Walled Fish Traps of Pearl Harbor. 
By JOHN F. G. STOKES. 
AMONG the few remaining evidences of early Hawatian life 
are the walled fish traps, pounds or weirs at the entrance to Pearl 
Harbor, Oahu. They are particularly interesting as not occurring 
elsewhere in the group, probably for the reason that conditions 
favorable to their operation are only to be found at this one place. 
The Hawaiians have had for many years a system of raising 
fish for food within ponds and walled enclosures, called /oko, ad- 
jacent to the sea, the varieties being confined to such shore fishes 
as amaama (Mugil cephalus Lianneeus), and awa (Chanos chanos 
Forskal), and an occasional mo7z (Polydactylus sexfilis Cuv.& Val.), 
kaku (Sphyvrena snodgrasst Jenkins), or oopuhue ( 7etraodon sp.) 
which may have entered the pond when young. ‘The system is still 
in use in all the islands, more particularly on Molokai' and Oahu, 
and has already been referred to by Dr. J. N. Cobb.” There was also 
a method of taking fish in weirs in the mountain torrents, in which 
the stream was dammed with a transverse wall just above the 
rapids and conducted by means of a canal over a horizontal sieve 
of long slender sticks lying parallel and close together. During 
floods, when the waters of the stream were rendered muddy, great 
quantities of oopu (fresh water gobies) were caught in these weirs. 
The Pearl Harbor fish traps on the other hand were used for 
the purpose of taking the ocean fishes which had entered the har- 
bor, the principal being the akule ( 7rachurops crumenophthalma 
Bloch), ozo (Albula vulpes Linneeus), weke (Mulloides and Pseudu- 
peneus sp.), and pualu (Hepatus guntheri Jenkins), and the makv- 
awa (E:trumeus micropus Schlegel). Occasionally other fishes were 
taken in small numbers such as kawakawa and aku (Gymnosarda 
sp.), opelu (Decapterus pinnulatus Eyd. & Soul.), sharks—in fact 

1On this island, use was made of very large ponds, in the walls of which 
were numerous entrances and exits—the fish being netted while attempting 
to pass through. It is hoped to illustrate these structures at a later date. 
2U. S. Fish Commission Bulletin, vol. xxiii, pt. 2, p. 746. 
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