منابع مشابه
Marine and Coastal Fisheries
—The ability of fish to submerge after discarding is often used as a proxy for survival, but this practice underestimates total discard mortality because delayed mortality is overlooked. Fishery managers need a way to link ‘‘sink or swim’’ indicators, or variables observed during capture and release, with delayed mortality rates. We conducted a cage study of red snapper Lutjanus campechanus off...
متن کاملMarine and Coastal Fisheries
Pop-up satellite archival tags (n = 31) were deployed on Yellowfin Tuna Thunnus albacares in the Gulf of Mexico for periods ranging from 14 to 95 d. Differences in diel vertical behavior were assessed by comparing time spent at temperature relative to the surface temperature ( T). Pooled samples revealed that 31% of darkness hours, 20% of twilight hours, and 12% of daylight hours were spent in ...
متن کاملDiscriminating mesozooplankton communities in Bushehr marine coastal ecosystems- Persian Gulf
Coastal ecosystems of Bushehr are shallow environments subject to human impacts, including shrimp aquaculture and urban expansion activities. A spatial-temporal study was conducted in order to assess the actual ecological status of the creeks, estuary and marine sites on the basis of their taxonomic composition and density of mesozooplankton. Zooplankton species distribution and abundance data ...
متن کاملMarine and Coastal Applications of Sar
ith Radarsat-1 presently in operation and Radarsat-2 approved, Canada is starting to develop synthetic aperture radar (SAR) applications that require imagery on an operational schedule. Sea ice surveillance is now a proven near–real-time application, and new marine and coastal roles for SAR imagery are emerging. Although some image quality and calibration issues remain to be addressed, ship det...
متن کاملRemote Sensing for Marine and Coastal Environments
A scanning lidar system provides high-resolution two-dimensional measurements of ocean wave displacement. The airborne operation further enhances the speed of data acquisition. These properties allow rapid characterization of the ocean wave environment. In addition to active ranging, the scanning optics can obtain passive measurements of surface emissivity, yielding a digital image of the surfa...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2002
ISSN: 0096-3941
DOI: 10.1029/eo083i012p00130-04