SUMMARY OF RESULTS 



Approximately 224 species of fishes were collected on the two cruises (Table 3). The number cannot 

 be determined exactly because of the uncertain identification of some forms. The family Myctophidae 

 accounted for a fourth of the total number of species with 55 species. Next were the Melanostomiidae with 

 ca. 13 species and the Gonostomatidae with 11 species. Following these were Congridae and 

 Melamphaidae with 9 species, Sternoptychidae and Scopelarchidae with 8, and Paralepididae with 7. The 

 most speciose genera were in tiie Myctophidae with Diaphus represented by at least 12 species and 

 Lampanyctus by 8 species. 



Approximately 23,930 specimens were collected by 48 IK and 27 MT trawls (Table 3). The family 

 Myctophidae was the most abundant with 12,357 specimens, representing 52% of the total. Next were the 

 Phosichthyidae with 4,848 (20%) and the Gonostomatidae with 4,805 specimens (20%). The next most 

 abundant was the Sternoptychidae with 736 specimens (3%). These four families accounted for 95% of 

 all specimens taken by the trawls. The five most abundant species were Vinciguerria lucetia (3,335 

 specimens), Cyclothone acclinidens (2,278), Ceratoscopelus townsendi {\ J 65), Diogenichthys atlanticus 

 (1,614), and Notolychniis valdiviae (1,377). These five species represented ca. 43% of all specimens 

 collected. The next five most abundant species were: Vinciguerria uimbaria (1,155), Triphoturus 

 mexicanus (993), Ceratoscopelus warmingii (964), Bolinichthys longipes (786), and Diogenichthys 

 laternatus (639). These 10 top-ranking species contributed ca. 62% of all specimens, while representing 

 only ca. 5% of the total species complement. In contrast, about half (ca. Ill) of the species were 

 represented by five or fewer specimens and one-quarter (ca. 53) of the species were represented by a 

 single specimen. 



Comparison of the IK and the MT trawls is complicated by the much larger mouth and mesh size of 

 the latter. On 7210-JD, 16 sample pairs were taken. The MT trawls fished to an average depth of 430m 

 and filtered an average of 1,045,500m' of water whereas the IK fished to an average depth of 234iti and 

 filtered an average of 9,830m\ The MT collected an average of 0.74 fish per lOm-* whereas the IK 

 collected an average of 3.96 fish per 10m^ The smaller catch rate of the MT can be attributed to the 

 escapement of small fish through the larger mesh. No relation was found between the number of fish 

 collected by each trawl at the same station. In spite of the lower catch rate per volume of water filtered, 

 the larger samples and larger sizes of fish collected by this net make it a valuable survey tool. 



LIST OF FISHES 



The fishes collected on this survey follow in phylogenetic order according to the classification in 

 Eschmeyer (1990). Taxa are listed alphabetically within families. Data for each species are presented in 

 the following order: cruise; station number; type of gear (IK=6-foot Isaacs-Kidd Midwater Trawl; 

 MT=Universal Mark-II Midwater Trawl); the number of specimens, shown in parentheses; and the size 

 range. Specimens captured on the CalCOFI survey pattern are listed first, followed by stations on the 

 offshore transects. The distributions of several species are shown on a single figure to reduce the number 

 of figures. Generally, the sequence of figures follows the sequence of species; however, in many cases, 

 non-sequential species were grouped to reduce the total number of figures. All specimens will be deposited 

 in the Marine Vertebrates Collection of the Scripps Institution of Oceanography. 



