FISHERY BULLETIN: VOL. 72. NO. 3 



hence the data on larval distribution, species, 

 and stages taken are entered directly on the 

 chart (Figure 2). The successful tows indicate at 

 least a presence of larvae in all of the major 

 currents traversed. The North Equatorial Cur- 

 rent at this time showed a few stage VII P. 

 penicillatus with Clipperton Island a likely 

 source of origin. 



IS'N 



10' 



SOS 



< 



NORTH EQUATORIAL 

 CURRENT 



<r 



~l 1 1 r 



p.p. I M ~\ 



• □ 



D 



D' 



TRANSITION ZONE 



EQUATORIAL 

 COUNTERCURRENT 



• □ .D 

 *—P.g. i,X 



D' 



D 



Ck^- 



D 



•a 



/?/£3.l,3mi;2,IX- 



SOUTH EQUATORIAL 



CURRENT 



•fg'x'? 



n~ 



^/P. i,x 



<- 



• D 



P.g.\,ll.- 



□ . 



125° 120° IISOW 



JORDAN 60 



Stations with available 

 plankton samples: 



• 5'x5' net * 



A nnidwater trawl 



n neuston net 



Pp. Ponulirus penicillatus 



P.g. Ponulirus gracilis 



nunnber of phyllosomo 

 larvae taken (Arabic No.) 



stage of phyllosoma 

 larvae token (Romon No.) 



Figure 2. — RV David Starr Jordan cruise 60 station pattern with 

 number and stage (Roman numeral) of phyllosoma larvae taken at 

 station indicated. 



David Starr Jordan Cruise 65 

 24 Aug.-30 Sept. 1971 



As shown in Figure 3, this cruise covered an 

 area much nearer the Galapagos Islands, from 

 which most of the phyllosomas taken probably 

 originated. It also extended less to the north 

 and farther to the south. The data will again be 

 presented here by unit areas (2° squares). 



Unit 1 falls below lat. 11°S and yielded no 

 larvae in a total of eight tows (Table 2). It is 

 probable that the area is within the influence of 

 the northern boundary of the western extension 

 of the Peru Current which as already men- 

 tioned had few or no phyllosomas during the 

 EASTROPAC cruises. 



In unit 2 within the South Equatorial Cur- 

 rent, a total of 16 tows with the various nets 

 yielded 19 larvae, mainly by the trawl. 



Units 3 and 4 although within the South 

 Equatorial Current had only two and four lar- 

 vae respectively in a total of 18 mixed tows. 



Unit 5 directly west of the Galapagos was the 

 most productive of larvae where five of eight 

 neuston hauls yielded a total of 33 specimens. 



Unit 6, still within the South Equatorial Cur- 

 rent, was less productive of larvae although 

 three of eight neuston net tows took five larvae. 



A total of 35 tows taken with the 1-m net 

 simultaneously with the neuston net during the 

 cruise yielded no larvae whatever (see Discus- 

 sion). 



David Starr Jordan Cruise 77 

 8 Jan.-17 Feb. 1973 



Figure 4 depicts the station pattern across 

 the current system. As in cruise 60 there were 

 so few phyllosoma larvae that it will suffice to 

 record the data relative to these directly on the 

 chart. There were a few scattered palinurid lar- 

 vae in the North Equatorial Current. The 

 nearest likely source of these being Clipperton 

 Island. A few also occurred in the northern part 

 of the South Equatorial Current. That these 

 probably came from the Galapagos Islands is 

 indicated by the accompanying larvae of Scyl- 

 larides astori, the adult of which is relatively 

 rare except in that area. 



Of special interest however is the occurrence 

 of a single, late stage Parribacus sp. phyllosoma 

 in this group of stations. No adult species of 

 this genus has been reported from the west 



642 



