Dealer Y~ 6 



CATCH STATISTICS 

 Dor 1 3 Month AUGUST Year 1968 



Total catch In pounds 199 h 1 99 



Total catch in numbers 183 <t 



Total value of catch $ 179.10 hi 79.10 



Total number of females in sample 32 

 Total number of males in sample 18 

 Total number of trap-hauls 404 



7- Total number of traps set out /u4 



8. Total number of man-days O 



9. Total number of man -hours 3150 



10. Total number of boat-days D 



11. Total number of boat-hours 2. j.Uo 



12. Mean weight of lobs t ers in catch 1.09 



13. Catch in pounds / f rop -haul 49 



14. Catch in numbers/trap-haul .45 

 15- Catch in pounds /man-day 33-1/ 



16. 



Catc h 



i n 



numbers /man-day 



30.50 



17 



Catch 



1 n 



pounds /man-hour 



6.32 



18. 



Catch 



i n 



numbers /mon-hour 



5.81 



29. 



Catch 



i n 



pounds/boat -day 



39 80 



20- 



Catch 



1 n 



numbers/boat -day 



36.60 



21 - 



Catch 



1 n 



pounds / boat - hour 



7.93 



22. 



Cat ch 



i n 



numbers /boat -hour 



7. 30 



23. 



Va 1 ue/ t rap-haul -* 44 





24 



Va 1 ue/ 



man-day $2 9-85 





25. 



Va 1 ue/ man-hour 5.69 

 u.l. ../I J-.. 5-1 r 00 





27. Va I ue/boat - hour 7 14 



Fio-ure 5. — Summary sheet of collected data for the sample-day. 



in a month; nevertheless, we felt an attempt 

 should be made in accordance with the method- 

 ology as outlined by Abramson and Tolladay 

 (1959). As mentioned above, the limitation of 

 usually 30 days in a month resulted in some 

 months with a greater number of sample-days 

 than there were total days in that month. In 

 addition, the 1967 optimum allocation (dis- 

 regarding the feasibility) when applied to the 

 1968 data was unsuitable for the desired esti- 

 mates and confidence limits (Table 3). 



Of course the alternative is to stratify the 

 year into larger periods (groups of months), 

 but as the catch effort, length frequency, and 

 mortality sections demonstrate, we would lose 



needed data by month and the resultant anal- 

 yses. Therefore, we accepted the results of 

 10 days of sampling per month with its large 

 standard error for certain months of the year. 

 Even in this situation the total yearly expanded 

 estimates have acceptable standard errors of 

 approximately 15% . 



Expanded Estimates From 

 Probability Sampling 



Probability sampling of the commercial lob- 

 ster fishery enabled us to make estimates of 

 the total catch and effort (by several categories) 

 for the collective total of 153 dealers and all 



12 



