FISHERY BULLETIN: VOL. 70, NO. 4 



Table 21. — Measurements of eggs of Scomberesox saurus collected on EASTROPAC II, 

 including collections made off Chile by Yelcho (MARCHILE VI). 



hauls on MARCHILE VI. Hence young of 

 Scomberesox have a north-south extent off 

 South America of at least 1,860 miles. 



Scomberesox eggs are approximately round 

 and occur singly — lacking the attachment fila- 

 ments characteristic of most eggs of fishes in the 

 suborder Exocoetoidei (see in this regard Orton, 

 1964). The egg .shell, however, is ornamented 

 with minute closely spaced swellings. Eggs from 

 13 collections were measured (eggs measured in 

 widest dimensions as they were not truly spheri- 

 cal); the data are summarized in Table 21. 

 The range in egg size was from 2.15 to 2.67 mm; 

 the range in egg diameter means for the 13 col- 

 lections was from 2.32 to 2.52 mm. Eggs in the 

 majority of collections (9 of 13) were quite sim- 

 ilar in average diameters, ranging between 2.32 

 and 2.36 mm. Three of the four collections of 

 eggs with larger average diameters were taken 

 on the southernmost two lines of the Yelcho pat- 

 tern. However, the collection of eggs made 

 nearest to the equator (lat 6°35') also was in 

 this group of larger eggs. 



Howella pammelas (Heller and Snodgrass). 

 Larvae of this species were most common to 

 the north of the equator in a broad band ex- 

 tending oflFshore between 0° and lat 9°N. Only 

 three occurrences were found to the north of 

 this band and 11 to the south. This species was 

 not limited in its distribution to particular water 

 masses. 



34. CARANGIDAE 



(36 occurrences, 224 larvae) 



Larvae of the pilotfish, Nauc rates diictor (L.), 

 with 18 occurrences, 27 larvae (Figure 17), was 

 the most widely distributed carangid on ETP II. 

 Over half of the carangid larvae were obtained 

 at two coastal stations — 45 larvae at 46.135 and 

 69 larvae at 47.527. As on ETP I, a number of 

 kinds of carangid larvae were taken, including 

 Chloroscombrus orqueta Jordan and Gilbert, 

 Selene brevoorti (Gill), and Caranx spp. 



30. APOGONIDAE 



(66 occurrences, 283 larvae) 



This family contains both oceanic and coastal 

 species. Larvae of coastal apogonids were taken 

 in four hauls off Central America and northern 

 South America. The remainder of the larvae 

 (62 occurrences, 278 larvae) were those of 



37. CORYPHAENIDAE 

 (109 occurrences, 185 larvae) 



Larvae of the dolphin, Coryphaeva spp., were 

 taken almost exclusively to the north of the 

 equator (105 occurrences, 180 larvae) on ETP 

 II; three of the four occurrences to the south 

 of the equator were at stations immediately ad- 

 jacent to the equator. Coryphaena larvae were 



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