FIGURES 



15. Total vessel days fished, total vessel days fish landed, and total 

 standard vessel days at Wildwood, N.J., 1964-67 8 



16. Relation between catch of Atlantic menhaden per standard vessel day 



and per vessel week in Chesapeake Bay, 1955-68 9 



17. Relation between weighting factor for relative fishing power and gross 

 tonnage of purse seine vessels in Chesapeake Bay 9 



18. Relation between gross tons and net tons on Chesapeake Bay 

 menhaden vessels 10 



19. Relation between weighting factor for relative fishing power and 

 length of purse seine vessels in Chesapeake Bay 10 



20. Annual catch of Atlantic menhaden by area, 1940-68 11 



21. Annual catch of Atlantic menhaden by area, 1959-68. (The shaded 

 area indicates the portion of the annual catch that exceeds the 10-year 

 average.) 11 



22. Yearly deviations (%) from the average annual catch of North Carolina 



and Florida-South CaroHna Areas, 1959-68 12 



23. Catch, fishing effort, and catch per unit of effort (C.P.U.E.) for the 



North Carolina and Florida-South Carolina summer fisheries, 1955-68 12 



24. Catch of Atlantic menhaden in Chesapeake Bay by month, 1940-68. 



(Dark bars emphasize 10-year periods.) 12 



25. Catch of Atlantic menhaden by area (%), summer fishery, 1955-68 ... 13 



26. Atlantic menhaden fishing effort in standard vessel days by area, 



1 941-68 14 



27. Atlantic menhaden catch per unit of effort by area, 1940-68 15 



28. Catch per unit of effort of 1- and 2-year-old menhaden in Chesapeake 

 Bay compared to CPUE of 2- and 3-year-old menhaden (1 year later) 



in Middle Atlantic Area 15 



29. Number of Atlantic menhaden of ages 0-4+ caught in the purse seine 

 fishery, 1955-68 (black areas show 1958 year-class) 16 



30. Total weight, by age, of catch of Atlantic menhaden, 1955-68. 

 (Shaded areas show 1951 year-class; black— 1958 year-class) 16 



31. Total weight, by age and year-class, of catches of Atlantic menhaden, 

 1951-68 17 



32. Relation between relative index of juvenile abundance and total catch 



of Atlantic menhaden by year-class, 1962-68 17 



33. Relation between catch of 0-age fish and total catch of all other ages, 

 Atlantic menhaden, 1955-66 year-class 18 



34. Catch of age-1 Atlantic menhaden compared to total catch of ages 0-3 

 year-class, 1955-67 19 



35. Natural logarithm (In) of the catch per standard vessel day in the 

 Chesapeake Bay Area, by age and year-class, 1950-65 20 



36. Natural logarithm (In) of the catch per standard vessel day for the 



total Atlantic coast menhaden fishery, by age and year -class, 1947-63 20 



37. Analysis of catch-effort statistics, Chesapeake Bay menhaden purse 



seine fishery, 1955-68 21 



38. Analysis of catch-effort statistics. South Atlantic menhaden purse 



seine fishery, 1955-68 21 



IV 



