350 
PACIFIC SCIENCE, Vol. V, October, 1951 
TABLE 3 
Monthly Distribution of the Dominant Plankton Components in Kaneohe Bay, Oahu, Based on 
Routine Bi-weekly Hauls in Areas Occupied by Nehu. The Symbol xxx Denotes Great Abundance, 
XX Denotes Common Occurrence, and x Denotes Uncommon or Rare Occurrence 
ORGANISM 
JAN. 
FEB. 
MAR. 
APR. 
MAY 
JUNE 
JULY 
AUG. 
SEPT. 
OCT. 
NOV. 
DEC. 
Chaetognatha {Sagitta) .... 
XXX 
xxx 
xxx 
xxx 
xxx 
xxx 
xxx 
xxx 
xxx 
xxx 
xxx 
xxx 
Copepods (nauplii and 
adults) 
xxx 
XX 
xxx 
XX 
XX 
xxx 
XX 
XX 
xxx 
XX 
xxx 
xxx 
Ctenophora 
xxx 
xxx 
xxx 
xxx 
XX 
xxx 
xxx 
xxx 
XX 
X 
xxx 
xxx 
Shrimp larvae (mysis) 
XX 
XX 
XX 
X 
X 
XX 
X 
X 
XX 
X 
XX 
X 
Shrimp larvae (zoeae) 
XX 
X 
xxx 
X 
X 
xxx 
X 
XX 
XX 
X 
XX 
XX 
Crab larvae (zoeae) 
XX 
xxx 
xxx 
xxx 
XX 
xxx 
X 
XX 
xxx 
xxx 
X 
xxx 
Ghost shrimps {Leucifer 
faxonii) 
— 

XX 
X 
XX 
XX 
XX 
X 
X 
X 
X 
Barnacle larvae (nauplii) . . . 
X 
XX 
X 
- 
- 
- 
- 
X 
X 
XX 
xxx 
xxx 
Barnacle larvae (cypris) .... 
- 
X 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
Amphipoda (Hyperiidae) . . 
- 
X 
X 
X 
X 
X 
X 
XX 
XX 
- 
- 
- 
Tunicata (Larvacea) 
X 
X 
X 
X 
X 
X 
X 
XX 
X 
XX 
X 
X 
Gastropod and pelecypod 
larvae 
X 
X 
X 
X 
X 
X 
X 
X 
Ostracoda 
- 
- 
X 
X 
- 
X 
X 
X 
- 
- 
X 
X 
Stomatopoda larvae 
- 
- 
X 
- 
- 
XX 
- 
X 
X 
- 
X 
X 
Isopods 
X 
- 
- 
- 
- 
- 
- 
- 
X 
- 
- 
- 
Annelida larvae 
- 
X 
- 
X 
X 
- 
- 
- 
- 
- 
- 
- 
Medusae 
- 
- 
X 
X 
- 
- 
- 
- 
- 
- 
- 
- 
parent. Although too few fish were examined 
for reliable results, Allen (1921: 543) reported 
the stomachs of the West Coast anchovy, 
EngrauUs mordax, to contain only diatoms 
and dinoflagellates, and Suyehiro (1942: 54) 
showed the Japanese anchovy, EngrauUs 
japonicus^ to be exclusively a feeder on phyto- 
plankton. Nishikawa (1901), studying this 
same anchovy, found that the young fed 
chiefly on copepods and did not specialize on 
phytoplankton until adulthood was attained. 
Correspondingly, the intestine of E. japonicus 
is much longer than that of the nehu, and it 
is suggestive of herbivorous rather than car- 
nivorous habits. The lack of phytoplankton 
in the diet of Hawaiian anchovies might be 
attributed to the fact that diatoms and dino- 
flagellates are very sparse in the Hawaiian area. 
TABLE 4 
Monthly Characteristics of the Food Habits of Nehu in Kaneohe Bay. The Symbol x Denotes 
Occurrence in Stomach Contents 
ORGANISM 
JAN. 
FEB. 
MAR. 
APR. 
MAY 
JUNE 
JULY 
AUG. 
SEPT. 
OCT. 
NOV. DEC. 
Copepods (nauplii and 
adults) 
X 
X 
X 
- 
X 
- 
- 
X 
X 
X 
X - 
Barnacle larvae (nauplii) . . . 
X 
X 
X 
- 
X 
- 
- 
X 
X 
- 
- 
Barnacle larvae (cypris) .... 
X 
X 
X 
- 
X 
- 
- 
- 
- 
- 
- - 
Crab zoeae 
- 
- 
X 
- 
- 
- 
X 
X 
X 
X 
— — 
Shrimps 
- 
- 
- 
- 
X 
- 
X 
- 
- 
- 
- - 
Shrimp larvae (zoeae) 
- 
- 
- 
- 
- 
- 
- 
- 
- 
X 
- - 
Shrimp larvae (mysis) 
X 
- 
- 
- 
X 
- 
- 
X 
X 
X 
- - 
Ghost shrimp {Leucifer 
faxonii) 
- 
- 
- 
- 
- 
- 
- 
X 
X 
- 
— - 
Amphipoda (Hyperiidae) . . 
- 
- 
- 
- 
- 
- 
- 
X 
X 
- 
— — 
Isopods 
- 
- 
- 
- 
- 
- 
- 
X 
X 
- 
— - 
Stomatopoda larvae 
- 
- 
- 
- 
- 
- 
- 
X 
- 
- 
- - 
Fish larvae 
- 
- 
- 
- 
- 
- 
- 
- 
X 
- 
— — 
Ostracoda 
- 
- 
- 
- 
- 
- 
- 
- 
X 
- 
- - ■ 
Veliger larvae 
- 
- 
- 
- 
- 
- 
- 
- 
- 
X 
— - 
