Drifting Object and Pelagic Fish — Gooding and Magnuson 
491 
TABLE 1 ( continued ) 
SPECIES, GENUS, OR FAMILY 
(Common Name in Parentheses) 
DRIFT 
LOCATION 
BEHAVIOR 
CATEGORY 
FORK LENGTH 
(cm) 
MAXIMUM 
NUMBER SEEN 
AT ONE TIME 
Mulloidichthys samoensis 
(goatfish) 
H 
RV 
10-12 
1,000+ 
Naucrates ductor adult 
(pilotfish) 
HO 3 
RV 
15-30 
7 
juvenile 
H03 
R 
2.6-6.7 f 
7 
Nomeus gronowi 
(man-of-war fish) 
0 
V 
2 
1 
Prionace glauca 
(great blue shark) 
0 
V 
150 
1 
Psenes cyanophrys 
(freckled driftfish) 
H03 
R 
1.5-1 2. 4 f 
1,000+ 
Remora remora (attached) 
(remora) 
H03 
RV 
15-30 
Rh/ncodon typus 
(whale shark) 
3 
V 
300 
1 
Seriola rivoliana % 
(amber jack) 
H 
R 
20* 
1 
Seriola dumerili 
(greater amberjack) 
H 
R 
3.7 
1 
Sphyraena barracuda 
(great barracuda) 
H 
V 
50 
1 
Thunnus albacares 
(yellowfin tuna) 
H3 
RV 
25-40 
37 
Tur slops sp. 
HO 
V 
150-200 
20+ 
(bottlenose dolphin) 
* Drift Location: H -- Hawaii; 0 r= 0° Latitude; 3 = 3° S. 
Behavior Category: R = Resident; V = Visitor; T rr Transient, 
t Measured length; all other lengths are estimated, 
i Breadth. 
§ The first record for Hawaiian waters, identified by Dr. Frank J. Mather, Woods Hole Oceanographic Institution, from 
a specimen preserved after capture at the raft. 
TABLE 2 
Average Net Increase or Decrease in Number of Residents* at the Raft per 12-Hour Day 
and 12-Hour Night 1 in Three Drift Areas 
(Number of 12-Hour Periods in Parentheses) 
FISH 
HAWAII 
OCTOBER 1962 
HAWAII 
AUGUST 1965 
0° LATITUDE 
FEBRUARY 1964 
3° 
MARCH 
s 
1964 
Day 
(9) 
Night 
(7) 
Day 
(8.5) 
Night 
(4) 
Day 
(7-5) 
Night 
(9) 
Day 
(8.5) 
Night 
(9.0) 
Psenes cyanophrys * 
24 
1 
107 
1 
18 
1 
100 
0 
Coryphaena sp. (juvenile) 
- 
- 
- 
- 
11 
— 2 
1 
—1 
Canthidermis maculatus 
7 
2 
3 
1 
- 
- 
- 
- 
Coryphaena hippurus (adult) 
4 
1 
10 
0 
- 
- 
- 
- 
Abudejduf abdominalis (juvenile) 
4 
— 1 
- 
- 
- 
- 
- 
- 
Decapterus pinnulatus (adult) 
■M 
- 
10 
— 5 
2 
0 
3 
-3 
Katsuwonus pelamis (juvenile) 
- 
- 
- 
- 
- 
3 
-3 
Naucrates ducior (juvenile) 
- 
- 
- 
- 
1 
— 1 
- 
- 
* Only the residents with an average 
accumulation 
equal to or 
greater 
than one 
fish per 
12 hours of 
daylight 
are in- 
eluded. 
t Population changes during the night were estimated by comparing the last count in the evening with the first count 
the following morning. 
t Increases are based on the rate for the first 100 to gather because larger numbers could not be counted accurately. 
