Discrepancies in ichthyoplankton data in these two files 

 were corrected by inspecting original records from the sorting 

 laboratory, the original ichthyoplankton identification sheets, 

 and the samples themselves. Station and tow data discrepancies 

 between the two files were corrected by reviewing ships' logs and 

 deck tow sheets, original records from the sorting laboratory, 

 cruise announcements, publications, header information on the 

 ichthyoplankton identification sheets, and station plots 

 generated for each cruise. Eventually all station and tow data 

 were checked by comparing these sources. 



The corrected ichthyoplankton data base was then examined 

 statistically and outliers were found and checked as above. 

 Distributional plots were then prepared for each taxon and these 

 were checked by reviewing the data sources mentioned above and by 

 examining archived specimens. A listing of each taxon by station 

 (Table 4) was produced, which became the primary document for 

 subsequent checks. Misidentif ications found in geographic 

 outlier checks and other misidentif ications and data problems 

 discovered in the course of examining archived samples resulted 

 in several iterations of Table 4. Finally, totals in Table 4 

 were checked against annual summaries of incidence and abundance 

 (Tables 2 and 3) . Ecological analyses of the data were conducted 

 concurrently with editing procedures and provided cross-checks 

 that allowed correction of errors. 



SPECIES SUMMARY 



Collections made in 1975 were analyzed separately from those 

 taken in November and December of 1974 with respect to the pooled 

 occurrences and counts of larvae (Tables 2A,B; 3A,B). Larvae of 

 northern anchovy (Engraulis mordax) represented 72% of all fish 

 larvae taken on CalCOFI cruises during 1975 and numbered almost 

 10 times as many as Pacific hake, Merluccius productus , the next 

 most abundant taxon with 7.3% of the total larvae (Table 2b, 3b). 

 Northern anchovy also ranked first in incidence; M. productus 

 ranked 8th. The next most abundant was the rockfish genus 

 Sebastes with 3.9% of the total, followed by the sanddab genus 

 Citharichthys with 3.0%; they ranked 2nd and 4th respectively in 

 incidence. The deepsea smelt Leuroglossus stilbius ranked 5th in 

 abundance (2.5%) and 3rd in occurrence. Two myctophids, 

 Triphoturus mexicanus and Stenobrachius leucopsarus , ranked 6th 

 (1.6%) and 7th (1.2%) in number, and 6th and 5th in occurrence. 

 The final 3 taxa in the top 10 collected in 1975 were the croaker 

 family Sciaenidae, with 0.9%, the gonostomatid Vinciguerria 

 lucetia , with 0.7%, and the deepsea smelt Bathylagus ochotensis , 

 with 0.6% of total larvae. These 3 taxa ranked 10th, 16th, and 

 9th in incidence. The appearance of croaker larvae in the top 10 

 may reflect the increased number of stations occupied on the 

 shoreward end of each line where these larvae are most abundant. 

 These 10 top taxa contributed 93.5% to the total number of larvae 

 collected in 1975; the remaining 6.5% was distributed among 140 

 taxa plus the disintegrated and unidentified categories. The top 



10 



