LIMPUS ; 



ROSS: 



Australia does not have the same mortality 

 pressure from trawlers. He was unsure about how 

 to interpret changes in C. caretta nesting levels. 

 The variation may not necessarily reflect real 

 population changes. Research on the foraging 

 grounds is needed to clarify this question. 



Some trawling mortality occurs in Oman. 

 Migrations are extensive and trawling mortality 

 may occur elsewhere. Research is needed on high 

 density nesting beaches. There are advantages and 

 disadvantages to both. He questioned the panel 

 about nvimber of nests per female per season. In 

 Oman it is estimated at 3.4-3.5 nests/ female/ 

 season. 



The stochastic method of determining number of 



nests per female per year which resulted in the 

 estimation of 4.1 nests/female/season in the 

 southeast U.S. was explained. 



Discussion was opened to the other participants. 



T. MURPHY; 



MROSOVSKY; 



RICHARDSON; 



FRAZER; 



DODD; 



S. HOPKINS; 



The differences in the rapid turnover of adult 

 females in Georgia versus longevity described by 

 Limpus were questioned. Can this really be 

 explained by tag loss? Was tag loss factored into 

 the model by J. Richardson? 



Because of the tag loss problem, multiple tagging 

 of individuals was begun after 1970. Georgia data 

 indicate that approximately two-thirds of the 

 population are Georgia nesters and one-third are 

 nesters coming from other areas and may represent 

 overflow from Florida. 



The developed models are based on post-1970 data. 

 Both the Frazer and Crouse work are adjusted for 

 tag loss. Caution should be exercised against 

 applying characteristics of one population to 

 another because of possible differences (e.g., 

 mortality rates) . Because loggerheads occur in 

 wealthy countries where more research can be done, 

 the models can be developed for loggerheads and 

 then adapted to the biology of the other species. 



Whenever population estimates are given the 

 methods and limitations must be included. 



Comments were made on beach management practices. 

 Predation rates on some of the best nesting 



143 



