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Hawaiian Fisheries Issues-3

Hawaiian Fisheries Issues-3. Guide for Nearshore Fishes-NMFS/DAR Lay Gill Net Restrictions Omilu Story Leave the Big Ones Humpback Whale – Recent Phenomenon? Deep 7 Bottomfish Closure. Reference.

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Hawaiian Fisheries Issues-3

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  1. Hawaiian Fisheries Issues-3 • Guide for Nearshore Fishes-NMFS/DAR • Lay Gill Net Restrictions • Omilu Story • Leave the Big Ones • Humpback Whale – Recent Phenomenon? • Deep 7 Bottomfish Closure

  2. Reference • Shomura, R. 1987. Hawaii’s Fisheries Resources Yesterday (1900) and today (1986). Southwest Fisheries Center Administrative Report 87/21. 14pp. • SH319 H3 S56 1987

  3. Lower biomass of reef fishes Fewer larger fish History Over-fishing Efficient Left unattended “disposable” By-catch Ghost-fishing Substrate destruction Case against Lay Gill Nets

  4. Survey Gauging Public Attitudes • 96%: ocean/reefs are “very important” • 65%: conditions are fair-poor & worsening • 65%: recreational over-fishing = problem • After learning the term • 94%: concerned over impact • 76%: support for ban/restrictions

  5. DLNR: Limit 10” (250mm) LR50 i.e., “legal” Tournament Results Sampled 200 fish Avg L = 350mm 6 = sexually mature All >600mm Omilu –White Ulua

  6. Leave the Big Ones • More fecund • Larvae show better survival • Birkeland, c. and P. Dayton. 2005. the importance in fishery management of leaving the big ones. Trends in Ecology and Evolution. 20(7):356-7.

  7. Humpback Whales in Hawaii • A Recent Phenomenon ? • Not Present vs Not Noticed • Recent Hawaiian Whale History • Herman, L. M. 1979. Pacific Science. 33(1): 1-15

  8. Early Hawaii Whaling History • 1820- Sperm whaling off Japan • Balaena ..took a sperm whale • 1840’s: 1st signs of humpbacks in Hawaii • 1850’s more shore stations-rendering • 1915- evidence of lower humpback #’s • 1962-3: ~3400 humpbacks harvested

  9. Viewing sites Boat contact Tail slapping Breaching Lahaina = capital Night singing Beachings Not Present vs Not Noticed • Cook’s log = 0 • Early writings = 0 • Petroglyphs = 0 • Chants = 0 • Vocabulary = 1 • Legends, myths = 0 • Diety = 0 • Ceremonies = 0 • Rituals = 0 • Artifacts = 0

  10. What caused the appearance? • Not food • Rx to disruptive relocation? • Natural meandering? • Changes in oceanographic conditions?

  11. Deep 7 Management

  12. Bottomfish Fish Species Affected by closure • Onaga • Ehu • Kalekale • Opakapaka • Gindai • Hapu‘upu‘u • Lehi Bottomfish • Onaga • Ehu • Opakapaka • Kalekale • Uku • Hapu‘upu‘u • Gindai • Lehi • Butaguchi • Ta‘ape • White Ulua

  13. Closure • May 15 – Oct 31 + ?? (Year by Year) • MHI • Deep 7 Species • Prohibited: Fish for, Possess, Sell • Release Incidental Catch

  14. Shafer-style Management • F- ratio (CFM / FM@SY) • Weighted for 3 zones • CPUE based on gear used over time • Weighted for habitat in 3 zones

  15. Biology of these Fishes • Spawning • Early life history • Settlement • Age at maturity • Long life span • Slow growth rates

  16. Current Status of Bottomfish in Hawaii’s Management Subareas

  17. More Information • Moffitt, et al., 2006. Status of the Hawaiian Bottomfish Stocks, 2004. PIFSC Admin. Report H-06-01. • http://www.pifsc.noaa.gov/adminrpts/2000-present/PIFSC_Admin_Rpt_06-01.pdf

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