Dear Dr. Wang:

You might check the following references.  The second one is a small paper,
only marginally useful, but has some information by time of day.

Blunt, C. E. J. R. 1960. Observations on the food habits of longline caught
bigeye and yellowfin tuna from the tropical eastern Pacific 1955-1956.
California Fish and Game 46: 69-80.

Fedoseev, Y. P., and V. N. Chur. 1979. Relationship between feeding
intensity of bigeye tuna (Thunnus obesus) of the Gulf of Guinea and their
catches in the day time. Collective Volume of Scientific Papers ICCAT: 287-289.

Hida, T. S. 1973. Food of tunas and dolphins (Pisces: Scombridae and
Coryphaenidae) with emphasis on the distribution and biology of their prey
Stolephorus buccaneeri (Engraulidae). U.S. National Marine Fisheries
Service, Fishery Bulletin 71: 135-143.

I hope these prove useful to you.
Sincerely,
Robert Olson, IATTC
-------------------
>Dear Colleagues:
>
>     I am looking for the information about the feeding behavior of the
>bigeye tuna,  especially for the feeding behavior at night.  I would very
>much appreciate any pointers to where I could find the relating papers or
>to whom he is doing such research work.
>Thank you very much for your help.
>
>C.H. WANG
>e-mail: [log in to unmask]
>1996-09-20
>
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  Robert J. Olson   ([log in to unmask])
  Senior Scientist
  Inter-American Tropical Tuna Commission
  Scripps Institution of Oceanography
  8604 La Jolla Shores Drive                 Phone:  619-546-7160
  La Jolla, CA USA 92037-1508                FAX:    619-546-7133