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- W2143407648 abstract "A 15-mo study was initiated in July 1972 to demonstrate the potential of using satellite-acquired environmental data to provide fisheries information. Imagery from ERTS-l (Earth Resources Tech nology Satellite) was used in conjunction with aerial photographically sensed menhaden distribution information, sea-truth oceanographic measurements, and commercial fishing information from a 8,670-km' study area in the north central portion of the Gulf of Mexico. Objectives were to demon strate relationships between selected oceanographic parameters and menhaden distribution, ERTS-l imagery and menhaden distribution, and ERTS-l imagery and oceanographic parameters. ERTS-l, MSS Band 5 imagery density levels correlated with photographically-detected menhaden distribution patterns and could be explained based on sea-truth secchi disc transparency and water-depth mea surements. These two parameters, together with surface salinity, Forel-Ule color, and chlorophyll a, also were found to correlate significantly with menhaden distribution. Eight empirical models were developed which provided menhaden distribution predictions for the study area based on combinations of secchi disc transparency, water depth, surface salinity, and Forel-Ule color measurements. A need of managers and users alike of living marine resources is timely synoptic information about the distribution and abundance of the re sources. For users, this need is particularly criti cal in that daily decisions must be made about where to deploy fishing vessels and less frequent decisions about investment strategies for men and equipment. The increasing pressures placed on living marine resources by domestic and foreign fishing fleets interacting with environmental changes demand that resource managers also be kept fully aware of the current status of the stocks to prevent possible catastrophic fluc tuations in specific fish populations. Unfortu nately, the tools required to satisfy this need economically are lacking, forcing users to base decisions on inituition and often biased personal knowledge and resource managers to formulate recommendations based on historical rather than current information. In response to this need, a number of relatively new technologies are being examined by the National Marine Fisheries" @default.
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- W2143407648 date "1973-06-29" @default.
- W2143407648 modified "2023-09-24" @default.
- W2143407648 title "A summary of selected early results from the ERTS-1 menhaden experiment" @default.
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