8. Relation between yield per recruit and instantaneous fishing mor- 

 tality under various parametric assumptions for the inshore Ameri- 

 can lobster 17 



9. Actual and predicted per capita consumption of alllobsters, 1950-69 19 



10. Regional distribution of lobster consumption (at home) and popula- 

 tion, 1969 20 



1 1 . Regional distribution of lobster tail consumption (at home) and popu- 

 lation, 1969. 20 



12. Weekly total income for a sample of American lobster boats, 1967 22 



13. Hourly income for a sample of American lobster boats, 1967 22 



14. Estimated labor weekly income for a sample of American lob- 

 ster boats, 1967 23 



15. Actual and computed total weekly income from a sample of Ameri- 

 can lobster boats, 1967 24 



16. Maine, selected geographic locations 26 



17. Ranking of individuals in sample of lobstermen according to oppor- 

 tunity cost 34 



18. Exploitation 39 



19. Non-exploitation 39 



20. Extinction 40 



Tables 



1. Length-weight relation of American lobsters 5 



2. Lobster weight increase by moult; gross sample 5 



3. Sampling of commercial lobster catch for size distribtuion 6 



4. The distribution of lobster measurement samples by carapace size 



and moult classes 6 



5. Number and percent of lobsters by lobster years 7 



6. Size composition of recruit class samples in percent 8 



7. Percent decline in lobsters in recruit class by 3.175 mm intervals . . 8 



8. Average survival (days per lobster) in natural and artificial seawater 



to which metals have been added 11 



9. The relationships among effort, temperature, and lobster landings . 13 



10. Effect of price differences on lobster catch when effort and sea tem- 

 perature are approximately the same 15 



1 1 . Changes in catch in years in which temperatures were approximately 



the same, effort comparable or even increasing 15 



12. Estimated relation between catch, effort, and seawater temperature 



for the Maine lobster fishery (yield functions) 16 



13. Ex-vessel, wholesale, and retail prices and markups for American 

 lobsters. 1959-71 20 



14. Relation of lobster production and cost to various boat characteristics 



and operating patterns (1967) 21 



15. Revenue, costs, and returns to boat and lobsterman for a sample of 



186 boats, 1967 22 



16. Relation between returns to boat and lobstermen and various operat- 

 ing characteristics 24 



17. Average length-weight of lobsters 25 



18. Relation of effort, temperature, and catch, 1969-71 25 



19. Actual Maine American lobster catch, 1957-72, and estimated catch, 



1973-76 26 



20. Number of lobster licenses issued in Maine, 1961-72 26 



21 . Age distribution of lobster fishermen, 1971 26 



22. Distribution of the sample fishermen by communities 27 



23. The impact of exogenous shocks to the Maine inshore American lob- 

 ster fishery on the effort, catch, and biomass 28 



24. Summary of changes made by Maine Legislature in lobster fishery 

 regulations 29 



iv 



