Page 
EN I ne NS at) Sea ae, 6 MS Sh toe bo ee ht Meee doe. 1 
rr Mn Set ee Cee A. eS hei ot oA ETM, So. ke Gil <. bP OIE Als OR. 1 
Crean ers. ek ye ee RR A ete ee EO” oe td Tees. oo. 2 
enn Mem AATeA-MOnbiet 6: Feith) > tis, oR Pod lag Boek 2 om boas. we deied 63 2 
0 A oe FT aon an a ia aah ice Lurie el. il wen, ae 2 
Carers Sane SHR. ot Sosred cm! aledd’s. ws. culls eenfees.8 ao bee. 2 2 
Of. 2 URS a re. eee) en, ee 2 
BArEBAbes ene uarcomposivon ofveatch® “2 Adare Jefe) Soekics © ee tes cee Gelergne oo 3 
Pi ae ee MCs eOImpoOsitiogn Of .CALCHES) . . =... 6 2 << % so. «s« ee ~ oOUlmi viteettsé Jeske... 5 
ner e Wii. Usted, sh styieds nce). avelaida kb .calsionened. digcet bade. 5 
aes MERE Seer a acca, oi, gC WR Ss a ws & ov OK 4 ee Gant. 6 6 
inn errr. genie: fencer A. sth dienes wear. religida. ko noldempeum. dighsl, beleatid © ¢ a 
PERN MIDLER IMINALES Mri.) Ses ge 8 Gene mes we oN 28 bow 3 we S eB fa aneke as « 9 
nate nmmErree Meee seen). Ye “Dees aN. acids. Yh ok wie ae. OR borer. 9 
a RENE aa hos os i vine) @ one wh. Sie me's a: ws oe SA tn ey OEE 9 
Fen ERR, MRC AS ot) sores acts «. SMG Ac ie RISO MET le WME MRSS <8 9 
ee a ere Ee wali: Tair dls fe. atigndis tne Seat aS. Goan oad Sot eRe Rie A leakeRh.. ss 11 
i CiCiner weres mnie ees. wt Mineo cue). dosterde. Wo sdendomsews. argent, Gases’. 11 
en SEER TE am i sk a ei we le ew apn w » RPO Sede leeks. 11 
Figures 
1. Map of the eastern tropical Atlantic where American seiners fish for tropicaltunas .............. 2 
2. Estimated length composition of yellowfin tuna caught by American seiners in the eastern tropical 
RNS MRS CRO 1S 2 ac BP sas in (6/2). SS Ggus, sige Lev ar AT ourirGy wisehpmaier le eet ea adie oe Welk Some an gee as 6 
3. Estimated length composition of skipjack tuna caught by American seiners in the eastern tropical 
FN ARNE TCR ONS 11 REM essa fo: eagte Yeh ve. “e\ o's) gh ce- 5, ay gb. Ge aie beige ve ee Gh Dae pee Se ee anes 7 
4. Estimated length composition of bigeye tuna caught by American seiners in the eastern tropical 
Pati AEG CME NTO RATICL ipl Armee en) SoS cae tee Mal Suseh ey epee ae ONS, oe, Ga Re AC oT ogee een Sas 8 
5. Estimated length composition of yellowfin tuna caught in August 1973 in NMFS area 52 ........ 9 
6. Estimated length composition of yellowfin tuna by month caught by American seiners in 1970 ...... 10 
7. Estimated length composition of skipjack tuna by month caught by American seiners in 1970 ...... 11 
Tables 
1. Catch (metric tons) and number of length-frequency samples of yellowfin tuna by NMFS area-month 
strata. Samples substituted in strata without samples are identified in parentheses ........... 3 
2. Catch (metric tons) and number of length-frequency samples of skipjack tuna by NMFS area-month 
strata. Samples substituted in strata without samples are identified in parentheses ........... 4 
3. Sampling coverage of NMFS area-month strata in which yellowfin and skipjack tuna were caught by 
PACHCANSGUMALSCINELS INV LOOS-04. cA agcue cil ere ee fe ee ea ee, SE ee Sees 5 
4. Estimated age composition of yellowfin tuna caught by the American purse seine fleet in the eastern 
EEO PICA MAA GI COME Ae ee ca odes a) cose dae cp seis) See Oe ee etree, © Oe, ET LS 7 
5. Estimated age composition of skipjack tuna caught by the American purse seine fleet in the eastern 
EEO PICRUPAULATI EI CMe yk ahs wren 6 asc. 5p eee a ete SL oe cle eee ae SE ee oe Le len 7 
6. Catch and number of length-frequency samples of bigeye tuna caught by the American purse seine fleet 
INETHETCASLEFHGCLODICAIWAUIADUIC: 2.5) 4. ensae ons wep ee ee Tete ae Dee oe eh SOUR AE 8 
7. Number of NMFS area-month strata in which single samples were obtained or substituted ....... 10 
Appendix Tables 
1. Estimated length composition of yellowfin tuna caught by American purse seiners in the eastern 
ELOPICAIPATIANLICEIN EG OOO EER AN EAM ne eae Seay aie teen Tee GS 3,°5 Wiusplen se sasoe ote nee ees, Ss 13 
2. Estimated length composition of yellowfin tuna caught by American purse seiners in the eastern 
iEODICAIBA LI ATILICHHI Dl OOO MM Nral eae eePEs PR noms ecec sae f,G che eece ea) 6 ug «ss ese es See ee 13 
3. Estimated length composition of yellowfin tuna caught by American purse seiners in the eastern 
PLODICH AT ARI CEITIO OO meteme Mtr erm ence ce nda cee wep creas O cujece ela es, Ss fe sure. ce em 14 
