continental shelf would be an important step toward understanding the causes 

 of annual fluctuations in survival of the larvae from different broods. 



Published pages of biological research on Gulf of Mexico shrinap 

 by the Bureau of Commercial Fisheries (as of June 30, 1962) 



5 -year 

 period 



1931-48 

 work by the 



former 



New Orleans 



Laboratory 



Contract 

 research for 

 the Bureau 



Biological Laboratory at Galveston 



Annual reports 



ca. 



114 

 40 



Other 



In press 



2/ 



200 

 25 



307 



Total 



4 



162 



95 



36 



34 



106 



624 



372 



Total 



450 



297 



154 



225 



307 



1,433 



1962-66 

 estimate 



250 



200 



860 



II 



1, 310 



\_l Work performed by Universities of Texas and Mianai, and Tulane 



University. 

 2./ Manuscript pages in press June 30, 1962. 

 3./ Estimated from number pages published and manuscript pages in 



press during first 6 months of the 5 -year period. 



The broad scope and complexity of the problems encountered be- 

 come apparent if one notes the subject matter of the reports already published 

 or in press. Other research at the Biological Laboratory also has an impor- 

 tant bearing on shrimp conservation. Thus, postlarval shrimp enter the es- 

 tuaries, settle to the bottom, and grow rapidly for a period of 2 to 3 months 

 before starting their return journey to the open Gulf. It is imperative that 

 these estuarine nursery areas be preserved from pollution, encroachment, or 

 undesirable hydrographic changes. Our estuarine research is aimed at de- 

 termining the most suitable conditions for various species, including shrimp. 



