FISHERY BULLETIN: VOL. 81, NO. 3 



NH 1 



--■1971 

 — 1972 





NH 35 



/. 



NH 3 





■•A 



NH 20 



.^ --" 



V 



NH 40 



/ 



\d 



10 

 8 



16 

 14 

 12 

 10 

 8 



NH 25 



NH 50 



NH 10 



r V 



^ JS 



NH 30 



/ 



NH 60 



"■ --«• 



FEB MAR APR MAY JUN JUL FEB MAR APR MAY JUN JUL FEB MAR APR MAY JUN JUL 



MONTH 



FIGURE 5.— Surface seawater temperatures at 12 sampling stations (NH-1 to NH-60) for February-July 1971 and 1972. 



were Zoea III. The peak of larval hatching had ap- 

 parently passed by that date. Larvae were present at 

 the 1 nmi station for the first time and were present at 

 all stations to 2 nmi. This contrasts to 1 9 7 1 , when P. 

 jordani larvae were never found so close to shore. The 

 1 1 April cruise was curtailed for rough seas at 1 nmi. 

 The most abundant stages were Ill's and IV's, but all 

 stages from I to VIII were present. On 20 April stages 

 I to XI were scattered between 5 and 30 nmi with VI 

 to VIII most common. The distribution on 22 May 

 was displaced offshore and spread between 10 and 

 45 nmi. Development was well advanced, and the 

 first juveniles of the season were found at 25 and 30 

 nmi. Zoeae X to XII were dominant. Larvae on 11 

 June were advanced, older than XI, and distributed 

 from 5 to 60 nmi with a peak between 10 and 20 nmi. 

 Many juveniles were caught in a night tow at 15 

 nmi. 



Figure 7 shows that early stages were generally less 

 dispersed seaward in 1972 than in 1971. Zoeae I to 



IV were found only inside 15 nmi. Older larvae were 

 found farther offshore, but rarely extended beyond 

 40 nmi. Late larvae (XIII) and early juveniles, though 

 present in small numbers, were more abundant than 

 in 1971 and were most abundant between 15 and 

 30 nmi. 



Coastal Distribution and Abundance 



All seven 30-nmi transects from Tillamook Head to 

 the Siuslaw River were completed in late March 

 1972, but, due to bad weather, only the northern six 

 were sampled in late April. As on the Newport line 

 (Transect V) , early larvae were most numerous inside 

 15 nmi, extending in to the 1 nmi stations in March 

 (Fig. 8) over the whole grid. Larvae were most 

 numerous at the 1 and 5 nmi stations, significantly 

 more so than elsewhere as indicated by analysis of 

 concordance of rank order of the stations according 

 to larval density (W = 0.62; df = 7,7; P<0.01; see 



460 



