Age structure and seasonal movement of Atlantic sturgeon (Acipenser oxyrinchus) aggregating in eastern Long Island Sound and the Connecticut River: Supplementary Figure 1

Supplementary Figure 1. (A)Picture of a whole pectoral fin spine (~20 cm) of an Atlantic sturgeon (Acipenser oxyrinchus), with red lines indicating where sections were taken from the fish (this example of a full fin spine came from a reported mortality).(B) Example of a fin spine section from a fish estimated to be 11 years old, with annuli marked by red dots (red dashed lines indicate annuli widths).(C) Example of a fin spine section with inclusions in both lobes (indicated by red arrows).Inclusions, which are secondary fin rays that get absorbed in the lobes of the primary spine, precluded annuli measurements.