CONTENTS 



Page 



Report of the Director 1 



Staff 7 



Shrimp Fishery Program 10 



Spawning populations 13 



Larval distribution and abundance 18 



Currents on the continental shelf of the 



northwestern Gulf of Mexico 23 



Identification of shrimp larvae 28 



Abundance of juvenile shrimp 31 



Brown shrimp mortality studies 33 



Pink shrimp life history 35 



Industrial Fishery Program 38 



Industrial bottomfish fishery in the north 



central Gulf of Mexico 39 



Western Gulf bottomfish survey 42 



Estuarine Program 45 



Ecology of nursery areas 47 



Effects of engineering projects on estuaries 52 



Physiology and Behavior Program 55 



Tolerances to environmental factors 57 



Experinnental growth studies with postlarval brown shrimp. . . 6l 

 Use of anesthetics in metabolism studies 



with penaeid shrimps 63 



Special Reports 64 



Chemicals toxic to the red-tide organism 64 



Results of the Trinity Bay study 67 



The Colorado River -Matagorda Bay study 70 



Movement of water masses in Galveston Harbor 75 



Estuarine water observations during a 24-hour cycle 77 



Marking spiny lobsters, Panulirus argus, and blue 



crabs, Callinectes sapidus, with biological stains .... 83 



Small beam net for sampling postlarval shrimp 86 



The use of Atkins-type tags on shrimp 88 



Iminersion staining of postlarval shrimp 90 



A device for measuring live shrimp 92 



Distribution of pink shrimp larvae and postlarvae 93 



Library 95 



Seminars, Meetings, and Work Conferences 97 



Publications 98 



Manuscripts In Press 100 



Manuscripts Submitted 101 



COVER: The East Lagoon Field Station, completed and operative in 1962, 

 only 4 miles from the main laboratory, affords an opportunity 

 to work on living material in almost natural conditions. 



Ill 



