Wednesday, February 08, 2017Register
 Texas Coastal Fisheries Mapping Application

Texas Coastal Fisheries Bay MapSabine LakeMatagorda BaySan Antonio BayAransas BayCorpus Christi BayUpper Laguna MadreLower Laguna MadreGalveston Bay


About the Data

The Texas Parks and Wildlife Department (TPWD) utilizes several sampling gears for fisheries-independent monitoring of finfish and shellfish communities. They include: 1) bag seines for collecting smaller organisms in near shore environments; 2) trawls for collecting organisms found on or near the open bay bottoms; 3) gill nets for catching larger fish near shore; and 4) oyster dredges for sampling the oyster reef community (data not included in this mapping application). The data generated by TPWD are some of the best coastal fisheries data in the United States. Not only does TPWD use multiple gears in a random sampling protocol, they identify (to the lowest taxonomic unit possible) and count everything that they collect.

Collected data include spatial and temporal information describing the sample location and time, collection gear information, hydrological data (e.g. dissolved oxygen, water temperature, and salinity), weather conditions, species caught, and number of each species captured. Data are displayed here in terms of relative abundance (RA), calculated as the catch of a particular species in a sample divided by the total number of animals captured in that sample.

Fisheries independent data for selected species found in Texas' eight major bay systems and associated subbays can be viewed in the associated mapping application:
1. Sabine-Neches Estuary (Sabine Lake)
2. Trinity-San Jacinto Estuary (Galveston Bay)
3. Lavaca-Colorado Estuary (Matagorda Bay)
4. Guadalupe Estuary (San Antonio Bay)
5. Mission-Aransas Estuary (Aransas Bay)
6. Nueces Estuary (Corpus Christi Bay)
7. Upper Laguna Madre Estuary (Upper Laguna Madre)
8. Lower Laguna Madre Estuary (Lower Laguna Madre)


 How to Use

NOTE: To view a sublayer, the corresponding parent layer must also be selected.   

When viewing hydrological parameter layers (salinity, temperature, dissolved oxygen, or turbidity), only one layer can be selected at a time.

Plus symbols and downward arrows indicate that more information is available. Please click on them to expand the information.

Select a bay system from the main portal to launch a bay mapping application.

STEP 2: Select a gear type and species of interest in the mapping application to view the spatial distribution of the species. An expandable list allows the user to view relative abundance data by sampling stations or by average across sampling grids. Other selection choices include data sampled across all years or by season.

STEP 3: Select a hydrological parameter of interest (salinity, temperature, dissolved oxygen, turbidity) and expand the list to choose seasonal averages by grid.  

STEP 4: View population trend graphs for selected species that inhabit Texas bays.

STEP 5: Download the data in Excel format by choosing the bay system and gear type of interest.

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