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Catches of albacore at different times of the day Public Deposited

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  • ORESU-R-75-009
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  • The purpose of this study is to examine the hypothesis that diel variations occur in the catches of albacore by boats trolling surface jigs off Oregon. Although albacore fishermen talk of "morning bites" and "evening bites," no published data exist, to our knowledge, confirming these trends. Studies on the feeding habits of tunas, however, provide evidence for intense feeding activity during certain periods of the day. Based on the quantity of food in stomachs, Iverson (1962) concluded that major feeding periods of albacore occurred in early morning and late afternoon-evening. Similarly, Nakamura (1965) and Dragovich (1970) found evidence for morning and late afternoon peaks in the stomach fullness of skipjack and yellowfin tunas. Food consumption of captive skipjack was greatest between 0630 and 0830 h, and skipjack tuna in only one of three tanks fed intensively in late afternoon (Magnuson 1969). This was in agreement with Uda (1940) who reported that catches of skipjack tuna with pole and live bait peaked in early morning hours and were usually followed by successively lower peaks later in the day.
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  • description.provenance : Made available in DSpace on 2010-01-07T16:15:09Z (GMT). No. of bitstreams: 1 CatchesAlbacoreDifferentTimesDay.pdf: 946554 bytes, checksum: 5e2132bfe42626c173edafa8a7cdacd7 (MD5) Previous issue date: 1975
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2010-01-07T16:15:09Z (GMT) No. of bitstreams: 1 CatchesAlbacoreDifferentTimesDay.pdf: 946554 bytes, checksum: 5e2132bfe42626c173edafa8a7cdacd7 (MD5)
  • description.provenance : Submitted by Joe Nguyen (jnscanner@gmail.com) on 2010-01-06T23:09:17Z No. of bitstreams: 1 CatchesAlbacoreDifferentTimesDay.pdf: 946554 bytes, checksum: 5e2132bfe42626c173edafa8a7cdacd7 (MD5)
  • Reprinted from Fishery Bulletin. 73(3): 691- 693. 1975. Published by the National Marine Fisheries Service, Seattle, WA.

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