Hurricane Mitch: Population Genetic Structure of Pacific White Shrimp from the Gulf of Fonseca, Honduras

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Tables Table 1. Sample sizes before and after the exclusion of genetic outliers for collection sites by estuary and site within estuary. Table 2. Analysis of Molecular Variance (AMOVA), based on 87 AFLP markers, for Litopenaeus vannamei populations collected from multiple estuaries adjoining the Gulf of Fonseca, Honduras: a) Nested AMOVA for complete data set consisting of 189 postlarval shrimp from 16 estuaries and 19 collection sites. b) Results from reduced data set (N = 144) consisting of only the 18 collection sites with a core group of three or more genetically similar postlarvae. Table 3. Matrix of pairwise fixation indexes and their probablities for Litopenaeus vannamei compared among estuaries (N = 18) adjoining the Gulf of Fonseca, Honduras, following the exclusion of genetic outliers. F-statistics are given below the diagonal; p-values, above the diagonal. 4 Figures Fig. 1. Map of the the Gulf of Fonseca, Honduras, showing the 19 collection sites for Litopenaeus vannamei postlarvae for which data are reported. Colored (non-black) ovals encircle 4 distinct phenetic clusters, three of which display disjunct distributions spanning multiple lobes of the Gulf (blow-up boxes). Black ovals encircle collection sites that were genetically distinct from all others. Shrimp farms are represented by blue-filled boxes. All collections were conducted within a tetrahedral area with intersections at the following coordinates (proceeding clockwise from the southwestern extreme): north