CLARKE: DIETS OF FOURTEEN SPECIES OF MESOPELAGIC FISHES 



Other prey: O. schmidti — 70 m: 31-35 mm — 1 Eucalanus sp. (1 .60), 2 isopods (^) 



36-40 mm — 1 Neocalanus CV (0.1 1). 1 Unident. Harpactacoid (y-), 1 Thysanopoda sp. (7.90), 

 2 pteropods >1 mm (x) 

 90 m: 27-35 mm — 1 Scolecithrix bradyi (0.09). 1 Calocalanus sp. (^-). 2 heteropods (0.95), 

 1 Penaeldean juvenile,' adult (1.10), 1 polychaete (0.17), 1 fish larva (0.24) 

 36-41 mm — 1 Ischnocalanus sp. (-.'-), 1 amphipod 1.0 mm (x), i ostracod >3.0 mm (1.10) 

 D. perspicillatus — 3 Euchaeta rimana (^.). 1 Euchaeta sp. (0.63). 1 Scolecithricella sp. <1.0 mm 



(0.13), 1 Nematoscelis sp. (2.70), 1 Caridean juvenlle/adult (0.84), 

 1 polychaete larva (x), 1 insect (■.=) 

 D. trachops — 1 Siphonophore (11.90) 



numbers of prey per fish rather than from any 

 obvious differences in diet composition or relative 

 preference. 



Diaphus perspicillatus (Table 10) 



The number of prey per fish for D. perspicillatus 

 was the highest of any species included and, possi- 



bly because of this, so was the diversity of prey. 

 Almost a third of the prey were microzooplankton 

 (Table 2) — the great majority of these, Oncaea 

 spp. The AS V for Oncaea , if corrected, is still high, 

 as were the ASV's for about half the macrozoo- 

 plankton prey types. The most frequent macrozoo- 

 plankton were small copepods: P. gracilis, 

 Lucicutia, Paracandacia; but several medium to 



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