Abstract:

This dataset contains Atlantic Bumper (Chloroscombrus chrysurus) diet, growth and condition data collected on the R/V Point Sur cruise PS17_02 (PTS03) in the northern Gulf of Mexico from 2016-07-24 to 2016-07-30. Atlantic Bumper larvae were collected using a Bedford Institute of Oceanography Net Environmental Sampling System (BIONESS) at several stations that were either fully normoxic or experiencing bottom hypoxia. The BIONESS (0.25 m2 opening), a depth-discrete sampler was fitted with 333-µm mesh nets and 202-µm mesh nets. The dataset includes larvae diet, growth and condition data that were analyzed using morphometric measurements as well as station data. Other related station data (e.g., sampling time, station locations, oceanographic observations, etc.), net data (e.g., depth bins), and CTD profiles (temperature, salinity, depth) for BIONESS tows collected during the same cruise are available under GRIDDC Unique Dataset Identifier (UDI): R4.x260.000:0003 (DOI: 10.7266/N74T6GQD).

Suggested Citation:

Hernandez, Frank, Angie Hoover, and Carla Culpepper. 2020. Atlantic Bumper (Chloroscombrus chrysurus) diet, growth and condition data collected on the R/V Point Sur cruise PS17_02 (PTS03) in the northern Gulf of Mexico from 2016-07-24 to 2016-07-30. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/31X69ZEB

Purpose:

To describe the station, field, and environmental conditions that were encountered during each BIONESS tow on the summer field campaign of CONCORDE (July 23 - July 30, 2016). The station and field information was recorded at the start and end of the station by field personnel on the vessel whereas the environmental data (temperature, salinity, and oxygen) were collected with a CTD (SBE-19+) mounted to the BIONESS system. Oxygen measurements were used to determine if the hypoxia was present in order to compare the diet, growth and condition of larval Atlantic Bumper found in fully normoxic water columns versus water columns experiencing bottom hypoxia.

Data Parameters and Units:

The file "GRIIDC_CONCORDE_Hoover_Chloroscombrus.xlsx" contains multiple worksheets and includes the following data: Station Coordinates Worksheet: Date [The date of each station used in zoo- and ichthyoplankton analyses, MM/DD/YYYY (UTC)]; Tow # [Unique BIONESS tow identifier]; Latitude and Longitude [The Latitude (N) and longitude (W) of each station used in zoo- and ichthyoplankton analyses, decimal degrees]. Station Data Worksheet: Date (UTC) [Date of sample collection in Coordinated Universal Time, MM/DD/YYYY (UTC)]; Tow # [Unique BIONESS tow identifier]; Station Type [Water column type (fully normoxic, or experiencing bottom hypoxia) where the sample was collected]; Depth (m) [Depth in meters of the water column at which the sample was collected]; Wind Speed [Wind speed recorded by research personnel while on station]; Wind Direction [Wind direction recorded by research personnel while on station]; Sea State [Sea state recorded by research personnel while on station]; and Weather State [Weather state recorded by research personnel while on station]. Diet Worksheet: Station Type [Water column type (fully normoxic, or experiencing bottom hypoxia) where the sample was collected]; Tow # [Unique BIONESS tow identifier]; Sample ID [Unique event/sample identifier]; Fish # [Individual larval Atlantic Bumper identifier]; and Diet Items [Number of prey items, including the total number found in the individual fish]. Growth Worksheet: Station Type [Water column type (fully normoxic, or experiencing bottom hypoxia) where the sample was collected]; Tow # [Unique BIONESS tow identifier]; Sample ID [Unique event/sample identifier]; Fish # [Individual larval Atlantic Bumper identifier]; Age (days) [The age of the individual as counted by daily otolith rings (days)]; Radius (µm) [The length of the otolith from the center to the edge (µm)]; and L3D (µm) [The average width of the last three full growth increments (µm)] Morphometric Worksheet: Station Type {Water column type (fully normoxic, or experiencing bottom hypoxia) where the sample was collected]; Tow # [Unique BIONESS tow identifier]; Sample ID [Unique event/sample identifier]; Fish # [Individual larval Atlantic Bumper identifier]; NL (mm) [Notochord length in millimeters]; DPF (mm) [Depth at pectoral fin in millimeters]; DA (mm) [Depth at anus in millimeters]; HL (mm) [Head length in millimeters]; HH (mm) [Head height in millimeters]; ED (mm) [Eye diameter in millimeters]; and LJL (mm) [Lower jaw length in millimeters]. The file "GRIIDC_Cruise_Data_Documentation_Hoover_2" is the cruise documentation with the cruise information for the R/V Point Sur cruise PS17_02 (CONCORDE cruise PTS03) led by chief scientist Dr Christian Briseño-Avena.

Methods:

Zoo- and ichthyoplankton were collected obliquely with a BIONESS. Diet of larval Atlantic Bumper was identified and enumerated via stomach content. Growth of larval Atlantic Bumper was calculated as recent growth, or the average width of the last three full growth increments of the otolith. Condition of larval Atlantic Bumper was calculated by morphometric analyses using various measurements of the body.

Individual Files: