coincidentally with stations are given in tables 4 

 and 5; those associated with BT lowerings while 

 under way are listed in tables Z and 3. 



BIOLOGICAL OBSERVATIONS 



Isotopic Carbon (Cj_i) Primary 

 Productivity Samples 



Surface water samples for the analysis of 

 Cj4 uptake by phytoplankton were collected by 

 scientists of both vessels with a clean plastic 

 bucket. They were then transferred to one 

 "dark" and two "light" bottles, inoculated with 

 radioactive sodium carbonate solution and in- 

 cubated in an illuminated water bath. The de- 

 tails followed in these procedures were those 

 described by King etal. (1957). Collections 

 were made around noon from both vessels. In 

 a few instances sonne were made at other times 

 when abrupt changes in temperature, light pen- 

 etration, or other environmental entities oc- 

 curred. The carbon fixation measurements and 

 calculations of the rate of carbon fixation (tables 

 4 and 5) were made using techniques developed 

 bySteemann Nielsen (1952) and modified by Doty 

 and Oguri (1958). 



Zooplankton Collections 

 Night surface tows were made from the 

 Smith for a period of 20 minutes with a l-mieter 

 plankton net. Similar tows were made at dusk 

 from th e Scofield. The net towed from the Smith 

 was constructed of Nitex and had a mesh aper- 

 ture of 0.656 mm. The amount of water strained 

 was metered with an Atlas flowmeter which had 

 been calibrated at the time of the Smith' s depar- 

 ture from Honolulu. The net used on the Scofield 

 was on loan from the Bureau of Commercial 

 Fisheries Biological Laboratory, La JoUa, and 

 was described as a 1-meter net having an ante- 

 rior portion of 30XXX grit gauze, Dufour bolt- 

 ing cloth (silk) and a posterior portion and cod 

 end of 56XXXgrit gauze. Aperture size (mode) 

 of these two portions was 0.0278 inches and 

 0. 0125 inches, respectively. The Japanese flow 

 meter used was calibrated after the cruise. All 

 plankton samples were preserved in 10 -percent 

 formalin buffered with borax and returned to 

 the Bureau of Commercial Fisheries Biological 

 Laboratory, Honolulu. The wet drained weight 

 was determined for each sample and entered in 

 tables 4 and 5 in terms of grams per 1,000 cubic 

 meters of water strained. 



Night-light Observations 



Night-light observations were made from 

 both the Snnith and the Scofield. Observations 

 from the Smith were for a period of 1 hour using 



as illumination the overside lights and the stern 

 deck light. The Scofield was equipped with a 

 1, 500 -watt bulb with a reflector suspended 3 to 

 4 feet above the water. A single station was 

 occupied by the Scofield for a period of 2 1/2 

 hours; other stations were planned but onnitted 

 because of the necessity to maintain headway 

 against high seas. Data obtained by the two 

 vessels are shown in tables 4 and 5. 



Occurrence of Fish, Birds, 

 and Aquatic Mammals 



Wheel watches of the Smith maintained 

 logs of fish, birds, and aquatic mammals sighted 

 during daylight hours. Sinnilar observations 

 were made from the Scofield and recorded in 

 the scientists' log. These observations are 

 tabulated in tables 6 and 7. 



MISCELLANEOUS OBSERVATIONS 



Miscellaneous observations were made by 

 scientists aboard the Smith as follows: (1) A 

 collection of shark intervertebral tissue wasi 

 made for Dr. Karl Meyer of Columbia Univer- 

 sity, New York. (2) Blood serum was extracted 

 for racial studies from two bigeye tuna, Para - 

 thunnus sibi (Temminck and Schlegel) , and one 

 skipjack tuna, Katsuwonus pelamis (Linnaeus), 

 for the Bureau of Commercial Fisheries Biolog- 

 ical Laboratory, Seattle, Washington. (3) A 

 small net was placed in the rigging of the ship, 

 and the removable cod end was changed at noon 

 for 19 days in an effort to capture airborne in- 

 sects for the Bishop Museum of Honolulu, Ha- 

 waii. (4) Fifteen times during the cruise of the 

 Smith Cii samples were incubated by towing 

 them astern in a manner requested by Dr. M. S. 

 Doty of the University of Hawaii at Honolulu, 

 Hawaii. 



ACKNOW LEDGMENTS 



Field Party Personnel: 



Hugh M. Smith 



Robert E. K. D. Lee - Master 

 Joseph J. Graham - Field Party Chief 

 Murice O. Rinkel - Oceanographer 

 Richard N. Uchida - Fishery Research 



Biologist 



N. B. Scofield 



Richard B. Mitchell - Master 

 William L. Craig - Field Party Chief 

 Donald A. Carvalho - Assistant 



