The USCG Healy (WAGB-20) is the US academic research vessel supporting arctic research. The Healy... more The USCG Healy (WAGB-20) is the US academic research vessel supporting arctic research. The Healy's keel was laid at Avondale shipyard in 1996. An extensive science evaluation coordinated by the UNOLS Office was conducted in 2000. The first science legs were conducted in 2001 and the status of the Healy was reported by Swift et. al (2002) in EOS. Since then the UNOLS Arctic Icebreaker Coordinating Committee has worked with the Coast Guard, the ship, the National Science Foundation and the user community to encourage a number of significant improvements which have been made to the vessel including substantial upgrades to the science data acquisition and logging system, installation of a significantly improved science seawater system, installation of a dual frequency echo sounder with swept (Chirp) subbottom capability replacement of the 300 KHz ADCP with a 75 KHz broad band ADCP, substantial upgrades to the ship's satellite data receiving system and numerous communication sys...
Population densities and recruitment of Diadema antillarum were monitored on reefs of the Florida... more Population densities and recruitment of Diadema antillarum were monitored on reefs of the Florida Keys beginning in 1990/1991. Signs of a mortality event, with symptoms similar to the 1983/1984 mass mortality, were first observed at off shore reefs near the Middle Keys in January/February 1991. The mortality event occurred on the offshore reefs off Key West in April 1991, reducing densities, which ranged from 0.02-0.60·m−2, by 97%. Size frequency distribution shifted from one dominated by large individuals to one dominated by small recruits. Between fall of 1991 and fall of 1992, abundance declined by 83% at a patch reef offshore of Long Key. The cause of this decline was unknown. During 1991 and 1992, densities on spur and groove reefs at Sombrero Key Reef, near the Middle Keys, and Molasses Reef, near the Upper Keys were less than 0.01·m−2. Settlement on the reef-flat at Molasses Reef was higher in 1991 than 1992. The settlement that occurred at Molasses Reef in 1991 was also dete...
The USCG Healy (WAGB-20) is the US academic research vessel supporting Arctic research. Healy has... more The USCG Healy (WAGB-20) is the US academic research vessel supporting Arctic research. Healy has supported a dozen science programs in the Arctic starting in the boreal summer of 2001 with a cruise to the Gakkel Ridge. Significant upgrades were implemented prior to the 2004 Arctic field season including a significantly improved science seawater system, enhancements to computer infrastructure, installation of a POS/MV-320 GPS aided inertial navigation and attitude sensor and installation of an Iridium-based email system. Upgrades prior to the 2005 field season included installation of substantially improved four-channel, load equalizing Iridium network connection, and installation of a prototype watchstander workstation. The enhanced Iridium system provides reliable, fast-turnaround email even when operating at the highest latitudes. The watchstander workstation provides an ergonomic arrangement for underway watchstanders, significantly improved displays and new software linking a r...
Journal of Experimental Marine Biology and Ecology, 1988
ABSTRACT The short-term storage and synthetic capacities of the gut tissues of Lytechninus varieg... more ABSTRACT The short-term storage and synthetic capacities of the gut tissues of Lytechninus variegatus (Lamarck) were estimated by measuring the level and content of nucleic acids. The mean gut index of individuals fed ad libitum for 24 days was 2.6-fold higher than that of individuals starved for the same period. The mean concentration of DNA was 1.3-fold lower and the mean total DNA was 2.3-fold higher in the gut tissue of fed individuals than in starved individuals. The mean concentrations of RNA in the gut tissue were similar in fed and in starved individuals. Mean RNA: DNA ratios in the gut tissues were 2.2 in fed individuals and 1.5 in starved individuals. Changes in the size of the gut during feeding and starvation are the result of changes in cell number and in cell size. Feeding increases the synthetic capacity (RNA: DNA) of the gut tissue. The gut tissues of L. variegatus seem to function as short term nutrient storage organs, relying on both changes in cell number and changes in cell size to sequester and to mobilize nutrients.
Page 1. BULLETIN OF MARINE SCIENCE. 54(3): 1059-1071. 1994 A LONG-TERM INTERDISCIPLINARY STUDY OF... more Page 1. BULLETIN OF MARINE SCIENCE. 54(3): 1059-1071. 1994 A LONG-TERM INTERDISCIPLINARY STUDY OF THE FLORIDA KEYS SEASCAPE John C. Ogden, James W. Porter, Ned P. Smith, Alina M. Szmant, Walter C. Jaap and David Forcucci ...
Page 1. BULLETIN OF MARINE SCIENCE, 54(3): 805-818, 1994 POPULATION DYNAMICS OF JUVENILE CARmBEAN... more Page 1. BULLETIN OF MARINE SCIENCE, 54(3): 805-818, 1994 POPULATION DYNAMICS OF JUVENILE CARmBEAN SPINY LOBSTER, PANULIRUS ARGUS, IN FLORIDA BAY, FLORIDA David Forcucci, Mark J. Butler, N and John H. Hunt ...
This best practice document was developed under the Rolling Deck to Repository project by a small... more This best practice document was developed under the Rolling Deck to Repository project by a small working group comprised of the document authors. These recommendations are specifically for transmissometers installed within a research vessel's (RVs) scientific flow-through sea water (underway) system. They are not focused on transmissometers used for CTD/Rosette casts, though some information may be applicable. All underway transmissometers in the academic research fleet presently are WET Labs (henceforth Sea-Bird) C-Stars. Review of available sensors shows this will continue to be the most available and adaptive device. The Goal of this document is to provide best practices for operators that will improve access to transmissometer data and metadata to support routine data quality evaluation and science application.
