determine adaptations in deep-sea benthic organisms for increased sensitivity to light.
Johnson-Sea-Link I (Submarine). Cruise (2005)
Seward Johnson (Ship). Cruise
Benthos Mexico, Gulf of.
Corals Habitat Mexico, Gulf of.
Deep-sea animals Mexico, Gulf of Observations.
Deep-sea ecology Mexico, Gulf of.
Deep-sea fishes Mexico, Gulf of Observations.
Underwater exploration Mexico, Gulf of.
Frank, Tamara, 1957- originator.
Marshall, Justin, contributor.
United States. Office of Ocean Exploration, sponsor, publisher.
National Coastal Data Development Center (U.S.), contributor.
Host Item Entry:
Operation Deep Scope 2005 (Collection)
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