Name: Red Grouper - Commercial Catch - Fisheries-Dependent
Display Field: source_id
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Getis-Ord Gi* analysis of red grouper capture from observations recorded by NOAA Fisheries Service Galveston Laboratory Gulf of Mexico Reef Fish Observer Program 2007-2013 (7,201 sets made during 272 trips). Average capture summarized by 15 minute grid blocks. The ‘hot spot’, or Getis-Ord Gi* statistic, is used to detect clusters of high or low catch per unit effort (CPUE) values. In ArcGIS™, the ‘hot spot’ tool looks at the value of each feature in relation to the values for its neighboring features. A statistically significant Z-score results if the sum for a feature and its neighbors, when compared proportionally to the sum of all features, is different from what is expected. If a feature is surrounded by neighbors with similarly high (or low) values, then it is part of a statistically significant hot (or cold) spot.
Copyright Text: Jo A. Williams, Elizabeth Scott-Denton
Name: Red Snapper - Commercial Catch - Fisheries-Dependent
Display Field: source_id
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Getis-Ord Gi* analysis of kept and discarded red snapper capture from observations recorded by NOAA Fisheries Service Galveston Laboratory Gulf of Mexico Reef Fish Observer Program 2007-2013 (28,087 sets made during 731 trips). Average capture summarized by 15 minute grid blocks. The ‘hot spot’, or Getis-Ord Gi* statistic, is used to detect clusters of high or low catch per unit effort (CPUE) values. In ArcGIS™, the ‘hot spot’ tool looks at the value of each feature in relation to the values for its neighboring features.
Copyright Text: Jo A. Williams, Elizabeth Scott-Denton
Description: Getis-Ord Gi* analysis of kept and discarded vermilion snapper capture from observations recorded by NOAA Fisheries Service Galveston Laboratory Gulf of Mexico Reef Fish Observer Program 2007-2013 (28,087 sets made during 731 trips). Average capture summarized by 15 minute grid blocks. The ‘hot spot’, or Getis-Ord Gi* statistic, is used to detect clusters of high or low catch per unit effort (CPUE) values. In ArcGIS™, the ‘hot spot’ tool looks at the value of each feature in relation to the values for its neighboring features.
Copyright Text: Jo A. Williams, Elizabeth Scott-Denton