Page 



9. Mean fork length (in millimeters) of fish at each age in samples from 



purse-seine catches, by area and season, 1955-57 16 



10. Mean weight (in grams) of fish at each age in samples from purse-seine 



catches, by area and season, 1955-57 17 



APPENDIX TABLES 



1. Length-frequency distributions in samples from purse-seine catches. 



South Atlantic Area, excluding the North Carolina fall fishery, 1957 .. 22 



2. Length-frequency distributions in samples from purse-seine catches, 



Chesapeake Bay Area, 1957 23 



3. Length-frequency distributions in samples from purse-seine catches, 



Middle Atlantic Area, 1957 24 



4. Length-frequency distributions in samples from purse-seine catches. 



North Atlantic Area, 1957 25 



5. Length-frequency distributions in sannples from purse-seine catches. 



North Carolina fall fishery, 1957 26 



6. Weight-frequency distributions in samples from purse-seine catches. 



South Atlantic Area, excluding the North Carolina fall fishery, 1957.. 28 



7. Weight-frequency distributions in samples from purse-seine catches, 



Chesapeake Bay Area, 1957 29 



8. Weight-frequency distributions in samples from purse-seine catches. 



Middle Atlantic Area, 1957 30 



9. Weight-frequency distributions in samples from purse-seine catches. 



North Atlantic Area, 1957 32 



10. Weight-frequency distributions in samples from purse-seine catches. 



North Carolina fall fishery, 1957 34 



11. Mean fork length and weight in samples from purse-seine catches. 



South Atlantic Area, excluding the North Carolina fall fishery, 1957 .. 36 



12. Mean fork length and weight in samples from purse-seine catches, 



Chesapeake Bay Area, 1957 36 



13. Mean fork length and weight in samples from purse -seine catches, 



Middle Atlantic Area, 1957 37 



14. Mean fork length and weight in samples from purse-seine catches. 



North Atlantic Area, 1957 38 



15. Mean fork length and weight in samples from purse -seine catches. 



North Carolina fall fishery, 1957 39 



IV 