The USCG Healy (WAGB-20) is the US academic research vessel supporting arctic research. The Healy... more The USCG Healy (WAGB-20) is the US academic research vessel supporting arctic research. The Healy's keel was laid at Avondale shipyard in 1996. An extensive science evaluation coordinated by the UNOLS Office was conducted in 2000. The first science legs were conducted in 2001 and the status of the Healy was reported by Swift et. al (2002) in EOS. Since then the UNOLS Arctic Icebreaker Coordinating Committee has worked with the Coast Guard, the ship, the National Science Foundation and the user community to encourage a number of significant improvements which have been made to the vessel including substantial upgrades to the science data acquisition and logging system, installation of a significantly improved science seawater system, installation of a dual frequency echo sounder with swept (Chirp) subbottom capability replacement of the 300 KHz ADCP with a 75 KHz broad band ADCP, substantial upgrades to the ship's satellite data receiving system and numerous communication sys...
Population densities and recruitment of Diadema antillarum were monitored on reefs of the Florida... more Population densities and recruitment of Diadema antillarum were monitored on reefs of the Florida Keys beginning in 1990/1991. Signs of a mortality event, with symptoms similar to the 1983/1984 mass mortality, were first observed at off shore reefs near the Middle Keys in January/February 1991. The mortality event occurred on the offshore reefs off Key West in April 1991, reducing densities, which ranged from 0.02-0.60·m−2, by 97%. Size frequency distribution shifted from one dominated by large individuals to one dominated by small recruits. Between fall of 1991 and fall of 1992, abundance declined by 83% at a patch reef offshore of Long Key. The cause of this decline was unknown. During 1991 and 1992, densities on spur and groove reefs at Sombrero Key Reef, near the Middle Keys, and Molasses Reef, near the Upper Keys were less than 0.01·m−2. Settlement on the reef-flat at Molasses Reef was higher in 1991 than 1992. The settlement that occurred at Molasses Reef in 1991 was also dete...
The USCG Healy (WAGB-20) is the US academic research vessel supporting Arctic research. Healy has... more The USCG Healy (WAGB-20) is the US academic research vessel supporting Arctic research. Healy has supported a dozen science programs in the Arctic starting in the boreal summer of 2001 with a cruise to the Gakkel Ridge. Significant upgrades were implemented prior to the 2004 Arctic field season including a significantly improved science seawater system, enhancements to computer infrastructure, installation of a POS/MV-320 GPS aided inertial navigation and attitude sensor and installation of an Iridium-based email system. Upgrades prior to the 2005 field season included installation of substantially improved four-channel, load equalizing Iridium network connection, and installation of a prototype watchstander workstation. The enhanced Iridium system provides reliable, fast-turnaround email even when operating at the highest latitudes. The watchstander workstation provides an ergonomic arrangement for underway watchstanders, significantly improved displays and new software linking a r...
Journal of Experimental Marine Biology and Ecology, 1988
ABSTRACT The short-term storage and synthetic capacities of the gut tissues of Lytechninus varieg... more ABSTRACT The short-term storage and synthetic capacities of the gut tissues of Lytechninus variegatus (Lamarck) were estimated by measuring the level and content of nucleic acids. The mean gut index of individuals fed ad libitum for 24 days was 2.6-fold higher than that of individuals starved for the same period. The mean concentration of DNA was 1.3-fold lower and the mean total DNA was 2.3-fold higher in the gut tissue of fed individuals than in starved individuals. The mean concentrations of RNA in the gut tissue were similar in fed and in starved individuals. Mean RNA: DNA ratios in the gut tissues were 2.2 in fed individuals and 1.5 in starved individuals. Changes in the size of the gut during feeding and starvation are the result of changes in cell number and in cell size. Feeding increases the synthetic capacity (RNA: DNA) of the gut tissue. The gut tissues of L. variegatus seem to function as short term nutrient storage organs, relying on both changes in cell number and changes in cell size to sequester and to mobilize nutrients.
Page 1. BULLETIN OF MARINE SCIENCE. 54(3): 1059-1071. 1994 A LONG-TERM INTERDISCIPLINARY STUDY OF... more Page 1. BULLETIN OF MARINE SCIENCE. 54(3): 1059-1071. 1994 A LONG-TERM INTERDISCIPLINARY STUDY OF THE FLORIDA KEYS SEASCAPE John C. Ogden, James W. Porter, Ned P. Smith, Alina M. Szmant, Walter C. Jaap and David Forcucci ...
Page 1. BULLETIN OF MARINE SCIENCE, 54(3): 805-818, 1994 POPULATION DYNAMICS OF JUVENILE CARmBEAN... more Page 1. BULLETIN OF MARINE SCIENCE, 54(3): 805-818, 1994 POPULATION DYNAMICS OF JUVENILE CARmBEAN SPINY LOBSTER, PANULIRUS ARGUS, IN FLORIDA BAY, FLORIDA David Forcucci, Mark J. Butler, N and John H. Hunt ...
This best practice document was developed under the Rolling Deck to Repository project by a small... more This best practice document was developed under the Rolling Deck to Repository project by a small working group comprised of the document authors. These recommendations are specifically for transmissometers installed within a research vessel's (RVs) scientific flow-through sea water (underway) system. They are not focused on transmissometers used for CTD/Rosette casts, though some information may be applicable. All underway transmissometers in the academic research fleet presently are WET Labs (henceforth Sea-Bird) C-Stars. Review of available sensors shows this will continue to be the most available and adaptive device. The Goal of this document is to provide best practices for operators that will improve access to transmissometer data and metadata to support routine data quality evaluation and science application.
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