YOUNG JACK CREVALLES 



439 



Data from the dip-net collections of the Gill 

 cruises are interpreted to indicate the relative dis- 

 tribution and abundance of the larval and juvenile 

 stages of the five common species in this area by 

 comparison of the number of occurrences in the 

 collections and the total number of specimens of 

 each species: 



Number of Number of 

 occurrences specimen* 



cry sos 31 307 



ruber 45 231 



bartholomaei 20 35 



latus 4 8 



hippos 1 1 



C. ruber is most widely distributed, but crysos 

 is most abundant. C. bartholomaei is more re- 

 stricted in both occurrence and numbers than 

 crysos and ruber. The scarcity of latus and 

 hippos is attributed to their apparent tendency to 

 migrate to inshore waters at about 21 to 50 mm. 

 standard length. The majority of these dip-net 

 collections were made in association with floating 

 sargassum. The collections were about evenly 

 divided between day and night hours. 



The juveniles of the five common species are 

 frequently found in the same locality. Two or 

 three species were taken together in 28 of the 

 67 dip-net collections of the Gill cruises that 

 contained Caranx species. The following com- 

 binations occurred (number of occurrences in 

 parentheses): ruber-barfholomaei (9), crysos-ruber 

 (11), crysos-ruber-bartholomaei (5), crysos-bartholo- 

 maei (1), crysos-latus (1), crysos-ruber-latus (1). 

 Records of a few stations of the M/V Oregon 

 from the Gulf of Mexico, of a few collections of the 

 U. S. National Museum, and collections of the 

 Combat from the Western Atlantic added the 

 following combinations: bartholomaei-latus } barthof- 

 omaei-hippos, lotus-hippos, crysos-hippos, crysos- 

 latus-hippos, ruber-bartholomaei-hippos, crysos- 

 ruber-barfholomaei-hippos, and crysos-ruber-latus- 

 hippos. In all of these collections the sizes or 

 size ranges ! of concurrent species were nearly 

 equal or overlapping. 



The stomach contents of 26 fish taken by 

 trolling on the Gill cruises collectively contained 

 all five of the common species of Caranx. Data 

 on these Caranx specimens are given in table 2. 

 These specimens have not been included in the 

 tables of individual species locations. 



Table 2. — Occurrence of Caranx species in the stomachs 

 of 26 fish caught by trolling on Gill cruises, listed by 

 predator species 



[An asterisk (*) indicates estimated size] 



Carani species 



Sphyraena barracuda 



(Walbaum): 



ruber -. 



hippos 



hippos (?) 



hippos (?)__ 



hippos (?) 



hippos (?) 



hippos (?). 



Seriola dumerili Risso: 

 crysos(?). 



Coryphaena hippurus Lin- 

 naeus: 



ruber 



bartholomaei 



bartholomaei 



bartholomaei 



bartholomaei 



Carani sp 



bartholomaei 



bartholomaei 



crysos 



crysos 



ruber 



bartholomaei 



crysos 



crysos 



ruber 



ruber 



crysos 



crysos 



latus or hippos 



crysos 



crysos 



ruber 



bartholomaei 



Lobotes surinamensis 

 (Bloch):' 



ruber 



ruber 



ruber.. 



ruber 



ruber 



ruber. 



ruber 



ruber 



ruber 



ruber 



Katsuwonus pelamis 

 (Linnaeus): 



latus 



latus 



latus 



crysos 



crysos 



Euthynnus alletteratus 

 (Raflnesque): 



crysos 



latus 



Thunnus atlanticus (Les- 

 son): 



hippos 



crysos (?) 



Thunnus albacares (Bon- 

 naterre) : 



Caranx sp 



crysos 



crysos 



crysos 



ruber 



ruber 



ruber 



ruber 



ruber 



ruber 



bartholomaei (?) 



Carani sp 



Carani sp 



Carani sp 



ruber 



ruber 



latus 



Stand- 

 ard 

 length 

 (mm.) 



•167 

 21.2 

 12.7 



•15 



•18 



•21 



•22 



•90 



•38 

 •40 

 •52 

 •56 

 •55 

 •55 

 •58 

 •98 



•115 

 •85 

 •83 



•100 



•110 

 •23 

 33 

 •51 

 •52 

 •62 

 •45 

 •50 

 •65 



•140 



•31 

 •32 

 •32 

 •32 

 •44 

 •45 

 •45 

 •50 

 •55 

 65 



•31 

 32 

 •36 



77 



•25 

 •28 



28.5 

 •12.3 



•28 

 •33 

 •39 

 •48 

 58 

 61 

 73 

 74 

 •87 

 89 

 •51 

 •25 



•90 

 49 

 60 

 36 



Location 



N. latitude 



25°53' 

 26°05' 

 32°42' 



23°40. 5' 



23°40. 5' 



23°40. 5' 

 23°44' 

 27°02' 



28°04' 



28°04' 

 29°01' 



31°33' 



31°34' 



34°15' 



) 26°21. 2' 



25°56. 5' 



25°57' 



26°09. 5' 



29°07' 

 32°09' 



26°06' 

 30°20' 



25°57. 5' 



26°01. 5' 



26°06' 

 28°16' 



W. longi- 

 tude 



77°51' 

 78°12' 

 78°52' 



76°50' 



76°50' 



76°50' 

 76°54' 

 79°23' 



79°09' 



79°09' 

 80°02' 



79°00' 



79°27' 

 74°28' 



76°46. 5' 



77°54' 



77°55' 



78°13. 5' 



80°25' 

 79°28' 



78°08' 

 80°01' 



77°56' 



78°01. 5' 



78°08' 

 77°01' 



Date 



Oct. 11, 1953 



N'ov. 11, 1953 



Aug. 15, 1953 



June 19,1954 



June 19,1954 



June 19,1954 



June 18,1954 



July 25,1953 



July 26, 1953 



July 26, 1953 



Apr. 27,1954 



Aug. 5, 1953 



Aug. 5, 1953 



May 12, 1953 



July 19, 1953 



June 22, 1954 

 June 22,1954 

 June 22,1954 



Aug. 28,1954 

 Oct. 25, 1953 



June 22, 1954 

 June 26,1954 



June 22,1954 



June 22, 1954 



June 22,1954 

 Nov. 5, 1954 



1 About 450 mm. standard length; taken at night by dip net. 



