FISHERY BULLETIN: VOL. 85, NO. 1 



ABUNDANCE (N0./10'*m^) 

 DAY NIGHT 



3 2 1 12 3 4 



_1_ 



-\ 1 r 



DIaphus dumerllll 



ABUNDANCE (NO./10''m^) 

 DAY NIGHT 



3 2 1 1 2 3 



t t 



u 



E 



X 

 I- 

 Q. 

 UJ 

 Q 



~T 1 1 1  1 1 r 



Benthosema suborbltale 



E 

 I 



H 

 0. 

 UJ 

 Q 



ABUNDANCE (NO./ lO'^m'^) 

 DAY NIGHT 



1 12 3 4 5 



I 



Myctophum aftlne 

 ABUNDANCE (NO./10'*m^) 



DAY 



NIGHT 



0-5 



15' 

 30 



50 

 75 



105 

 125 



^ 155 



E 



210 

 300 

 350 

 400 

 450 

 500 

 550 

 600 

 650 

 700 

 750 

 800 

 850 

 900 

 980 

 1000 



5 



5 



diit= 



■*^19.8 



(102.0) 



55.6(41.8) 

 ^^17.3 



a^ 



-^A 1 1 1 1 ' 1 1 1 1 r//~ 



DOMINANT SPECIES COMBINED 



Figure 4.— Diel vertical profile of dominant myctophid species in the eastern Gulf of Mexico, a - Diapkus dumerilii; b - Myctophum 

 affine; c - Benthosema suborbitale; d - All dominant species (7) combined. Numbers above bar indicate average abundance at depth, 

 numbers in parenthesis below bar indicate maximum abundance at depth. 



asperum, M. nitidulum, and M. obtusirostre were 

 most abundant in the surface (0-5 m) strata. Hygo- 

 phum macrochir, which also entered near surface 

 waters, Diaphus perspicillatus, D. taaningi, and 

 Myctophum selenops occurred primarily between 50 

 and 100 m. Seven species (Bolinichthys supralate- 



ralis, Diaphiisfragilis, D. garmani, D. termophilus, 

 Lampadena luminosa, Lobianchia gemellarii, Noto- 

 scopelus resplendens) were most abundant between 

 75 and 150 m. The remaining 11 species usually were 

 found deeper than 100 m, although several {Diaphus 

 brachycephalus, D. luetkeni, and Lampanyctus 



90 



