. Bulletin. Science. -111 °50' SOUTHERN CALIFORNIA ACADEMY OF SCIENCES -111°40'. â 111°50' â 111°30' Fig. 2. Bathymetry profile of Bahia Almejas and surrounding regions, including location of sediment samples. Isobath values are listed in meters. additional references. Mexican colleagues from CICIMAR, the Instituto Nacional de la Pesca, and the Centro de Investigation Cientifica y Education Superior de Ensenada were also contacted to obtain supplemental literature that may have been overlooked during previous searches, especially unpublished Mexican theses. Pertinent literature was accumul
. Bulletin. Science. -111 °50' SOUTHERN CALIFORNIA ACADEMY OF SCIENCES -111°40'. â 111°50' â 111°30' Fig. 2. Bathymetry profile of Bahia Almejas and surrounding regions, including location of sediment samples. Isobath values are listed in meters. additional references. Mexican colleagues from CICIMAR, the Instituto Nacional de la Pesca, and the Centro de Investigation Cientifica y Education Superior de Ensenada were also contacted to obtain supplemental literature that may have been overlooked during previous searches, especially unpublished Mexican theses. Pertinent literature was accumulated and examined, regardless of publication language. Abstracts from conference proceedings were used when peer-reviewed publications were unavailable. Personal observations made primarily in Bahia Almejas during summer months (June- August) from 1998-2002 were incorporated as deemed appropriate. Geographic Information Systems technology, specifically ArcView® and ArcGIS® software, was used to determine surface area of the three BMLC regions (, Zona de Canales, Bahia Magdalena, and Bahia Almejas) and depth zonation within Bahia Almejas (Environmental Systems Research Institute 2002a, b). A 1998 nautical chart produced by the National Imagery and Mapping Agency (NIMA) was scanned and georeferenced to create a derivative digital file. Bathymetry contours were digitally transcribed from this file in ArcView® to create contour polygons at 10 m intervals for Bahia Almejas and at 20 m for the adjacent offshore region. Spatial analysis was then performed to estimate depth-specific area within Bahia Almejas. Similarly, distinct polygons were created for each BMLC region using the Mexican states shapefile available from ArcGIS® and subsequently used to estimate region-specific area. Sediment samples were collected in Bahia Almejas on 22 and 23 August 1999. Thirty sampling locations were randomly selected and were then grouped based on relative proxim
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