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griddap Subset tabledap Make A Graph wms files Title Summary FGDC ISO 19115 Info Background Info RSS Email Institution Dataset ID Trajectory - R4.x260.000.0073 - July2011ZooplanktonCounts - 88.48N, 29.53W - 2011-07-24 In Situ Ichthyoplankton Imaging System (ISIIS) images were collected during two different summers (2011 and 2016) to determine the distribution of large scyphomedusae on the northern Gulf of Mexico shelf and their diel variability. Two different towing methods were used. In 2011 we towed the ISIIS at 3 fixed depths (10, 25, and 35 m) to measure the horizontal patchiness of jellies and associated zooplankton, and we also performed tow-yos in the same area. In 2016, we deployed the ISIIS in tow-yo fashion during the day and night in shallower waters (~25 m deep). We also examined the association of larval/juvenile fishes with these large scyphomedusae, examining the oceanographic variables related to these associations. Sizes and angles of orientation for each medusa were also measured. For 2011 data, physical data acquired at 2 Hz. For 2016 data, physical data acquired at 6 Hz. Images acquired at ~16 Hz\n\ncdm_data_type = Trajectory\nVARIABLES:\ntrajectory (July2011ZooplanktonCounts)\ntime (seconds since 1970-01-01T00:00:00Z)\nlatitude (degrees_north)\nlongitude (degrees_east)\ndepth (m)\nsea_water_temperature (Temperature, degree_Celsius)\ndissolved_oxygen (ml l-1)\nchlorophyll_fluorescence (Chlorophyll_a Fluorescence raw, volts)\nirradiance (µEinstein cm-2)\nm3bin (horizontal distance in meters covered by 1 cubic meter of water sampled, m)\nchaeotgnaths (chaeotgnaths,arrow worms, individuals m3-1)\ncopepods (copepods, small crustaceans, individuals m3-1)\nctenophore (ctenophore,¬†¬†comb jellies, individuals m3-1)\ncumacean (cumacean,small marine crustaceans, individuals m3-1)\nfish (larval fish, individuals m3-1)\nhydromedusae (individuals m3-1)\nlobate_ctenophore (individuals m3-1)\nctenophore_with_tentacles (individuals m3-1)\n... (13 more variables)\n (external link) University of Georgia / Skidaway Institute of Oceanography R4_x260_000_0073_July2011ZooplanktonCounts

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