Comparison of Two Sampling Methods for Estimating Zooplankton Densities in Fish Culture Ponds (open access)

Comparison of Two Sampling Methods for Estimating Zooplankton Densities in Fish Culture Ponds

Report discussing results of a study comparing selected zooplankton population densities estimated by pooling samples - from five locations in saltwater fish culture ponds with one sample collected from a single pond location.
Date: January 1986
Creator: Colura, Robert L. & Matlock, Gary C.
Object Type: Report
System: The Portal to Texas History
Tank (open access)

Tank

Patent for a tank that filters.
Date: January 23, 1917
Creator: Gartrell, Clifford E.
Object Type: Patent
System: The Portal to Texas History

P.L. 94-171 County Block Map (2010 Census): Brazoria County, Block 21

Parent map for Brazoria County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:15,000.
Date: January 11, 2011
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

P.L. 94-171 County Block Map (2010 Census): Brazoria County, Block 29

Parent map for Brazoria County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:15,000.
Date: January 11, 2011
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

P.L. 94-171 County Block Map (2010 Census): Brazoria County, Block 30

Parent map for Brazoria County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:15,000.
Date: January 11, 2011
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

P.L. 94-171 County Block Map (2010 Census): Brazoria County, Block 37

Parent map for Brazoria County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:15,000.
Date: January 11, 2011
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

P.L. 94-171 County Block Map (2010 Census): Brazoria County, Block 38

Parent map for Brazoria County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:15,000.
Date: January 11, 2011
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

P.L. 94-171 County Block Map (2010 Census): Brazoria County, Block 43

Parent map for Brazoria County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:15,000.
Date: January 11, 2011
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

P.L. 94-171 County Block Map (2010 Census): Brazoria County, Block 44

Parent map for Brazoria County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:15,000.
Date: January 11, 2011
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

P.L. 94-171 County Block Map (2010 Census): Brazoria County, Block 47

Parent map for Brazoria County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:15,000.
Date: January 11, 2011
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

P.L. 94-171 County Block Map (2010 Census): Brazoria County, Index

Index map for Brazoria County, Texas showing the distribution of census blocks and smaller inset areas for which the U.S. Census Bureau collected data. The plotted map scale is 1:138,173.
Date: January 11, 2011
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History