California, San Diego Computing Center. After entries were 

 completed for an entire year, print-out listings of taxa and 

 counts on each station were compared with the original data 

 sheets to eliminate keypunch errors. Next, data in the file were 

 cross-checked with data on an existing file which contained: 

 station and tow data; numbers of eggs of sardine, anchovy, and 

 saury (Cololabis saira) ; numbers of larvae of sardine, anchovy, 

 hake, jack mackerel, and Pacific mackerel; total number of fish 

 eggs; and total number of fish larvae. 



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 (Moser et al., 

 1987) were conducted concurrently with editing procedures and 

 provided cross-checks that allowed correction of errors. 



SPECIES SUMMARY 



Larvae of northern anchovy (Engraulis mordax) represented 

 30% of all fish larvae taken on CalCOFI cruises during 1957 and 

 numbered twice as many as Pacific hake (Merluccius productus) , 

 the next most abundant species (Tables 2, 3). Incidence of 

 anchovy was high (2nd) , but hake incidence was comparatively low 

 (7th), indicating relatively large sample sizes. The next most 

 abundant species, Vinciguerria lucetia , a midwater gonostomatid, 

 was widespread in samples from the southern part of the CalCOFI 

 pattern; it ranked 3rd in abundance (11.6%) and also in 

 occurrence. Rockfish larvae, Sebastes spp. , a composite of about 

 70 species, ranked 4th in abundance (7. 2%) and also in occurrence. 

 The deepsea smelt, Leuroglossus stilbius , and jack mackerel, 

 Trachurus symmetricus , were the next most abundant species, 

 ranking 5th and 6th in abundance and 6th and 10th, respectively, 

 in occurrence. Three midwater lanternf ishes, Stenobrachius 

 leucopsarus , Triphoturus mexicanus , and Diogenichthys laternatus , 



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