

stocks, landings of which, in 1967, were worth more than $100 

 million to the fisherman. 



dance and on the seasonal, areal, and \ertical distribu- 

 tions of planktonic stage shrimp. 



The abundance of the \er\ young stages of brown 

 shrimp has been measured and used to predict the mag- 

 nitude of the popuhition of commercial-size brown 

 shrimp. 



The most profitable marketing size for pink shrimp 

 was established from growth and mortality estimates 

 obtained by mark-recapture experiments. 



Studies of estuaries ha\e shown that the edges and 

 grass beds of bays and lagoons are important as nurs- 

 ery areas for many commercial species of fish and shell- 

 fish. Specific .studies haxe shown how alteiation or 

 destruction of nursery areas by bulkheading destroys 

 the value of the estuary as a habitat for the commer- 

 cially important shrimp. 



