80*00' 



Figure 2. — Release-recovery sites of marked pink shrimp 

 in the waters of south Florida, 1958-63. 



Florida Bay near and south of their release site, 

 and one was recovered about 6 miles 3 north of 



'Nautical miles are used in this report. 



the northern border of the Tortugas grounds. A 

 few shrimp released at Bottle Key migrated at 

 least 150 miles to the western portion of the 

 Tortugas grounds. 



On the southeast coast of Florida, young shrimp 

 released in Biscayne Bay (1 and 11) and Barnes 

 Sound (5) were recovered only near their respective 

 release sites. No recoveries were reported from 

 one release in Biscayne Bay (8) or from a small 

 release at Lower Matecumbe Key (4), which 

 borders eastern Florida Bay. 



Migrations of adult shrimp were determined by 

 releases in the deeper, offshore waters. Although 

 a release of maturing shrimp on the south Sanibel 

 grounds (13) resulted in 561 recoveries in the 

 south Sanibel fishery, only two shrimp migrated 

 to the Tortugas grounds. Marked shrimp re- 

 leased on two separate occasions on the Tortugas 

 grounds near 'C conservation buoy (12 and 15) 

 apparently remained on or near the Tortugas 

 grounds. The net movement of recovered indi- 

 viduals released on the Tortugas grounds was 

 northwesterly into deeper water. Similar move- 

 ment has been reported for tagged pink shrimp 



1 Calculated from the mean release date. 



- Calculated from all recoveries. 



3 Widespread of release dates at site number 1 negates value of "days-out time" data. 



452 



I .S. FISH \\1> WILDLIFE Skin 1(1. 



