Introduction 
Study area and methods 
Station description and environmental data 
Relative abundance 
Comparison between canal, marsh, and bay 
Discussion 
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CONTENTS 
Figures 
Study area and sampling locations in the Jamaica Beach area of West Bay, Texas .......... 
Sand, silt, and clay fractions of the sediments by station and zone ...................-005- 
Average volumes of organic matter (cord grass roots, submerged marine grasses, and organic 
detritus combined) by station and zone, March-October 1969 ............. 0.0000 ee ee eee 
Average volume of organic matter by date, station, and zone ................. eee eeeeeeeee 
Average dissolved oxygen by date for all six stations combined and for the stations having 
theshishesiwandulowestgaveracenvalllc summer tars eaceistcic errs kicieiskec iin ocfeectere esters oii 
Average numbers and volumes (stations combined) of organisms caught per sample by 
taxonomic.eroupiandy zone) March-October O69 i lies yarcisverapst dei ree casieveheve) #1 ais. snersie eis ensauele 
Average number of polychaetes caught per sample by date, station, and zone .............. 
Average number of crustaceans caught per sample by date, station, and zone .............. 
Average number of pelecypods caught per sample by date, station, and zone ............... 
Average number of nemerteans caught per sample by date, station, and zone............... 
Average numbers and volumes of benthic macroinvertebrates caught per sample by area, 
taxonomic group, and for the groups combined, March-October 1969 ................---. 
Tables 
List of taxonomic groups and total numbers of specimens collected by station and zone ..... 
Comparisons between zones by taxon and station of the mean numbers of organisms col- 
lectedk(pained=comparisoni/-test) nner eer ORO EGC GORE CR ne toner 
Comparison between stations by taxon and zone of the mean numbers of organisms collected 
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Appendix Tables 
Numbers of animals caught by station, date, taxon, and volume of two samples in shore 
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Numbers of animals caught by station, date, taxon, and volume of two samples in 
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